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. 15, 2002
Filed:
Nov. 05, 1999
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The optical recording medium includes at least a recording layer, a recording supplemental layer, a reflection layer and a protection layer on a light permeable substrate, each of the recording layer and the recording supplemental layer is made mainly of an organic pigment material, with the optical recording medium, recording and reproducing is possible using a laser beam having a wavelength of &lgr; and also recording and/or reproducing is possible using a laser beam having a wavelength of &lgr; which is shorter than &lgr; a spectral absorbance of the recording layer is in the range between 5% and 35% at a wavelength of &lgr; and not less than 15% at a wavelength of &lgr; and the recording supplemental layer has a peak of spectral reflectance at a wavelength in the vicinity of &lgr;