Patent ID: 6139674
Filing Date: 2000-10-31
Classification: B41J,Y10T

Abstract:
A method for fabricating a filter element to prevent contaminants from entering an ink supply inlet of an ink jet printhead, comprising the steps of:positioning a thin polymer film in the output radiation path of an ablation laser,positioning a first mask between the laser and the film, the mask having a hole pattern having larger hole diameters than the desired hole size of the filter element,controlling the laser output so that slightly tapered cavities are formed in a portion of the polymer film, the portion conforming in size to the size of the filter element,positioning a second mask between the laser and the film, the second mask having a hole pattern sized to create the desired hole size of the filter element,controlling the laser output so that the laser output is directed into said cavities forming a plurality of tapered holes through the base of each said cavity forming the filter element andbonding the filter element to the ink supply inlet.