Patent ID: 9543433
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. A recessed access device, comprising: semiconductor material having at least one trench therein; a gate dielectric over a surface of the at least one trench; a first gate material lining in a bottom portion of the at least one trench; the first gate material lining comprising a radially outer surface in the bottom portion of the trench, a radially inner surface in the bottom portion of the trench that is parallel with most of the radially outer surface, and a pair of top surfaces within the bottom portion of the trench intersecting each of the radially outer and inner surfaces of the first gate material lining; the radially outer and inner surfaces each extending continuously between the pair of top surfaces; and a second gate material within the at least one trench transversally over a sidewall of the radially inner surface of the first gate material lining, the second gate material being of different composition from composition of the first gate material, the second gate material projecting elevationally outward within the at least one trench relative to the pair of to surfaces of the first gate material lining.