Patent ID: 9218984
Filing Date: 2015-12-22
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, the method comprising: sequentially forming an etch-target layer, a first hard mask material layer, a first partition material layer, and a second hard mask material layer over a semiconductor substrate; selectively etching the second hard mask material layer to form a second hard mask pattern; etching the first partition material layer using the second hard mask pattern as an etch mask to form a first partition having first and second patterns; removing the second hard mask pattern; partially etching the first hard mask material using the first and second patterns of the first partition as an etch mask to remove a portion of the first hard mask material; forming a spacer material layer and a second partition material layer over the partially etched first hard mask material layer and over the first and second patterns of the first partition; partially etching the spacer material layer and the second partition material layer until the first pattern of the first partition and the second pattern of the first partition material layer are exposed, thereby partially exposing the spacer material layer and forming a second partition provided between the first pattern of the first partition and the second pattern of the first partition; etching the partially etched spacer material layer and the partially etched first hard mask material layer using the exposed first and second patterns of the first partition and the second partition as an etch mask to form a first hard mask pattern; and etching the etch-target layer using the first hard mask pattern as an etch mask to form an etch-target layer having a desired pattern.