Patent ID: 9126407
Filing Date: 2015-09-08
Classification: B41J,H01L

Abstract:
1. A liquid discharge apparatus comprising: a flow passage structure which is formed with liquid flow passages including a plurality of nozzles and a plurality of pressure chambers communicated with the plurality of nozzles respectively; and a piezoelectric actuator which is joined to the flow passage structure, the piezoelectric actuator including: a first piezoelectric layer which covers the plurality of pressure chambers; a second piezoelectric layer which covers the plurality of pressure chambers and which is arranged to be overlapped on a flow passage structure side of the first piezoelectric layer; a plurality of first electrodes which are arranged on a surface of the first piezoelectric layer on a side opposite to the second piezoelectric layer and which are opposed to the plurality of pressure chambers respectively; a second electrode which is arranged between the first piezoelectric layer and the second piezoelectric layer; a first conductive pattern which is arranged in an area disposed on an outer side of the plurality of first electrodes on the surface of the first piezoelectric layer on the side opposite to the second piezoelectric layer; a conducting portion which is arranged in a through-hole penetrating through the first piezoelectric layer and which allows the second electrode and the first conductive pattern to be in conduction, the through-hole being formed in the first conductive pattern; and a second conductive pattern which is arranged between the through-hole and the plurality of first electrodes on the surface of the first piezoelectric layer on the side opposite to the second piezoelectric layer.