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.:
Date of Patent:
Mar. 06, 2007
Filed:
Mar. 23, 2004
Atsushi Koyama, Tokyo, JP;
Mikio Domon, Tokyo, JP;
Atsushi Koyama, Tokyo, JP;
Mikio Domon, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A stamper holder capable molding of a substrate having a high-quality. The stamper holder is mounted in a mold of a mold assembly that molds a substrate for an information recording medium, together with a stamper having a molding surface for forming micro asperities in a surface of the substrate, in a state where the stamper is fitted in an insertion hole formed through a central portion of the stamper. The stamper holder is formed such that an outer periphery thereof is increased in diameter on a side toward the molding surface compared with a reverse side thereof to form a sloped surface, and part or all of an outer peripheral surface of the stamper holder opposed to an inner peripheral surface of the stamper defining the insertion hole has a shape complementary to the inner peripheral surface of the stamper.