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:
Nov. 02, 1999
Filed:
Aug. 08, 1997
Applicant:
Inventors:
Assignee:
Samsung Electronics Co., Ltd., Suwon, KR;
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
428 641 ; 428 644 ; 428 647 ; 428457 ; 428913 ; 43027012 ; 4304951 ; 430945 ; 3692751 ; 369283 ; 369288 ;
Abstract
In the optical recording medium including a substrate having pregrooves, and a metal recording layer, a buffering layer, a reflecting layer and a protecting layer which are sequentially stacked on the substrate, an angle (.theta.) of the slanted side of the pregrooves is 30.about.90.degree. and the buffering layer has 10.about.50,00O Pa.S melt-viscosity at 140.degree. C. Therefore, the optical recording medium can be compatible with a CD and playable by a DVDP, and manufactured at low costs without using a dye, while providing a high reflectivity at longer wavelength than 600 nm.