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. 04, 2011
Filed:
Sep. 26, 2007
Erwin Buerkle, Benediktbeuem, DE;
Martin Eichlseder, Tettenweis, DE;
Erwin Buerkle, Benediktbeuem, DE;
Martin Eichlseder, Tettenweis, DE;
Thomson Licensing SAS, Bologne-Billancourt, FR;
Abstract
A device and a method are disclosed for producing an optical data medium, in particular high density optical media, such as the recently developed BlueRay™ disk for illumination with a blue laser (λ≈405 nm). The required thickness of the data and/or protective layers is of the order of at most several tenths of millimeters. Such thin layers are difficult to produce with conventional injection molding processes. The disclosed device and method solve this problem by overflowing an element placed in a narrow cavity with a low-viscosity material having a viscosity lower than the viscosity of polycarbonate, which then forms the data or protective layer, or by bonding a layer produced in this manner to another layer using a low-viscosity adhesive.