Reverse optical mastering for data storage disk replicas
First Claim
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,wherein the grooves have depths less than 120 nanometers, andwherein the lands and grooves are inverse of corresponding features on a master disk used in a process of creating the replica disk.
4 Assignments
0 Petitions
Accused Products
Abstract
A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.
67 Citations
14 Claims
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1. A replica disk comprising:
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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, wherein the grooves have depths less than 120 nanometers, and wherein the lands and grooves are inverse of corresponding features on a master disk used in a process of creating the replica disk. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A replica disk comprising:
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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, wherein tops of the lands define widths that are less than 200 nanometers, wherein the widths of the tops of the lands are greater than 25 percent of the track pitch, and wherein the lands and grooves are inverse of corresponding features on a master disk used in a process of creating the replica disk. - View Dependent Claims (12, 13, 14)
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Specification
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- Resources
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Current AssigneeMax Blu Technologies, LLC (IP Investments Group LLC)
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Original AssigneeLegger COL AB LLC (Intellectual Ventures LLC)
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InventorsEdwards, Jathan D., Kerfeld, Donald J.
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Primary Examiner(s)HUBER, PAUL W
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Application NumberUS13/089,994Publication NumberTime in Patent Office651 DaysField of SearchNoneUS Class Current369/275.4CPC Class CodesG11B 23/0085 intermediate mediums using ...G11B 7/24 Record carriers characteris...G11B 7/24091 Combinations of pits and tr...G11B 7/261 Preparing a master, e.g. ex...G11B 7/263 Preparing and using a stamp...Y10S 425/81 Sound record
