Invention Grant
- Patent Title: Dual cap layers for heat-assisted magnetic recording media
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Application No.: US15389432Application Date: 2016-12-22
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Publication No.: US09886977B1Publication Date: 2018-02-06
- Inventor: Oleg Mryasov , Alan Kalitsov , Hoan Ho , Paul Dorsey , Gerardo Bertero
- Applicant: Western Digital Technologies, Inc. , Western Digital Technologies, Inc.
- Applicant Address: US CA Irvine
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA Irvine
- Agent John D. Henkhaus
- Main IPC: G11B5/72
- IPC: G11B5/72 ; G11B5/667 ; G11B5/725 ; G11B5/65 ; G11B5/851 ; G11B5/00

Abstract:
A recording medium having improved signal-to-noise ratio (SNR) capabilities includes dual cap layers over the recording layer, where the Curie temperature of the first cap layer over the recording layer is greater than the Curie temperature of the recording layer, and the Curie temperature of the second cap layer over the first cap layer is greater than the Curie temperature of the first cap layer. The first cap layer may be composed of a magnetically hard material, such as L10 CoPt, where the second cap layer may be composed of a magnetically soft material, such as Co. Such a medium is particularly useful in the context of heat-assisted magnetic recording (HAMR).
Information query
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