Patent ID: 7749902
Filing Date: 2010-07-06
Classification: H01L,Y10S

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: (a) forming a first material layer having a first thickness on an object layer; (b) forming a second material layer having a second thickness on the first material layer; (c) forming first patterns of a third material layer having lines and space patterns on the second material layer; (d) forming first patterns of the second material layer by etching the second material layer using the first patterns of the third material layer as an etching mask; (e) forming first patterns of the first material layer by etching the first material layer exposed by the etching mask including the first patterns of the second material layer to have a third thickness that is smaller than the first thickness; (f) forming second patterns of the second material layer having a planarized top surface on the first patterns of the first material layer and the first patterns of the second material layer, a fourth thickness on the first patterns of the second material layer, and a fifth thickness on the first patterns of the first material layer having the third thickness; (g) forming second patterns of the third material layer having lines and space patterns in a direction perpendicular to the first patterns of the third material layer on the second patterns of the second material layer; (h) forming third patterns of the second material layer by etching the second patterns of the second material layer and the first patterns of the second material layer by a first depth that is smaller than the fifth thickness from the top surface of the second patterns of the second material layer using the second patterns of the third material layer as an etching mask; (i) forming second patterns of the first material layer by etching the first patterns of the first material layer that is exposed by the etching mask including the third patterns of the second material layer by the same depth as the first thickness; and (j) etching the object layer exposed by the etching mask including the second patterns of the first material layer.