Patent ID: 6794723
Filing Date: 2004-09-21
Classification: G02B,H01J,H01L,Y10T

Abstract:
A matrix type piezoelectric/electrostrictive device comprising a plurality of substantially pillar-shaped piezoelectric/electrostrictive elements, each comprising a piezoelectric/electrostrictive substance and at least a pair of electrodes, said piezoelectric/electrostrictive elements being vertically provided on a surface of a thick ceramic substrate, such that said piezoelectric/electrostrictive device is driven by displacement of said piezoelectric/electrostrictive substance;wherein said piezoelectric/electrostrictive elements are integrally bonded to said ceramic substrate and independently arranged in two dimensions; wherein a respective one of said pair of electrodes is formed on a respective vertical side of said piezoelectric/electrostrictive substances; wherein a percentage of transgranularly fractured crystal grains is 10% or less for crystal grains at least on the sides of said piezoelectric/electrostrictive substance on which said electrodes are formed; and wherein said piezoelectric/electrostrictive substance forms a curved surface near a joined section between said piezoelectric/electrostrictive substance and said ceramic substrate.