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ASTM-F144:2005 Edition

ASTM-F144:2005 Edition

$40.63

F144-80(2005) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods

Published By Publication Date Number of Pages
ASTM 2005 5
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1.1 This practice covers the preparation and testing of a reference glass-metal sandwich seal for determining stress in the glass or for determining the degree of thermal expansion (or contraction) mismatch between the glass and metal. Tests are in accordance with Method F218 (Section 2).

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components.

1.3 The practical limit of the test in deriving mismatch is approximately 300 ppm, above which the glass is likely to fracture.

1.4 This standard does not purport to address all of the safety problems, 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Summary of Practice
Significance and Use
Apparatus
2 Materials
Test Specimens
Preparation of Specimens
Procedure for Making the Sandwich Seal
Annealing
Procedure for Measuring Optical Retardation
FIG. 1
FIG. 2
3 Calculations
FIG. 3
4 Report
Keywords
A1. DIRECTIONS FOR CLEANING AND HEAT-TREATING SPECIMENS OF GLASS AND METAL FOR MAKING SEALS
A1.1
A1.2
A1.3
A1.4
A2. SUGGESTED METHODS FOR MAKING SANDWICH SEALS
A2.1
A2.2
A2.3
5 A2.4
A2.5
A2.6
A2.7
FIG. A2.1
FIG. A2.2

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