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. 07, 1997
Filed:
Dec. 20, 1995
Stanford R Ovshinsky, Bloomfield Hills, MI (US);
Hellmut Fritzsche, Chicago, IL (US);
Energy Conversion Devices, Inc., Troy, MI (US);
Abstract
A phase change optical recording medium which includes 1) a substrate having a planar surface; and 2) a plurality of discrete data recording points deposited upon the substrate. The discrete data recording points are formed from a phase change material which changes from a state of a first relative order to a state of a second relative order and visa versa upon the application of optical beam energy. Preferably the phase change material forming the plurality of discrete data recording points is deposited within individual cavities embossed into the surface of the substrate. More preferably the individual cavities are cylindrical or parabolic (bowl shaped) cavities having their central axis perpendicular to the plane of the surface of the substrate.