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:
Sep. 04, 1984
Filed:
Jan. 24, 1983
Kent N Maffitt, Minneapolis, MN (US);
William B Robbins, Maplewood, MN (US);
Richard F Willson, Hudson, WI (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An optical recording medium containing a light-absorbing film of a refractary material selected from the group, consisting of boron, borides of carbon, silicon, hafnium, niobium, tantalum, titanium, tugsten, and zirconium, nitrides of boron, hafnium, tantalum and titanium, oxides of hafnium, cerium, magnesium and thorium, and silicides of niobium, tantalum, titanium, and tungsten less than 60 nm thick and which is sufficiently plastic to allow deformation upon localized heating by exposure to a focused laser beam, whereupon the localized heating of the light absorbing film enables information storage in the form of localized protuberances in the heated areas which can be used as a master for replication purposes.