Apparatus and methods for circumferentially aligned features
AssigneeSeagate Technology LLC
InventorsShuaigang Xiao, XiaoMin Yang, David S. Kuo, Kim Y. Lee, Koichi Wago, Yautzong Hsu
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Abstract
Provided herein is an apparatus, including a first region corresponding to a data region in a patterned recording medium; a first set of features in the first region; a second region corresponding to a servo region in a patterned recording medium; and a second set of features in the second region including rhomboidal protrusions, wherein the first set of features and the second set of features are circumferentially aligned in accordance with concentrically circular lines etched into the apparatus across the first region and the second region.
Claims20
An apparatus, comprising:
- a first region corresponding to a data region in a patterned recording medium;
- a first set of features in the first region;
- a second region corresponding to a servo region in a patterned recording medium;
- and
- a second set of features in the second region comprising rhomboidal protrusions,
- wherein the first set of features and the second set of features are circumferentially aligned in accordance with concentrically circular lines etched into the apparatus across the first region and the second region.
A method, comprising:
- creating a first region comprising a first set of features in a substrate corresponding to a data region in a patterned recording medium;
- and
- creating a second region comprising a second set of features in the substrate corresponding to a servo region in a patterned recording medium,
- wherein creating the first region and the second region comprises superimposing a first pattern comprising concentrically circular lines and a second pattern comprising a combination of radial lines and chevrons in the substrate, and
- wherein the first set of features and the second set of features are circumferentially aligned in accordance with the concentrically circular lines.
A method, comprising:
- creating a first region comprising a first set of features in a substrate corresponding to a data region in a patterned recording medium;
- and
- creating a second region comprising a second set of features in the substrate corresponding to a servo region in a patterned recording medium,
- wherein creating the first region and the second region comprises superimposing a first pattern comprising concentrically circular lines and a second pattern comprising chevrons in the substrate, and
- wherein the first set of features and the second set of features are circumferentially aligned in accordance with the concentrically circular lines.
Dependencies are inferred from the claim text.