磁気記録媒体用ガラス基板の製造方法

Title:

磁気記録媒体用ガラス基板の製造方法

Document Type and Number:

Japanese Patent JP5035405

Kind Code:

B2

Abstract:

An abrasion brush in which a width of each of bristle implanting portions is 1.1 to 2.2 times a stack width of stacked glass substrates (a thickness of each of the glass substrates when the glass substrates are stacked without using a spacer. or a sum of the thickness of the glass substrates and a spacer when the glass substrates are stacked using spacers) is used for an inner periphery end surface polishing of a magnetic recording medium glass substrate. By performing the inner periphery end surface polishing using the abrasion brush, scratches remaining in a chamfering portion of the glass substrate can be removed reliably with a high productivity, and it is possible to provide the magnetic recording medium glass substrate without pit defects in the chamfering portion.

Inventors:

Tomohiro Hoshino
Kashima out
Ryu Yamaguchi
Tatsuya Yamasaki

Application Number:

JP2010260189A

Publication Date:

September 26, 2012

Filing Date:

November 22, 2010

Export Citation:

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