Reverse optical mastering for data storage disks

  • US 6,728,196 B2
  • Filed: 05/07/2001
  • Issued: 04/27/2004
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A master disk comprising:

  • a master substrate; and

    a layer of photosensitive material covering at least a portion of the mater substrate, the photosensitive material including a surface relief pattern in the form of a track pattern defined by adjacent master lands and master grooves, wherein the master grooves extend down to the master substrate, the master grooves including a master groove bottom and the master lands including a master land top, wherein the master groove bottom is wider than the master land top and a track pitch is less than 425 nanometers.

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