Invention Grant
- Patent Title: Perpendicular magnetic recording disk with patterned template layer
- Patent Title (中): 具有图案化模板层的垂直磁记录盘
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Application No.: US14530469Application Date: 2014-10-31
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Publication No.: US09431046B2Publication Date: 2016-08-30
- Inventor: Hitesh Arora , Andrea Fasoli , Qing Zhu
- Applicant: HGST Netherlands B.V.
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agent Thomas R. Berthold
- Main IPC: G11B5/708
- IPC: G11B5/708 ; G11B5/73 ; G11B5/64 ; G11B5/82

Abstract:
A perpendicular magnetic recording (PMR) disk has a patterned template layer for the growth of the magnetic grains and the nonmagnetic material surrounding the grains. The template layer is a substantially planar platinum (Pt) or palladium (Pd) layer that is patterned to have Pt or Pd regions arranged in a hexagonal-close-packed (hcp) pattern with the Pt or Pd regions surrounded by Pt-oxide or Pd-oxide regions. The two separate regions of the template layer have different surface chemistries and energies, which provide a “chemical contrast” to impinging atoms during deposition of the metallic magnetic material and nonmagnetic (typically oxide) material, effectively guiding the deposition. The metallic magnetic material is preferentially deposited on the pristine, epitaxial Pt or Pd regions to form the magnetic grains, while the oxide migrates to the oxidized Pt or Pd regions due to the matching of lower surface energy.
Public/Granted literature
- US20160125904A1 PERPENDICULAR MAGNETIC RECORDING DISK WITH PATTERNED TEMPLATE LAYER Public/Granted day:2016-05-05
Information query
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