Patent ID: 7964819

Claim:
A method for selectively irradiating structures to be selectively processed by laser radiation on or within a semiconductor substrate using multiple laser beams, the structures being arranged in a plurality of substantially parallel rows extending in a generally lengthwise direction, the method comprising: propagating a plurality of laser beams along respective propagation paths having respective axes incident at respective locations on or within the semiconductor substrate at a given time; detecting a reflection of a laser beam off a structure to be selectively processed; adjusting a position of at least one of the axes based on the reflection; moving at least some of the plurality of laser beam axes substantially in unison in the lengthwise direction of the rows relative to the semiconductor substrate; and during the moving step, selectively irradiating structures using one or more of the plurality of laser beam in such a way as to appreciably change at least one property of the selected structures.