Additives for electroplating compositions and methods for their use
US4981564A · kind A · utility
11Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | May 7, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/3473
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Heteroaromatic compounds having at least two nitrogen atoms may be used to regulate consistency of alloy content and of deposit thickness. Modified nonionic surfactants which lack terminal hydroxy groups are used as grain refiners having low tendency to cause foam build-up in electroplating baths. Dioxolanes may be used to produce deposits having, as desired, a white uniform matte, a semi-bright plate, or a mirror bright surface. Antioxidants are used to prevent oxidation of divalent tin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.