ASTM F375-89(2005)

Standard Specification for Integrated Circuit Lead Frame Material

ABSTRACT
This specification covers the special requirements for a metal strip used in the fabrication of integrated-circuit lead frames by stamping or photochemical milling. The metal strip shall be manufactured from copper and copper alloys, ferrous alloys containing nickel, cobalt, or chromium, nickel and nickel alloys, or other metallic materials and shall conform to the chemical, physical, and mechanical property requirements specified, including the limitation on the severity and number of inclusions, the surface finish, and the coil size. Tests for straightness, flatness, coil set, and grain size shall be performed and shall conform to the requirements specified.
SCOPE
1.1 This specification covers the special requirements for metal strip to be used to fabricate integrated-circuit lead frames by stamping or photochemical milling.  
1.2 The metals that are applicable to these parts include copper and copper alloys, ferrous alloys usually containing nickel or cobalt or chromium, nickel and nickel alloys, and other metallic materials.  
1.3 The general chemical, physical, and mechanical property requirements of these materials are covered by other ASTM specifications (specifically Specifications B103/ B103M, B122/B122M, B152, B162, B465, F15, F30, F31, F49 and F68), and these should be consulted for properties and tempers that are different for the different metals. For metals for which no ASTM specification is available, other specifications should be adopted by agreement of the parties concerned.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 31-Dec-2004
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F375-89(1999) - Standard Specification for Integrated Circuit Lead Frame Material
• Effective Date: 01-Jan-2005
• Replaced By: ASTM F375-89(2010) - Standard Specification for Integrated Circuit Lead Frame Material
• Effective Date: 01-Oct-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F375 – 89 (Reapproved 2005)
Standard Specification for
Integrated Circuit Lead Frame Material
ThisstandardisissuedunderthefixeddesignationF375;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope B465 Specification for Copper-Iron Alloy Plate, Sheet,
Strip, and Rolled Bar
1.1 This specification covers the special requirements for
E112 Test Methods for Determining Average Grain Size
metalstriptobeusedtofabricateintegrated-circuitleadframes
F15 Specification for Iron-Nickel-Cobalt Sealing Alloy
by stamping or photochemical milling.
F30 Specification for Iron-Nickel Sealing Alloys
1.2 The metals that are applicable to these parts include
F31 Specification for 42 % Nickel-6 % Chromium-Iron
copper and copper alloys, ferrous alloys usually containing
Sealing Alloy
nickel or cobalt or chromium, nickel and nickel alloys, and
F49 Specification for Molybdenum Strip for ElectronTubes
other metallic materials.
F68 Specification for Oxygen-Free Copper in Wrought
1.3 The general chemical, physical, and mechanical prop-
Forms for Electron Devices
erty requirements of these materials are covered by other
ASTM specifications (specifically Specifications B103/
3. Ordering Information
B103M, B122/B122M, B152/B152M, B162, B465, F15, F30,
3.1 Orders for material under this specification shall include
F31, F49 and F68), and these should be consulted for proper-
the following information:
ties and tempers that are different for the different metals. For
3.1.1 Quantity of each size,
metals for which no ASTM specification is available, other
3.1.2 Material and specification number appropriate to the
specifications should be adopted by agreement of the parties
material (see 2.1),
concerned.
3.1.3 Temper or mechanical properties (see 4.1),
1.4 The values stated in inch-pound units are to be regarded
3.1.4 Dimensions:thickness,width,lengthifapplicable(see
as the standard. The values given in parentheses are for
6.2-6.4),
information only.
3.1.5 How furnished: coils and coil size or lengths (see
2. Referenced Documents 10.1),
3.1.6 ASTM designation, referencing this specification
2.1 ASTM Standards:
number, and the fabricating process to be used,
B103/B103M Specification for Phosphor Bronze Plate,
3.1.7 Certificationortestreportrequirements(see11.1),and
Sheet, Strip, and Rolled Bar
3.1.8 Packing and marking requirements (see 12.1 and
B122/B122M Specification for Copper-Nickel-Tin Alloy,
12.2).
Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-
Nickel Alloy Plate, Sheet, Strip, and Rolled Bar
4. Materials and Manufacture
B152/B152M Specification for Copper Sheet, Strip, Plate,
4.1 The materials covered by this specification shall con-
and Rolled Bar
form to the chemical, physical, and mechanical property
B162 Specification for Nickel Plate, Sheet, and Strip
requirements prescribed in the material specification covering
the metal or alloy and the temper (see 2.1).
This specification is under the jurisdiction of ASTM Committee F01 on
4.2 The material shall conform to the requirements for lead
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
frames as prescribed in this specification and shall be charac-
Materials.
teristically suitable for fabrication into lead frames by the
Current edition approved Jan. 1, 2005. Published January 2005. Originally
approved in 1973 as F375 – 73 T. Last previous edition approved in 1999 as fabricating process to be specified. Any special requirements
F375 – 89 (1999). DOI: 10.1520/F0375-89R05.
relating to the material properties or the fabricating process, to
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
be specified by the user, shall be agreed upon between the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
supplier and purchaser.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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F375 – 89 (2005)
TABLE 2 Width Tolerances
5. Chemical Composition
Width tolerances, 6, in. (mm)
5.1 The material shall conform to the requirements as to
for thickness in the range
Width, in. (mm)
chemical composition specified for flat products in the ASTM
0.004 in. (0.10 mm) to
0.030 in. (0.76 mm), incl
specification for the metal or alloy specified, unless otherwise
agreed upon between supplier and purchaser.
2.000 (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)
6. Dimensions and Tolerances
Over 12.000 (304.80) to 24.000 (609.60), incl 0.016 (0.40)
6.1 General—Forthepurposesofdeterminingconformance
with the dimensional requirements prescribed in this specifi-
TABLE 3 Straightness (Camber) Tolerances
cation, any measured value outside the specified limiting
values for any dimension shall be cause for rejection. Tolerance Per Unit Length of Any
Specified Width, in. (mm)
96-in. (2.44-m) Length, in. (mm)
6.2 Thickness—The thickness tolerances shall be those
Upto11 2 (38.1), incl 1 2 (12.7)
/ /
shown in Table 1.
Over 1 1 2 (38.1) 1 4 (6.3)
/ /
6.3 Width—The width of material shall conform to toler-
ances shown in Table 2.
6.4 Length—The length tolerances shall be those shown in
between the reference surface and the free hanging end of the
the appropri
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