COMPOSITE PIEZOELECTRIC MULTILAYER ELEMENT AND METHOD OF MANUFACTURING SUCH AN ELEMENT,申请号EP19970900024-传众专利搜索

COMPOSITE PIEZOELECTRIC MULTILAYER ELEMENT AND METHOD OF MANUFACTURING SUCH AN ELEMENT

申请公布号：EP0815600(A1)

申请号：EP19970900024

申请日期：1997.01.16

申请公布日期：1998.01.07

申请人：

KONINKLIJKE PHILIPS ELECTRONICS N.V.

发明人：FRANSEN, BENEDICTUS, CORNELIS, HENDRIKUS;OPPEDIJK, BAUKE;DIDDEN, HENRICUS, ADRIANUS, CORNELIS

分类号：H01L41/09;G05D3/00;H01L41/083;H01L41/22;(IPC1-7):H01L41/083

主分类号：H01L41/09

摘要：The invention relates to a composite piezoelectric multilayer element of which, in operation, only a part is piezoelectrically active, and to a method of manufacturing such an element. In accordance with the invention, the piezoelectrically inactive part has larger dimensions in one or more directions than the part which, in operation, is piezoelectrically active when a voltage is applied across the electric connections of the element. Moreover, the inactive part is built up of ceramic foils and electrode layers whose thickness and composition correspond to the thickness and composition of the part of the element which, in operation, is piezoelectrically active. The element in accordance with the invention can be manufactured in a simple and inexpensive manner.