Some standard content:
Military standard for electronic industry of the People's Republic of China FL5911
General specification for micro Dewar
SJ 20784—2000
General specification for micro Dewar2000-10-20 Issued
Implementation on 2000-10-20
Approved by the Ministry of Information Industry of the People's Republic of China Military standard for electronic industry of the People's Republic of China General specification for micro Dewar
General specification for micro Dewar1 Scope
1.1 Subject content
SJ 20784—2000
This specification specifies the requirements, quality assurance provisions and delivery preparation of micro Dewar (hereinafter referred to as Dewar). 1.2 Scope of application
This specification is mainly applicable to the development and production of dewars for infrared detectors. Dewars for other purposes can also refer to and adopt 2 Reference documents
GB191-90 Packaging, storage and transportation graphic signs
GJB1788-93 Infrared detector test method 2040 Low temperature storage test GJB1788-93 Infrared detector test method 2010 Temperature shock test GJB1788-93 Infrared detector test method 2080 Vibration test GJB1788-93 Infrared detector test method 2070 Impact test 3 Requirements
3.1 Detailed specifications
The requirements of dewars shall comply with the provisions of this specification and detailed specifications. If the requirements of this specification conflict with those of detailed specifications, the detailed specifications shall prevail.
3.2 Qualification appraisal
The dewars provided according to this specification shall be qualified products after appraisal. 3.3 Materials
The grade, specification and type of materials shall meet all the requirements of this specification and the detailed specifications. 3.4 Design and Structure
The design of the dimensions, structure, function and interface of the dewar shall comply with the provisions of the detailed specifications. 3.5 Performance Characteristics
3.5. Window Characteristics
Tested in accordance with 4.5.2, the window band range and window peak perspective ratio shall comply with the provisions of the detailed specifications. 3.5.2 Static Heat Load
Tested in accordance with 4.5.3, the static heat load of the dewar shall not exceed the provisions of the detailed specifications. 3.5.3 Vacuum integrity
The Ministry of Information Industry of the People's Republic of China issued TKANrKAca-2000-10-20
2000-10-20 implementation
SJ 20784-2000
According to the test in 4.5.4, the vacuum integrity of the dewar shall comply with the provisions of the detailed specification. 3.5.4 Lead resistance
According to the test in 4.5.5, the lead resistance of the dewar shall comply with the provisions of the detailed specification. 3.5.5 Insulation resistance
According to the test in 4.5.6, the insulation resistance of the dewar lead shall comply with the provisions of the detailed specification. 3.5.6 Air tightness
According to the test in 4.5.7, the nitrogen leakage condensation rate before the dewar packaging shall not exceed the provisions of the detailed specification. 3.6 Environmental test
3.6.1 Low temperature storage test
After the test in accordance with 4.6.1, the static heat load of the dewar shall meet the requirements of 3.5.2. 3.6.2 Temperature shock test
After the test in accordance with 4.6.2, the static heat load of the dewar shall meet the requirements of 3.5.2. 3.6.3 Vibration test
After the test in accordance with 4.6.3, the static heat load, vacuum integrity and airtightness of the dewar shall meet the requirements of 3.5.2, 3.5.3 and 3.5.6.
3.6.4 Market shock test
After the test in accordance with 4.6.4, the dewar lead shall be conductive and shall meet the requirements of 3.5.4 and 3.5.5. 3.7 Appearance quality and mechanical inspection
3.7. 1 Weight
The weight of the dewar shall comply with the provisions of the detailed specification. 3.7.2 Dimensions
The dimensions and tolerances of the dewar shall comply with the provisions of the detailed specifications. 3.7.3 Marking
The dewar's marking shall include the product model, number and manufacturer's code, and shall be clearly visible. 3.7.4 Appearance
The dewar's appearance shall be smooth and flat, without burrs, cracks and other defects that affect its life and use. 4 Quality Assurance Provisions
4.1 Inspection Responsibilities
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any of the inspection items described in the specification. 4.2 Inspection Classification
The inspections specified in this specification are divided into:
8 Appraisal inspection;
b. Quality consistency inspection.
