Filler for a glass-ceramic material comprising CaF.sub.2 granules overcoated with a silicon dioxide film
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United States of America Patent
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Jan 22, 1980
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N/A
app pub date -
Dec 30, 1977
filing date -
Dec 30, 1977
priority date (Note) -
Expired
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Abstract
A granular filler for a glass-ceramic material, particularly low-melting solder glass for encapsulating semiconductors is provided by coating grains of a filler material with an oxide film that interacts with the glass-ceramic material at temperatures below 400.degree. C.
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