Formation of metal images using reducible non-noble metal salts and light sensitive reducing agents
US3994727A · kind A · utility
34Cited by
8References
59Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1974 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24322
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Non-conductive real images are formed on substrates by depositing reducible metal salt compositions thereon from an aqueous acidic solution of pH 1.5-5 containing bromide ions and exposing the coated substrates to radiant energy to reduce the metal salt to metallic nuclei and to produce a real image of metal, which is intensified and built up by electroless metal deposition. The metal salt composition can either be selectively deposited and then exposed, or uniformly deposited and then selectively exposed, to produce the real image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.