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:
Aug. 21, 2007
Filed:
Jun. 04, 2002
Johannes Cornelis Norbertus Rijpers, Eindhoven, NL;
Jan Johannes Van Den Broek, Eindhoven, NL;
Hermanus Henricus Josephus Wilting, Eindhoven, NL;
Roel Van Woudenberg, Eindhoven, NL;
Johannes Cornelis Norbertus Rijpers, Eindhoven, NL;
Jan Johannes Van Den Broek, Eindhoven, NL;
Hermanus Henricus Josephus Wilting, Eindhoven, NL;
Roel Van Woudenberg, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The optical data storage medium () has a substrate () with a surface area having tracks () of marks representing stored information. The information is readable by means of a scanning radiation beam (). A reflective layer () is present, reflecting the radiation beam (). The medium has a radiation beam () reflection larger than 50%. The reflective layer () comprises a compound of the formula Al,X, in which formula Al is aluminum and X is an element selected from the group of Ge and Si. The letter y is the atomic fraction of X in at. %. The value of y is in the range 5<y<35. The reflective layer () has a radiation beam absorption, which enables controlled ablative recording or solid-phase change recording of an identification mark (').