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

Claim 0:
1. A photolithography method, comprising:
dispensing a first liquid toward a target layer through a nozzle at a first distance from the target layer;
capturing an image of the first liquid during the dispensing of the first liquid;
comparing the image with a reference image of the first liquid to obtain a comparison dataset;
moving the nozzle such that the nozzle is at a second distance from the target layer, wherein the second distance is different from the first distance, and wherein the first distance and the second distance are sensed by a distance sensor;
dispensing a second liquid toward the target layer through the nozzle at the second distance from the target layer; and
patterning the target layer after dispensing the first liquid and the second liquid.