4.2.1 Production batch
A production batch shall consist of dewars manufactured under the same conditions with the same design, technology, materials and equipment. 4.2.2 Inspection batchwww.bzxz.net
The contractor shall submit all dewars for quality inspection and consistency inspection within the specified time to determine whether they meet the requirements of the detailed specifications and this specification.
SJ20784—2000
A inspection batch may consist of one production batch, or several production batches manufactured under essentially the same conditions (materials, technology, equipment, etc.). 4.3 Qualification inspection
Qualification inspection shall be carried out in a laboratory approved by the superior qualification organization. 4.3.1 Sampling
The dewars submitted for qualification inspection shall be drawn from the production line, and the samples shall be produced by the equipment and process normally used in production, and the number of samples shall not be less than 3. 4.3.2 Inspection
The identification inspection shall be carried out in accordance with the items and sequence specified in Table 1. Failure to meet any of the inspections shall be grounds for refusing to grant the identification approval.
Table 1 Identification Inspection
Inspection Items
Appearance Inspection\
Window Characteristics\
Lead Resistance 1)
Insulation Resistance 1
Air Tightness"
Static Heat Load
Vacuum Integrity
Low Temperature Storage Test
Temperature Shock Test
Vibration Test
Spiritual Shock Test
Note: 1) Inspection before packaging, which can also be replaced by other packaging samples. 4. 3. 3. Maintaining the qualification of the inspection
Requirement Article number
Method Article good
In order to maintain the qualification of the inspection, the contractor shall submit a report to the inspection agency every 12 months. The signing agency shall specify the starting reporting period. The report shall include a summary of the test results of the group A and group C inspections, and shall at least state the number of batches that have passed the inspection and the number of batches that failed: the number and type of any zero failures; the test items completed in a year: the test results of all repaired batches shall be distinguished and explained. 30 days before the end of each 12-month period Failure to submit a report may result in the loss of the product's qualification for identification. In addition to periodic submission of inspection data, at any time within a 12-month period, if the inspection data shows that the qualified product cannot meet the requirements of this specification, the contractor shall immediately notify the identification agency. If no production occurs within the reporting period, a report shall be submitted to prove that the contractor still has the necessary capabilities and equipment to produce the product. If production is still blocked within two consecutive reporting periods, based on the decision of the identification agency, the contractor may be required to provide product identification inspection requirements for inspection and explain the original reasons for the unproduced products. 4.4 Quality consistency inspection
Quality consistency inspection shall be carried out according to Group A and Group C (see Table 2 and Table 3). Group A is a batch inspection and Group C is a peri-period inspection.
iKAoNrKAca
4.4.1 Group A inspection
sJ 20784---2000
Group A inspection should be carried out before packaging. The inspection items are as shown in Table 2. All of them are 100% inspected and unqualified products are rejected. Table 2 Group A inspection
Inspection items
Appearance and mechanical inspection
Sealing characteristics
Insulation resistance
Hydrogen tightness
Requirement Article number
Method Article number
If the sample fails the Group A inspection, the contractor shall report the failure to the appraisal agency and the relevant competent authorities, and make corrections to the materials or processes according to the reasons for the failure. Or take corrective measures for both, and if deemed appropriate, take corrective measures for all products that are made of essentially the same materials and processes under essentially the same conditions and that are considered to be repairable when subjected to the same failure. After taking corrective measures, the additional samples should be re-tested in Group A (the certification body shall decide whether to conduct an inspection of all items or an inspection of the original sample failure items). At the same time, the Group A inspection can be restarted.
