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:
Mar. 01, 2005
Filed:
Oct. 24, 2002
Johannes Cornelis Norbertus Rijpers, Eindhoven, NL;
Guo-fu Zhou, Eindhoven, NL;
Johannes Cornelis Norbertus Rijpers, Eindhoven, NL;
Guo-Fu Zhou, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A description is given of multi-stack optical data storage medium () for rewritable recording by means of a focused laser-light beam (), said medium () having a substrate () with deposited on a side thereof: a first recording slick () comprising a phase-change type recording layer ()- at least one further recording stack () comprising a phase-change type recording layer (),- a transparent spacer layer () adjacent each further recording stack (). The further recording stack () is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack (). For this purpose, at least one heat sink layer () made of HfNx, and 1.1=×=1.6, is present in at least one of the recording stacks (). The heat sink layer () further ensure proper cooling behavior of the recording layer () of the further recording stack () in order to obtain sufficient recording performance in the further recording stack ().