prepreg for use as bonding sheet material in the fabrication of multilayer printed boards
Some standard content:
UDC621.3.049.75:621.315.616
National Standard of the People's Republic of China
GB10243--88
Reduced to SJ/T11050-96
Prepreg for use as bonding sheetmaterial in the fabrication of multilayer printed boardsPublished on 1988-12-30
Published by the State Administration of Technical Supervision
TTTKKAca
Implemented on 1989-07-01
National Standard of the People's Republic of China
Prepreg foruseas bonding sheetmaterial in the fabrication of multilayer printed boards boardsGB10243-88
This standard mainly specifies the performance requirements and test methods of prepreg materials used for interlayer bonding and insulation of multilayer printed boards. The prepreg materials specified in this standard are two types of epoxy resin impregnated glass cloth cured to stage B-bonding sheet materials. This standard is equivalent to IEC249-3--1 (1981) "Substrate for printed circuits Part 3: "Specification for special materials related to printed circuits NO.1: Prepreg materials used as bonding sheets in the manufacture of multilayer printed boards". 1 Model
G type: general epoxy resin impregnated glass cloth. GF type: epoxy resin impregnated glass cloth with limited flammability (i.e. flame retardant). 2 Structure
The bonding sheet prepreg material (hereinafter referred to as bonding sheet) is composed of glass cloth and stage B epoxy resin. 3 Technical requirements
3.1 Thickness after lamination
refers to the average thickness of each bonding sheet after pressing under the conditions recommended by the bonding sheet material manufacturer. The standard procedure for determining the average thickness is shown in 4.5. The manufacturer shall state the thickness after lamination and provide recommended pressing conditions. Note: ① The recommended conditions vary depending on the characteristics of the bonding sheet material. ② The allowable deviation of the material thickness after lamination and curing shall be agreed upon by the supplier and the buyer. 3.2 Appearance
The bonding sheet should be free of cracks (referring to glass cloth), foreign impurities or other defects that are not conducive to use. There is no excessive trace of resin powder on the surface, but cracks are allowed.
3.3 Properties of bonding sheet materials
The bonding sheet materials shall meet the following requirements.
3.3.1 The properties of the bonding sheet materials before lamination shall comply with the provisions of Table 1. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on October 9, 1988YYKAONYKCabzxz.net
Implementation on July 1, 1989
Volatile matter content<
Resin content
Resin fluidity
Gelation time
Note: The nominal value is determined by the supply and demand parties.
3.3.2 Properties of bonding sheet materials after lamination
GB10243—88
Test method
(Clause)
X±5 for any specimen)
X±3 (when nominal value X≤20%)
X±5 (when nominal value x>20%)
x(1±15%)
Recommended value
(1)24±5
100±15
(2)150±20
(3)200±30
According to the procedure recommended by the manufacturer, the bonding sheet shall be pressed into a laminate with a nominal thickness of 0.8 mm. Its properties shall comply with the requirements of Table 2. Table 2
Flame retardancy (GF type only)
Heat shock
Dielectric constant after constant damp heat
(10°Hz)
Dielectric loss tangent after constant sensible heat (10°Hz)
Electrical strength (vertical
to the board surface) (optional)
4 Test method
4.1 Resin content (R)
4.1.1 Test sample
Test method
GB4722 clause
Each sample shall burn with flame after each application of the test flame
Time
5 samples per batch, apply flame 10 times
Total flaming burning time
No flame after removing the test flame for the second time
Burning time
Flaming or flameless burning until the fixture
Dropped flame particles ignite tissue paper
≤30s
20sNo bubbling, no delamination
≥10kV/mm
As shown in the figure, cut three 100mm×100mm square samples along the straight line perpendicular to the warp of the glass cloth. The two diagonals of the samples should be parallel to the warp and weft respectively. The first sample is taken from the place with equal distance to both sides of the glass cloth, and the other two are taken at the relative positions on both sides of the first sample. The distance between the end of the square corner of the sample and the edge of the cloth or the selvedge is 50±25mm. Loose particles and protruding fibers on the sample should be removed.
