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Patent Searching and Data


Title:
MANUFACTURE OF STAMPER FOR INFORMATION-RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPH02310027
Kind Code:
A
Abstract:

PURPOSE: To reduce the time for producing a mother stamper, which defects are not easily generated on the group surfaces of the stampers for information- recording medium by producing the mother stamper from resin base.

CONSTITUTION: While the father stamper 2 made from the glass materix 1 with fine pattern by electroforming, is used, the fine pattern of the father stamper is transferred onto the base composed of resin material, whereby a mother stamper 3 is made. A metallic conductive film 8 is formed on the fine pattern of the mother stamper 3, and on said metallic conductive film 8, a metallic base is formed by electroforming, and then by tearing off said materials from the mother stamper, the stamper 4 for information-recording medium may be obtained. In the stamper for making a number of the base, a plurality of the father stampers 2 are stuck onto the erection holder 10 for the father stamper preliminarily provided with the groove equal to the total thickness of the father stamper and the connected layer through a connecting layer 9. By using the stamper for making a number of the bases, a plurality of the bases for information-recording medium may be produced at one time.


Inventors:
KAMITAKAHARA HIROFUMI
YOSHINO HITOSHI
Application Number:
JP13160289A
Publication Date:
December 25, 1990
Filing Date:
May 26, 1989
Export Citation:
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Assignee:
CANON KK
International Classes:
B29C33/38; B29D17/00; G11B7/26; (IPC1-7): B29C33/38; B29D17/00
Attorney, Agent or Firm:
Wakabayashi Tadashi