Patent ID: 9653293
Date: 2017-05-16
CPC Classifications: G03F,H01L

Claim:
1. A method of manufacturing a semiconductor device, the method comprising: forming a first exposure mask of a first pattern and a second exposure mask of a second pattern; coating a photosensitive material on a workpiece; a first exposing step including exposing the photosensitive material using the first exposure mask; a first developing step including performing a positive-tone development on the photosensitive material using a first developer after the first exposing step; a second exposing step including exposing the photosensitive material using the second exposure mask after the first developing step; and a second developing step including performing a negative-tone development on the photosensitive material using a second developer after the second exposing step, wherein the forming includes forming the first exposure mask and the second exposure mask in a manner that, when the first exposure mask and the second exposure mask are superimposed, a light transmitting portion of the first exposure mask and a light shielding portion of the second exposure mask are free of being overlapped with each other, and the light transmitting portion of the first exposure mask and the light shielding portion of the second exposure mask are configured to allow a part of an intermediate exposed region that is exposed at the first exposing but not developed at the first developing to be developed at the second developing.