发明授权
- 专利标题: Electrode for electrolytic capacitor
- 专利标题(中): 电解电容器用电极
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申请号: US09549491申请日: 2000-04-14
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公开(公告)号: US06351371B1公开(公告)日: 2002-02-26
- 发明人: Tsunenori Yoshida , Kenji Hoshino , Masakazu Tanahashi , Yoshihiro Higuchi
- 申请人: Tsunenori Yoshida , Kenji Hoshino , Masakazu Tanahashi , Yoshihiro Higuchi
- 优先权: JP11-109246 19990416
- 主分类号: H01G904
- IPC分类号: H01G904
摘要:
An anodic electrode for an electrolytic capacitor having high capacitance with low-resistance properties at high frequencies and capable of carrying large current, and a process of producing the same. Such an anodic electrode for electrolytic capacitor includes a porous body having micropores to be formed with a dielectric layer therein and to be filled with electrolyte therein, wherein the porous body includes a laminate of a plurality of sinter layers having the micropores formed from valve metal particles. The laminate includes multilaminarly smaller micropore-size regions and larger micropore-size regions to form electric conductive passages between the small micropore-size regions and side surfaces of the porous body to reduce resistance of the capacitor and also increase capacitance by utilizing the smaller micropores-size regions for capacitor effectively. The porous body is formed by stacking a plurality of porous preforms such as sheets preformed of valve metal powder into a laminate, and then sintering the laminate. The porous body may be joined with a valve metal substrate during sintering, thereby completing the anodic electrode for an electrolytic capacitor. Particularly, the porous body may be a laminate including large micropore-size sinter layers and small micropore size sinter layers, by alternatively laminating two types of preforms different in density.
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