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    ASTM F459 - 13(2018)

    Standard Test Methods for Measuring Pull Strength of Microelectronic Wire Bonds

    Active Standard ASTM F459 | Developed by Subcommittee: F01.03

    Book of Standards Volume: 10.04

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    Significance and Use

    5.1 Failure of microelectronic devices is often due to failure of an interconnection bond. A common type of interconnection bond is a wire bond. These methods can assist in maintaining control of the process of making wire bonds. They can be used to distinguish between weak, nonadherent wire bonds and acceptably strong wire bonds. The methods are destructive.

    5.2 These test methods are appropriate for on-line use for process control, for purchase specifications, and for research in support of improved yield or reliability. The referee method should be used for quantitative comparison of pull strengths of wire bonds.

    1. Scope

    1.1 These test methods cover tests to determine the pull strength of a series of wire bonds. Instructions are provided to modify the methods for use as a referee method. The methods can be used for wire bonds made with wire having a diameter of from 0.0007 to 0.003 in. (18 to 76 μm).

    Note 1: Common usage at the present time considers the term “wire bond” to include the entire interconnection: both welds and the intervening wire span.

    1.2 These test methods can be used only when the loop height of the wire bond is large enough to allow a suitable hook for pulling (see Fig. 1) to be placed under the wire.

    FIG. 1 Suggested Configuration for a Pulling Hook

     Suggested Configuration for a Pulling Hook Suggested Configuration for a Pulling Hook

    1.3 The precision of these methods has been evaluated for aluminum ultra-sonic wedge bonds; however, these methods can be used for gold and copper wedge or ball bonds.2

    1.4 These methods are destructive. They are appropriate for use in process development or, with a proper sampling plan, for process control or quality assurance.

    1.5 A nondestructive procedure is described in Practice F458.

    1.6 The values in SI units are to be regarded as standard.

    1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    F458 Practice for Nondestructive Pull Testing of Wire Bonds

    ICS Code

    ICS Number Code 29.120.20 (Connecting devices)

    UNSPSC Code

    UNSPSC Code 11101705(Aluminum)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F0459-13R18

    Citation Format

    ASTM F459-13(2018), Standard Test Methods for Measuring Pull Strength of Microelectronic Wire Bonds, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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