Glassmastering photoresist read after write method and system
First Claim
1. A system for recording information in a read-after-write process of making optical discs, said system comprising:
- a recording chamber for containing a glassmaster a first light source for generating a writing light beam;
a second light source for generating a reading light beam for reading data written on said glassmaster by said writing light beam;
a photodetection system for detecting diffraction in said reading light beam caused by passing said reading light beam through said glass master; and
a humidifier for controlling humidity in said recording chamber.
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Abstract
A method of manufacturing an optical disc master from a glass substrate includes coating the substrate with a layer of photoresist, and applying an alkali-gel layer atop the photoresist. The coated substrate is then placed in an environment with a higher than normal humidity. The surface of the coated glass is selectively exposed to a beam of a writing laser, the exposure being controlled by digital information to be recorded on the disc. Exposed portions of the coated substrate experience a chemical reaction between the photoresist and the alkali material in the humid environment. Exposed portions are then developed and ablated thereby creating the pits and lands.
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Citations
9 Claims
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1. A system for recording information in a read-after-write process of making optical discs, said system comprising:
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a recording chamber for containing a glassmaster a first light source for generating a writing light beam;
a second light source for generating a reading light beam for reading data written on said glassmaster by said writing light beam;
a photodetection system for detecting diffraction in said reading light beam caused by passing said reading light beam through said glass master; and
a humidifier for controlling humidity in said recording chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification