Patent ID: 11996469

Abstract:
A semiconductor structure and a method for forming the same are provided. One form of a method for forming a semiconductor structure includes: providing a base, the base including a first device region and a second device region, the base including an initial substrate and one or more initial channel stacks located on the initial substrate, and the initial channel stack including a sacrificial material layer and a channel material layer located on the sacrificial material layer; forming a discrete combined pattern on the initial channel stack, the combined pattern including a mandrel layer and a spacer layer located on a side wall of the mandrel layer, and the combined pattern exposing a boundary between the first device region and the second device region; forming a dielectric wall running through the initial channel stack at the boundary between the first device region and the second device region; and removing the mandrel layer. In embodiments and implementations of the present disclosure, the spacer layer has good uniformity, and the initial channel stack is etched by using the spacer layer as a mask to form a separate channel stack which has good morphology uniformity, which is conducive to improving the uniformity of the semiconductor structure performance.