Reverse optical mastering for data storage disk replicas

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 niajor 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 a width of the land tops is greater than 25 percent of the track pitch.

A replica disk made from a replication process that includes creation of a laser etched master disk, creation of a first-generation stamper from the laser etched 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 defining a track pitch less than 2 multiplied by a laser spot size associated with a laser used to perform laser etching of the laser etched master disk, wherein the track pitch is less than 700 nanometers.

A replica disk comprising:

• a replica substrate having a first major surface and a second major surface, the first major surface including a surface pattern defined by lands and grooves, the surface relief pattern defining a track pitch less than approximately 700 nanometers,
• wherein groove depths of the grooves are less than approximately 120 nanometers deep, and
• wherein land tops of the lands are less than approximately 200 nanometers wide.

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 lands that correspond to interrupted grooves formed in the master disk, wherein land tops of the lands are less than approximately 200 nanometers wide.