发明名称 |
APPARATUS AND METHOD FOR MAKING FREE STANDING DIAMOND |
摘要 |
A mandrel for use in a diamond deposition process has surfaces with different diamond adhesion properties. According to one embodiment, a mandrel is provided and has first and second surfaces on which a diamond film is deposited, with the second surface forming a perimeter around the first surface. The first surface of the mandrel has a first diamond bonding strength which is less than a second diamond bonding strength of the second surface. In an embodiment for forming a cup-shaped diamond film, the mandrel is a titanium nitride (TiN) coated molybdenum (Mo) substrate having a stepped solid cylindrical shape with a central mesa having a side wall or flank. The side wall is etched near the top surface of the mesa to expose a molybdenum band and to form a second surface which bounds the TiN first surface. When the molybdenum band loses efficiency as a result of diamond particles remaining in the molybdenum band after a diamond deposition procedure, a second strip of the TiN coating adjacent to the first strip may be etched or machined to expose a second band of molybdenum. Other embodiments of the invention include machining the molybdenum band on the mesa top surface, machining a stepped molybdenum band, using a separate and detachable molybdenum foil or wire applied to grooves in the mandrel, and forming radial lines or patches on the surface of the mandrel.
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申请公布号 |
CA2167993(A1) |
申请公布日期 |
1996.08.16 |
申请号 |
CA19962167993 |
申请日期 |
1996.01.24 |
申请人 |
SAINT-GOBAIN/NORTON INDUSTRIAL CERAMICS CORPORATION |
发明人 |
FELLBAUM, RANDY D.;ULBRICH, VOLKER R. |
分类号 |
C30B29/04;C04B35/58;C23C16/01;C23C16/26;C23C16/27;(IPC1-7):C30B29/04 |
主分类号 |
C30B29/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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