4.4.2 Group C Inspection
Group C inspection should be sampled from the batch that has passed the Group A inspection, and the sampling shall be in accordance with 4.4.3.1, the inspection cycle is 12 months and shall be carried out in accordance with the items and sequence specified in Table 3. Table 3 C-type inspection
Inspection items
Static heat load
Vacuum integrity
Low overflow storage test
Temperature shock test
Vibration test
Shock test
4.4.2.1 Sampling inspection
Requirements Article number
Samples for C-type inspection shall be drawn in the following manner, and unqualified products shall not be allowed. Table 4 Sampling Plan
100~299
300~499
500~999
1000 Above
4. 4. 2.2 Sample Handling
Samples that have passed the C group inspection shall not be delivered as genuine products 4.4.2.3 Non-conforming
Method Article Number
If the sample passes the C group inspection, the contractor shall report the failure to the appraisal agency and the relevant competent authorities, and take corrective measures on materials or processes or both according to the cause of non-conformity, and, if deemed appropriate, take corrective measures on all products manufactured with substantially the same materials and processes under substantially the same conditions and deemed to have suffered the same failure and can be repaired. Suspend the acceptance and delivery of products until the corrective measures are approved by the appraisal agency. After taking corrective measures, the additional samples shall be re-tested for Group C (the certification body shall decide whether to test all items or the items that failed in the original sample). At the same time, Group A inspection may be restarted. However, final acceptance and delivery shall not be carried out before the Group C re-test shows that the corrective measures are successful. If the failure still occurs after the re-test, the relevant failure information shall be provided to the certification body and the relevant competent authorities. 4.5 Inspection method
Unless otherwise specified, the environmental conditions for the Dewar static heat load test are as follows: Temperature: 20±2C:
Relative condensation: ≤60%;
Air pressure: 86106kPa.
4.5.1 Appearance and mechanical inspection
4.5.1.1 The Dewar shall be inspected by visual inspection and measuring instruments and scales that meet the accuracy requirements to verify whether the materials, design structure, function, marking, weight plate, and external surface meet the corresponding requirements (see 3.3, 3.4, and 3.7). 4.5.1.2 Visually inspect the surface of the optical window, which should be bright, clean and free of scratches. 4.5.2 Window characteristics
Use an infrared spectrometer that has been qualified and within the validity period to detect the window band range and band peak value perspective ratio.
4.5.3 Static heat load
When the chip is not working, place the Dewar in liquid nitrogen to achieve equilibrium, and use a balance and timer that have been qualified and within the validity period to monitor the weight change of liquid nitrogen. Before the liquid nitrogen evaporates, use the method of specified time or specified liquid nitrogen volume to measure the average rate of liquid nitrogen consumption and calculate its static heat load according to the formula. Q = rVm×103
Where: 9 is the static heat load, mW; r is the latent heat of liquid nitrogen evaporation, 196.7J/g;
- is the average rate of liquid nitrogen loss, /s.
4.5.4 Vacuum integrity
Put the dewar in a thermostat at room temperature, raise the temperature to 71°C and keep it warm for 72 hours. Take out the dewar from the thermostat and return it to room temperature. After the test, the change rate of the static heat load shall not be less than 15% of that before the test or in accordance with the provisions of the detailed specification. 4.5.5 Lead resistance
Before packaging, measure with a resistance meter that has been certified and is within the validity period. The measurement point and resistance value shall comply with the provisions of the detailed specification.
4.5.6 Insulation resistance
Before packaging, use a resistance tester that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specifications.
4.5.7 Air tightness
Use a high-sensitivity nitrogen mass spectrometer that has been qualified and within the validity period to test. The leakage rate shall comply with the detailed specifications. 4.6 Environmental test
Unless otherwise specified, environmental tests shall be carried out in accordance with the following provisions of GB1788. 5
TKANiKAca-
4.6. Low temperature storage test
SJ 20784--2000
The test shall be carried out in accordance with the test procedures specified in Method 2040 of GJB1788. The storage temperature is ~55°C. The test conditions and test equipment shall be selected according to the detector. 4.6.2 Temperature shock test
The test shall be carried out in accordance with the test procedure specified in Method 2010 of GJB1788. The temperature range is -55°C to 70°C. The test conditions and test equipment shall be selected according to the detector. 4.6.3 Vibration test
The test shall be carried out in accordance with the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment shall be selected according to the detector.
4. 6. 4 Shock test
The test shall be carried out in accordance with the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment shall be selected according to the detector.
