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:
Jul. 31, 2001
Filed:
Aug. 17, 2000
Takashi Ohgo, Yokosuka, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
An optical disc used for information recording capable of suppressing an increase of birefringence of the light-transmitting layer at the minimum, resulting in an optical disc having a high quality without a degradation of signal characteristics. The optical disc has a substrate having a group of pits/grooves representing information signal on a surface thereof, a reflecting layer formed on the substrate, and a resin film formed on the reflecting layer through an adhesive layer, wherein a thickness of the adhesive layer is made to be not more than 100 &mgr;m, and a product value of a photoelasticity constant, a modulus of tension elasticity and a thickness with respect to the resin film is established within −0.2 to 0.2 mm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile