Patent ID: 8698115
Filing Date: 2014-04-15
Classification: H05G

Abstract:
1. A light source device, comprising: a cavity resonator having a window; a hollow member which is formed of an electrically isolating, nonmagnetic material, and which is disposed in an internal space of the cavity resonator; and an electromagnetic wave supply unit configured to form a standing wave by supplying an electromagnetic wave to the internal space of the cavity resonator, wherein the light source device is configured to repeatedly implement, in alternate shifts, a first state in which the electromagnetic wave supply unit supplies an electromagnetic wave to the internal space of the cavity resonator to cause a rare gas or a mixed gas containing a rare gas, which exists in the hollow member, to absorb energy of the standing wave thereby to generate plasma and to raise an electron temperature thereof so as to emit extreme ultraviolet light, which is emitted from the plasma, out of the cavity resonator through the window, and a second state in which the electromagnetic wave supply unit stops the supply of the electromagnetic wave to the internal space of the cavity resonator thereby to extinguish the plasma.