Patent ID: 7687740
Filing Date: 2010-03-30
Classification: B23K,H01L

Abstract:
1. A method for processing a semiconductor substrate having a plurality of structures to be selectively irradiated with multiple laser beams, the structures being arranged in a plurality of substantially parallel rows extending in a generally lengthwise direction, the method comprising: generating a first laser beam that propagates along a first laser beam axis that intersects a first target location on or within the semiconductor substrate; generating a second laser beam that propagates along a second laser beam axis that intersects a second target location on or within the semiconductor substrate, the second target location being offset from the first target location in a direction perpendicular to the lengthwise direction of the rows by some amount such that, when the first target location is a structure on a first row of structures, the second target location is a structure or between two adjacent structures on a second row distinct from the first row; and moving the semiconductor substrate relative to the first and second laser axes in a direction approximately parallel to the rows of structures, so as to pass the first target location along the first row to irradiate for a first time selected structures in the first row, and so as to simultaneously pass the second target location along the second row to irradiate for a second time structures previously irradiated by the first laser beam during a previous pass of the first target location along the second row.