Patent ID: 11959864
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 4:
5. The photolithography method of claim 1, further comprising:
after dispensing the second liquid, moving the nozzle such that the nozzle is at a third distance from the target layer, wherein the third distance is different from the first distance and the second distance, and wherein the third distance is sensed by the distance sensor;
dispensing a third liquid toward the target layer through the nozzle at the third distance from the target layer;
curing the third liquid to form a tri-layer photoresist;
patterning the tri-layer photoresist; and
etching the target layer using the patterned tri-layer photoresist as an etch mask.