Catalytic process and systems
US4888209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/387
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process is provided for conducting or catalyzing a chemical reaction on a surface by depositing on the surface an adherent monolayer of positively charged polymer particles containing an active agent distributed throughout the polymer and contacting the deposited adherent monolayer with a suitable reactant. The positively charged polymer particles have diameters of less than about 3 micrometers and preferably less than 1 micrometer. The polymer particles are suspended in water to form an aqueous colloidal dispersion. The dispersion is useful as a stable catalyst system and particularly useful for complete electroless deposition of a conductive metal on printed circuit board surfaces and the walls of throughholes formed therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.