Patent ID: 9057954
Filing Date: 2015-06-16
Classification: G03F,H05G

Abstract:
1. An apparatus for creating an extreme ultraviolet (EUV) light, the apparatus comprising: a droplet-supplying unit supplying a droplet in a first direction from which the EUV light is created; a laser-irradiating unit irradiating a laser to the droplet supplied from the droplet-supplying unit to create the EUV light; a light-concentrating unit concentrating the EUV light created by the laser-irradiating unit; a guiding unit guiding the droplet to a position where the laser is irradiated, the guiding unit having at least one gas-spraying hole that sprays a gas to a space between the droplet-supplying unit and the laser-irradiating unit to form a gas curtain to surround the droplet; and a gas-spraying unit for spraying a gas from the light-concentrating unit to the droplet in a second direction substantially perpendicular to the first direction to prevent particles generated from the droplet from being adhered to the light-concentrating unit, wherein the pressure of the gas sprayed from the gas-spraying unit at the gas curtain is lower than the pressure of the gas sprayed from the gas-spraying hole.