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. 12, 2000
Filed:
May. 19, 1999
Applicant:
Inventor:
William R Mueller, Clarks Summit, PA (US);
Assignee:
WEA Manufacturing, Inc., Olyphant, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ; G11B / ; G11B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
20419227 ; 20419215 ; 20419226 ; 428 641 ; 428 642 ; 428 644 ; 428 647 ; 428 651 ; 428 652 ; 3692751 ; 369283 ; 369288 ; 369 94 ; 369112 ; 156230 ; 156234 ; 156241 ; 1563798 ; 156391 ; 156510 ; 156539 ; 156540 ; 427154 ; 427576 ; 118 44 ; 118 35 ; 118 45 ; 118 56 ; 118 57 ; 118209 ;
Abstract
A dual-layer DVD disc that does not require a stamping step (typically, as part of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate is molded and coated with a semireflective data layer in the usual way. A PMMA substrate is molded and coated with a fully reflective data layer. Adhesive is placed on the semireflective data layer, and the fully reflective data layer is transferred from its PMMA substrate to the polycarbonate substrate. The polycarbonate substrate thus ends up with two data layers in conformance with the DVD specifications, and the PMMA substrate can even be recycled for another use.