Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical disc and manufacturing method for the same










Image Number 13 for United States Patent #6700862.

The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The optical disc has plural substrate layers each having plural guide grooves; plural data recording layers laminated on the substrate layers, each of the plural data recording layers having a recording film for recording data over the guide grooves; and an intermediate layer between the plural data recording layers. The guide groove width is different on each substrate layer. The guide grooves of the data recording layers formed according to the guide grooves of the substrate layer have the same pitch in each data recording layer.








 
 
  Recently Added Patents
Powder pulverising device
System and method for backup communication over ethernet
Dual protocol input device
Electric connection box
Solid-state image sensing apparatus and electronic apparatus
Method for designing sunlight-reflection and heat-radiation multilayer film
Apparatus and method for foreground detection
  Randomly Featured Patents
Lighting device
Bis-phenoxypropanolamines
Switching device and method for parallel connection of subscriber terminal devices
Single cylinder hydraulic tension control system for round balers
Bracket for attaching interior equipment
Racemization and asymmetric transformation processes used in the manufacture of levobupivacaine and analogues thereof
Method of removing mercury and/or arsenic from water or mercury from a gas using an extruded onium ion intercalated silane coupling agent reacted layered phyllosilicate
Liquid crystal color display having volumes of the liquid crystal material without separating electrode means therebetween
Sulfur removal from hydrocarbons
Dispensing mechanism with quickly changeable auger