Invention Grant
- Patent Title: Method for fabricating a glass substrate, method for fabricating a magnetic disk, and magnetic disk
- Patent Title (中): 玻璃基板的制造方法，磁盘的制造方法以及磁盘
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Application No.: US11825784Application Date: 2007-07-09
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Publication No.: US08153284B2Publication Date: 2012-04-10
- Inventor: Hideki Kawai
- Applicant: Hideki Kawai
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2006-192952 20060713
- Main IPC: G11B5/62
- IPC: G11B5/62 ; B24B1/00 ; C03C15/00
Abstract:
A method for manufacturing a glass substrate which has a uniform and minute pattern of stripes formed on the surface thereof by ultraprecision polishing, and which allows the recording capacity of a magnetic disk to be increased, includes an inspecting step before the glass substrate is subjected to ultraprecision polishing, whether the Young's modulus Es in topmost part as determined by the nanoindentation method and the Young's modulus Eg as determined by ultrasonic resonance fulfill the inequality 0.8 Eg
Public/Granted literature
- US20080014470A1 Method for fabricating a glass substrate, method for fabricating a magnetic disk, and magnetic disk Public/Granted day:2008-01-17
Information query
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