Patent ID: 8877647
Filing Date: 2014-11-04
Classification: H01L

Abstract:
1. A patterning method, comprising: providing a substrate having a first area and a second area; sequentially forming a target layer, a sacrificial layer and a first mask layer on the substrate, wherein the first mask layer has a plurality of first mask patterns located in the first area and a plurality of second mask patterns located in the second area; removing a portion of the sacrificial layer by using the first mask layer as a mask, so as to form a plurality of sacrificial patterns; removing the first mask layer; forming a spacer on a sidewall of each of the sacrificial patterns; removing the sacrificial patterns; at least removing the spacers in the second area; forming a second mask layer on the substrate to cover a portion of the first area adjacent to the second area; removing a portion of the target layer by using the second mask layer and the remaining spacers as a mask, so as to form a plurality of first target patterns in the first area and form a second target pattern in the portion of the first area adjacent to the second area; and removing the second mask layer and the remaining spacers.