1、Designation: F 487 88 (Reapproved 2006)Standard Specification forFine Aluminum1 % Silicon Wire for Semiconductor Lead-Bonding1This standard is issued under the fixed designation F 487; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision
2、, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers aluminum1 % silicon alloywire for internal connections in semiconductor devic
3、es and islimited to wire of diameter up to and including 0.0020 in.(0.051 mm). For diameters larger than 0.0020 in. (0.051 mm),the specifications are to be agreed upon between the purchaserand the supplier.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given
4、in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2F16 Test Methods for Measuring Diameter or Thickness ofWire and Ribbon for Electronic Devices and LampsF72 Specification for Gold Wire for Semiconductor LeadBondingF 205 Test Method for Measuring Diameter of Fine Wire
5、byWeighingF 219 Test Methods of Testing Fine Round and Flat Wirefor Electron Devices and LampsF 584 Practice for Visual Inspection of SemiconductorLead-Bonding Wire2.2 Military Standard:3MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes3. Ordering Information3.1 Orders for mat
6、erial under this specification shall includethe following information:3.1.1 Quantity,3.1.2 Size (see Section 5),3.1.3 Breaking load and elongation (see Section 4),3.1.4 Packaging and marking (see Section 11), and3.1.5 Special requirements, such as for certificate of com-pliance (see Section 10).4. P
7、hysical Requirements4.1 Elongation and breaking-load ranges for the wire shallbe specified by the purchaser. The maximum ranges of thesemechanical properties are listed in Table 1.4.2 Mechanical property requirements in ranges smallerthan those listed in Table 1 may be specified upon agreementbetwee
8、n the purchaser and the supplier.NOTE 1The nature of aluminum1 % silicon alloy is such that themechanical properties of both as-drawn and annealed wires overlapconsiderably. It is also possible to alter the properties of hard wire byvarying the manufacturing parameters and procedures. For these reas
9、ons,no distinction is made between the two types of wire in this specification.5. Dimensions, Weights, and Permissible Variations5.1 Wire size shall be expressed in terms of wire diameter indecimal fractions of an inch (or millimetre) or in weight perunit length. Tolerances for various size ranges a
10、re specified inTable 2.5.2 When wire size is expressed in terms of weight, thefollowing values shall be used:5.2.1 Density of Aluminum1 % Silicon2.7 g/cm3.5.2.2 Weight of a 200-mm Length of Wire 0.0254 mm inDiameter0.274 mg.6. Surface Finish6.1 The wire surface shall be clean and free of finger oils
11、,lubricant residues, stains, and particulate matter.6.2 Mechanical damage to the wire surface, such as nicks,scratches, and kinks, shall be held to a minimum.6.3 The inspection shall be carried out under conditionsprescribed in Practice F 584 unless some other inspectionmethod is agreed upon between
12、 the purchaser and the supplier.1This specification is under the jurisdiction of ASTM Committee F01 onElectronics and is the direct responsibility of Subcommittee F01.07 on Intercon-nection Bonding Carrier Bonding.Current edition approved Jan. 1, 2006. Published January 2006. Originallyapproved in 1
13、977. Last previous edition approved in 2001 as F 487 88 (2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM websit
14、e.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.The nature and extent of defects permitted to be pre
15、sent on thesurface of the wire shall be agreed upon between the purchaserand the supplier.7. Chemical Requirements7.1 The alloy composition shall be 1.00 6 0.15 % silicon,and between 98.84 and 99.15 % aluminum. All other elementsare considered impurities.7.2 No single impurity shall exceed 0.0050 %
16、and the totalof all detectable impurities shall not exceed 0.01 %.7.3 Any lower or higher impurity content shall be as agreedupon between the purchaser and the supplier as part of thepurchase contract.8. Sampling8.1 Unless otherwise agreed upon by the purchaser and thesupplier, conformance with Sect
17、ion 4 shall be determined byMIL-STD-105.9. Test Methods9.1 Elongation and Breaking LoadDetermine elongationand breaking load in accordance with Test Methods F 219.9.2 Dimensional MeasurementDetermine the wire diam-eter by one of the following methods:9.2.1 Measure the diameter directly in accordance
18、 with TestMethods F16.9.2.2 Measure the diameter indirectly (by weighing) inaccordance with Test Method F 205.9.2.3 Measure the diameter by optical means agreed uponbetween the purchaser and the supplier.NOTE 2Optical methods for measuring wire diameter are underdevelopment by Committee F-1 on Elect
