Magnetic transfer apparatus and magnetic recording medium

Details Magnetic transfer apparatus and magnetic recording medium Magnetic transfer apparatus and magnetic recording medium

2006-03-14

2006-03-14

Stafira, Michael P. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

C356S237200

Reexamination Certificate

active

07012681

ABSTRACT:
A magnetic transfer apparatus writing a servo signal by magnetically transferring to a magnetic recording medium, and an optical type inspection apparatus for optically inspecting scratch or foreign matter on the magnetic recording medium wherein a characteristic grease is used for these apparatuses are disclosed. Grease used in the magnetic transfer apparatus or the optical type inspection apparatus generates sulfur type gas in amount less than or equal to 0.5 ppb.

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patent: 6031615 (2000-02-01), Meeks et al.
patent: 6104681 (2000-08-01), Yonezawa
patent: 10-40544 (1998-02-01), None
patent: 11-25455 (1999-01-01), None

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