Lead frame material and process for manufacturing the same
US6203931A · kind A · utility
13Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Feb 5, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12944
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a lead frame material and a process for manufacturing a lead frame material. The process includes forming an intermediate layer on a lead frame substrate by vacuum deposition and forming a top protective layer on the intermediate layer by vacuum deposition. By using vacuum deposition, the coating material can be selected from a wider variety of materials; thus, coatings with novel compositions can be formed. The intermediate layer can be Ni, Ag, W, Zn, Cr, Mo, Cu, Sn, Al, Ta, Co, Nb, or alloys thereof, and the top protective layer can be Pt, Ir, Re, Ru, Rh, Pd, Au, Ag, or alloys thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.