4.7 Packaging inspection
It shall comply with the requirements of Chapter 5 of this specification and the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
Dewar should have a special packaging box with shock protection. The box should contain product instructions and certificates. The certificate should indicate:
a. Manufacturing unit:
b. Product model:
c. Detailed specification number:
d. Inspection or re-inspection date:
e: Inspector's seal.
5.2 Storage requirements
Dewar should be stored in a vacuum box or a protective sealed container. The storage temperature is -10~40C. The storage environment should be kept clean, general and free of corrosive gases. 5.3 Transportation requirements
Dewars should be transported in firm packaging boxes and marked with "Handle with care" and "Avoid condensation" as specified in GFB191-90. The packaging boxes containing Dewars should be transported in the prescribed manner and should be protected from direct rain, snow and mechanical collision during transportation. 6 Notes
6.1 Intended use
Dewars that comply with this specification are used in infrared detector components. 6.2 The following contents should be stated in the ordering documents
The contract or order should state: a. The name, number and release date of this specification; b. The name, number and release date of the applicable detailed specification; c. The test data to be provided; d. The order quantity:
B. Protective packaging and packing requirements.
6.3 Definition
SJ 20784—2000
6.3.1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared complete machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
The static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator reflecting the material selection, structure, surface treatment, cleaning and exhaust and welding technology of the Dewar, which can reflect the perfection of the Dewar vacuum performance. 6.4 Supply guarantee
The activation cycle of the dewar's getter is greater than 1 year, and the storage life of the dewar should generally be guaranteed for 3 years. The detailed specifications should specify the storage life of the dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification: Liu Hanying, Zhu Kuizhang, Ji Bin, Tian Qu. Project code: B710190.
iiiKAoNrkAca3 Failure
Methods Article No.
If the sample passes the Group C test, the contractor shall report the failure to the appraisal agency and the relevant competent authorities, and take corrective measures on the materials or processes or both according to the reasons for the failure, and take corrective measures, if deemed appropriate, on all products manufactured with substantially the same materials and processes under substantially the same conditions, and deemed to have suffered the same failure and can be repaired. Suspend the acceptance and delivery of the product before the corrective measures are approved by the appraisal agency. After the corrective measures are taken, the additional samples shall be re-tested with Group C (the appraisal agency shall decide whether to conduct the inspection of all items or the inspection of the original sample failure items). At the same time, the Group A inspection may be restarted. However, the final acceptance and delivery shall not be carried out until the Group C re-test shows that the corrective measures are successful. If the failure still occurs after the re-test, the relevant failure information shall be provided to the appraisal agency and the relevant competent authorities. 4.5 Inspection method
Unless otherwise specified, the environmental conditions for the Dewar static heat load test are as follows: Temperature: 20±2C:
Relative condensation: ≤60%;
Air pressure: 86106kPa.
4.5.1 Appearance and mechanical inspection
4.5.1.1 Inspect the Dewar visually and with measuring tools and scales that meet the accuracy requirements to verify whether the materials, design structure, function, marking, weight plate, and outer surface meet the corresponding requirements (see 3.3, 3.4, and 3.7). 4.5.1.2 Visually inspect the surface of the light window, which should be bright, clean, and free of scratches. 4.5.2 Window characteristics
Use an infrared spectrometer that has been qualified and within the validity period to test the window band range and band peak value perspective ratio.
4.5.3 Static heat load
When the chip is not working, place the Dewar in liquid nitrogen and make it reach equilibrium. Use a qualified and valid balance and timer to monitor the weight change of liquid nitrogen. Before the liquid nitrogen evaporates, measure the average rate of liquid nitrogen consumption by the method of specified time or specified liquid nitrogen amount and calculate its static heat load according to the formula. Q = rVm×103
Where: 9 is the static heat load, mW; r is the latent heat of evaporation of liquid nitrogen 196.7J/g:
— is the average rate of liquid nitrogen loss, /s.
