Formation of linear aperture in plastics-fibre reinforced substrate for conductor plate involves guiding laser beam to flat processing area and then forward to one edge before returning to starting point and then onward to second edge

摘要

The method involves guiding a laser beam first at a distance from an edge of the substrate (1) to a flat processing area of the substrate between two edges of the web (4) of the conductor plate (2) and from there moving the laser beam forwards towards the edge. After forming the linear aperture between the starting point of the processing area and a first edge the laser beam is directed back to the starting point and then moved towards a second edge remote from the first. The laser beam preferably moves from the inner area towards the adjoining edge. A suction current at the back removes the released particles from the aperture area.