Electroless deposition of a non-noble metal on light generated nuclei of a metal more noble than silver
US3942983A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1967 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Jun 9, 1987 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/64
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention involves an imaging process in which a light image is projected onto a photosensitive medium having a layer capable upon light exposure of directly generating nuclei of a metal more noble than silver, such as palladium, which metal is catalytic to the electroless deposition of a non-noble metal, and thereafter selectively providing non-noble free metal onto the noble metal nuclei by electroless deposition, thereby providing a visible print of the original light image. The photosensitive layer in such media may comprise a compound of a metal more noble than silver and a photosensitive composition which can generate upon light exposure a reducing agent for said noble metal. In another embodiment, the photosensitive layer may contain a photoreducible metal salt which, upon light exposure, generates nuclei of a metal more noble than silver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.