Patent ID: 6130009
Filing Date: 2000-10-10
Classification: B23K,B41J,G03H,Y10S

Abstract:
In a method for ablation of a matrix of nozzles on a substrate with controlled nozzle shapes and controlled center to center spacing from a beam of coherent light of a specific frequency for producing at least one nozzle array on the substrate, said method including the steps of:providing a plurality of masks, each said mask configured in a plane having a plurality of subapertures with each subaperture containing at least a portion of a computer generated hologram for producing converging coherent light of the specific frequency from the subaperture with image information from the subaperture to form a real image at a working distance from the mask having a profile for ablating the nozzles of specific shape and location on the substrate;holding the substrate at the working distance from the masks;holding the plurality of masks overlying the substrate to register the real images of the subapertures to the substrate to pattern the nozzles;dividing the coherent light of the specific frequency into multiple beams with one the beam intersecting each mask at at least one subaperture; and,scanning the coherent light source of the specific frequency for simultaneously causing each said beam of the multiple beams at each said mask to simultaneously scan a plurality of subapertures at least along one direction in the plane of the mask to produce on the substrate nozzles.