Semiconductor memory structure with l-shaped channel and method for manufacturing the same

Abstract

The semiconductor structure comprises: semiconductor channels, first gate structures, second gate structures and bit lines. Each semiconductor channel extends in a third direction and has an L-shaped cross-section in a plane perpendicular to the third direction, each of the semiconductor channels comprises a first L-shaped sidewall and a second L-shaped sidewall which are opposite to each other and extend in the third direction, the first L-shaped sidewall comprises a first face extending in a first direction and a second face extending in a second direction. Each first gate structure is in contact with the first face. Each second gate structures is in contact with the second face, each first gate structure is in contact with the respective second gate structure. The bit lines extend in the second direction and are located on a side of each of the semiconductor channels in the third direction.