| 摘要 |
PURPOSE:To permit formation of a titled material to a larger area by forming film-shaped diamond on a base plate material by vapor synthesis method and fixing the outside circumferential part of the film-shaped diamond and a window frame-shaped rigid body, then removing only the base plate material. CONSTITUTION:After the film-shaped diamond 2 is formed on the base plate material by using the vapor synthesis method, the outside circumferential part of the film-shaped diamond and the window frame-shaped rigid body 3 are fixed by using metal solder or adhesive agent; thereafter, only the base plate material is removed by chemical dissolution or physical etching. The optical window material made of the film-shaped diamond consisting of the structure in which the central part consists of a single layer 2 of the film-shaped diamond and the window frame-shaped rigid body 3 encloses the outside circumferential part thereof is thus obtd. The resulted optical window material permits an increase of the area up to about 3-10cm diameter according to the film formable area of the vapor synthesis method adopted for the diamond synthesis thereof.
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