发明授权
US5582215A Ceramic die for cutting and shaping lead frames and method of cleaning
the same
失效
用于切割和成型引线框架的陶瓷模具及其清洁方法
- 专利标题: Ceramic die for cutting and shaping lead frames and method of cleaning the same
- 专利标题(中): 用于切割和成型引线框架的陶瓷模具及其清洁方法
-
申请号: US391958申请日: 1995-02-21
-
公开(公告)号: US5582215A公开(公告)日: 1996-12-10
- 发明人: Takehisa Yamamoto , Takao Nishioka , Akira Yamakawa , Matsuo Higuchi
- 申请人: Takehisa Yamamoto , Takao Nishioka , Akira Yamakawa , Matsuo Higuchi
- 申请人地址: JPX
- 专利权人: Sumitomo Electric Industries, Ltd.
- 当前专利权人: Sumitomo Electric Industries, Ltd.
- 当前专利权人地址: JPX
- 优先权: JPX6-053040 19940225; JPX7-007852 19950123
- 主分类号: B21D28/34
- IPC分类号: B21D28/34 ; B08B3/08 ; B21D28/14 ; B21D37/01 ; C04B35/48 ; H01L21/48 ; H01L23/50 ; H05K13/00
摘要:
A ceramic die for cutting and shaping lead frames, in which at least a working section thereof is made of a specific ceramic material having an iron and cobalt content of less than 100 ppm in total. The ceramic die can be formed in a complex shape with a high precision and has a prolonged lifetime because of its superior mechanical properties, such as high wear resistance and high strength, and less probability of adhesion of foreign matter such as solder or the lead frame material thereto. Even if the solder or lead frame material is adhered onto the die, the adhered matter can be removed through a simple procedure in a shortened time. The die is further improved by depositing a hard carbon film onto the surface of the working section.