Patent ID: 7545080
Filing Date: 2009-06-09
Classification: H01L,Y10T

Abstract:
1. A piezoactuator with a monolithic multi-layered construction, comprising: at least one piezoelectric active partial stack, wherein the partial stack comprising piezoceramic layers arranged one above the other and electrode layers arranged between the piezoceramic layers, at least one piezoelectric inactive terminating region arranged above the piezoelectric active partial stack and at least one transition region arranged between the piezoelectric active partial stack and the terminating region, wherein the piezoelectric active partial stack, the terminating region and the transition region are connected with one another to form a monolithic total stack, and wherein the transition region comprises a transition region stack with transition region piezoceramic layers arranged one above the other and transition region electrode layers arranged between the transition region piezoceramic layers and the transition region piezoceramic layers and the transition region electrode layers being in a form and arranged on one another such that from transition region piezoceramic layer to transition region piezoceramic layer in the stack direction of the transition region, there is a rotation of a main axis of the poling vector and/or a rotation of a main axis of the electrical drive.