Replica disk for data storage

  • US 8,593,931 B2
  • Filed: 12/28/2012
  • Issued: 11/26/2013
  • 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, andwherein the grooves have depths less than 120 nanometers.

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