Patent ID: 6927854
Filing Date: 2005-08-09
Classification: G03F

Abstract:
1. A projection exposure device comprising: a photo mask depicted with a pattern of a circuit; a stage for supporting an exposure object onto which the pattern of the photo mask is exposed; a position adjustment device for adjusting the positional relationship between said photo mask and said exposure object by moving either said photo mask or stage, or both of them; an optical projection system for exposing the pattern of the photo mask by an exposure wavelength onto said exposure object in a reduced or enlarged form; a mask mark set up on said photo mask and used for position alignment; an object mark set up on said exposure object and used for position alignment; a mask mark light source for irradiating said mask mark by rays of the same wavelength as said exposure wavelength; an object mark light source for irradiating said object mark by rays of a second wavelength which is different from the exposure wavelength; an exposure wavelength reflector installed in between said optical projection system and said exposure object, for reflecting rays of the same wavelength as said exposure wavelength while transmitting rays of the second wavelength which is different from said exposure wavelength; a mask mark photography device for photographing said mask mark by the rays reflected by the exposure wavelength reflector; an object mark photography device for photographing the object mark irradiated by the rays of said second wavelength which is transmitted through said exposure wavelength reflector; and a control device for aligning said photo mask with the exposure object by controlling said position adjustment device in reference to said photographed mask mark and object mark.