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:
Dec. 03, 1996
Filed:
Nov. 05, 1993
Toshiyuki Miyadera, Tsurugashima, JP;
Takashi Chuman, Tsurugashima, JP;
Takashi Yamada, Tsurugashima, JP;
Fumio Matsui, Tsurugashima, JP;
Pioneer Electronic Corporation, Tokyo-to, JP;
Abstract
An optical recording medium comprises a light transmissive substrate, a record film formed on a surface of the base plate, the record film containing phthalocyanine as a coloring matter, a light-reflection film formed on a surface of the record film, and a protection film formed on a surface of the light-reflection film, the protection film having a thickness capable of preventing the light-reflection film from braking by a deformation thereof in directions to the light-reflection film and the protection film due to a formation of a pit in the record film. The data is recorded in the recording medium by irradiating a light from a side of the light transmissive substrate, melting and sublimating phthalocyanine in the record film to effect the deformation to the directions of the substrate, the light-reflection film and the protection film, and forming a cavity in the substrate and a capsule portion in the record film to cover the cavity, the capsule portion having a composition different from that of the record film.