19、ronics.9.3 Chemical AnalysisVerify that the chemical require-ments are satisfied by means of spectrographic analysis orother means agreed upon between the purchaser and thesupplier.10. Certification10.1 When agreed upon in writing by the purchaser and thesupplier, a certification shall be made the b
20、asis of acceptance ofthe material. This shall consist of a copy of the manufacturerstest report or a statement by the supplier, accompanied by acopy of the test results, that the material has been sampled,tested, and inspected in accordance with the provisions of thisspecification. Each certificatio
21、n so furnished shall be signed byan authorized agent of the supplier or the manufacturer.11. Packaging (Spooling) and Package Marking11.1 The type of spool shall be specified as agreed uponbetween the purchaser and the supplier. (For aging propertiessee the shelf life aging test, in Appendix X1.)NOT
22、E 3Types of spools recommended for fine lead-bonding wire aredescribed in Specification F72.11.2 The maximum and minimum length of wire on a spoolshall be as specified by the purchaser.11.3 The wire shall be wound so that it despools freely andwill be free of kinks and nicks. Spools shall be free of
23、 nicks,burrs, and dents. The beginning and end of the wind shall beclearly identified. The method of termination shall be as agreedupon between the purchaser and the supplier.11.4 The wire shall be protected against damage in normalhandling and shipping. The outer container shall bear markingsindica
24、ting“ fragile” contents and designating the proper end tobe “up” in order to maintain spool axes horizontal duringshipping. The outer container shall also be marked “Extremesof Temperature Must Be Avoided.”NOTE 4Other package marking should be specified by the purchaserif required.11.5 The basic pac
25、king unit shall be legibly marked with thefollowing information:11.5.1 Material description,11.5.2 Diameter, in. (or mm),11.5.3 Length, ft (or m),11.5.4 Elongation and breaking-load specifications,11.5.5 Melt or bar number,11.5.6 Date of packaging,11.5.7 Users part number, and11.5.8 Manufacturers na
26、me and product designation, if any.12. Keywords12.1 silicon aluminum wire; wire bondingTABLE 1 Elongation and Breaking Load of Aluminum1 %Silicon Alloy WireNOTE 1Select the desired nominal breaking load and elongation forthe wire by specifying a range of mechanical properties that includes thedesire
27、d values.ANominal Diameter,in. (mm)Breaking Load, g Elongation, %Min MaxMaxRangeBMin MaxMaxRangeC0.0005 (0.013) 1 5 2 0.5 2.0 1.50.0007 (0.018) 3 12 2 0.5 3.0 2.00.0010 (0.025) 12 22 3 0.5 4.0 2.50.0012 (0.030) 14 30 3 0.5 4.0 2.50.00125 (0.032) 15 32 3 0.5 4.0 3.00.0015 (0.038) 20 50 4 0.5 4.0 3.00
28、.0020 (0.051) 32 90 6 1.0 4.0 3.0AExample: Wire of 0.0010-in. (0.025-mm) diameter with a breaking load of 16 gand an elongation of 2.0 % is desired. Specify a breaking-load range of 14 to 18g(166 2 g) and an elongation range of 1.0 to 3.5 % (2.0 + 1.5 %, 2.0 1.0 %).(NoteSmaller ranges are acceptable
29、; for this example, ranges of 15 to 17 g and1.0 to 3.0 % could be specified. For diameters larger than 0.0020 in. (0.051 mm),the specifications are to be agreed upon between the purchaser and the supplier.)BA range of permissible breaking strength of no more than the number of gramsshown shall be se
30、lected from within the overall range designated by the minimumand maximum values for the given diameter.CA range of permissible elongation of no more than the number of percentagepoints shown shall be selected from within the overall range designated by theminimum and maximum values for the given di
31、ameter.TABLE 2 Dimensional TolerancesNominal Diameter, in. (mm)DiameterTolerance, % ofnominalWeightTolerance, % ofnominal0.0005 to 0.0020 (0.013 to 0.051), incl 6 3 6 6F 487 88 (2006)2APPENDIX(Nonmandatory Information)X1. SHELF LIFE AGING TEST 19831985X1.1 PurposeX1.1.1 To determine the effect of ro
32、om temperature agingon the stress-strain characteristics of bonding wires of severalcompositions and tempers.X1.2 Test parametersX1.2.1 EnvironmentTypical stock room, 73F, 63.X1.2.2 Spooling2-in. diameter, Aluminum, 100 ft/spool.X1.2.3 InstrumentInstron type, 1 in./min., 10 in. length.X1.2.4 Samplin
33、gAverage of five readings per notation.X1.2.5 TimeIntervals shown on charts, see Fig. X1.1.X1.2.6 Wire SizeAll specimens, 0.001 in. diameter.FIG. X1.1 Chart 3 1 % Silicon Aluminum AlloyF 487 88 (2006)3ASTM International takes no position respecting the validity of any patent rights asserted in conne
34、ction with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsi
35、ble technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful co
36、nsideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100
37、 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 487 88 (2006)4
