Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

1997-07-18

1999-11-09

Thomas, Tom

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

257355, 257546, H01L 2362, H01L 2900

Patent

active

059820071

ABSTRACT:
A semiconductor memory device is provided for preventing loss of cell data and reduction of a standby current. The semiconductor memory device includes a first conductivity type semiconductor substrate connected to a ground voltage, a first well region of second conductivity type formed over the semiconductor substrate and connected to the ground voltage, a second well region of the first conductivity type embedded in the first well region, a first impurity region of the second conductivity type embedded in the second well region and connected to an input/output pad, and one or more additional impurity regions embedded in the second well region separately from the first impurity region, the one or more additional impurity regions being connected to the ground voltage.

REFERENCES:
patent: 4712152 (1987-12-01), Iio
patent: 5181091 (1993-01-01), Harrington, III et al.
patent: 5684321 (1997-11-01), Okamura

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