Process for the formation of positive images utilizing electrodeposition of o-quinone diazide compound containing photoresist on conductive surface
US5080998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Dec 17, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0236
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for the formation of an image comprises PA1 (i) electrodepositing on a conductive surface a photosensitive film from an aqueous composition which is a solution or dispersion comprising a mixture of (A) a photosensitive o-quinone diazide such as an o-naphthoquinone diazide sulfonyl ester of a phenol, and (B) an electrodepositable film-forming resin such as a reaction product of a novolak resin, formaldehyde and diethanolamine in (C) an aqueous medium, the composition being substantially free from a resin having both a quinone diazide residue and a carboxyl, phosphonic or sulfonic acid group or amino group in the same molecule, PA1 (ii) subjecting the electrodeposited film to radiation in a predetermined pattern, such that exposed areas of the film become more soluble in aqueous base than unexposed areas, and PA1 (iii) removing the exposed areas by treatment with an aqueous base. The process is useful in the production of printing plates and printed circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.