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:
Nov. 26, 1985
Filed:
Oct. 12, 1983
Kazuharu Odawara, Yokohama, JP;
Yoshiaki Tago, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
An optical disk with a recording layer formed on the inner surface of a protective plate has data which is read out upon irradiation of a laser beam. A substrate supports the protective plate such that the recording layer opposes the substrate and a space is formed therebetween. The spacer is sandwiched between the protective plate and the substrate so as to couple them. The spacer is an elastically deformable member. Therefore, when the protective plate expands or contracts relative to the substrate, due to deformation of the spacer, excessive force does not affect the recording medium. Warp, wave or damage to the disk due to expansion/contraction of the protective plate or substrate can be prevented, thereby allowing stable data processing.