Patent ID: 6286951
Filing Date: 2001-09-11
Classification: B41J

Abstract:
A method of forming a printhead comprising the steps of:providing first and second silicon substrates;anisotropically etching a set of parallel grooves and a first recess on one surface of the first substrate, the first recess forming an internal ink chamber;anisotropically etching a set of parallel openings in the one surface of the first substrate of a predetermined pore size between the internal ink chamber and the set of parallel grooves, the set of parallel openings forming a first filter array portion;forming an array of heating elements and addressing electrodes on one surface of the second silicon substrate;depositing an insulating layer on the one surface of the second silicon substrate;patterning the insulating layer to expose portions of the heating elements and to expose a set of openings forming a second filter array portion of a predetermined pore size; andaligning, mating and bonding the one surface of the first substrate to the one surface of the second substrate so that the second filter array portion is positioned in fluid communication with and between the internal ink chamber and the set of parallel grooves to form a printhead having a plurality of ink nozzle channels of a predetermined channel width that receive ink that has been filtered through at least one of the first and second filter array portions.