Patent ID: 8969839
Filing Date: 2015-03-03
Classification: G03F,H01J,H05G,H05H,Y10T

Abstract:
1. A method for generating irradiation targets in an extreme ultraviolet (EUV) light source having a plasma generating system, the plasma generating system includes a nozzle configured for ejecting droplets of a target material and a subsystem having an electro-actuable element producing a modulation waveform to cause disturbance to the droplets thereby causing at least some of the droplets to coalesce into at least one of the irradiation targets, the plasma generating system further includes a laser producing a beam for irradiating the irradiation targets to generate an EUV-producing plasma, comprising: providing the nozzle; providing the electro-actuable element; and biasing the electro-actuable element against the nozzle to enable transfer of the disturbance to the droplets while permitting relative movement between the electro-actuable element and the nozzle.