Patent ID: 9711344
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A method of manufacturing a semiconductor device comprising the following steps of: (a) preparing a semiconductor wafer comprised of a top surface, a rear surface opposite to the top surface, and a lateral surface between the top surface and the rear surface; (b) forming a target film on the top surface of the semiconductor wafer; (c) applying a first insulating layer that is a first mask film on the top surface and the lateral surface of the semiconductor wafer to cover the target film; (d) eliminating a part of the first insulating layer formed on the lateral surface of the semiconductor wafer, by cleaning the semiconductor wafer; (e) performing water repelling processing on the first insulating layer, after the step (d); (f) applying a second insulating layer that is a second mask film on the semiconductor wafer, after the step (e); (g) transferring a predetermined pattern to the second insulating layer according to photolithography, to form the second mask film; (h) transferring the pattern of the second mask film to the first insulating layer, to form the first mask film; and (i) etching the target film, using the first mask film.