Anti-doming compositions for a shadow-mask and processes for preparing the same
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United States of America Patent
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Jan 29, 2002
Issued Date -
N/A
app pub date -
Feb 15, 2000
filing date -
Oct 31, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An anti-doming composition including a mixture of electron reflecting material such as bismuth oxide, and a zeolite, and a shadow-mask coated with the composition restrict temperature increase by preventing heat transfer, an anti-doming composition including lead and a ZnO, B.sub.2 O.sub.3, Bi.sub.2 O.sub.3 or a mixture thereof, and a shadow-mask coated with the composition protect mechanical expansion of a shadow-mask, and an anti-doming composition including ferroelectrics such as PZT, PT, PZ or PLZT, and a shadow-mask coated with the composition restrict temperature increase by changing the energy of electron beams into non-thermal energy. The shadow-mask of the present invention reduces about 30 to 50% of the anti-doming ratio and has a low production cost and easiness during processes.
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