Invention Application
- Patent Title: PERPENDICULAR MAGNETIC RECORDING MEDIUM
- Patent Title (中): 全能磁记录介质
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Application No.: US12749147Application Date: 2010-03-29
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Publication No.: US20100247963A1Publication Date: 2010-09-30
- Inventor: Kong KIM , Hi SHIN , Tomoko SEKI , Satoshi ISHII
- Applicant: Kong KIM , Hi SHIN , Tomoko SEKI , Satoshi ISHII
- Applicant Address: JP Tokyo SG Singapore
- Assignee: HOYA CORPORATION,HOYA MAGNETICS SINGAPORE PTE. LTD.
- Current Assignee: HOYA CORPORATION,HOYA MAGNETICS SINGAPORE PTE. LTD.
- Current Assignee Address: JP Tokyo SG Singapore
- Priority: JP2009-081885 20090330; JP2010-067388 20100324
- Main IPC: G11B5/33
- IPC: G11B5/33

Abstract:
A perpendicular magnetic recording medium is used for information recording of a perpendicular magnetic recording type. The perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, an underlayer, and a magnetic layer having a multilayered structure including a plurality of magnetic layers. The soft magnetic layer, the underlayer, and the magnetic layer are formed on the substrate. At least one of the magnetic layers includes CoPt magnetic grains containing oxide. The oxide includes at least one material selected from the group consisting of SiO2, TiO2, Cr2O3, Ta2O5, WO3, CoO, and Co3O4.
Public/Granted literature
- US08431257B2 Perpendicular magnetic recording medium Public/Granted day:2013-04-30
Information query
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