Etchant and process of etching with the same
US4130454A · kind A · utility
19Cited by
2References
18Claims
0Family size
Inventors
Key dates
| Filing date | Sep 30, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Sep 30, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F1/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention is directed to an etchant and to a process for its use. The etchant comprises a synergistic combination of hydrogen peroxide and molybdenum as oxidants in acidic solution. The combination of oxidants provides for sustained etching at an exalted rate. The etchant is useful for etching metals, especially copper and its alloys, and is particularly useful in the manufacture of printed circuit boards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.