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:
Jan. 03, 2006
Filed:
Mar. 19, 2003
Masashi Suenaga, Moriya, JP;
Yusuke Takahashi, Moriya, JP;
Masashi Suenaga, Moriya, JP;
Yusuke Takahashi, Moriya, JP;
Hitachi Maxell, Ltd., Ibaraki, JP;
Abstract
An optical information-recording medium having in-groove pits, which is excellent in recording and reproduction characteristics and tracking characteristics, is provided. A method for producing the optical information-recording medium is also provided. Further, a stamper to be used for producing a substrate for the optical information-recording medium and a method for producing the same are also provided. In the optical information-recording medium of the present invention, the in-groove pits, which have flat bottom surfaces, are arranged on a groove which has a flat bottom surface. Therefore, it is possible to increase the difference between a height position of an interface between a recording layer and a reflective layer at a groove portion formed with the recording layer containing an organic dye and a height position of the interface between the recording layer and the reflective layer at an in-groove pit portion, as compared with an optical information-recording medium in which a wide-width portion and a narrow-width portion are formed on a groove. Accordingly, information, which is recorded on the in-groove pits, can be reproduced at a high modulation factor and at a low jitter.