Patent ID: 8450638
Filing Date: 2013-05-28
Classification: B23K

Abstract:
1. A laser scribing method comprising: forming on a workpiece a plurality of beam spots arranged in a state being separated from one another along the scribing direction, and forming a linear scribed groove on the workpiece by moving the plurality of beam spots in the scribing direction, wherein the plurality of beam spots are obtained by splitting a laser beam of a single ray bundle into laser beams of a plurality of ray bundles by a birefringent element and focusing each of the laser beams of the plurality of ray bundles, the beam spots are moved in the scribing direction while carrying out pulse oscillation of the laser beam to form new holes so as to be contiguous to the holes formed in advance, the beam spots each have a diameter of 1 μm to 200 μm, and the distance between centers of the beam spots that are adjacent to each other in the plurality of beam spots is from two times to ten times the spot diameter.