Patent ID: 11940738
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 18:
19. A method, comprising:
outputting a plurality of droplets with a droplet generator;
generating extreme ultraviolet radiation by irradiating the droplets with a laser at an irradiation location between the droplet generator and the droplet receiver;
inducing a net electric charge in the droplets by applying a first voltage to a charge electrode positioned adjacent to a path of the droplets between the irradiation location and the droplet receiver;
generating, with a droplet sensor positioned within the droplet receiver, sensor signals indicative of a speed of the droplets within the droplet receiver;
reducing a speed of the droplets by applying a second voltage to a counter electrode positioned within the droplet receiver downstream from the charge electrode;
collecting the droplets in the droplet receiver; and
adjusting the second voltage in response to the sensor signals.