Patent ID: 7009138
Filing Date: 2006-03-07
Classification: B23K,H05K

Abstract:
1. A laser processing method, comprising: a beam-splitting step for splitting a single laser beam into a plurality of laser beams including a zero-order diffracted laser beam, by diffracting the single laser beam by a diffractive optical element; a direction setting step of turning an array of focused beam spots obtained from the plurality of laser beams about the zero-order diffracted laser beam to align the array of focused beam spots in accordance with a direction of an array of a plurality of processing points of a work; an interval setting step for causing an interval between the focused beam spots in the array to be in agreement with an interval between the plurality of processing points in the array, by adjusting the distance from the diffractive optical element to the work; and a processing step for increasing the intensity of the plurality of laser beams to such an intensity that is necessary to process the work, and processing the work by simultaneously irradiating the plurality of processing points with the focused beam spots in the array having the direction and the interval determined in the preceeding steps; wherein the respective setting steps are executed after the zero-order diffracted laser beam, which has passed through the diffractive optical element, is caused to be in agreement with one of the processing points.