1、Designation: F 375 89 (Reapproved 2005)Standard Specification forIntegrated Circuit Lead Frame Material1This standard is issued under the fixed designation F 375; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. 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 the special requirements formetal strip to be used to fabricate integrated-circuit lead framesby st
3、amping or photochemical milling.1.2 The metals that are applicable to these parts includecopper and copper alloys, ferrous alloys usually containingnickel or cobalt or chromium, nickel and nickel alloys, andother metallic materials.1.3 The general chemical, physical, and mechanical prop-erty require
4、ments of these materials are covered by otherASTM specifications (specifically Specifications B 103/B103M, B 122/B 122M, B 152, B 162, B 465, F15, F30, F31,F49and F68), and these should be consulted for propertiesand tempers that are different for the different metals. Formetals for which no ASTM sp
5、ecification is available, otherspecifications should be adopted by agreement of the partiesconcerned.1.4 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2B 103/B 103M Specificat
6、ion for Phosphor Bronze Plate,Sheet, Strip, and Rolled BarB 122/B 122M Specification for Copper-Nickel-Tin Alloy,Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled BarB 152 Specification for Copper Sheet, Strip, Plate, andRolled BarB 162 Specification f
7、or Nickel Plate, Sheet, and StripB 465 Specification for Copper-Iron Alloy Plate, Sheet,Strip, and Rolled BarE112 Test Methods for Determining theAverage Grain SizeF15Specification for Iron-Nickel-Cobalt Sealing AlloyF30Specification for Iron-Nickel Sealing AlloysF31Specification for 42 Percent Nick
8、el-6 PercentChromium-Iron Sealing AlloyF49Specification for Molybdenum Strip for ElectronTubesF68Specification for Oxygen-Free Copper in WroughtForms for Electron Devices3. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of e
9、ach size,3.1.2 Material and specification number appropriate to thematerial (see 2.1),3.1.3 Temper or mechanical properties (see 4.1),3.1.4 Dimensions: thickness, width, length if applicable (see6.2-6.4),3.1.5 How furnished: coils and coil size or lengths (see10.1),3.1.6 ASTM designation, referencin
10、g this specificationnumber, and the fabricating process to be used,3.1.7 Certification or test report requirements (see 11.1), and3.1.8 Packing and marking requirements (see 12.1 and12.2).4. Materials and Manufacture4.1 The materials covered by this specification shall con-form to the chemical, phys
11、ical, and mechanical propertyrequirements prescribed in the material specification coveringthe metal or alloy and the temper (see 2.1).4.2 The material shall conform to the requirements for leadframes as prescribed in this specification and shall be charac-teristically suitable for fabrication into
12、lead frames by thefabricating process to be specified. Any special requirementsrelating to the material properties or the fabricating process, tobe specified by the user, shall be agreed upon between thesupplier and purchaser.1This specification is under the jurisdiction of ASTM Committee F01 onElec
13、tronics and is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved Jan. 1, 2005. Published January 2005. Originallyapproved in 1973 as F 375 73 T. Last previous edition approved in 1999 asF 375 89 (1999).2For referenced ASTM standards, visit the ASTM websit
14、e, 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 website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States
15、.5. Chemical Composition5.1 The material shall conform to the requirements as tochemical composition specified for flat products in the ASTMspecification for the metal or alloy specified, unless otherwiseagreed upon between supplier and purchaser.6. Dimensions and Tolerances6.1 GeneralFor the purpos
16、es of determining conformancewith the dimensional requirements prescribed in this specifi-cation, any measured value outside the specified limitingvalues for any dimension shall be cause for rejection.6.2 ThicknessThe thickness tolerances shall be thoseshown in Table 1.6.3 WidthThe width of material
17、 shall conform to toler-ances shown in Table 2.6.4 LengthThe length tolerances shall be those shown inthe appropriate table for flat products in the ASTM specifica-tion covering the metal or alloy.6.5 StraightnessThe maximum edgewise curvature (cam-ber) in any 96-in. (2.44-m) length shall be that sh
18、own in Table3.6.5.1 Test MethodCut a length greater than 96 in. (2.44m), representative of the material, and lay it on a flat surface.Place an 8-ft long straightedge against the concave edge of thestrip. Measure the maximum distance of the straightedge fromthe edge of the material (curvature is usua