4.5.4 Vacuum integrity
Put the Dewar in a constant temperature box at room temperature, raise it to 71°C and keep it warm for 72h. Take out the Dewar from the constant temperature box and return it to room temperature. After the test, the change rate of static heat load should not be less than 15% of that before the test or meet the requirements of the detailed specification. 4.5.5 Lead resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.6 Insulation resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.7 Air tightness
Use a high-sensitivity nitrogen mass spectrometer that has been qualified and within the validity period to detect. The leakage rate shall comply with the detailed specification. 4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions of GB1788. 5
TKANiKAca-
4.6. Low temperature storage test
SJ 20784--2000
The test shall be carried out in accordance with the test procedures specified in Method 2040 of GJB1788. The storage temperature is ~55°C. The test conditions and test equipment should be selected according to the detector. 4.6.2 Temperature shock test
The test shall be carried out according to the test procedure specified in Method 2010 of GJB1788. The temperature range is -55°C to 70°C. The test conditions and test equipment should be selected according to the detector. 4.6.3 Vibration test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4. 6. 4 Shock test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4.7 Packaging inspection
It shall comply with the requirements of Chapter 5 of this specification and the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
Dewar should have a special packaging box with shock protection. The box should contain product instructions and certificates. The certificate should indicate:
a. Manufacturing unit:
b. Product model:
c. Detailed specification number:
d. Inspection or re-inspection date:
e: Inspector's seal.
5.2 Storage requirements
Dewar should be stored in a vacuum box or a protective sealed container. The storage temperature is -10~40C. The storage environment should be kept clean, general and free of corrosive gases. 5.3 Transportation requirements
Dewars should be transported in firm packaging boxes and marked with "Handle with care" and "Avoid condensation" as specified in GFB191-90. The packaging boxes containing Dewars should be transported in the prescribed manner and should be protected from direct rain, snow and mechanical collision during transportation. 6 Notes
6.1 Intended use
Dewars that comply with this specification are used in infrared detector components. 6.2 The following contents should be stated in the ordering documents
The contract or order should state: a. The name, number and release date of this specification; b. The name, number and release date of the applicable detailed specification; c. The test data to be provided; d. The order quantity:
B. Protective packaging and packing requirements.
6.3 Definition
SJ 20784—2000
6.3.1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared complete machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
The static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator reflecting the material selection, structure, surface treatment, cleaning and exhaust and welding technology of the Dewar, which can reflect the perfection of the Dewar vacuum performance. 6.4 Supply guarantee
The activation cycle of the dewar's getter is greater than 1 year, and the storage life of the dewar should generally be guaranteed for 3 years. The detailed specifications should specify the storage life of the dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification: Liu Hanying, Zhu Kuizhang, Ji Bin, Tian Qu. Project code: B710190.
iiiKAoNrkAca3 Failure
Methods Article No.
If the sample passes the Group C test, the contractor shall report the failure to the appraisal agency and the relevant competent authorities, and take corrective measures on the materials or processes or both according to the reasons for the failure, and take corrective measures, if deemed appropriate, on all products manufactured with substantially the same materials and processes under substantially the same conditions, and deemed to have suffered the same failure and can be repaired. Suspend the acceptance and delivery of the product before the corrective measures are approved by the appraisal agency. After the corrective measures are taken, the additional samples shall be re-tested with Group C (the appraisal agency shall decide whether to conduct the inspection of all items or the inspection of the original sample failure items). At the same time, the Group A inspection may be restarted. However, the final acceptance and delivery shall not be carried out until the Group C re-test shows that the corrective measures are successful. If the failure still occurs after the re-test, the relevant failure information shall be provided to the appraisal agency and the relevant competent authorities. 4.5 Inspection method
Unless otherwise specified, the environmental conditions for the Dewar static heat load test are as follows: Temperature: 20±2C:
Relative condensation: ≤60%;
Air pressure: 86106kPa.
4.5.1 Appearance and mechanical inspection
4.5.1.1 Inspect the Dewar visually and with measuring tools and scales that meet the accuracy requirements to verify whether the materials, design structure, function, marking, weight plate, and outer surface meet the corresponding requirements (see 3.3, 3.4, and 3.7). 4.5.1.2 Visually inspect the surface of the light window, which should be bright, clean, and free of scratches. 4.5.2 Window characteristics
Use an infrared spectrometer that has been qualified and within the validity period to test the window band range and band peak value perspective ratio.
