Radiation shield for EPROM cells
US5050123A · kind A · utility
39Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved shield for an EPROM cell comprising a first and second metalization cover sections along with upstanding elements is disclosed. The invented shield protects selected EPROM cells from exposure to radiation in redundant memory applications. The shielding structure is designed such that radiation incident upon the memory only reaches the cell after traveling a circuitous route defined by the upstanding members. The improvement also increases the reliability of the memory while adding a degree of flexibility to the layout of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.