FTP memory device with programming and erasing based on Fowler-Nordheim effect
US8619469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2010 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2216/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An embodiment of a non-volatile memory device integrated in a chip of semiconductor material is proposed. The memory device includes a plurality of memory cells. Each memory cell includes a first well and a second well of first type of conductivity that are formed in an insulating region of a second type of conductivity. The memory cell further includes a first, a second, a third and a fourth region of the second type of conductivity that are formed in the first well; these regions define a sequence of a first selection transistor of MOS type, a storage transistor of floating gate MOS type, and a second selection transistor of MOS type that are coupled in series. The first region is short-circuited to the first well. Moreover, the memory device includes a first gate of the first selection transistor, a second gate of the second selection transistor, and a floating gate of the storage transistor. A control gate of the storage transistor is formed in the second well; the control gate is capacitively coupled with the floating gate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.