发明授权
- 专利标题: Noise rejection device and cellular phone including the noise rejection device
- 专利标题(中): 噪声抑制装置和手机包括噪声抑制装置
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申请号: US11240015申请日: 2005-09-29
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公开(公告)号: US07358843B2公开(公告)日: 2008-04-15
- 发明人: Manabu Takayama , Shoichi Tosaka , Ikuo Kakiuchi , Takashige Shiga , Masaru Maeda
- 申请人: Manabu Takayama , Shoichi Tosaka , Ikuo Kakiuchi , Takashige Shiga , Masaru Maeda
- 申请人地址: JP Tokyo
- 专利权人: Taiyo Yuden Co., Ltd.
- 当前专利权人: Taiyo Yuden Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Knobbe Martens Olson & Bear LLP
- 优先权: JP2004-287104 20040930
- 主分类号: H01F5/00
- IPC分类号: H01F5/00
摘要:
A device includes: a pillar-shaped core consisting of a first magnetic insulating material that has two quadric prism segments at both ends thereof symmetrically and has a cylindrical segment, which has an external shape smaller than that of the quadric prism segments, coaxially between the two quadric prism segments; a resistance film that is formed in a substantially uniform thickness so as to cover an outer circumferential face of the pillar-shaped core; a spiral line segment having a predetermined number of circumferences that is formed in a portion present on the cylindrical segment of the resistance film by subjecting a spiral sulcus to laser trimming; an oxide film that is formed to cover at least a surface of a shoulder portion extending from a side to an upper surface of lines constituting the spiral line segment; an armor consisting of a second magnetic insulating material that is formed to cover a surface of the portion present on the cylindrical segment of the resistance film and such that an external shape the armor is a quadric prism shape; and a pair of external electrodes that are formed in a substantially equal thickness so as to cover surfaces of portions present on an end face and four sides of the respective quadric prism segments of the resistance film.