Reverse optical mastering for data storage disk replicas

  • US 7,352,685 B2
  • Filed: 03/02/2004
  • Issued: 04/01/2008
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Fees
First Claim
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1. A replica disk made from a replication process that includes creation of a master disk, creation of a first-generation stamper from the master disk and creation of a second-generation stamper from the first-generation stamper, the replica disk comprising:

  • a replica substrate having a first major surface and a second major surface, the first major surface including a surface relief pattern defined by adjacent lands and grooves, the surface relief pattern having a track pitch less than 425 nanometers, wherein the grooves extend down into the replica substrate, the grooves including groove bottoms and the lands including land tops, wherein the land tops are wider than the groove bottoms.

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