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:
Oct. 20, 2009
Filed:
Mar. 22, 2005
Mitsuru Takai, Tokyo, JP;
Yoshikazu Soeno, Tokyo, JP;
Katsumichi Tagami, Tokyo, JP;
Kazuya Shimakawa, Tokyo, JP;
Takahiro Suwa, Tokyo, JP;
Mitsuru Takai, Tokyo, JP;
Yoshikazu Soeno, Tokyo, JP;
Katsumichi Tagami, Tokyo, JP;
Kazuya Shimakawa, Tokyo, JP;
Takahiro Suwa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
In an information recording medium where respective concave parts of a magnetic layer, which is formed on at least one side e of a substrate and in which a predetermined convex/concave pattern has been formed, are filled with non-magnetic material and non-magnetic layers are formed by the non-magnetic material in at least partial regions of respective upper surfaces of respective convex parts of the magnetic layer, the non-magnetic layers are formed so that parts thereof protrude further in a direction in which the convex parts protrude than other parts of the non-magnetic layers.