发明名称 |
A diamond for a wire drawing die, dresser or heat-sink, a process for its manufacture, and a wire drawing die made therefrom. |
摘要 |
A synthetic single crystal diamond for wire drawing die, dresser or heat-sink; the process of manufacturing it and a wire drawing die to utilize it are disclosed. At least one plane of the diamond for wire drawing die is a cleavage plane of (111) faces, and the drawing hole of wire drawing die lies vertical to the cleavage plane. The diamond for the wire drawing die is produced by providing a synthetic single crystal having 20 - 400 ppm nitrogen of Ib type diamond. A groove is made on the diamond surface parallel to (111) faces employing energy beams such as a laser beam, an ion beam and an electron beam. A wedge is struck into the groove to cleave the diamond, and a plate is obtained. Furthermore, the plate is divided into polyhedrons, employing either an energy beam or a blade. The cleavage plane of the polyhedron is almost parallel to the (111) faces of crystal, therefore the cleavage plane is used as the standard plane to build the drawing hole. |
申请公布号 |
EP0391418(B1) |
申请公布日期 |
1995.01.25 |
申请号 |
EP19900106545 |
申请日期 |
1990.04.05 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SATOH, SHUICHI, C/O ITAMI WORKS;TSUJI, KAZUWO, C/O ITAMI WORKS;YOSHIDA, AKITO, C/O ITAMI WORKS;URAKAWA, NOBUO, C/O ITAMI WORKS |
分类号 |
B21C3/02;B28D5/00;C30B33/00;H01L23/373 |
主分类号 |
B21C3/02 |
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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