ASTM F375-89(2010)

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/B152M, B162, B465, F15, F30, F31,  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 TThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 30-Sep-2010
• 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(2005) - Standard Specification for Integrated Circuit Lead Frame Material
• Effective Date: 01-Oct-2010
• Replaced By: ASTM F375-89(2015) - Standard Specification for Integrated Circuit Lead Frame Material
• Effective Date: 01-Jul-2015

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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(Reapproved2010)
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 E112 Test Methods for Determining Average Grain Size
F15 Specification for Iron-Nickel-Cobalt Sealing Alloy
1.1 This specification covers the special requirements for
F30 Specification for Iron-Nickel Sealing Alloys
metalstriptobeusedtofabricateintegrated-circuitleadframes
F31 Specificationfor42a??%Nickel-6a??%Chromium-Iron
by stamping or photochemical milling.
Sealing Alloy
1.2 The metals that are applicable to these parts include
F49 Specification for Molybdenum Strip for Electron Tubes
copper and copper alloys, ferrous alloys usually containing 3
(Withdrawn 1978)
nickel or cobalt or chromium, nickel and nickel alloys, and
F68 Specification for Oxygen-Free Copper in Wrought
other metallic materials.
Forms for Electron Devices
1.3 The general chemical, physical, and mechanical prop-
erty requirements of these materials are covered by other 3. Ordering Information
ASTM specifications (specifically Specifications B103/
3.1 Orders for material under this specification shall include
B103M, B122/B122M, B152/B152M, B162, B465, F15, F30,
the following information:
F31, F49 and F68), and these should be consulted for proper-
3.1.1 Quantity of each size,
ties and tempers that are different for the different metals. For
3.1.2 Material and specification number appropriate to the
metals for which no ASTM specification is available, other
material (see 2.1),
specifications should be adopted by agreement of the parties
3.1.3 Temper or mechanical properties (see 4.1),
concerned.
3.1.4 Dimensions:thickness,width,lengthifapplicable(see
1.4 TThe values stated in inch-pound units are to be 6.2-6.4),
regarded as standard. The values given in parentheses are 3.1.5 How furnished: coils and coil size or lengths (see
mathematical conversions to SI units that are provided for 10.1),
3.1.6 ASTM designation, referencing this specification
information only and are not considered standard.
number, and the fabricating process to be used,
2. Referenced Documents
3.1.7 Certificationortestreportrequirements(see11.1),and
2.1 ASTM Standards:
3.1.8 Packing and marking requirements (see 12.1 and
B103/B103M Specification for Phosphor Bronze Plate,
12.2).
Sheet, Strip, and Rolled Bar
B122/B122M Specification for Copper-Nickel-Tin Alloy,
4. Materials and Manufacture
Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-
4.1 The materials covered by this specification shall con-
Nickel Alloy Plate, Sheet, Strip, and Rolled Bar
form to the chemical, physical, and mechanical property
B152/B152M Specification for Copper Sheet, Strip, Plate,
requirements prescribed in the material specification covering
and Rolled Bar
the metal or alloy and the temper (see 2.1).
B162 Specification for Nickel Plate, Sheet, and Strip
4.2 The material shall conform to the requirements for lead
B465 SpecificationforCopper-IronAlloyPlate,Sheet,Strip,
frames as prescribed in this specification and shall be charac-
and Rolled Bar
teristically suitable for fabrication into lead frames by the
fabricating process to be specified. Any special requirements
This specification is under the jurisdiction of ASTM Committee F01 on
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
relating to the material properties or the fabricating process, to
Materials.
be specified by the user, shall be agreed upon between the
Current edition approved Oct. 1, 2010. Published November 2010. Originally
supplier and purchaser.
approved in 1973 as F375 – 73 T. Last previous edition approved in 2005 as
F375 – 89 (2005). DOI: 10.1520/F0375-89R10.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced in
the ASTM website. www.astm.org.
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F375−89(2010)
TABLE 2 Width Tolerances
5. Chemical Composition
Width tolerances, ±, 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
2.000 (50.80) and under 0.003 (0.07)
agreed upon between supplier and purchaser.
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—For the purposes of determining conformance
with the dimensional requirements prescribed in this specifi-
TABLE 3 Straightness (Camber) Tolerances
cation, any measured value outside the specified limiting
Tolerance Per Unit Length of Any
values for any dimension shall be cause for rejection.
Specified Width, in. (mm)
96-in. (2.44-m) Length, in. (mm)
6.2 Thickness—The thickness tolerances shall be those
1 1
Up to 1 ⁄2 (38.1), incl ⁄2 (12.7)
1 1
Over 1 ⁄2 (38.1) ⁄4 (6.3)
shown in Table 1.
6.3 Width—The width of material shall conform to toler-
ances shown in Table 2.
6.4 Length—The length tolerances shall b
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