Patent ID: 7679274
Filing Date: 2010-03-16
Classification: H01L,Y10T

Abstract:
1. A piezo actuator in a monolithic multilayered design, comprising: at least one piezoclectrically active stack, wherein the stack comprises stacked piezoceramic layers and electrode layers arranged between the piezoceramic layers, at least one piezoelectrically inactive terminating region arranged above the piezoclectrically active stack, and at least one transition region arranged between the piezoclectrically active stack and the terminating region, wherein the piezoelectrically active stack, the terminating region and the transition region are joined together to form a monolithic total stack, and wherein the transition region comprises stacked transition-region piezoceramic layers and transition-region electrode layers arranged between the transition-region piezoceramic layers, and the transition-region piezoceramic layers and the transition-region electrode layers are in a form and are arranged on one another such that from transition-region piezoceramic layer to transition-region piezoceramic layer in the stack direction of the transition region, one piezoelectrically active area per transition piezoceramic layer is successively changed, wherein adjacent transition-region electrode layers form an interdigital structure.