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. 16, 2003
Filed:
May. 16, 2001
Jean Ledieu, Crespieres, FR;
O.D.M.E. International B.V., Veldhoven, NL;
Abstract
The invention concerns a pre-engraved substrate for a memory disc recordable by magnetic, magneto-optical or phase transition constraint, its manufacturing method and the resulting disc. Said pre-engraved substrate comprises a support ( ) having at its surface a surface film ( ) in a reflecting material and enabling to obtain a surface with optical polish and at least a recordable film ( ), the surface film ( ) and the film ( ) comprising a succession of microgrooves and/or pits ( ) representing a pre-formatting signal, the walls ( ) of said pits and/or microgrooves ( ) being formed in such of films ( ) and ( ) of the material constituting said film. The invention is useful for making magnetic, magneto-optical and phase transition optical discs, used particularly in the field of computers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile