Claims
- 1. A positive-working radiation-sensitive mixture, comprising:
- a compound having at least one C--O--C bond which can be split by acid, said compound being selected from an orthocarboxylic acid derivative and a polyacetal;
- a compound which forms a strong acid when radiated;
- from 20 to 90% by weight, relative to the non-volatile constituents of the mixture, of a binder which is insoluble in water and soluble in an aqueous-alkaline solution;
- and
- from 1 to 50% by weight, relative to the non-volatile constituents of the mixture, of at least two resinous materials having solubility properties which differ from those of said binder, said resinous materials comprising a polyvinyl alkyl ether and an alkyl acrylate or methacrylate polymer, or a copolymer thereof.
- 2. A positive-working radiation-sensitive mixture as claimed in claim 1, wherein said polyacetal comprises a polyacetal wherein each alpha-carbon atom of the alcoholic constituent of the acetal groupings is aliphatic.
- 3. A radiation-sensitive mixture was claimed in claim 1, wherein said binder comprises a novolak.
- 4. A radiation-sensitive mixture as claimed in claim 1, wherein said resinous material comprises a polyvinyl lower alkyl ether present in an amount of from about 2-40% by weight of said radiation-sensitive mixture.
- 5. A radiation-sensitive mixture as claimed in claim 4, wherein said polyvinyl lower alkyl ether comprises polyvinyl methyl ether, polyvinyl ethyl ester or polyvinyl butyl ether.
- 6. A radiation-sensitive mixture as claimed in claim 1, wherein said resinous material comprises a lower alkyl acrylate or methacrylate polymer or a copolymer thereof present in an amount of from about 1-20% by weight of said radiation-sensitive mixture.
- 7. A radiation-sensitive mixture as claimed in claim 6, wherein said resinous material comprises a polyethyl acrylate or methacrylate or a polybutyl acrylate or methacrylate.
- 8. A positive-working radiation-sensitive mixture comprising:
- a compound having at least one C--O--C bond which can be split by acid, said compound being selected from an orthocarboxylic acid derivative and a polyacetal, wherein each alpha-carbon atom of the alcoholic constituent of the acetal groupings is aliphatic;
- a compound which forms a strong acid when radiated;
- from 20 to 90% by weight, relative to the non-volatile constituents of the mixture, of a binder which is insoluble in water and soluble in an aqueous-alkaline solution;
- and
- from 1 to 50% by weight, relative to the non-volatile constituents of the mixture, of at least one resinous material having solubility properties which differ from those of said binder, said resinous materials comprising a polyvinyl alkyl ether, or an alkyl acrylate or methacrylate polymer or a copolymer thereof.
- 9. A positive-working radiation-sensitive mixture as defined in claim 8, wherein said binder comprises a novolak.
- 10. A positive-working radiation-sensitive mixture as defined in claim 8, wherein said resinous material comprises a polyvinyl lower alkyl ether present in an amount of from about 2-40% by weight of said radiation-senstive mixture.
- 11. A positive-working radiation-sensitive mixture as defined in claim 10, wherein said polyvinyl lower alkyl ether comprises polyvinyl methyl ether, polyvinyl ethyl ether or polyvinyl butyl ether.
- 12. A positive-working radiation-sensitive mixture as defined in claim 8, wherein said resinous material comprises a lower alkyl acrylate or methacrylate polymer or a copolymer thereof present in an amount of from about 1-20% by weight of said radiation-sensitive mixture.
- 13. A positive-working radiation-sensitive mixture as defined in claim 12, wherein said resinous material comprises a polyethyl acrylate or methacrylate or a polybutyl acrylate or methacrylate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3023201 |
Jun 1980 |
DEX |
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Parent Case Info
This is a continuation, of application Ser. No. 274,402, filed June 17, 1981, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (5)
Number |
Date |
Country |
1622301 |
Feb 1972 |
DEX |
2236941 |
Feb 1974 |
DEX |
2617088 |
Nov 1976 |
DEX |
2733267 |
Jan 1978 |
DEX |
2718254 |
Nov 1978 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
274402 |
Jun 1981 |
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