Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode
Patent
1995-06-29
1997-09-23
Tran, Minh-Loan
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Having insulated electrode
257296, 257369, 365182, H01L 2702
Patent
active
RE0356131
ABSTRACT:
A semiconductor memory device includes a first conductivity type well in a first conductivity type semiconductor substrate surrounded by a second conductivity type well, one of a memory cell and an external input circuit arranged on the first conductivity type well and the other disposed outside the second conductivity type well. A predetermined power supply voltage is applied to the second conductivity type well and the first conductivity type well is connected to ground. In the structure, charge carriers injected from the external input circuit are absorbed in the second conductivity type well. As a result, the charge carriers are prevented from reaching the memory cell and destroying data stored therein. Therefore, it is possible to miniaturize transistors and increase integration density of dynamic random access memory devices without degrading the source to drain dielectric strength.
REFERENCES:
patent: 4163245 (1979-07-01), Kinoshita
patent: 5079613 (1992-01-01), Sawada et al.
patent: 5404042 (1995-04-01), Okumura et al.
Fujii et al., "A 45-ns 16-Mbit DRAM With Triple-Well Structure", IEEE Journal of Solid-State Circuits, vol. 24, No. 5, Oct. 1989, pp. 1170-1175.
1989 ISSCC Digest of Technical Papers, IEEE International Solid-State Circuit Conference, Feb. 1989, pp. 248-249.
Mori Shigeru
Suwa Makoto
Yasuda Ken'ichi
Mitsubishi Denki & Kabushiki Kaisha
Tran Minh-Loan
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