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Optical memory device and a method for manufacturing thereof
| Details |
Inventors: Glushko, Boris;
Assignee: O.M.D. Optical Memory Devices, Ltd. (Rehovot, IL)
Primary Examiner: Vargot; Mathieu D.
Assistant Examiner:
Attorney, Agent or Firm: Birch, Stewart, Kolasch & Birch, LLP
An optical memory device and a method for manufacturing thereof. An optical memory device has at least one data layer formed on a substrate. An upper surface of the substrate is formed with a pattern comprising a plurality of regions which are capable of obtaining, when covered by a recording medium, desired optical properties different from those of the substrate. The patterned surface of the substrate is coated with the recording medium. The recording medium is removed from the patterned surface after the recording regions have obtained the desired optical properties. |
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DETAILED DESCRIPTION It is a major object of the present invention to provide a novel method of manufacturing an optical memory device, particularly such a method which is suitable for mass production of the optical memory devices.
It is a further object of the present invention to provide such a method which enables to manufacture a multi-layered optical memory device.
It is a still further object of the present invention to provide such a method which is suitable for manufacturing a recordable optical memory device.
There is thus provided according to one aspect of the present invention a method of manufacturing an optical memory device having a data layer formed on a substrate, the method comprising the steps of: (a) forming an upper surface of the substrate with a pattern having a plurality of regions which are capable of obtaining, when covered by a recording medium, desired optical properties different from those of the substrate; (b) coating the patterned surface of the substrate with the recording medium; and (c) removing the recording medium from the patterned surface after the recording regions have obtained the desired optical properties.
In the step (a), the pattern may be in the form of a surface relief on the upper surface of the substrate.
This may be achieved by forming the upper surface of the substrate with a plurality of recesses, for example, by means of a stamper device.
Alternatively, the substrate itself may be in the form of a stamper substrate, in which case the method may also comprise, subsequently to the step (c), the step of placing an optical film onto the stamper substrate so that the recording medium filled in the recesses of the stamper substrate is stuck to the film in the regions corresponding to the recording regions on the stamper substrate.
Each of the recesses has a sufficient depth to be at least partially filled with the recording medium.
The step of forming the pattern may comprise the step of forming the upper surface of the substrate with regions having adsorbing properties for adhering the recording medium thereto
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MEMS 
