Patent ID: 9223223
Filing Date: 2015-12-29
Classification: G03F

Abstract:
1. An apparatus for forming patterns by employing polarization interference in a laser scanning method, the apparatus comprising: a laser generator configured to generate a laser beam; a polarization plate configured to polarize the generated laser beam into an S wave and a P wave having polarization directions orthogonal to each other; a calcite wave plate configured to refract at least one of the S wave and the P wave, polarized by the polarization plate, in a specific direction so that paths of the S wave and the P wave are spaced apart from each other; an analyzer configured to make the polarization directions of the S wave and the P wave, having the paths spaced apart from each other by the calcite wave plate, coincident with each other; an exposure lens configured to transmit the beams, having the polarization directions made coincident with each other by the analyzer, and scan the beams on a photosensitive film on a substrate; an exposure head configured to have the polarization plate, the calcite wave plate, the analyzer, and the exposure lens disposed therein; an X stage configured to move the exposure head in an X-axis direction; a substrate mounting unit configured to have the substrate mounted thereon; and a rotation stage configured to move the substrate mounting unit around a Z axis which is a vertical axis, wherein the beams passing through the exposure lens interfere with each other to form an interference laser beam scanned on the photosensitive film, and having a reduced line width in a specific direction.