Screened EEPROM cell
US6151245A · kind A · utility
9Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Dec 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/00
Abstract
An EEPROM cell is described as having a screening metal structure formed of preference in the first metal layer and located in substantial overlaying relationship at the floating gate terminal. This defeats the possibility of anomalous readings being obtained by measuring the amount of charge on the floating gate terminal. An additional screening metal structure, to be formed in the third and following metal layers, may be provided to fully overlie the cell and provide additional protection against anomalous readings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.