Patent ID: 8399920
Filing Date: 2013-03-19
Classification: H01L

Abstract:
1. A semiconductor device comprising: a transistor comprising a conductive gate received within and projecting elevationally outward of a trench in semiconductive material; a gate dielectric within the trench between the conductive gate and the semiconductive material; the conductive gate comprising first, second, and third vertically oriented conductive gate sidewalls received elevationally outward of the semiconductive material, the first and second vertical gate sidewalls being received on one of opposing sides of the gate, the second vertical gate sidewall being received elevationally outward of the first vertical gate sidewall, the first vertical gate sidewall being received laterally outward of the second vertical gate sidewall, the second vertical gate sidewall overlying the trench laterally between semiconductive material sidewalls of the trench, the third vertical gate sidewall being received on the other of the opposing sides of the gate; a first dielectric spacer along the third vertical gate sidewall and a second dielectric spacer along the second vertical gate sidewall; and a dielectric vertical spacing layer having a first portion between the gate and the semiconductive material on said other of the opposing sides of the gate, a second portion between the first dielectric spacer and the semiconductive material on said other of the opposing sides of the gate, and a third portion between the second dielectric spacer and the semiconductive material on said one of the opposing sides of the gate.