Invention Grant
- Patent Title: Near field optical head and information recording and reproducing device
- Patent Title (中): 近场光头和信息记录和再现装置
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Application No.: US12733982Application Date: 2008-10-03
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Publication No.: US08050170B2Publication Date: 2011-11-01
- Inventor: Majung Park , Manabu Oumi , Masakazu Hirata
- Applicant: Majung Park , Manabu Oumi , Masakazu Hirata
- Applicant Address: JP
- Assignee: Seiko Instruments Inc.
- Current Assignee: Seiko Instruments Inc.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2007-260566 20071004
- International Application: PCT/JP2008/068024 WO 20081003
- International Announcement: WO2009/044842 WO 20090409
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
A near field optical head includes: a slider provided so as to float from a surface of the magnetic recording medium by a predetermined distance, the slider having a facing surface faced to a surface of the magnetic recording medium; a tipped-shaped near field light generating element formed on the facing surface to have a bottom surface in contact with the facing surface, a top surface formed into a flat surface by cutting a top end of a cone or a pyramid, the flat surface being at a predetermined angle with the bottom surface, and a side surface connecting the bottom surface with the top surface for generating near field light from the top surface; a magnetic pole part formed from a main magnetic pole formed on the side surface and an auxiliary magnetic pole facing the main magnetic pole; a thin film-shaped magnetic circuit connected to the magnetic pole part; and a coil wound around the magnetic circuit.
Public/Granted literature
- US20110007621A1 Near Field Optical Head and Information Recording and Reproducing Device Public/Granted day:2011-01-13
Information query
IPC分类: