发明授权
- 专利标题: Near-field light head and information recording/reproducing device
- 专利标题(中): 近场光头和信息记录/再现装置
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申请号: US12668076申请日: 2008-07-10
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公开(公告)号: US08842504B2公开(公告)日: 2014-09-23
- 发明人: Masakazu Hirata , Manabu Oumi , Majung Park
- 申请人: Masakazu Hirata , Manabu Oumi , Majung Park
- 申请人地址: JP Chiba-Shi
- 专利权人: Seiko Instruments Inc.
- 当前专利权人: Seiko Instruments Inc.
- 当前专利权人地址: JP Chiba-Shi
- 代理机构: Grossman, Tucker, Perreault & Pfleger, PLLC
- 优先权: JP2007-181037 20070710
- 国际申请: PCT/JP2008/062525 WO 20080710
- 国际公布: WO2009/008488 WO 20090115
- 主分类号: G11B5/02
- IPC分类号: G11B5/02 ; G11B5/60 ; G11B5/48 ; G11B5/31 ; G11B5/00
摘要:
A near-field light head of the present invention includes: a slider disposed opposite to a surface of the magnetic recording medium; a recording element that includes a main magnetic pole generating the recording magnetic field and a subsidiary magnetic pole, the recording element being fixed to an apical surface of the slider so that the main magnetic pole and the subsidiary magnetic pole line up in a longitudinal direction of the slider in the state where the subsidiary magnetic pole is located at the apical surface of the slider; a near-field light generating element, fixed adjacently to the main magnetic pole in a state where another end side thereof is directed to the magnetic recording medium, that propagates the light flux introduced from one end side thereof toward the other end side to generate the near-field light, and radiates the near-field light from the other end side to the outside; and a light flux introducing device, fixed to the slider, that introduces the light flux from the one end side into the near-field light generating element. The near-field light generating element includes an inclined surface, which is inclined with respect to an optical axis of the light flux propagated through the inside thereof and is opposite to the main magnetic pole, in the other end side. A metallic film that increases light intensity of the near-field light to be increased is formed in the inclined surface.