Patent ID: 8993439
Filing Date: 2015-03-31
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a molding layer on a substrate; sequentially forming a first damascene mask layer and a first mask layer on the molding layer; forming a first mask layer pattern by etching the first mask layer; forming a first damascene pattern by partially etching the first damascene mask layer using the first mask layer pattern as a mask; forming a second damascene mask layer on the first mask layer pattern to bury the first damascene pattern; forming a second damascene pattern partially overlapping the first damascene pattern by etching the second damascene mask layer and the first mask layer pattern; connecting the first damascene pattern and the second damascene pattern by removing a portion of the first mask layer pattern exposed by the second damascene pattern; forming a third damascene mask layer on the second damascene mask layer to bury the second damascene pattern; and forming a trench extending from the first and second damascene patterns by etching the third, second, and first damascene mask layers and the molding layer using remaining portions of the first mask layer pattern.