Patent ID: 9054147
Filing Date: 2015-06-09
Classification: C23C,G01B,H01L

Abstract:
1. A method of carrying out alignment between a substrate and a mask, the substrate and the mask having respective alignment marks, the method comprising: irradiating the substrate with laser light and to measure vibrations of the substrate in a direction of gravity to produce vibration data; producing an antiphase vibrational wave, based on the corresponding vibration data produced in the irradiating step; applying the antiphase vibrational wave to the substrate, thereby reducing the vibrations of the substrate in the direction of gravity; at a time when the measured vibrations of the substrate in the direction of gravity fall within a predetermined value that is set in advance, taking images of relative positions of the respective alignment marks provided on the substrate and the mask, from the substrate side, in the direction of gravity, and producing data corresponding to the obtained images; calculating an amount of movement of one of the substrate and the mask in a horizontal direction, based on the data corresponding to the obtained images; and moving the one of the substrate and the mask, based on the calculated amount of movement.