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. 17, 1989
Filed:
Jul. 31, 1986
Sumio Hirose, Yokohama, JP;
Hiroshi Ozawa, Isehara, JP;
Kenji Abe, Yokohama, JP;
Yoichi Hosono, Yokohama, JP;
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Yamamoto Chemicals, Inc., Yao, JP;
Abstract
Disclosed herein is a fabrication process of an optical recording medium permitting writing and reading-out of signals without any reflective layer. The medium is fabricated by coating, on a transparent thermoplastic resin substrate havnig pregrooves and pits or holes for preformatting signals, a dye solution of a phthalo/naphthalocyanine dye represented by the following general formula (I): ##STR1## wherein M means a metal, metal oxide or metal halide, and L.sub.1, L.sub.2, L.sub.3 and L.sub.4 mean individually a benzene or naphthalene ring skeleton which is unsubstituted or substituted by at least one monovalent substituent --Z selected from the class consisting of the following substituents: --R.sup.1, --OR.sup.2, --SiR.sup.3 R.sup.4 R.sup.5, --SR.sup.6, --COR.sup.7, --COOR.sup.8, --COHNR.sup.9, --NR.sup.10 R.sup.11, --R.sup.12 OR.sup.13, and --R.sup.14 X wherein R.sup.1 -R.sup.14 denote individually a hydrocarbon group having from 1 to 12 carbon atoms and X stands for a halogen atom.