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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 6835435 B1

PDFFull Text
Expired
Date of Patent:
Dec. 28, 2004

Filed:

Nov. 24, 2003

Stamper, mold system, recording medium substrate, recording medium, optical disc substrate, optical disc, and method for producing stamper

Applicant:
Inventors:

Yuuichi Kawaguchi, Tokyo, JP;

Kenji Yamaga, Tokyo, JP;

Hiroaki Takahata, Tokyo, JP;

Hisaji Oyake, Tokyo, JP;

Yoshimi Sakai, Tokyo, JP;

Assignee:

TDK Corporation, Tokyo, JP;

Attorney:

Oliff & Berridge PLC

Primary Examiner:

Elizabeth Mulvaney

Int. Cl.
CPC ...
B32B 3/02 ;
U.S. Cl.
CPC ...
B32B 3/02 ;
Abstract

A stamper for forming a data recording region on a recording medium substrate by means of a transfer surface thereof. The transfer surface transfers a predetermined set of data to the recording medium substrate. The stamper is fitted on at least one of metal molds that are arranged opposite one another for forming the recording medium substrate. The stamper includes a stepped portion formed as bends in the material of the stamper. The stepped portion is configured to project from the transfer surface toward the recording medium substrate.

Find Patent Forward Citations

Kawaguchi, Yuuichi. (2004). Stamper, mold system, recording medium substrate, recording medium, optical disc substrate, optical disc, and method for producing stamper (U.S. Patent No. 6835435). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6835435

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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