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:
Jun. 15, 1999
Filed:
Jul. 31, 1996
Kiyoshi Uchida, Yamatotakada, JP;
Keiji Nishikiori, Daito, JP;
Matsushita Electric Industrial Co., Ltd., Osaks, JP;
Abstract
A high quality magneto-optical disk which has the protective coating being excellent in the lubricity, the property of sliding and a long-term reliability includes a UV-ray resin composition comprising photo polymerizable prepolymer, photo polymerization initiator and organic compound having a side chain of fluoroalkyl group or unsaturated aliphatic alkyl group in the end of each molecule. The UV-ray setting resin comprising photo polymerization prepolymer at 30-80 parts by weight; photo polymerization initiator at 10-40 parts by weight; and organic polysiloxane at 0.1-10 parts by weight per 100 parts by weight of (meth-)acrylic ester is applied to approximately 10 .mu.m on the reflection layer 14 by the spincoat method and irradiating the UV-ray (illuminance: 600 mW/cm.sup.2, quantity of light: 800 mJ/cm.sup.2) at room temperature, thus forming the protective coating.