Semiconductor device capable of blocking contaminants
US5289031A · kind A · utility
6Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Dec 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S257/913
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A semiconductor device comprises a semiconductor substrate having first and second major surfaces, semiconductor elements formed on the first surface of the semiconductor substrate, and a blocking layer formed within the substrate at a given distance from the second major surface for blocking the passage of heavy metals through the semiconductor substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.