Printer system having wide heater elements in printhead

摘要

A printer system is provided having a printhead which has nozzles, a bubble forming chamber corresponding to each nozzle, and heater elements disposed in each chamber each configured for thermal contact with a bubble forming liquid such that heating heater elements to a temperature above the boiling point of the bubble forming liquid forms a gas bubble that causes the ejection of a drop of an ejectable liquid through the nozzles. Each heater element is an elongate strip suspended between corresponding electrodes on opposite sides of the chamber. Each strip has a cross-section with a lateral dimension different than that of each other strip of the corresponding chamber and at least triple that of the thickness of that strip. The thickness of each strip is less than 0.3 microns. The heater elements and electrodes are arranged so that the electrodes are non-coincident with the electrodes of the other heater elements.