Method for supporting manufacture of a magnetic disk

Details Method for supporting manufacture of a magnetic disk Method for supporting manufacture of a magnetic disk

2008-01-15

2011-10-11

Kim, Paul D (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603040, C029S603060, C029S603090, C360S031000, C360S053000, C360S135000

Reexamination Certificate

active

08033008

ABSTRACT:
A defect inspection is performed for each of glass substrates by a surface defect detector. The distance from the center of the glass substrate to a detected defect, as a radius of a nonmagnetic region to be formed circular, is recorded along with an ID assigned to the glass substrate. Such defect information is recorded in a defect list using a printer or recorded in an RFID tag using an RFID writer. The defect list or the RFID tag is attached to a glass-substrate case. Each glass substrate and its defect information are in one-to-one correspondence and are provided to a customer as a magnetic disk manufacturer. Based on the obtained defect information, the customer manufactures magnetic disks each being a discrete track recording medium having the nonmagnetic region formed at the position where the defect is present.

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Singapore Search and Examination Report corresponding to Singapore Patent Application No. 200800436-8, mailed Sep. 18, 2010.

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