Process for the formation of an image
US4857437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/148
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for the formation of an image comprises PA0 (i) applying to a substrate a layer of a liquid composition comprising PA1 (A) a residue which is cationically polymerizable or polymerizable by means of free radicals, PA1 (B) a radiation-activated polymerization initiator for (A) and PA1 (C) a radiation-solubilizable residue, PA0 (ii) subjecting the composition to radiation having a wavelength at which (B) is activated but at which (C) is not substantially activated, optionally followed by heating, thereby polymerizing (A) such that the layer of liquid composition is solidified, PA0 (iii) subjecting the solidified layer in a predetermined pattern to radiation having a wavelength which is different from that of the radiation used in stage (ii) and at which the residue (C) is activated, such that the solidified layer is rendered more soluble in a developer in exposed areas than in unexposed areas, and PA0 (iv) removing the exposed areas by treatment with a 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.