Process for production of positive images using sulfonic acid precursors
US4618564A · kind A · utility
26Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | May 24, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Positive images are produced by (i) exposing to actinic radiation in a predetermined pattern a composition supported on a substrate, which composition comprises a film-forming organic material and a substance which releases a sulphonic acid on exposure to actinic radiation, thereby rendering the composition more soluble in the developer in the exposed areas than the unexposed areas, and (ii) treating the composition with the aqueous base developer to remove the unexposed areas. The image-forming process may be used in the production of printing plates and electrical circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.