Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MANUFACTURING METHOD AND MANUFACTURING APPARATUS FOR MULTI-LAYERED OPTICAL INFORMATION RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2004030885
Kind Code:
A
Abstract:

To solve a problem that unevenness is caused in the thickness of a separation layer in the case of transferring signal pits by a stamper to the surface of a substrate together with the separation layer between the substrate and the stamper by using the stamper on the thick substrate, on the surface of which the signal pits are formed and on which a rewritable recording multi-layered film is formed.

A thickness distribution thicker in the inner circumferential part and gradually getting thinner toward the outer circumferential part in the radial direction is provided to a transfer layer 103 on the surface of the stamper 100, an adhesive layer 107 is formed between the surface of the signal substrate 105 on which the signal recording film 106 exists and the stamper 100 with the transfer layer 103 formed thereon, and the adhesive layer 107 has a thickness distribution thinner in its inner circumferential part and gradually getting thicker toward its outer circumferential part. Since the thickness distribution in the radial direction is opposite between the transfer layer 103 and the adhesive layer 107 to each other, the thickness distribution of the separation layer 110 having the two layers is made uniform.


Inventors:
HAYASHI KAZUHIDE
HISADA KAZUYA
TOMARU KAZUHIRO
ONO EIJI
Application Number:
JP2003000130363
Publication Date:
January 29, 2004
Filing Date:
May 08, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G11B7/24; B29C43/02; B29C43/20; G11B7/254; G11B7/257; G11B7/26; (IPC1-7): G11B7/26; G11B7/24
Attorney, Agent or Firm:
Masamichi Matsuda