Process for the formation of an image
US5002858A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Nov 7, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/136
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for the formation of an image comprises PA1 (i) electrodepositing on a conductive surface a layer of a quinone diazide positive photoresist, PA1 (ii) subjecting the layer to radiation in a predetermined pattern, PA1 (iii) heating the layer such that areas thereof exposed in stage (ii) are rendered insoluble in an aqueous base developer, PA1 (iv) subjecting the layer to radiation such that the areas not exposed in stage (ii) are rendered more soluble in an aqueous base developer than the areas rendered insoluble in stage (iii) and PA1 (v) removing the areas not exposed in stage (ii) by treatment with an aqueous base developer. The process is useful in the production of printing plates and printed circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.