Method for the production of radiant energy imaged printed circuit boards
US3930963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1972 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Feb 11, 1992 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/185
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Radiant energy imaged printed circuit boards are provided by treating an insulating base with a composition of a reducible metal salt and a radiant energy sensitive compound, exposing the treated base to radiant energy in selected areas to produce metallic nuclei in the form of a non-conducting real image of the desired circuit pattern, rinsing the exposed base to remove unexposed metal salts and exposing the real image to an electroless metal bath to build up conductor lines of electroless metal thereon. In an alternative procedure, conductor lines are built up by electroplating with the same or a different metal and, optionally, solder coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.