| CPC H01L 29/4238 (2013.01) [H01L 29/1095 (2013.01)] | 22 Claims |
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1. A transistor unit with a shared gate structure, the transistor unit comprising:
an active area having a body extending in a first direction parallel to a top surface of a substrate, and a protrusion extending in a second direction perpendicular to the first direction and parallel to the top surface of the substrate, the protrusion connecting to a central portion of the body, which is central with respect to the first direction, and extending in the second direction away from the body;
a separation area extending in the second direction through the body to have a first end in the protrusion and a second end in the body and opposite the first end in the second direction, the separation area separating the body into two portions and separating a first portion of the protrusion into two parts, one part on each side of the separation area; and
a gate arranged above the active area in a third direction perpendicular to the first and second directions, to cover a channel area of the active area, and having a structure that exposes a top of the active area with respect to the gate, at a channel-avoidance region of the active area adjacent to the second end of the separation area,
wherein the active area is divided into a first active area and a second active area by the separation area, wherein the first active area is connected to the second active area through a second portion of the protrusion, and
wherein opposite ends, in the first direction, of the body correspond to two drain areas, the second portion corresponds to a common source area, and the two drain areas, the common source area, and the gate constitute two transistors, wherein the two transistors share the gate.
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