Claims
- 1. A process for forming positive images which consists essentially of imagewise exposing to actinic light a photosensitive image forming element comprising:
- a support;
- a first photosensitive layer comprising an o-quinone diazide compound provided on said support; and
- a second photosensitive layer which is substantially alkali insoluble directly overcoated on said first photosensitive layer, said second photosensitive layer being a homogeneous film rendered alkali-soluble upon exposure to actinic light and consisting essentially of in quantities sufficient to form an image upon development, as separate ingredients;
- (i) an aryl azide compound having one or two aryl groups and at least one alkali-soluble group selected from the group consisting of a sulfonic acid group, a carboxylic acid group, and a hydroxyl group, and the alkali metal salts thereof in its molecular structure, and
- (ii) a polyamide soluble in a lower alcohol, said polyamide and azide compound capable of co-acting to render areas exposed with actinic light alkali-soluble while unexposed area remain alkali-insoluble, and thereafter selectively dissolving said exposed areas in an alkaline medium.
- 2. The process of claim 1, wherein said aryl azide comprises a maximum of 2 azide groups.
- 3. The process of claim 1, wherein said azide is selected from the group consisting of 4-azidebenzenesulfonic acid, 4-azidebenzenecarboxylic acid and sodium 4,4'-diazidestilbene-2,2'-disulfonate.
- 4. The process of claim 1, wherein said polyamide and said azide compound are soluble in the same solvent.
- 5. The process of claim 4, wherein said solvent is a lower alkanol.
- 6. The process of claim 4, wherein said solvent is dimethylformamide.
- 7. The process of claim 1, wherein from about 3 to about 30 parts by weight of said azide is present per 100 parts by weight of said polyamide and said first layer contains more than 20% by weight of said quinone diazide compound.
- 8. The process of claim 1, wherein said first and second photosensitive layers are each present in an amount of about 0.01 to about 5.0 g/m.sup.2, dry basis.
- 9. The process of claim 8, wherein the layer comprising the nylon copolymer and azide compound is coated in an amount of about 0.02 g/m.sup.2 to 4.0 g/m.sup.2 and the layer comprising the o-quinone diazide compound is coated in an amount of below 3.0 g/m.sup.2.
- 10. The process of claim 1, wherein said polyamide has a molecular weight of from about 1,000 to 50,000.
- 11. The process of claim 1, wherein said second photosensitive layer further contains a silane coupling agent in an amount from 1 to 100% by weight, based on said polyamide.
- 12. The process of claim 11, wherein said silane coupling agent is .gamma.-glycidoxypropyltrimethoxy-siloxane or .beta.-(3,4-epoxycyclohexyl)-ethyltrimethoxysilane.
Priority Claims (1)
Number |
Date |
Country |
Kind |
49/116907 |
Oct 1974 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 621,104, filed Oct. 9, 1975, now abandoned.
US Referenced Citations (34)
Continuations (1)
|
Number |
Date |
Country |
Parent |
621104 |
Oct 1975 |
|