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Border or selvedge
50±25mm
GB10243—88
50±25mm
Border or selvedge
Schematic diagram of sampling locations for resin content, resin fluidity, volatile content and thickness. 4.1.2 Test procedure
Place a sample of appropriate size in a muffle furnace and heat it at 500-600℃ for 15min, then cool it in a desiccator to room temperature, weigh it (ml) and accurately to 1mg. Place another sample in a crucible and weigh it (mz) and accurately to 1mg, burn it in a muffle furnace at 550-600C for 1h, take it out, cool it in a desiccator to room temperature, and weigh it again, accurately to 1mg. Repeat burning, cooling and weighing until the deviation of two consecutive weighings (mg) is within 2mg.
4.1.3 Calculation
R(%) =
100(m2-m3)
Where: V is the percentage of volatile content (using the same batch of materials and measured according to 4.3). 4.1.4 Result
The average value of the three samples measured by the above sampling method and test method is taken as the resin content of the bonding sheet material. .
Note: In the routine quality control of the manufacturing process, the mass of the prepreg material sample is usually compared with the mass of the unimpregnated glass cloth sample of the same size on the corresponding position plate of the same roll of glass cloth. The calculation of the resin content is still in accordance with 4.1.3, except that the weighing does not use a crucible, but the glass cloth treatment agent content must be removed. The treatment agent content is measured by the unimpregnated material according to the procedure of 4.1.2. 4.2 Resin fluidity (F)
4.2.1 Samples
The size and sampling method of the samples are the same as those in 4.1.1, with a quantity of 8 to 20 sheets and a total mass of 10 to 30 g. The required number of samples should be evenly distributed and cut from the entire width of the sheet or roll. 4.2.2 Test procedure
Weigh the sample (ml) and be accurate to 0.01 g. Then stack the sample neatly in the middle between two stainless steel plates coated with appropriate release agents (the steel plates are square, with a thickness of 1.6 ± 0.8 mm and a side length of not less than 125 mm), and then place them on the press heating plate at 170 ± 3 ° C, and quickly close the press. And within 5 seconds, increase the pressure to 1.5 ± 0.15 MPa (15 ± 1.5 kgf/cm*), keep the temperature and pressure for 10 minutes (or longer), then open the press, take out the steel plate, remove the laminated sample, and cool to room temperature. Cut a square or round plate with an area of 5000mm2 from the middle part (the side length of the square plate is 70.7±0.4mm, and the diameter of the round plate is 79.8±0.4mm). Weigh (mz) and be accurate to 0.0lg. YYKAONYKCa
4.2.3 Calculation
Calculate to an accuracy of 1%.
4.3 Volatile content (V)
4.3.1 Sample
GB10243—88
F(%) = 100(ml - 2m2)
The size and sampling method of the sample are the same as those in 4.1.1. The number is 3, and a small hole is punched in the corner of each sample. 4.3.2 Test procedure
Weigh the three samples together (m) to an accuracy of 1 mg, and then hang them separately in an oven with air circulation at 163±3℃ for 15min±15s. Take out the samples and cool them in a desiccator for 5min, then immediately weigh the three samples together (mz) to an accuracy of 1mg. Weighing should be done as quickly as possible to avoid errors caused by moisture absorption.
4.3.3 Calculation
V(%) = 100(mi - m2)
4.4 Gel Time
4.4.1 Sample
Cut a sample of about 100mm×100mm or other appropriate size at least 25mm away from the edge or selvedge of the adhesive sheet material along the width direction of the single sheet or roll, fold or crush the sample to make the dry resin fall from the adhesive sheet, collect them on a clean and smooth carrier, sieve out the resin powder with a 100-mesh sieve, and weigh 200-300mg of the resin powder as the test sample. 4.4.2 Test Procedure
Heat the iron plate for measuring the gel time to 170±2℃, pour the weighed resin powder into the groove in the center of the iron plate, start the timer at the moment the resin contacts the hot plate, stir the resin with a wooden stick with a diameter of 3mm, and occasionally use the wooden stick to pick up the thickened resin to make it draw. When the gelation end point is approaching, the frequency of picking up the wire with the rod should be increased. When the resin no longer forms wires, stop the timer immediately and record the time.
4.4.3 Results
The measured time is the gelation time of the bonding sheet material (in seconds). Note: ① When the material is too soft and the resin cannot be separated by the breakage method, the resin can be obtained by contacting the folded material pile with a hot plate and squeezing out the molten resin. ② The gelation time can also be measured by placing the resin sample in a rotary viscometer and measuring the viscosity of the corresponding gelation point. At this time, more data on the flow characteristics of the resin can be obtained. 4.5 Thickness of the bonding sheet material after lamination
4.5.1 Samples
Take two samples of not less than 100mm×100mm from a straight line position perpendicular to the warp of the glass cloth, and the diagonal of the sample is parallel to the warp and weft. One specimen is cut from a position equidistant from both sides, and the outer end of the other specimen is to be 50 ± 25 mm from the border or selvedge (see Figure 4.1.1). All loose particles and protruding fibers are to be removed from the specimen. 4.5.2 Lamination
The two specimens cut are stacked together, their edges carefully aligned, and then placed between stainless steel plates or other metal plates of uniform thickness to form a laminate. The thickness of the metal plates ranges from 0.8 to 2.4 mm, and the plates are coated with a release agent corresponding to the type of resin. Lamination and curing are carried out according to the conditions recommended by the adhesive sheet manufacturer. After lamination, the press is opened, the specimen is removed, and allowed to cool to room temperature. A 25 mm wide edge is cut from each side of the laminate. 4.5.3 Test procedure
The thickness of the cured laminate is measured with a micrometer at the middle of each side 510 mm from the edge. 4.5.4 Calculation and results
YYKAONYKCa
GB10243-88
Half of the arithmetic mean of the four measured data is taken as the thickness of the bonding sheet material after lamination. 5 Inspection rules
To be agreed upon by the supplier and the buyer.
6 Marking, packaging, transportation and storage
6.1 When the bonding sheet material is provided in sheet form, each sheet of bonding sheet material in the packaging bag shall be stacked in the warp direction of the glass cloth and marked in this direction. If it is provided in rolls, both ends of the roll shall be properly protected. Each bag (roll) shall be sealed and a desiccant shall be placed inside. 6.2 Each package shall be accompanied by a certificate of conformity and shall be marked with the manufacturer's name, standard number, model, batch number, date of manufacture and the properties of the glass cloth before impregnation (resin content, resin fluidity, gelation time, volatile content), lamination conditions and thickness after lamination. 6.3 When supplied in rolls, the adhesive sheet shall comply with the following additional requirements. 6.3.1 For rolls with a width exceeding 800 mm, the deviation from the nominal width shall not exceed ±25 mm. 6.3.2 For rolls cut to a certain width, the deviation from the nominal width shall not exceed ±3 mm. 6.3.3 The deviation of the adhesive sheet material over the roll length shall be less than 1 m. 6.3.4 For adhesive sheet material supplied in a whole piece, there shall not be more than 2 joints in any 100 m length. For adhesive sheets cut to a certain width, there shall not be more than 5 joints in any 100 m length. Note: If the material is supplied in rolls, the area from which the sample was taken may be completely removed and the remaining material joined to the roll. In this case, the requirements of 6.3.4 are still met. This method allows tests to be conducted every 50 m.
6.3.5 When the manufacturer takes samples along the width of the adhesive sheet material for quality control testing, the total area taken shall not exceed 2% of the total area of the roll.
Note: When the number of tests is insufficient, it is allowed to cut samples for additional tests without creating new joints. When the material is supplied in rolls cut into a certain width, if the width is less than the sampling requirement, it is usually required to cut out the sampling area before cutting into a certain width, and then connect the remaining material to the roll. 6.4 The material should be protected from sunlight, rain and mechanical damage during transportation. 6.5 The material should be stored at a temperature not exceeding 22°C, a relative humidity not exceeding 50%, and free from direct sunlight and other catalysts. From the date of manufacture, the performance should be guaranteed to meet the requirements of Article 3.3.1 within a storage period of 90 days. 5
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Glass cloth structure
GB10243—88
Appendix A
Glass cloth materials for bonding sheets
(Supplement)
Glass cloth is a plain woven cloth for electrical use, woven from continuous glass fiber yarn with an alkali metal oxide content not exceeding 0.5%, and treated with a metal bonding agent suitable for epoxy resin.
