Patent ID: 8154000
Filing Date: 2012-04-10
Classification: H05G

Abstract:
1. An arrangement for generating EUV radiation based on a hot plasma using a liquid emitter material comprising: an emitter material supply unit comprising at least one reservoir vessel for the emitter material, the emitter material supply unit having at least a first pressure vessel and a second pressure vessel between the reservoir vessel and an injection device for generating a high emitter material pressure for an injection unit in that the pressure vessels are acted upon by a high-pressure gas system with a gas pressure in a megapascal range in order to maintain a constant emitter material pressure in the injection device, the emitter material supply unit comprising means for switching the high-pressure gas system from one pressure vessel to the other pressure vessel and for correspondingly alternately switching the injection unit to the constant emitter material pressure of the respective pressure vessel being pressurized, wherein at least one of the pressure vessels can be refilled with the emitter material from the reservoir vessel during continuous operation of droplet generation and plasma generation; an evacuated interaction chamber in which a focused, pulsed energy beam is directed to an interaction point; and the injection device for reproducibly supplying droplets of the emitter material at the interaction point so as to be synchronized with the pulsed energy beam in order to convert the droplets into hot plasma for EUV emission.