Patent ID: 9049774
Filing Date: 2015-06-02
Classification: H05G

Abstract:
1. An EUVL light source system, comprising: a laser configured to provide laser pulses and to excite an EUV light source material to emit EUV light, wherein a plurality of molten droplets is generated to fly out of the EUV light source material; a collector comprising a plurality of reflective mirrors each movable, configured to at least partially surround the EUV light source material and positioned to guide the EUV light into a desired direction; a cooling assembly configured to wrap around the collector along the EUV light in the desired direction, wherein at least a first portion of the plurality of molten droplets reaches and condenses on a surface of the cooling assembly; and a mirror control system synchronized to operate with the laser and configured to control the plurality of reflective mirrors in a reflective state for reflecting the EUV light and in a non-reflective state for allowing at least a second portion of the plurality of molten droplets to pass through adjacent reflective mirrors for preventing contamination from the molten droplets.