C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/135
C04B 37/00 (2006.01) H01S 3/03 (2006.01) H01S 3/07 (2006.01)
Patent
CA 1243190
ABSTRACT A ceramic evacuatable enclosure such as a laser body is made by the following process. A first body portion is formed with a channel and a second body portion of the same ceramic material is provided. Mating surfaces are polished on the body portions for bonding together by thermocompression below the ceramic distortion tempera- ture to achieve a vacuum seal. The ceramic may be alumina including 0.2 to 12% by weight of vitreous material. The thermocompression temperature may be in the range 1200°C to 1750°C. Polishing is performed to a finish of from 0.01 µm to 0.15 µm. The body portions may have similar surface formations mutually aligned to provide a folded cavity for an alumina waveguide C02 laser.
449842
Conder Philip C.
Jenkins Richard M.
Redding James R.
Gowling Lafleur Henderson Llp
Qinetiq Limited
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