Reverse optical mastering for data storage disk replicas

  • US 7,801,016 B2
  • Filed: 09/04/2009
  • Issued: 09/21/2010
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A replica disk comprising:

  • a replica substrate including a first major surface and a second major surface, the first major surface including a surface pattern defined by lands and interrupted grooves,wherein the surface pattern defines a track pitch that is less than 425 nanometers,wherein tops of the lands define widths between 25 percent of the track pitch and 140 nanometers, andwherein the grooves define depths between 20 and 120 nanometers.

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