Invention Grant
- Patent Title: Perpendicular magnetic recording head having a main pole and first and second magnetic films peripheral to the main pole and having different depths from an air bearing surface
- Patent Title (中): 垂直磁记录头具有主极和在主极周围的第一和第二磁膜,并且具有与空气支承表面不同的深度
-
Application No.: US12638911Application Date: 2009-12-15
-
Publication No.: US08351156B2Publication Date: 2013-01-08
- Inventor: Kazue Kudo , Hiromi Shiina , Yohji Maruyama , Tetsuya Okai , Gen Oikawa , Shouji Tokutake
- Applicant: Kazue Kudo , Hiromi Shiina , Yohji Maruyama , Tetsuya Okai , Gen Oikawa , Shouji Tokutake
- 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
- Priority: JP2008-322966 20081218
- Main IPC: G11B5/127
- IPC: G11B5/127 ; G11B5/187

Abstract:
A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the depths of the first magnetic films from an air bearing surface are smaller than the depth of the second magnetic film from the air bearing surface at least at a periphery of the main pole. A perpendicular magnetic recording head according to another embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the main pole and the first magnetic films have respective tapered portions whose thicknesses become larger toward the side opposite to an air bearing surface, and the tapered portions are in contact with the second magnetic film. Additional embodiments are also presented.
Public/Granted literature
- US20100157476A1 PERPENDICULAR MAGNETIC RECORDING HEAD Public/Granted day:2010-06-24
Information query
IPC分类: