Invention Grant
- Patent Title: Magnetic recording medium with low temperature seedlayer for high signal-to-noise ratio
- Patent Title (中): 磁记录介质采用低温种子层,信噪比高
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Application No.: US188683Application Date: 1998-11-10
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Publication No.: US6139951APublication Date: 2000-10-31
- Inventor: Qixu Chen , Xing Song , Charles Leu , Rajiv Ranjan
- Applicant: Qixu Chen , Xing Song , Charles Leu , Rajiv Ranjan
- Applicant Address: CA Scotts Valley
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: CA Scotts Valley
- Main IPC: G11B5/73
- IPC: G11B5/73 ; G11B5/84 ; G11B5/66
Abstract:
A magnetic recording medium exhibiting high remanent coercivity and low noise is produced by depositing a first NiAl seedlayer on a non-magnetic substrate, e.g., glass, ceramic or glass-ceramic material, at a relatively low temperature, and subsequently depositing a second NiAl seedlayer on the first seedlayer at a relatively higher temperature. Embodiments include depositing a first NiAl seedlayer at a temperature less than about 120.degree. C., e.g., less than about 100.degree. C., and depositing a second NiAl seedlayer thereon at a temperature greater than about 200.degree. C., e.g. greater than about 230.degree. C. Embodiments also include depositing a Cr-alloy underlayer, CrV, on the second seedlayer.
Public/Granted literature
- US5411726A Process for purifying hydrogen fluoride Public/Granted day:1995-05-02
Information query
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