1、Designation: F375 89 (Reapproved 2010)Standard Specification forIntegrated Circuit Lead Frame Material1This standard is issued under the fixed designation F375; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revis
2、ion. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () 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 stamp
3、ing 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 requiremen
4、ts of these materials are covered by otherASTM specifications (specifically Specifications B103/B103M, B122/B122M, B152/B152M, B162, B465, F15, F30,F31, F49 and F68), and these should be consulted for proper-ties and 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 TThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not con
6、sidered standard.2. Referenced Documents2.1 ASTM Standards:2B103/B103M Specification for Phosphor Bronze Plate,Sheet, Strip, and Rolled BarB122/B122M Specification for Copper-Nickel-Tin Alloy,Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled BarB152/B1
7、52M Specification for Copper Sheet, Strip, Plate,and Rolled BarB162 Specification for Nickel Plate, Sheet, and StripB465 Specification for Copper-Iron Alloy Plate, Sheet,Strip, and Rolled BarE112 Test Methods for Determining Average Grain SizeF15 Specification for Iron-Nickel-Cobalt Sealing AlloyF30
8、 Specification for Iron-Nickel Sealing AlloysF31 Specification for 42 % Nickel-6 % Chromium-IronSealing AlloyF49 Specification for Molybdenum Strip for Electron TubesF68 Specification for Oxygen-Free Copper in WroughtForms for Electron Devices3. Ordering Information3.1 Orders for material under this
9、 specification shall includethe following information:3.1.1 Quantity of each 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: co
10、ils and coil size or lengths (see10.1),3.1.6 ASTM designation, referencing 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 mat
11、erials covered by this specification shall con-form to the chemical, physical, 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 spec
12、ification and shall be charac-teristically suitable for fabrication into lead frames by the1This specification is under the jurisdiction of ASTM Committee F01 onElectronics and is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved Oct. 1, 2010. Published N
13、ovember 2010. Originallyapproved in 1973 as F375 73 T. Last previous edition approved in 2005 asF375 89 (2005). DOI: 10.1520/F0375-89R10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
14、nformation, 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.fabricating process to be specified. Any special requirementsrelating to the material properties or the fabri
15、cating process, tobe specified by the user, shall be agreed upon between thesupplier and purchaser.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 otherwi
16、seagreed upon between supplier and purchaser.6. Dimensions and Tolerances6.1 GeneralFor the purposes 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
17、.2 ThicknessThe thickness tolerances shall be thoseshown in Table 1.6.3 WidthThe width of material 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 S
18、traightnessThe maximum edgewise curvature (cam-ber) in any 96-in. (2.44-m) length shall be that shown 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
19、. Measure the maximum distance of the straightedge fromthe edge of the material (curvature is usually 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 de
20、terminant ofsuitability for the intended fabricating process.6.6.1 For flatness for photochemically 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 nego
21、tiatedbetween purchaser and supplier, but in any case the maximumpercent out-of-flatness shall be 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 th
22、ese requirementsresult in coil set, it shall be uniformly in the direction ofcoiling.6.7.1 Coil set 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 sur
23、face and the free hanging end of thestrip that is positioned for maximum distance from the refer-ence 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 met
24、als. These are defined in Test Methods E112.7.2 Grain Size of Annealed TempersThe grain-size re-quirements 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 Ro
25、lled TempersThe grain size of rolledtempers of metals supplied shall be in accordance with thenormal 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 Fi
26、nish is to be 16 in. (0.41 m) rms or less whenmeasured with a profilometer. There shall be no scratches 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 coi
27、l set.11. Certification or Test Reports11.1 Requests for a manufacturers certification that thematerial 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
28、by the manufacturer at the time of shipment.TABLE 1 Thickness TolerancesThickness, in. (mm)Thickness tolerance, 6,in.(mm)forwidthsupto24in.(610 mm), incl0.0040 (0.102) to 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
29、), 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 (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.
30、(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), incl 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,
31、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)F375 89 (2010)212. Packaging, Marking, Shipping, and Preservation12.1 The material shall be separated by size, composition,and temper, and prepared for shipment in such a
32、manner as toensure acceptance by common carrier for transportation at thelowest rate applicable and 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 weig
33、ht, and name of supplier. The specifi-cation number shall be shown when specified.13. Keywords13.1 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 a
34、sserted in connection 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
35、 by the responsible 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 re
36、ceive careful consideration 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 In
37、ternational, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F375 89 (2010)3
