Claims
- 1. A master disc for the manufacture of matrices which in turn are used in the manufacture of optical information carriers, said master disc comprising a substrate plate provided on one side with a layer of a radiation-sensitive substance in which an optically readable information track formed of pits or grooves is provided, said radiation-sensitive substance being a polysulphone which corresponds to the formula ##STR4## where X.sub.1 and X.sub.2 are equal or unequal and each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an aryl group, or where they together represent one substituent, which is bonded to the carbon atom of the main chain with a double bond, and where n has a value from 50 to 5000 and said layer of said radiation-sensitive substance is provided with a radiation-absorbing colorant.
- 2. A master disc as claimed in claim 1, wherein light-sensitive substance is poly(1-butene sulphone).
- 3. A master disc as claimed in claim 1, wherein the layer thickness of the polysulphone layer is from 50 to 500 nm.
- 4. A master disc as claimed in claim 1, wherein the substrate plate is provided with an optically detectable follower track on the side of the polysulphone layer.
- 5. A master disc as claimed in claim 2, wherein the light-sensitive substance is poly(1-butene sulphone).
- 6. A master disc for the manufacture of matrices which in turn are used in the manufacture of optical information carriers, said master disc comprising a substrate plate provided on one side with a layer of a radiation-sensitive substance in which an optically readable information track formed of pits or grooves is provided, said radiation-sensitive substance being a polysulphone which corresponds to the formula ##STR5## where X.sub.1 and X.sub.2 are equal or unequal and each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an aryl group, or where they together represent one substituent, which is bonded to the carbon atom of the main chain with a double bond, and where n has a value from 50 to 5000 and a radiation-absorbing layer is provided between the substrate plate and the layer of the radiation-sensitive substance.
- 7. The master disc as claimed in claim 6, wherein the light-sensitive substance is poly(1-butene sulphone).
- 8. A master disc as claimed in claim 6, wherein the layer thickness of the polysulphone layer is from to 50 500 nm.
- 9. A master disc as claimed in claim 6, wherein the substrate plate is provided with an optically detectable follower track on the side of the polysulphone layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8701736 |
Jul 1987 |
NLX |
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Parent Case Info
This is a continuation of application Ser. No. 223,457, filed Jul. 21, 1988 abandoned.
US Referenced Citations (10)
Continuations (1)
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Number |
Date |
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Parent |
223457 |
Jul 1988 |
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