Patent ID: 8217304
Filing Date: 2012-07-10
Classification: B23K,H01L,H05K

Abstract:
1. A method for selectively irradiating structures on or within a semiconductor substrate using a plurality of laser beams, the structures being arranged in a row extending in a generally lengthwise direction, the method comprising: generating a first laser beam that propagates along a first laser beam axis that intersects the semiconductor substrate; generating a second laser beam that propagates along a second laser beam axis that intersects the semiconductor substrate; simultaneously directing the first and second laser beams onto distinct first and second structures in the row; and, during the directing, moving the first and second laser beam axes relative to the semiconductor substrate substantially in unison in a direction substantially parallel to the lengthwise direction of the row, so as to selectively irradiate structures in the row with the first and second laser beams simultaneously; and during the moving step, dynamically adjusting the relative spacing between incident locations of the first and second laser beam axes.