Apparatus and method for treating substrate

Abstract

The inventive concept provides a mask treating apparatus. The mask treating apparatus includes a support unit configured to support and rotate a mask, the mask having a first pattern within a plurality of cells thereof and a second pattern outside regions of the plurality of cells; a heating unit including a laser irradiation module and a moving module, the laser irradiation module having a laser irradiator for irradiating a laser light to the second pattern, the moving module configured to change a position of the laser irradiation module; and a controller configured to control the support unit and the heating unit, and wherein when a treating position is divided into four equal parts from a first quadrant to a fourth quadrant based on a center of the mask, the laser irradiator is positioned at the fourth quadrant and the first quadrant in a direction linearly moving from a standby position to the treating position, positioned at the third quadrant in a direction which is perpendicular to the fourth quadrant, and positioned at the second quadrant in a direction which is perpendicular to the first quadrant, and wherein the controller controls a rotation of the support unit so the second pattern is positioned at the fourth quadrant.