4.5.3 Static heat load
When the chip is not working, place the Dewar in liquid nitrogen and make it reach equilibrium. Use a qualified and valid balance and timer to monitor the weight change of liquid nitrogen. Before the liquid nitrogen evaporates, measure the average rate of liquid nitrogen consumption by the method of specified time or specified liquid nitrogen amount and calculate its static heat load according to the formula. Q = rVm×103
Where: 9 is the static heat load, mW; r is the latent heat of evaporation of liquid nitrogen 196.7J/g:
— is the average rate of liquid nitrogen loss, /s.
4.5.4 Vacuum integrity
Put the Dewar in a constant temperature box at room temperature, raise it to 71°C and keep it warm for 72h. Take out the Dewar from the constant temperature box and return it to room temperature. After the test, the change rate of static heat load should not be less than 15% of that before the test or meet the requirements of the detailed specification. 4.5.5 Lead resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.6 Insulation resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.7 Air tightness
Use a high-sensitivity nitrogen mass spectrometer that has been qualified and within the validity period to detect. The leakage rate shall comply with the detailed specification. 4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions of GB1788. 5
TKANiKAca-
4.6. Low temperature storage test
SJ 20784--2000
The test shall be carried out in accordance with the test procedures specified in Method 2040 of GJB1788. The storage temperature is ~55°C. The test conditions and test equipment should be selected according to the detector. 4.6.2 Temperature shock test
The test shall be carried out according to the test procedure specified in Method 2010 of GJB1788. The temperature range is -55°C to 70°C. The test conditions and test equipment should be selected according to the detector. 4.6.3 Vibration test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4. 6. 4 Shock test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4.7 Packaging inspection
It shall comply with the requirements of Chapter 5 of this specification and the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
Dewar should have a special packaging box with shock protection. The box should contain product instructions and certificates. The certificate should indicate:
a. Manufacturing unit:
b. Product model:
c. Detailed specification number:
d. Inspection or re-inspection date:
e: Inspector's seal.
5.2 Storage requirements
Dewar should be stored in a vacuum box or a protective sealed container. The storage temperature is -10~40C. The storage environment should be kept clean, general and free of corrosive gases. 5.3 Transportation requirements
Dewars should be transported in firm packaging boxes and marked with "Handle with care" and "Avoid condensation" as specified in GFB191-90. The packaging boxes containing Dewars should be transported in the prescribed manner and should be protected from direct rain, snow and mechanical collision during transportation. 6 Notes
6.1 Intended use
Dewars that comply with this specification are used in infrared detector components. 6.2 The following contents should be stated in the ordering documents
The contract or order should state: a. The name, number and release date of this specification; b. The name, number and release date of the applicable detailed specification; c. The test data to be provided; d. The order quantity:
B. Protective packaging and packing requirements.
6.3 Definition
SJ 20784—2000
6.3.1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared complete machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
The static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator reflecting the material selection, structure, surface treatment, cleaning and exhaust and welding technology of the Dewar, which can reflect the perfection of the Dewar vacuum performance. 6.4 Supply guarantee
The activation cycle of the dewar's getter is greater than 1 year, and the storage life of the dewar should generally be guaranteed for 3 years. The detailed specifications should specify the storage life of the dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification: Liu Hanying, Zhu Kuizhang, Ji Bin, Tian Qu. Project code: B710190.
iiiKAoNrkAca3 Static heat load
When the chip is not working, place the Dewar in liquid nitrogen to balance it. Use a qualified and valid balance and timer to monitor the weight change of liquid nitrogen. Before the liquid nitrogen evaporates, measure the average rate of liquid nitrogen consumption by the method of specified time or specified liquid nitrogen amount and calculate its static heat load according to the formula. Q = rVm×103
Where: 9 is the static heat load, mW; r is the latent heat of evaporation of liquid nitrogen 196.7J/g:
— is the average rate of liquid nitrogen loss, /s.
