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Patent Searching and Data


Title:
METHOD FOR RESMOOTHING MAGNETIC DISK
Document Type and Number:
WIPO Patent Application WO/2018/042511
Kind Code:
A1
Abstract:
Provided is a method for resmoothing a magnetic disk to retrieve data recorded on a damaged data disk. The method comprises: a determination step for determining the height of a bulge around the damaged surface of the magnetic disk; a grinding step for grinding the magnetic disk by a grinding amount in accordance with the height of the bulge determined by the determination step; a step for applying a fluorine-based synthetic lubricant to the damaged surface of the magnetic disk and fixing the lubricant thereon; a cleaning step for spraying ethanol and a diluted solution of the fluorine-based synthetic lubricant onto the magnetic disk while rotating the magnetic disk at high speed to spread the ethanol and the diluted solution of the fluorine-based synthetic lubricant over the entire surface of the magnetic disk by centrifugal force while blowing away an excess amount from the circumferential edge of the magnetic disk; and a resmoothing step for repeatedly performing a seek operation that moves a varnish head across the surface of the magnetic disk set on a glide height inspection apparatus, thereby smoothing fine irregularities that remain on the surface of the magnetic disk while removing dust on the magnetic disk.

Inventors:
KUMAGAI Masashi (Tsukiji Square Building 11-6, Tsukiji 3-chom, Chuo-ku Tokyo 45, 〒1040045, JP)
Application Number:
JP2016/075306
Publication Date:
March 08, 2018
Filing Date:
August 30, 2016
Export Citation:
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Assignee:
DIGITAL DATA SOLUTION INC. (Tsukiji Square Building, 11-6 Tsukiji 3-chom, Chuo-ku Tokyo 45, 〒1040045, JP)
International Classes:
G11B23/50; G11B5/84
Foreign References:
JPH0945048A1997-02-14
JPS63148442A1988-06-21
JP2003006938A2003-01-10
JP2008171506A2008-07-24
JP2007004859A2007-01-11
Attorney, Agent or Firm:
TAKEMASA PATENT AGENCY (Mita Daiichi Nagaoka Building 8F, 4-3 Mita 3-chom, Minato-ku Tokyo 73, 〒1080073, JP)
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