Polymethylpentene release sheet method of use
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United States of America Patent
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May 12, 1992
Issued Date -
N/A
app pub date -
Feb 7, 1990
filing date -
Apr 5, 1988
priority date (Note) -
Expired
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Abstract
A release sheet, comprising poly-4-methylpentene-1 film containing a copper salt of an alkanoic acid and at least one of an alkali metal halide and an alkaline earth metal halide, is disclosed. Such film is useful as a release sheet in the manufacture of printed circuit boards.
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