Invention Grant
US07675709B2 Magnetic write head having a stair notched, steep shouldered pole and a write gap bump
失效
磁性写头具有阶梯式切口,陡峭的肩部极点和写入间隙凸起
- Patent Title: Magnetic write head having a stair notched, steep shouldered pole and a write gap bump
- Patent Title (中): 磁性写头具有阶梯式切口,陡峭的肩部极点和写入间隙凸起
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Application No.: US11525789Application Date: 2006-09-21
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Publication No.: US07675709B2Publication Date: 2010-03-09
- Inventor: Hung-Chin Guthrie , Wen-Chien David Hsiao , Jyh-Shuey Lo , Aron Pentek
- Applicant: Hung-Chin Guthrie , Wen-Chien David Hsiao , Jyh-Shuey Lo , Aron Pentek
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G11B5/31
- IPC: G11B5/31 ; G11B5/187

Abstract:
A magnetic write head structure that maximizes write field strength while minimizing stray fields. The write pole structure maximizes write field strength by minimizing saturation of the magnetic pole tips, and minimizes stray field writing by preventing magnetic fields from extending laterally from the sides of the magnetic pole. The write head structure includes a write pole having a pole tip configured with a stair notched shape and a steep shouldered base beneath the stair notched portion. This configuration maximizes the amount of flux that can be delivered to the pole tip while also avoiding stray fields. The magnetic pole can also be configured with wing shaped extensions that extend laterally from the pole tip region but which are recessed from the ABS by a desired amount. The magnetic write head structure can be manufactured by forming a magnetic pole with a raised portion, depositing a write gap material over the magnetic pole and then forming a magnetic pedestal over the magnetic pole and write gap, the pedestal having a width significantly smaller than the width of the raised portion of the magnetic pole, a first ion mill can then be performed to notch and trim the magnetic pole. Then a non-magnetic layer such as alumina can be deposited and a second ion mill performed to form a stair notched configuration. An alumina bump can be formed prior to ion milling to provide a mask for forming the laterally extending, recessed wings in the pole tip of the magnetic pole.
Public/Granted literature
- US20080074782A1 Magnetic write head having a stair notched, steep shouldered pole and a write gap bump Public/Granted day:2008-03-27
Information query
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