Abstract:
A semiconductor device includes a substrate including cell regions, active patterns adjacent to each other in first and second directions that are parallel to a lower surface of the substrate and intersect each other on the cell regions, a shield pattern surrounding side surfaces of the active patterns, a first isolation pattern surrounding the active patterns between the active patterns and the shield pattern, second isolation patterns between adjacent active patterns in the first direction, and word lines crossing the active patterns and the shield pattern in the second direction.
Abstract:
A method of manufacturing a semiconductor device includes forming a plurality of recess regions on an upper surface of a substrate, forming a first oxide layer in the recess regions, forming a polysilicon layer on the first oxide layer, forming a second oxide layer by oxidizing the polysilicon layer, and forming a gap-fill layer on the second oxide layer to fill the recess regions, wherein at least a portion of the polysilicon layer remains between the first oxide layer and the second oxide layer after forming the second oxide layer.