Method for producing metal film resistor by electroless plating
US3930896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | May 17, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method for producing a metal film resistor by (1) treating a base material with a stannous chloride solution, silver salt solution and palladium chloride solution, respectively, (2) subjecting the thus treated base material to electroless plating in a bath having a pH of 9.5-10.5 containing specified amounts of cobalt salts, nickel salts, sodium hypophosphite and specific acetifying agents, at a temperature of 20.degree.-50.degree.C, (3) heat treating the resultant metal film under specified conditions, which are also effective to prevent oxidation of the film and (4) subjecting the heattreated metal film to a surface treatment under specified conditions, which are also effective to cause oxidation of the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.