Patent ID: 11978768

Abstract:
A method manufacturing of a semiconductor structure including following steps is provided. A material layer is provided. A first mask layer is formed on the material layer. Core patterns are formed on the first mask layer. A spacer material layer is conformally formed on the core patterns. An etch-back process is performed on the spacer material layer. A portion of the spacer material layer located on two ends of the core pattern is removed, then spacer structures are formed. Each spacer structure includes a merged spacer and a non-merged spacer. The core patterns are removed. The first patterned mask layer is formed to cover a portion of the merged spacer and expose another portion of the merged spacer and the non-merged spacer. The first patterned mask layer and the spacer structure are used as a mask, and the first mask layer is patterned into a second patterned mask layer.