4.5.4 Vacuum integrity
Put the Dewar in a constant temperature box at room temperature, raise it to 71°C and keep it warm for 72h. Take out the Dewar from the constant temperature box and return it to room temperature. After the test, the change rate of the static heat load should be less than 15% of that before the test or meet the requirements of the detailed specification. 4.5.5 Lead resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.6 Insulation resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.7 Air tightness
Use a high-sensitivity nitrogen mass spectrometer that has been qualified and within the validity period to detect. The leakage rate shall comply with the detailed specification. 4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions of GB1788. 5
TKANiKAca-
4.6. Low temperature storage test
SJ 20784--2000
The test shall be carried out in accordance with the test procedures specified in Method 2040 of GJB1788. The storage temperature is ~55°C. The test conditions and test equipment should be selected according to the detector. 4.6.2 Temperature shock test
The test shall be carried out according to the test procedure specified in Method 2010 of GJB1788. The temperature range is -55°C to 70°C. The test conditions and test equipment should be selected according to the detector. 4.6.3 Vibration test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4. 6. 4 Shock test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4.7 Packaging inspection
It shall comply with the requirements of Chapter 5 of this specification and the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
Dewar should have a special packaging box with shock protection. The box should contain product instructions and certificates. The certificate should indicate:
a. Manufacturing unit:
b. Product model:
c. Detailed specification number:
d. Inspection or re-inspection date:
e: Inspector's seal.
5.2 Storage requirements
Dewar should be stored in a vacuum box or a protective sealed container. The storage temperature is -10~40C. The storage environment should be kept clean, general and free of corrosive gases. 5.3 Transportation requirements
Dewars should be transported in firm packaging boxes and marked with "Handle with care" and "Avoid condensation" as specified in GFB191-90. The packaging boxes containing Dewars should be transported in the prescribed manner and should be protected from direct rain, snow and mechanical collision during transportation. 6 Notes
6.1 Intended use
Dewars that comply with this specification are used in infrared detector components. 6.2 The following contents should be stated in the ordering documents
The contract or order should state: a. The name, number and release date of this specification; b. The name, number and release date of the applicable detailed specification; c. The test data to be provided; d. The order quantity:
B. Protective packaging and packing requirements.
6.3 Definition
SJ 20784—2000
6.3.1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared complete machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
The static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator reflecting the material selection, structure, surface treatment, cleaning and exhaust and welding technology of the Dewar, which can reflect the perfection of the Dewar vacuum performance. 6.4 Supply guarantee
The activation cycle of the dewar's getter is greater than 1 year, and the storage life of the dewar should generally be guaranteed for 3 years. The detailed specifications should specify the storage life of the dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification: Liu Hanying, Zhu Kuizhang, Ji Bin, Tian Qu. Project code: B710190.
iiiKAoNrkAca3 Static heat load
When the chip is not working, place the Dewar in liquid nitrogen to balance it. Use a qualified and valid balance and timer to monitor the weight change of liquid nitrogen. Before the liquid nitrogen evaporates, measure the average rate of liquid nitrogen consumption by the method of specified time or specified liquid nitrogen amount and calculate its static heat load according to the formula. Q = rVm×103
Where: 9 is the static heat load, mW; r is the latent heat of evaporation of liquid nitrogen 196.7J/g:
— is the average rate of liquid nitrogen loss, /s.
4.5.4 Vacuum integrity
Put the Dewar in a constant temperature box at room temperature, raise it to 71°C and keep it warm for 72h. Take out the Dewar from the constant temperature box and return it to room temperature. After the test, the change rate of the static heat load should be less than 15% of that before the test or meet the requirements of the detailed specification. 4.5.5 Lead resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.6 Insulation resistance
Before packaging, use a resistance meter that has been qualified and within the validity period to measure. The measuring point and resistance value shall comply with the provisions of the detailed specification.
