Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
In-oh Hwang0
Joo-ho Kim0
Hyun-ki Kim0
Date of Patent
February 6, 2007
0Patent Application Number
109543620
Date Filed
October 1, 2004
0Patent Primary Examiner
Patent abstract
A high density read only optical disc is provided. The high density read only optical disc includes a substrate having pits formed thereon; a crystalline reading assist layer; a first dielectric layer; and a mask layer composed of a metal oxide. The high density read only optical disc does not require a laser with a short wavelength or a large numerical aperture of an objective lens.
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