H - Electricity – 01 – K
Patent
H - Electricity
01
K
H01K 1/32 (2006.01) C03C 17/34 (2006.01) G02B 5/28 (2006.01) H01J 9/20 (2006.01) H01J 61/35 (2006.01) H01J 61/40 (2006.01)
Patent
CA 2164156
A method for making a tantala/silica interference filter on a vitreous substrate, the filter retaining integrity at temperatures in excess of 600°C, includes the steps of applying to the vitreous substrate a first coating of vitreous silica doped with submicron-sized particles, depositing on the first coating by low pressure chemical vapor deposition the filter which comprises a second coating comprising alternating layers of tantala and silica, and heat treating the substrate and first and second coatings to bond the filter to the substrate. There is further provided an electric lamp having an envelope made in accordance with the above method.
Bandyopadhyay Gautam
Klinedinst Keith A.
Lichtensteiger Silvia E.
Osram Sylvania Inc.
R. William Wray & Associates
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