Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DISK SUBSTRATE INTERMEDIATE PRODUCT AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH11188588
Kind Code:
A
Abstract:

To manufacture a disk substrate having a highly accurate flatness and surface roughness, free from surface defect such as pit, and being low in cost and made of inorganic material such as glass.

A surface plate 2 for finishing is formed by solidifying abrasive grains having a specified grain size, and arranged so that the center of rotation P of a work surface plate 6 comes on the circumference of the surface plate 2 for finishing. Then the surface plate 2 for finishing and work surface plate 6 are slid relatively with each other for grinding so that a locus of a contact area 20 of the surface plate 2 for finishing with a disk substrate 30 on the work surface plate 6 becomes a constant.


Inventors:
Naito, Tsutomu
Application Number:
JP1997000361397
Publication Date:
July 13, 1999
Filing Date:
December 26, 1997
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NGK INSULATORS LTD
International Classes:
B24B7/24; B24B7/22; B24B41/047; G11B5/73; G11B5/82; G11B5/84; (IPC1-7): B24B7/24; G11B5/84
Attorney, Agent or Firm:
渡邉 一平