Semiconductor memory device
US4994889A · kind A · utility
10Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10B12/30
Abstract
A semiconductor memory device includes a memory cell array comprised of a plurality of memory cells each having a single transfer transistor and a single capacitor and a peripheral circuit including a plurality of drive transistors and adapted to drive the memory cell. The source and drain regions of the transfer transistor have an impurity concentration lower in level than that of the source and drain regions of the drive transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.