Patent ID: 8053145

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: splitting a laser beam emitted from a laser oscillator into a first laser beam and a second laser beam; forming a fringe pattern in a holographic recording medium by illuminating the holographic recording medium with the first laser beam through a mask and illuminating the holographic recording medium with the second laser beam; forming a resist over a film formed over a first substrate; and illuminating the resist with a third laser beam from the laser oscillator through the holographic recording medium, wherein the mask is a second substrate having a light-shielding film formed over its surface, wherein a thickness of the light-shielding film is in a range of 0.3 to 10 μm, inclusive, wherein a wavelength of the third laser beam is shorter than wavelengths of the first laser beam and the second laser beam, wherein the laser beam is converted into a harmonic by a first nonlinear optical element before the laser beam is split into the first laser beam and the second laser beam, and wherein the third laser beam is obtained by removing the first nonlinear optical element and inserting a second nonlinear optical element.