4.5.7 Air tightness
Use a high-sensitivity nitrogen mass spectrometer that has been qualified and within the validity period to detect. The leakage rate shall comply with the detailed specification. 4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions of GB1788. 5
TKANiKAca-
4.6. Low temperature storage test
SJ 20784--2000
The test shall be carried out in accordance with the test procedures specified in Method 2040 of GJB1788. The storage temperature is ~55°C. The test conditions and test equipment should be selected according to the detector. 4.6.2 Temperature shock test
The test shall be carried out according to the test procedure specified in Method 2010 of GJB1788. The temperature range is -55°C to 70°C. The test conditions and test equipment should be selected according to the detector. 4.6.3 Vibration test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4. 6. 4 Shock test
The test shall be carried out according to the test procedure specified in Method 2080 of GJB1788. The test conditions and test equipment should be selected according to the detector.
4.7 Packaging inspection
It shall comply with the requirements of Chapter 5 of this specification and the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
Dewar should have a special packaging box with shock protection. The box should contain product instructions and certificates. The certificate should indicate:
a. Manufacturing unit:
b. Product model:
c. Detailed specification number:
d. Inspection or re-inspection date:
e: Inspector's seal.
5.2 Storage requirements
Dewar should be stored in a vacuum box or a protective sealed container. The storage temperature is -10~40C. The storage environment should be kept clean, general and free of corrosive gases. 5.3 Transportation requirements
Dewars should be transported in firm packaging boxes and marked with "Handle with care" and "Avoid condensation" as specified in GFB191-90. The packaging boxes containing Dewars should be transported in the prescribed manner and should be protected from direct rain, snow and mechanical collision during transportation. 6 Notes
6.1 Intended use
Dewars that comply with this specification are used in infrared detector components. 6.2 The following contents should be stated in the ordering documents
The contract or order should state: a. The name, number and release date of this specification; b. The name, number and release date of the applicable detailed specification; c. The test data to be provided; d. The order quantity:
B. Protective packaging and packing requirements.
6.3 Definition
SJ 20784—2000
6.3.1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared complete machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
The static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator reflecting the material selection, structure, surface treatment, cleaning and exhaust and welding technology of the Dewar, which can reflect the perfection of the Dewar vacuum performance. 6.4 Supply guarantee
The activation cycle of the dewar's getter is greater than 1 year, and the storage life of the dewar should generally be guaranteed for 3 years. The detailed specifications should specify the storage life of the dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification: Liu Hanying, Zhu Kuizhang, Ji Bin, Tian Qu. Project code: B710190.
iiiKAoNrkAca1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
Static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator that reflects the material selection, structure, surface treatment, cleaning and exhaust, and welding technology of the Dewar, which can reflect the perfection of the vacuum performance of the Dewar. 6.4 Supply guarantee
The activation cycle of the Dewar's getter is greater than 1 year, and the storage life of the Dewar should generally be guaranteed for 3 years. The detailed specification should specify the storage life of the Dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification are Liu Hanying, Zhu Kuizhang, Ji Bin, and Tian Qu. Project code: B710190.
iiiKAoNrkAca1 Micro Dewar (also known as micro Dewar bottle) is a vacuum device that uses a micro-encapsulated infrared chip and should have an interface with the infrared machine of the refrigerator (machine) and maintain its normal operation at a temperature of 100 °C. It can also be used with a refrigerator (machine). 6.3.2 Static heat load
Static heat load is the "reactive cooling loss" of the Dewar under the specified environmental conditions after the Dewar loading surface is cooled to the specified temperature and reaches thermal equilibrium when the chip is working. The unit is mW. 6.3.3 Vacuum perfection
Vacuum perfection is a comprehensive indicator that reflects the material selection, structure, surface treatment, cleaning and exhaust, and welding technology of the Dewar, which can reflect the perfection of the vacuum performance of the Dewar. 6.4 Supply guarantee
The activation cycle of the Dewar's getter is greater than 1 year, and the storage life of the Dewar should generally be guaranteed for 3 years. The detailed specification should specify the storage life of the Dewar.
Additional remarks:
This specification is under the jurisdiction of the China Electronics Technology Standardization Research Institute. This specification was drafted by the 16th Electronic Research Institute of the Ministry of Information Industry. The main drafters of this specification are Liu Hanying, Zhu Kuizhang, Ji Bin, and Tian Qu. Project code: B710190.
iiiKAoNrkAca
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