Patent ID: 8697339
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a polysilicon material layer over a workpiece; forming a first anti-reflective coating over the polysilicon material layer; disposing a first photosensitive material over the first anti-reflective coating; exposing the first photosensitive material and the first anti-reflective coating using a first lithography mask, the first lithography mask comprising a first pattern; forming the first pattern in the first photosensitive material; transferring the first pattern in the polysilicon material layer; removing the first photosensitive material and the first anti-reflective coating; forming a second anti-reflective coating directly over the polysilicon material layer patterned with the first pattern; disposing a second photosensitive material over the second anti-reflective coating; exposing the second photosensitive material using a second lithography mask, the second lithography mask comprising a second pattern, the second pattern comprising a different pattern than the first pattern; forming the second pattern in the second photosensitive material; forming a polymer material along sidewalls of the second pattern forming a second extended pattern; etching the second extended pattern in the second anti-reflective coating; and transferring the second extended pattern in the polysilicon material layer, the polysilicon material layer patterned with the first pattern and the second extended pattern.