Reverse optical mastering for data storage disk replicas

  • US 8,363,534 B2
  • Filed: 04/19/2011
  • Issued: 01/29/2013
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A replica disk comprising:

  • a replica substrate having a first surface that includes a surface pattern defined by lands and grooves,wherein the surface pattern has a track pitch that is less than 425 nanometers,wherein the grooves have depths less than 120 nanometers, andwherein the lands and grooves are inverse of corresponding features on a master disk used in a process of creating the replica disk.

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