Invention Grant
- Patent Title: Patterned media bits with cladding shell
- Patent Title (中): 带有外壳的图案化媒体位
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Application No.: US12496505Application Date: 2009-07-01
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Publication No.: US08147995B2Publication Date: 2012-04-03
- Inventor: Haiwen Xi , Kaizhong Gao , Song S. Xue
- Applicant: Haiwen Xi , Kaizhong Gao , Song S. Xue
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Ladas & Parry, LLP
- Main IPC: B44C1/22
- IPC: B44C1/22 ; G11B5/66

Abstract:
A bit patterned media (BPM) includes many magnetic dots arranged in tracks on a substrate. The magnetic dots each have a hard magnetic core, a soft magnetic cladding surrounding the core and a thin non-magnetic layer that separates the hard magnetic core from the soft magnetic ring. The soft magnetic cladding stabilizes the magnetization at the edges of the hard magnetic core to improve the signal to noise ratio of the magnetic dots. The soft magnetic rings also narrow the magnetic field of the dots which reduces the space requirements and allows more dots to be placed on the substrate.
Public/Granted literature
- US20100033872A1 PATTERNED MEDIA BITS WITH CLADDING SHELL Public/Granted day:2010-02-11
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