Patent ID: 7953129
Filing Date: 2011-05-31
Classification: G03F,H01S,H04J

Abstract:
1. An exposure device, comprising: a laser light source device; an illumination optical system for irradiating laser lights emitted from the laser light source device on a reticle; and a projection optical system for condensing the laser lights transmitted through the reticle on a semiconductor wafer and forming an image of the reticle, and the laser light source device comprising, a first laser light source section comprising M number of laser light sources, where the m-th laser light source emits a laser light having a frequency shifted from a first fundamental frequency by a a second laser light source section comprising M number of laser light sources, where the m-th laser light source emits a laser light having a frequency shifted from a second fundamental frequency by b a first optical multiplexer for emitting a first fundamental wave by approximately coaxially superimposing M number of laser lights emitted from the first laser light source section; a second optical multiplexer for emitting a second fundamental wave by approximately coaxially superimposing M number of laser lights emitted from the second laser light source section; and a wavelength conversion optical system, comprising a first wavelength conversion device for generating an A-harmonic wave, of which frequency corresponds to A times of the first fundamental wave, a second wavelength conversion device for generating a B-harmonic wave, of which frequency corresponds to B times of the second fundamental wave, and a third wavelength conversion device for receiving light of the A-harmonic wave and the B-harmonic wave, and generating a sum frequency thereof by sum frequency generation, the laser light source device being characterized in that Expression A·a