Patent ID: 8105951
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A method for fabricating a device pattern, comprising: forming a first pattern with a first density on a substrate, wherein the first pattern comprises a base portion along a first direction and at least two protruding portions along a second direction and each protruding portion connected to the base portion respectively, and the first direction intersects with the second direction, the first direction and the second direction are substantially parallel to a top surface of the substrate, and the base portion is positioned only at one end along the second direction of each protruding portion; forming a spacer on a sidewall of each protruding portion, wherein the spacers on the sidewall of each protruding portion do not contact the base portion, and the spacers between two adjacent protruding portions do not contact each other such that a gap is defined between the two adjacent protruding portions; and forming a second pattern on the substrate and located in the gap, such that a third pattern with a second density is formed by the first pattern and the second pattern.