Patent ID: 7602475
Filing Date: 2009-10-13
Classification: G02F

Abstract:
1. A lithography system, comprising: a polarized illumination source configured to provide polarized light; a birefringence-controllable optical element optically coupled to the polarized illumination source; a birefringence inducer coupled to the birefringence-controllable optical element and configured to induce birefringence on the birefringence-controllable optical element to provide polarization-retarded polarized light; a pattern generator optically coupled to the birefringence-controllable optical element; a linear polarizer optically coupled to the pattern generator and configured to (i) receive the polarization-retarded polarized light and (ii) modify intensity distribution of the polarization-retarded polarized light to provide modified polarization-retarded polarized light; and a projection system configured to project the modified polarization-retarded polarized light.