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:
Feb. 12, 2002
Filed:
Aug. 11, 1999
Hideo Daimon, Ibaraki-ken, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
The present invention provides an optical recording medium which is inhibited or prevented from sticking of lubricants onto a light emitting face of a solid immersion lens. The optical recording medium of the present invention comprises a substrate and, provided thereon in succession, a reflective layer , a recording layer , a protective layer and a lubricating layer . The lubricating layer is heated and/or irradiated with ultraviolet rays to adjust the lubricant bonding rate to at least 60%, thereby to reduce the amount of physical adsorptive lubricant contained in the lubricating layer . As a result, when recording and reproduction are carried out using a floating type optical head provided with a solid immersion lens, the lubricant hardly sticks to the light emitting face of the solid immersion lens. The lubricant bonding rate can be enhanced to 80% or more by rinsing the lubricating layer with a solvent after the heating and/or the irradiation with ultraviolet rays.