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ASTM D2739-97(2004)

(Test Method)

Standard Test Method for Volume Resistivity of Conductive Adhesives

Standard Test Method for Volume Resistivity of Conductive Adhesives

SIGNIFICANCE AND USE
Accurate measurement of the volume resistivity of conductive adhesives is important, particularly with respect to applications in electronic packaging techniques. This method measures the resistance of conductive adhesives used in thin films as part of a bonded assembly. This does not imply that the measured results are applicable to different configurations with different metals. This method may be used for acceptance testing and for screening materials.
SCOPE
1.1 This test method covers the determination of the volume resistivity of resin-based conductive adhesives in the cured condition. The test is made on a thin adhesive layer as prepared in a bonded specimen. This test method is used for conductive adhesives that are cured either at room temperature or at elevated temperatures.
1.2 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.3 The values stated in either SI or other units shall be regarded separately as standard. SI equivalents to screw threads are shown in the figures.

General Information

Status
Historical
Publication Date
31-Mar-2004
ICS
83.180 - Adhesives
Technical Committee
D14 - Adhesives
Drafting Committee
D14.80 - Metal Bonding Adhesives
Current Stage
Ref Project

Relations

Replaces
ASTM D2739-97 - Standard Test Method for Volume Resistivity of Conductive Adhesives
Effective Date
01-Apr-2004
Replaced By
ASTM D2739-97(2010) - Standard Test Method for Volume Resistivity of Conductive Adhesives
Effective Date
01-Oct-2010

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ASTM D2739-97(2004) - Standard Test Method for Volume Resistivity of Conductive Adhesives
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2739–97(Reapproved2004)
Standard Test Method for
1
Volume Resistivity of Conductive Adhesives
This standard is issued under the fixed designation D2739; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope opposite faces of a unit cube of liquid. It is the reciprocal of
resistivity. D2864, D27
1.1 Thistestmethodcoversthedeterminationofthevolume
3.1.2 resistivity, volume, n—the ratio of the electric poten-
resistivity of resin-based conductive adhesives in the cured
tialgradienttothecurrentdensitywhenthegradientisparallel
condition.Thetestismadeonathinadhesivelayerasprepared
to the current in the material. D1566, D11
in a bonded specimen. This test method is used for conductive
adhesives that are cured either at room temperature or at
4. Summary of Test Method
elevated temperatures.
4.1 Thevolumeresistivityofadhesivelayerscuredbetween
1.2 This standard does not purport to address the safety
metal adherends is measured on a resistance bridge. Tensile
concerns, if any, associated with its use. It is the responsibility
5
adhesion plugs (Fig. 1) are described in this test method.Any
of the user of this standard to establish appropriate safety and
other test specimens and materials can be used as long as
health practices and determine the applicability of regulatory
similar precautions (see Section 7) are observed regarding
limitations prior to use.
preparation and tolerances.
1.3 The values stated in either SI or other units shall be
regarded separately as standard. SI equivalents to screw
5. Significance and Use
threads are shown in the figures.
5.1 Accurate measurement of the volume resistivity of
2. Referenced Documents conductive adhesives is important, particularly with respect to
2 applications in electronic packaging techniques. This method
2.1 ASTM Standards:
measures the resistance of conductive adhesives used in thin
D618 Practice for Conditioning Plastics for Testing
filmsaspartofabondedassembly.Thisdoesnotimplythatthe
D907 Terminology of Adhesives
measuredresultsareapplicabletodifferentconfigurationswith
2.2 Federal Specification:
3 different metals. This method may be used for acceptance
QQ-B-626 Composition 22
testing and for screening materials.
2.3 ASTM Adjuncts:
4
Assembly Jig
6. Apparatus
6
6.1 Kelvin (Resistance) Bridge,calibratedto1%accuracy.
3. Terminology
6.2 With the agreement of the interested parties, any metal
3.1 Definitions—Manytermsinthistestmethodaredefined
tensile adhesion plugs (Fig. 1) can be used to prepare the
in Terminology D907.
tensile adhesion specimens.
3.1.1 conductivity, n—the ratio of the current density car-
riedthroughaspecimentothepotentialgradientparallelingthe
NOTE 1—Different metals will inherently provide different resistance
current. This is numerically equal to the conductance between values. The measured resistance is dependent on resistance at the
adhesive-adherend interface due to metal oxide formation. The extent of
oxide formation varies with locality and laboratory conditions. Brass,
1
This test method is under the jurisdiction of ASTM Committee D14 on
conforming to Federal Specification QQ-B-626 Composition 22, is a
Adhesives and is the direct responsibility of Subcommittee D14.80 on Metal
convenient metal. However, in order to minimize oxide formation,
Bonding Adhesives.
especiallywheremeasurementsarecritical,asinrefereemeasurements,it
Current edition approved April 1, 2004. Published April 2004. Originally
is recommended that the metal plugs be plated with either gold or silver
approved in 1968. Last previous edition approved in 1997 as D2739–97. DOI:
toathicknessofnotlessthan1µm(0.000040in.).Anysizeplugupto30
10.1520/D2739-97R04.
4
2 mm in diameter can be used with the aid of an alignment jig.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
5
the ASTM website. Plugs to accommodate banana plug—No. 192, Herman H. Smith, Inc., or
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, equivalent.
6
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 Satisfactory resistance bridges are made by: Leads and Northup Co. Bridge
4
Detailed drawings of the assembly jig are available fromASTM International. Catalog No. 4306, Minneapolis Honeywell Division Catalog No. 1622, and Biddle
Request Adjunct No. ADJD2739. Instruments Catalog No. 603282.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United S
...

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SCOPE
1.1 This terminology standard is a compilation of definitions used in the science and technology of the adhesives industry. Terms that are generally understood or adequately defined in other readily available sources are not included.  
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1.2.1 Appendix X1 gives a history of revisions made since 1988. Table X1.1 lists the terms that are affected as: (1) Terms Added, (2) Terms Revised, and (3) Terms Deleted.
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