Reverse Optical mastering for data storage disk stamper
7 Assignments
0 Petitions
Accused Products
Abstract
A date 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.
49 Citations
46 Claims
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1-29. -29. (Canceled)
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30. A stamper for use in creating replica disk substrates comprising:
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a stamper surface defining a data layer; and
a stamper pattern formed in the data layer defined by adjacent stamper lands and stamper grooves, wherein the stamper grooves extend down into the stamper surface, wherein the stamper grooves define stamper groove bottoms and the stamper lands define stamper land tops, wherein the stamper groove bottoms are wider than the stamper land tops and a stamper track pitch is less than 425 nanometers. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A stamper for use in creating replica disk substrates comprising:
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a stamper surface defining a data layer; and
a stamper pattern formed in the data layer defined by adjacent stamper lands and stamper grooves, wherein the stamper grooves extend down into the stamper surface, wherein the stamper grooves define stamper groove bottoms and the stamper lands define stamper land tops, and wherein a track pitch of the stamper pattern is less than 425 nanometers and a width of the stamper groove bottoms is greater than 25 percent of the track pitch. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A second-generation stamper for use in creating replica disk substrates, the second-generation stamper being created from a first-generation stamper, which was in turn created from a master disk, wherein the master disk includes a master pattern that was laser etched, the second-generation stamper comprising:
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a stamper surface defining a data layer; and
a stamper pattern formed in the data layer defined by adjacent stamper lands and stamper grooves, wherein the stamper grooves extend down into the stamper surface, wherein the stamper pattern defines a track pitch less than 2 multiplied by a laser spot size associated with a laser used to perform laser etching of the master pattern of the master disk, wherein the track pitch is less than 700 nanometers. - View Dependent Claims (43, 44, 45, 46)
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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 AssigneeImation Corporation (Glassbridge Enterprises, Inc.)
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InventorsEdwards, Jathan D., Kerfeld, Donald J.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current101/22
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CPC 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
