Patent ID: 8217441
Filing Date: 2012-07-10
Classification: H01L

Abstract:
1. A semiconductor construction, comprising: a semiconductor substrate having a bulk semiconductor material with a thickness; a vertical direction being defined to extend through the thickness, and a horizontal direction being defined to extend orthogonally to the vertical direction; a transistor supported by the substrate; the transistor comprising a gate containing electrically conductive gate material; a channel proximate the gate; and a pair of source/drain regions on opposing sides of the channel; the source/drain regions and channel together forming a segment that extends primarily horizontally; the transistor comprising a dielectric material between the gate material and the channel; wherein the channel has a longitudinal axis from one of the source/drain regions to the other, and has a lateral periphery along a cross-section substantially orthogonal to the longitudinal axis; wherein the lateral periphery is a four-sided polygon; wherein the four-sided polygon of the channel has a bottom surface, a top surface, and a pair of side surfaces extending from the bottom surface to the top surface; wherein the dielectric material of the transistor is conformally along and directly against the top and side surfaces of the four-sided polygon of the channel, and extends under an entirety of the bottom surface, but is only directly against a portion of the bottom surface, and is not conformal to the bottom surface; the dielectric material from one side of the polygon contacting the dielectric material from the other side of the polygon under the bottom surface; and wherein the electrically conductive gate material of the transistor gate wraps around the lateral periphery of the channel and extends conformally along the dielectric material along the top and side surfaces of the four-sided polygon; the electrically conductive gate material of the transistor gate also extending to under the bottom surface of the four-sided polygon, and being under an entirety of the bottom surface except for a region where the dielectric material from one side of the polygon contacts the dielectric material from the other side of the polygon.