A2 Glass cloth properties
A2.1 The manufacturer of the bonding sheet should specify the following properties of the glass cloth before impregnation: Nominal thickness
Nominal mass per unit area
Warp and weft density
A2.2 The performance data of the recommended glass cloth are shown in the following table: Nominal thickness
Note: Specifications not listed in the table shall be agreed upon by the supply and demand parties. Additional notes:
Nominal mass per unit area
(g/m2)
This standard was drafted by the 704th Factory of the Ministry of Machinery and Electronics Industry and the Institute of Electronic Standardization. Drafters of this standard: Zhu Hongjiao, Yang Xiuqiong, Tong Xiaoming. Density (root/cm)
Warp and weft
24×20
24×19
16×15
24×25
24×23
From the date of implementation of this standard, the original SJ1803-81 "HABD67 epoxy glass cloth (prepreg)" standard will be invalid. 8
YYKAONTKa3 Test procedure
The thickness of the cured laminate is measured with a micrometer at the middle of each side 510mm away from the edge. 4.5.4 Calculation and results
YYKAONYKCa
GB10243-88
Half of the arithmetic mean of the four measured data is taken as the thickness of the bonding sheet material after lamination. 5 Inspection rules
Agreed by both the supplier and the buyer.
6 Marking, packaging, transportation and storage
6.1 When the bonding sheet material is provided in sheet form, each sheet of bonding sheet material in the packaging bag shall be stacked in the longitudinal direction of the glass cloth and marked in this direction. If it is provided in rolls, the two ends of the roll shall be properly protected. Each bag (roll) shall be sealed and a desiccant shall be placed inside. 6.2 Each package shall be accompanied by a certificate of conformity and shall be marked accordingly with the manufacturer's name, standard number, model, batch number, date of manufacture and the properties of the glass cloth before impregnation (resin content, resin fluidity, gelation time, volatile content), lamination conditions and thickness after lamination, etc. 6.3 When provided in rolls, the adhesive sheet shall also meet the following additional requirements. 6.3.1 For rolls with a width exceeding 800mm, the deviation of the nominal width shall not exceed ±25mm. 6.3.2 For rolls cut to a certain width, the deviation of the nominal width shall not exceed ±3mm. 6.3.3 The deviation of the adhesive sheet material in the roll length shall be less than 1m. 6.3.4 For adhesive sheet materials provided in whole pieces, there shall be no more than 2 joints in any 100m length. For adhesive sheets cut to a certain width, there shall be no more than 5 joints in any 100m length. Note: If the material is supplied in rolls, the sampled area can be completely cut off and the remaining material can be connected to the roll. In this case, it still meets the requirements of Article 6.3.4. This method allows tests to be conducted every 50m.
6.3.5 When the manufacturer takes samples along the width of the adhesive sheet material for quality control tests, the total area taken shall not exceed 2% of the total area of the roll.
Note: When the number of tests is insufficient, it is allowed to cut samples for additional tests without creating new joints. When the material is supplied in rolls cut into a certain width, if the width is less than the sampling requirement, it is usually required to cut out the sampling area before cutting into a certain width, and then connect the remaining material to the roll. 6.4 It should be protected from sunlight, rain and mechanical damage during transportation. 6.5 The material should be stored at a temperature not exceeding 22℃, a relative humidity not exceeding 50%, and without direct sunlight and other catalysts. From the date of leaving the factory, the performance should be guaranteed to meet the requirements of Article 3.3.1 within a storage period of 90 days. 5
YYKAONYKAa
Glass cloth structure
GB10243—88
Appendix A
Glass cloth materials for bonding sheets
(Supplement)
Glass cloth is a plain woven cloth for electrical use, woven from continuous glass fiber yarn with an alkali metal oxide content not exceeding 0.5%, and treated with a metal bonding agent suitable for epoxy resin.
A2 Glass cloth properties
A2.1 The manufacturer of the bonding sheet should specify the following properties of the glass cloth before impregnation: Nominal thickness
Nominal mass per unit area
Warp and weft density
A2.2 The performance data of the recommended glass cloth are shown in the following table: Nominal thickness
Note: Specifications not listed in the table shall be agreed upon by the supply and demand parties. Additional notes:
Nominal mass per unit area
(g/m2)
This standard was drafted by the 704th Factory of the Ministry of Machinery and Electronics Industry and the Institute of Electronic Standardization. Drafters of this standard: Zhu Hongjiao, Yang Xiuqiong, Tong Xiaoming. Density (root/cm)
Warp and weft
24×20
24×19
16×15
24×25
24×23
From the date of implementation of this standard, the original SJ1803-81 "HABD67 epoxy glass cloth (prepreg)" standard will be invalid. 8
YYKAONTKa3 Test procedure
The thickness of the cured laminate is measured with a micrometer at the middle of each side 510mm away from the edge. 4.5.4 Calculation and results
YYKAONYKCa
GB10243-88
Half of the arithmetic mean of the four measured data is taken as the thickness of the bonding sheet material after lamination. 5 Inspection rules
Agreed by both the supplier and the buyer.
6 Marking, packaging, transportation and storage
6.1 When the bonding sheet material is provided in sheet form, each sheet of bonding sheet material in the packaging bag shall be stacked in the longitudinal direction of the glass cloth and marked in this direction. If it is provided in rolls, the two ends of the roll shall be properly protected. Each bag (roll) shall be sealed and a desiccant shall be placed inside. 6.2 Each package shall be accompanied by a certificate of conformity and shall be marked accordingly with the manufacturer's name, standard number, model, batch number, date of manufacture and the properties of the glass cloth before impregnation (resin content, resin fluidity, gelation time, volatile content), lamination conditions and thickness after lamination, etc. 6.3 When provided in rolls, the adhesive sheet shall also meet the following additional requirements. 6.3.1 For rolls with a width exceeding 800mm, the deviation of the nominal width shall not exceed ±25mm. 6.3.2 For rolls cut to a certain width, the deviation of the nominal width shall not exceed ±3mm. 6.3.3 The deviation of the adhesive sheet material in the roll length shall be less than 1m. 6.3.4 For adhesive sheet materials provided in whole pieces, there shall be no more than 2 joints in any 100m length. For adhesive sheets cut to a certain width, there shall be no more than 5 joints in any 100m length. Note: If the material is supplied in rolls, the sampled area can be completely cut off and the remaining material can be connected to the roll. In this case, it still meets the requirements of Article 6.3.4. This method allows tests to be conducted every 50m.
6.3.5 When the manufacturer takes samples along the width of the adhesive sheet material for quality control tests, the total area taken shall not exceed 2% of the total area of the roll.
Note: When the number of tests is insufficient, it is allowed to cut samples for additional tests without creating new joints. When the material is supplied in rolls cut into a certain width, if the width is less than the sampling requirement, it is usually required to cut out the sampling area before cutting into a certain width, and then connect the remaining material to the roll. 6.4 It should be protected from sunlight, rain and mechanical damage during transportation. 6.5 The material should be stored at a temperature not exceeding 22℃, a relative humidity not exceeding 50%, and without direct sunlight and other catalysts. From the date of leaving the factory, the performance should be guaranteed to meet the requirements of Article 3.3.1 within a storage period of 90 days. 5
YYKAONYKAa
Glass cloth structure
GB10243—88
Appendix A
Glass cloth materials for bonding sheets
(Supplement)
Glass cloth is a plain woven cloth for electrical use, woven from continuous glass fiber yarn with an alkali metal oxide content not exceeding 0.5%, and treated with a metal bonding agent suitable for epoxy resin.
A2 Glass cloth properties
A2.1 The manufacturer of the bonding sheet should specify the following properties of the glass cloth before impregnation: Nominal thickness
Nominal mass per unit area
Warp and weft density
A2.2 The performance data of the recommended glass cloth are shown in the following table: Nominal thickness
Note: Specifications not listed in the table shall be agreed upon by the supply and demand parties. Additional notes:
Nominal mass per unit area
(g/m2)
This standard was drafted by the 704th Factory of the Ministry of Machinery and Electronics Industry and the Institute of Electronic Standardization. Drafters of this standard: Zhu Hongjiao, Yang Xiuqiong, Tong Xiaoming. Density (root/cm)
Warp and weft
24×20
24×19
16×15
24×25
24×23
From the date of implementation of this standard, the original SJ1803-81 "HABD67 epoxy glass cloth (prepreg)" standard will be invalid. 8
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