发明授权
US06603382B1 Inductive element having improved superposed DC current characteristic
失效
具有改善的叠加直流电流特性的感应元件
- 专利标题: Inductive element having improved superposed DC current characteristic
- 专利标题(中): 具有改善的叠加直流电流特性的感应元件
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申请号: US09547639申请日: 2000-04-12
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公开(公告)号: US06603382B1公开(公告)日: 2003-08-05
- 发明人: Eiichi Komai , Yoshito Sasaki , Kazushi Ogawa
- 申请人: Eiichi Komai , Yoshito Sasaki , Kazushi Ogawa
- 优先权: JP11-104842 19990413; JP2000-061778 20000307
- 主分类号: H01F500
- IPC分类号: H01F500
摘要:
A coil layer, and a magnetic layer covering the coil layer via an insulating layer are provided. The magnetic layer comprises at least two magnetic films in lamination. There is adopted an inductive element including a combination of magnetic films in which, for any two magnetic films forming the magnetic layer, the value of product of multiplication of magnetic permeability and thickness of a magnetic film close to the coil layer is smaller than the value of product of multiplication of magnetic permeability and thickness of a magnetic film distant from the coil layer. This inductive element permits improvement of the superposed DC current characteristic and prevention of a decrease in inductance because magnetic fluxes generated from the coil layer are induced to a magnetic film distant from the coil layer.
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