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  • ASTM
    F140-98(2008) Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
    Edition: 2008
    $144.00
    Unlimited Users per year

Description of ASTM-F140 2008

ASTM F140 - 98(2008)

Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods

Active Standard ASTM F140 | Developed by Subcommittee: C14.04

Book of Standards Volume: 15.02




ASTM F140

Significance and Use

The term reference as employed in this practice implies that either the glass or the metal of the reference glass-metal seal will be a standard reference material such as those supplied for other physical tests by the National Institute for Standards and Technology (NIST), or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material. Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser.

1. Scope

1.1 This practice covers the preparation and testing of reference glass-metal butt seals of two general configurations: one applicable to determining stress in the glass and the other to determining the degree of mismatch of thermal expansion (or contraction). Tests are in accordance with Test Method F 218 (Section 1.1).

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components. It should not be attempted with glass-metal combinations having widely divergent thermal expansion (or contraction) properties.


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

F47 Test Method for Crystallographic Perfection of Silicon by Preferential Etch Techniques

F79 Specification for Type 101 Sealing Glass

F105 Specification for Type 58 Borosilicate Sealing Glass

F218 Test Method for Measuring Optical Retardation and Analyzing Stress in Glass


Keywords

expansion mismatch; glass-metal seals; Seals--electronic applications; Specimen preparation (for testing)--semiconductor materials; Thermal expansion/contraction; Butt seals; Electronic materials/applications; Glass electronic seals; Metal electronic components/devices ;


ICS Code

ICS Number Code 21.140 (Seals, glands)


DOI: 10.1520/F0140-98R08

ASTM International is a member of CrossRef.

ASTM F140



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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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