Workpiece deformation small narrow kerf

The laser beam is focused to a small spot, so that the focal point to achieve high power density. Then heat the beam input material far exceed reflection, conduction or diffusion part, the material is heated to vaporization degree quickly evaporated to form holes. With the beam and the material is relatively linear movement, so that the holes are continuously formed through a narrow slit. Trimming heat-affected small, basically no deformation of the workpiece.