Patent ID: 8350187
Filing Date: 2013-01-08
Classification: B23K

Abstract:
1. An improved method for machining a feature in a workpiece with a laser machining system, said laser machining system including a laser operative to emit laser pulses, said laser pulses having laser pulse parameters and laser focal spots, each of said focal spots having focal spot parameters comprising spot shape and energy distribution, and said feature extending within the workpiece along a curved path, the improvement comprising: directing said laser pulses to impinge said workpiece at a plurality of overlapping laser focal spot positions along said curved path, wherein at least one of said laser focal spot parameters for each of said directed laser pulses is selected such that a cumulative laser radiation dose at one of the plurality of overlapping laser spot focal positions along the curved path is consistent with a cumulative laser radiation dose at another one of the plurality of overlapping laser spot focal positions along the curved path, thereby machining said feature in said workpiece.