Reverse optical mastering for data storage disks
First Claim
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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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. The exposing and developing of a specified thickness of 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.
33 Citations
14 Claims
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1. A master disk comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 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 AssigneeImation Corporation (Glassbridge Enterprises, Inc.)
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InventorsEdwards, Jathan D.
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Primary Examiner(s)Huber, Paul W.
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Application NumberUS09/850,252Publication NumberTime in Patent Office1,086 DaysField of Search369/275.4, 369/277, 369/283, 369/284, 430/321, 101/28US 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
