Invention Application
- Patent Title: Perpendicular Magnetic Recording Medium Having FCC Seed Layers
- Patent Title (中): 具有FCC种子层的垂直磁记录介质
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Application No.: US12793608Application Date: 2010-06-03
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Publication No.: US20100309580A1Publication Date: 2010-12-09
- Inventor: Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamui Tanahashi
- Applicant: Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamui Tanahashi
- Priority: JP2009-138175 20090609
- Main IPC: G11B21/02
- IPC: G11B21/02 ; G11B5/33

Abstract:
According to one embodiment, a perpendicular magnetic recording medium includes at least one soft magnetic underlayer above a substrate, a seed layer above the at least one soft magnetic underlayer, an intermediate layer above the seed layer, a magnetic recording layer above the intermediate layer, and an overcoat layer above the magnetic recording layer, wherein the seed layer includes a second seed layer above a first seed layer. In another embodiment, the seed layer is a multilayered structure of at least two cycles of a unit of layered film which includes a first seed layer and a second seed layer. The first seed layer includes a non-magnetic alloy having a Face-Centered-Cubic (FCC) structure, and the second seed layer includes a soft magnetic alloy having a FCC structure. Other structures are also disclosed, according to more embodiments.
Public/Granted literature
- US08390956B2 Perpendicular magnetic recording medium having FCC seed layers Public/Granted day:2013-03-05
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