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GB/T8646—1998
This standard is revised on the basis of GB8646--88 and with reference to the American ASTMF487-:88 "Semiconductor Bonding Pliers-1% Silicon Filament".
This standard changes the original standard name "Aluminum Silicon Alloy (AISi1) Wire for Semiconductor Device Bonding" to "Semiconductor Bonding Aluminum-1% Silicon Filament"; the gold medal representation method AISil is changed to A1-1%Si, which is consistent with the American ASTM standard. This standard is written in accordance with the requirements of GB/T1.1-1993 standard, adding "Foreword" and adding "Scope", "Reference Standards" and \Order Form The varieties and specifications in Chapter 1 of the original standard are cancelled according to the provisions of GB/T1.1, and the content of Article 1.1 is incorporated into the fourth chapter "Requirements" of this standard, and the allowable deviation level I is cancelled, which is consistent with the American ASTM standard; Article 1.2 The length of the single end of the wire is cancelled and incorporated into the relevant provisions of Chapter 3 "Order Form Contents" of this standard. This standard adds three grades of 0.018mm, 0.032mm, and 0.045mm in the size classification; the mechanical properties tables 4 and 5 in the original standard are merged into Table 3 of this standard, and some individual data are adjusted to make it more reasonable. This standard reduces the maximum range of breaking force by 1~2g, and the elongation The maximum value has been lowered by 0.5% to 1%, which is consistent with the US ASTM standard.
This standard adds "the surface should be free of notches, pits, scratches, cracks and other defects that reduce mechanical properties that exceed the allowable deviation of the diameter", which is more precise than the original standard.
Based on the original standard, this standard clarifies that the surface quality test shall be carried out in accordance with SJ/T10705-96 "Surface Quality Inspection Method for Semiconductor Device Bonding Wires".
The sampling quantity of this standard changes the "3% of each batch of wires based on the number of axes" stipulated in the original standard to "1% of each batch of wires based on the number of axes", which is consistent with the US ASTM standard.
This standard From the date of entry into force, it will replace GB8646-88. This standard is proposed by China Nonferrous Metals Industry Corporation. This standard is under the jurisdiction of the Standard Metrology Institute of China Nonferrous Metals Industry Corporation. This standard is drafted by Beijing Nonferrous Metals and Rare Earth Application Research Institute. The main drafting units of this standard are: Beijing Nonferrous Metals and Rare Earth Application Research Institute, Tianjin Nonferrous Metals Research Institute. The main drafters of this standard are: Zhao Yueguo, Yang Shunxing, Tao Yufen. This standard was first issued in February 1988.
1 Scope
National Standard of the People's Republic of China
Semiconductor Bonded Aluminum-1% Silicon Filaments
Fine Aluminum-1% silicon wire for semiconductor lend-bonding
GB/T 8646---1998
Replaces GB 8646--88
This standard specifies the requirements, test methods, inspection rules, packaging, marking, transportation and storage of aluminum-1% silicon wire for semiconductor bonding. This standard applies to round drawn A1-1%Si alloy wire for semiconductor bonding. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T191-~90 Packaging, storage and transportation pictorial symbols
GB6987.1~6987.21---86 Chemical analysis methods for aluminum and aluminum alloys GB/T8750-1997 Gold bonding wires for semiconductor devices GB/T10573-89 Tensile test methods for nonferrous metal filaments GB/T15077-94 Geometric dimension measurement methods for precious metals and their alloy materials SI/T10705--96 Surface quality inspection methods for bonding wires for semiconductor devices 3 Order form contents
Any order form (or contract) for materials in accordance with this standard shall include the following contents: a) Material name, brand, state;
b) Required quantity;
c) Dimensions, tolerances and single-end length;
d) Breaking force and elongation;
c) Wire shaft shape and dimensions:
f) Packaging and marking;
g) Special requirements;
h) This standard number and year number.
4 Requirements
4.1 Chemical composition
The chemical composition of the wire shall comply with the provisions of Table 1. Approved by the State Administration of Quality and Technical Supervision on July 15, 1998, and implemented on February 1, 1999
Alloy grade
Al-1%Si
Dimensions and allowable deviations
GB/T8646-1998
Chemical composition of wire
Chemical composition, %
0.85~~1.15
The diameter and allowable deviation of the wire shall conform to the provisions of Table 2. 0.005
Table 2 Diameter and allowable deviation of wire
Nominal diameter
3 Mechanical properties
Allowable deviation
±0.000 6
±0. 000 7
±0,001 0
: 0. 001 0
±0.001 2
Nominal diameter
Not less than
Total of all measurable impurities
Allowable deviation
— 0. 001 4
=0. 001 8
The breaking force and elongation of the wire shall comply with the provisions of Table 3. The range of the breaking force and elongation of the wire shall be determined by the purchaser. Table 3 Breaking force and elongation of wire
Nominal true diameter, mm
0.029(3.0)
0.029(3.0)
0.059(6.0)
0.078(8.0)
0.098(10. 0)
0. 098(10. 0)
0.127(13.0)
0.137(14,0)
0.157(16.0)
0. 225(23. 0)
0. 294(30.0)
0.392(40.0)
0.617(63.0)
Breaking force FN(gf)
0.1 18(12.0)
0.137(14.0)
0.216(22.0)
0.291(30.0)
0. 373(32.0)
0.373(38.0)
0.490(50.0)
0. 617(63.0)
0.764(78.0)
1, 107(113.0)
1. 509(154.0)
1.960(200.0)
3.077(314.0)
Maximum range
Elongation,
Maximum range
Tensile force and elongation should be selected within the range of minimum and maximum values specified in Table 3. For example, if the diameter of the wire is 0.040mm, the breaking force is required to be 0.22N. The elongation is required to be 2%, then the breaking force range is 0.20~~0.24N (0.22N±0.02N) according to Table 3, and the elongation standard is 1.0%-4.0% (2.0%--2.0%, 2.0%-1.0%). 2 If the mechanical property requirements do not match the values listed in Table 3, the supplier and the buyer can reach a consensus on the basis of the current determination. 4.4 Surface quality GB/T 8646-1998 4.4.1 The surface of the wire should be clean, free of oxidation, finger marks, oil stains, mildew, residual lubricant pollution, particle attachment and other contamination. 4.4.2 The surface of the wire should be free of notches, pits, scratches, cracks and other defects that reduce mechanical properties and affect use that exceed the allowable diameter deviation.
5 Test methods
5.1 Chemical composition analysis method
The analysis method of alloy elements shall be carried out in accordance with GB6987.1~～6987.21. 5.2 Mechanical properties test
The mechanical properties test shall be carried out in accordance with the provisions of GB10573: the breaking force and elongation shall be measured in the standard test, the standard length of the tensile specimen is 100mm, and the tensile speed is 2~20mm/min. 5.3 Dimension measurement method
The dimensional measurement method shall be carried out in accordance with the provisions of GB/T15077, and the weighing method shall be used for arbitration. If the size is measured by weighing method. The density of A1-1%Si wire is 2.7g/cm°.
5.4 Surface quality inspection method
Surface quality inspection method is in accordance with SJ/T10705, using an optical binocular microscope for inspection. If necessary, a scanning electron microscope is used to determine the depth of surface defects.
6 Inspection rules
6.1 Inspection and acceptance
The wire material shall be inspected by the supplier's technical supervision department and the product quality shall be guaranteed to meet the requirements of this standard, and a quality certificate shall be filled in. The buyer has the right to conduct a re-inspection according to this standard. If the re-inspection result does not meet the requirements of this standard, the supplier shall be notified within three months from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve the issue. If arbitration is required, a unit recognized by both parties may be entrusted to conduct a re-inspection, and the supplier and buyer shall jointly take samples at the buyer's side. 6.2 Batching
Wire materials shall be submitted for inspection in batches. Each batch shall consist of wire materials of the same diameter, state and furnace number. 6.3 Inspection items
Each batch of wire materials shall be inspected for chemical composition, surface quality, dimensional deviation and mechanical properties. 6.4 Sampling
6.4.1 The chemical composition of the wire is sampled by furnace, and a sample is taken from each furnace for analysis. 6.4.2 1% of the wire in each batch is taken according to the number of shafts (not less than 2 shafts), and 3 samples are taken from each shaft for surface quality, dimensional deviation, and mechanical properties.
6.5 Judgment of test results
6.5.1 If the chemical composition is unqualified, the entire batch (furnace) is unqualified. 6.5.2 For the test of surface quality, dimensional deviation, and mechanical properties, even if one sample is unqualified, double the number of samples should be taken from the batch for repeated testing of the unqualified items. If one sample still fails after repeated tests, the whole batch of wires fails. 7 Packaging, marking, transportation, storage
7.1 Packaging and marking
7.1.1 The shape and size of the wire spool shall be negotiated by the supplier and the buyer and shall be indicated in the order form (or contract). Note: Refer to the recommended sample of gold wire spool for bonding described in GB/T8750. 7.1.2 The length of wire per spool shall be specified by the buyer. 7.1.3 The wire shall be wound neatly on the spool and can be released freely. The start and end of the wire winding shall be clearly identifiable, and the two ends of the wire shall be glued with colored tape. The green one is the start of the release. bZxz.net
7.1.4 The wire spool shall be clean and smooth without scratches, burrs, notches and deformation. is
GB/T 8646
7.1.5 The wire spool shall be placed in a plastic packaging box and sealed with plastic film. The packaging box shall be clean, dry and corrosion-resistant. The outer packaging should have the words "upward", "moisture-proof", "handle with care", "shockproof", etc., and the markings shall be in accordance with the provisions of GB19]. 7.1.6 Each box (shaft) of products should have a label indicating the product name, brand, furnace number (batch number), specifications, mechanical properties, quantity and production month. 7.2 Transportation and storage
7.2.1 During transportation, it should be protected from bumps, scratches, rain, moisture and harsh environments. 7.2.2 Products should be stored in clean, dry, non-corrosive containers. 7.3 Quality certificate
Each batch of products should be accompanied by a quality certificate, which should indicate: a) supplier name and factory address;
b) product name, brand, status;
c) product batch number, specifications, quantity;
d) chemical composition, tensile strength and elongation; e) this standard number and the stamp of the technical supervision department and inspector; f) production date.
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