IP Library › Patent Application 11775634
Patent Application
App. No. 11/775,634

PROCESS FOR PRODUCING GLASS SUBSTRATE FOR MAGNETIC DISK

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Quick Facts
Patent No.
US None
App. No.
11/775,634
Abstract

A process for producing a glass substrate for a magnetic disk, which comprises etching an edge surface of circular glass, followed by polishing.

Claims (3)

1 . A process for producing a glass substrate for a magnetic disk, which comprises etching an edge surface of circular glass, followed by polishing.

2 . The process for producing a glass substrate for a magnetic disk according to claim 1 , wherein second etching is carried out after the polishing.

3 . The process for producing a glass substrate for a magnetic disk according to claim 1 , wherein as the polishing, at least one of brush polishing, sponge polishing, polishing with a viscous fluid, polishing with a magnetic fluid and polishing with a sponge abrasive, is carried out.

Assignments (2)
CORPORATE ADDRESS CHANGE Recorded Nov 9, 2011
From: ASAHI GLASS COMPANY, LIMITED
To: ASAHI GLASS COMPANY, LIMITED
Reel/Frame 027197/0541 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 10, 2007
From: MANNAMI, KAZUO; ITO, MASABUMI
To: ASAHI GLASS COMPANY, LIMITED
Reel/Frame 019538/0835 →