METHOD OF DROP EJECTION USING WIDE HEATER ELEMENTS IN PRINTHEAD

摘要

A method of ejecting drops of an ejectable liquid from a printhead is provided. The printhead has nozzles, a bubble forming chambers and heater elements. Each heater element is an elongate strip suspended between corresponding electrodes on opposite sides of the chambers and having a cross-section with a lateral dimension different than that of each other strip of the corresponding chamber and at least triple the thickness of that strip. The thickness of each strip is less than 0.3 microns. The heater elements and associated electrodes are arranged so that the electrodes are non-coincident with the electrodes of the other heater elements. The method includes heating the heater elements above the boiling point of the bubble forming liquid to form a gas bubble that causes ejection of a drop of an ejectable liquid from the nozzle, and supplying a volume of the ejectable liquid equivalent to the ejected drop.