Ink jet printer head and method for fabricating the same including a piezoelectric device with a multilayer body having a pair of high rigidity plates provided on the side walls

摘要

A piezoelectric device including an insulating substrate and a displacement layer formed on the insulating substrate including a first electrode, a piezoelectric layer and a second electrode laid on the insulating substrate in the stated order, a part of a surface of the piezoelectric device in a region where the first and the second electrodes overlap each other is projected out of the rest part of the surface. The multi-layer body has a pair of high rigidity plates each provided on a side-wall for securing the multi-layer body.