Importance

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Abstract

A piezoelectric actuator for an ink jet printhead, including: a block body of piezoelectric material having a bottom face through which the mechanical energy of the actuator is transferred to a receiving member, said body having an active portion adjacent to the bottom face as well as an inactive portion; a layered structure of alternating signal electrodes and common electrodes arranged in the active portion substantially in parallel with the bottom face and separated by layers of the piezoelectric material; a layered structure of alternating auxiliary electrodes and common electrodes arranged in the inactive portion, substantially in parallel with the bottom face and separated by layers of the piezoelectric material; at least one signal lead electrode formed on a first side face of said block body of piezoelectric material and interconnecting the signal electrodes; a ground lead electrode formed on a second side face opposite to the first side face and interconnecting the common electrodes; and an auxiliary lead electrode interconnecting the auxiliary electrodes, wherein the auxiliary lead electrode is formed on a third side face of the block body.

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First Claim