Patent ID: 6717167
Filing Date: 2004-04-06
Classification: B82Y,G02B,H01L

Abstract:
An apparatus for manufacturing a semiconductor device having a crystal structure with three-dimensional periodical refractive index distribution, characterized in that said apparatus comprises:wafer hold means for integrally holding two semiconductor wafers each having one surface with at least one lattice layer having a two-dimensional structure being formed thereon with said lattice layers facing each other; a first light source for irradiating observation light onto said two semiconductor wafers being held integrally, said first light source is an infrared light source for outputting infrared light as said observation light; first detecting means for detecting a lattice image obtained by said observation light to thereby perform rough alignment between said semiconductor wafers; a second light source for irradiating laser light onto said two semiconductor wafers being held integrally; and second detection means for detecting a diffraction image obtained by said laser light to thereby perform fine alignment between said semiconductor wafers.