Patent ID: 7361453
Filing Date: 2008-04-22
Classification: G03F,H01L

Abstract:
1. A method of manufacturing a semiconductor device wherein a pattern is created in a material, the method comprising: covering the material with a lower mask layer; covering the lower mask layer with an upper mask layer; creating a first pattern on the upper mask layer via a lithographic mask; removing a part of the upper mask layer in dependency on the first pattern; creating, via the lithographic mask, a second pattern on the upper mask layer or on the lower mask layer at locations where the upper mask layer has been removed, the lithographic mask being displaced over a distance such that the second pattern is displaced with respect to the first pattern; removing a part of at least the lower mask layer in accordance with at least the second pattern; and removing a part of the material in accordance with remaining parts of the lower and the upper mask layers.