Patent ID: 6835944
Filing Date: 2004-12-28
Classification: H05G

Abstract:
An extreme ultraviolet (EUV) radiation source for generating EUV radiation, said source comprising:a nozzle assembly, said nozzle assembly including a condenser chamber having a condenser for cryogenically cooling a gas target material to a liquid target material, said nozzle assembly further including a holding chamber receiving the liquid target material and holding the target material under pressure to allow entrained gas bubbles in the liquid target material to be converted to liquid, said nozzle assembly further including an outlet opening coupled to the holding chamber, said outlet opening receiving the liquid target material from the holding chamber and emitting a stable stream of the target material from the nozzle assembly towards a target area; and a laser, said laser directing a laser beam to the target area to vaporize the target material and create a plasma that emits the EUV radiation.