19、lly uniform and thepoint of maximum departure will usually be equidistant fromthe ends of the straightedge).6.6 FlatnessDepending upon the method of manufactureof lead frames, flatness may be a major determinant ofsuitability for the intended fabricating process.6.6.1 For flatness for photochemicall
20、y milled lead frames,strip shall be free of waves, buckles, undulations, and ripples tothe extent that special flattening operations may be required,and agreement of flatness requirements should be negotiatedbetween purchaser and supplier, but in any case the maximumpercent out-of-flatness shall be
21、not over 5 % as defined inparagraph 6.1.1.3 of the Dimensions and Tolerances Section ofSpecification F49.6.7 Coil SetThis is dependent on alloy, temper, and coildiameter, and where the combination of these requirementsresult in coil set, it shall be uniformly in the direction ofcoiling.6.7.1 Coil se
22、t shall not exceed 1.5 in. (38 mm) in a 36-in.(0.91-m) length.6.7.2 Test MethodCut a 36-in. (0.91-m) length and holdone end against a flat vertical surface. Measure the distancebetween the reference surface and the free hanging end of thestrip that is positioned for maximum distance from the refer-e
23、nce surface.6.8 Edge Burrs are undesirable and, if present, their heightshall not exceed 10 % of the metal thickness.7. Grain Size7.1 Methods of measuring and indicating grain size vary fordifferent metals. These are defined in Test Methods E112.7.2 Grain Size of Annealed TempersThe grain-size re-qu
24、irements for annealed tempers are covered by the specifica-tion covering the metal, and the particular grain-size require-ment shall be as agreed upon between purchaser and supplier.7.3 Grain Size of Rolled TempersThe grain size of rolledtempers of metals supplied shall be in accordance with thenorm
25、al mill practice for the metal unless otherwise specified.8. Inclusions8.1 A limitation on the severity and number of inclusionsshall be negotiated between purchaser and supplier.9. Surface Finish9.1 Finish is to be 16 in. (0.41 m) rms or less whenmeasured with a profilometer. There shall be no scra
26、tches over0.001 in. (0.025 mm) deep.10. Coil Size10.1 Unless otherwise specified, coils shall be supplied withan inside diameter that provides for good packing practicewithout resulting in excessive coil set.11. Certification or Test Reports11.1 Requests for a manufacturers certification that themat
27、erial was manufactured in accordance with this specifica-tion or a report of the test results or both, if required, shall bemade at the time of order entry or contract agreement. Theyshall be furnished by the manufacturer at the time of shipment.12. Packaging, Marking, Shipping, and Preservation12.1
28、 The material shall be separated by size, composition,and temper, and prepared for shipment in such a manner as toensure acceptance by common carrier for transportation at theTABLE 1 Thickness TolerancesThickness, in. (mm)Thickness tolerance, 6,in.(mm)forwidthsupto24in.(610 mm), incl0.0040 (0.102) t
29、o 0.0060 (0.152), incl 0.0003 (0.007)Over 0.0060 (0.152) to 0.0090 (0.229), incl 0.0004 (0.010)Over 0.0090 (0.229) to 0.0130 (0.330), incl 0.0006 (0.015)Over 0.0130 (0.330) to 0.0170 (0.432), incl 0.0008 (0.020)Over 0.0170 (0.432) to 0.0210 (0.533), incl 0.0009 (0.022)Over 0.0210 (0.533) to 0.0300 (
30、0.762), incl 0.0010 (0.025)TABLE 2 Width TolerancesWidth, in. (mm)Width tolerances, 6, in. (mm)for thickness in the range0.004 in. (0.10 mm) to0.030 in. (0.76 mm), incl2.000 (50.80) and under 0.003 (0.07)Over 2.000 (50.80) to 6.000 (152.40), incl 0.005 (0.12)Over 6.000 (152.40) to 12.000 (304.80), i
31、ncl 0.010 (0.25)Over 12.000 (304.80) to 24.000 (609.60), incl 0.016 (0.40)TABLE 3 Straightness (Camber) TolerancesSpecified Width, in. (mm)Tolerance Per Unit Length of Any96-in. (2.44-m) Length, in. (mm)Upto11/2 (38.1), inclOver 1 1/2 (38.1)1/2 (12.7)1/4 (6.3)F 375 89 (2005)2lowest rate applicable a
32、nd to afford protection from the normalhazards of transportation.12.2 Each shipping unit shall be legibly marked with thepurchase order number, metal or alloy designation, temper,size, gross and net weight, and name of supplier. The specifi-cation number shall be shown when specified.13. Keywords13.
33、1 copper alloys; iron-nickel alloys; iron-nickelchromiumalloy; iron-nickel-cobalt alloys; lead frame material;molybdenumASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are express
34、ly 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 responsible technical committee and must be reviewed every five years andif not revised,
35、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 consideration at a meeting of theresponsible technical committee, which you may att
36、end. 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 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 375 89 (2005)3
