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:
Sep. 06, 2005
Filed:
Apr. 22, 2002
Takuya Wada, Yawata, JP;
Hideki Aikoh, Higashiosaka, JP;
Takuya Wada, Yawata, JP;
Hideki Aikoh, Higashiosaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
It is an object to provide an optical information recording medium including a substrate () and an optical information layer in one of the layers the substrate () and having a light incident surface on at least one of the surfaces of the substrate side and the opposite side. The optical information recording medium also includes a magnetic clamp layer () at a position not disturbing the incident light into the optical information layer from the light incident surface and covering optical information layer partially or entirely. The magnetic clamp layer () is pulled by and fixed to the magnet of an optical information recording/reproduction apparatus. The pulling force between the clamp layer and the magnet is preferably in a range from 0.1 N to 5 N. Thus, it is possible to provide an optical information recording medium and an optical information recording/reproduction apparatus in which recording/reproduction can be performed up to the vicinity of the center of the substrate ().