Invention Grant
- Patent Title: Magnetic head and disk device having gap layers with different magnetic relative permeabilities
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Application No.: US15902531Application Date: 2018-02-22
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Publication No.: US10657990B2Publication Date: 2020-05-19
- Inventor: Masaya Ohtake , Akihiko Takeo , Naoyuki Narita , Gaku Koizumi , Yusuke Tomoda , Tomoyuki Maeda
- Applicant: KABUSHIKI KAISHA TOSHIBA , Toshiba Electronic Devices & Storage Corporation
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
- Current Assignee: KABUSHIKI KAISHA TOSHIBA,TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Kim & Stewart LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@31effaba
- Main IPC: G11B5/235
- IPC: G11B5/235 ; G11B5/11 ; G11B5/31 ; G11B5/127 ; G11B5/667
Abstract:
A magnetic head includes a main magnetic pole, a write shield separated from the main magnetic pole by a write gap, a first side shield that is separated from the main magnetic pole by a first side gap, a second side shield that is separated from the main magnetic pole by a second side gap, a first layer that has a first magnetic relative permeability and is disposed in the write gap between the main magnetic pole and the write shield, and a second layer that has a second magnetic relative permeability and is disposed in the first side gap and the second side gap, wherein the first magnetic relative permeability is smaller than the second magnetic relative permeability.
Public/Granted literature
- US20190066717A1 MAGNETIC HEAD AND DISK DEVICE HAVING THE SAME Public/Granted day:2019-02-28
Information query
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