Title:
PIEZOELECTRIC COMPONENT AND METHOD FOR THE PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO2003061022
Kind Code:
A3
Abstract:
The invention relates to a piezoelectric component comprising a stack (1) of piezoelectric layers (2) lying on top of each other and electrode layers (3a, 3b) arranged between said piezoelectric layers (2). The electrode layers (3a, 3b) inside the stack (1) have a central segment (4) and an end segment (6) bordered by the inside of a vertical end area (5) of the stack (1). The end segments (6) of the electrode layers (3a, 3b) are surrounded by a first piezoelectric material (7), the relative extension of which is smaller than the relative extension of a second piezoelectric material (9) arranged in a central area (8) between two adjacent electrode layers (3a, 3b). The invention also relates to a method for producing said piezoelectric component. The inventive component has the advantage of reducing the mechanical stress near the ends of the inner electrodes, resulting in a longer life cycle for the component.
Inventors:
FLORIAN HEINZ (AT)
RAGOSSNIG GEB GANSBERGER SIGRI (AT)
RAGOSSNIG GEB GANSBERGER SIGRI (AT)
Application Number:
PCT/DE2002/004249
Publication Date:
December 24, 2003
Filing Date:
November 18, 2002
Export Citation:
Assignee:
EPCOS AG (DE)
FLORIAN HEINZ (AT)
RAGOSSNIG GEB GANSBERGER SIGRI (AT)
FLORIAN HEINZ (AT)
RAGOSSNIG GEB GANSBERGER SIGRI (AT)
International Classes:
H01L41/083; H01L41/187; H01L41/273; H02N2/00; (IPC1-7): H01L41/083; H01L41/24; H01L41/187
Foreign References:
| US4978881A | 1990-12-18 | |||
| US5614044A | 1997-03-25 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 05 14 September 2000 (2000-09-14)
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 06 22 September 2000 (2000-09-22)
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 06 22 September 2000 (2000-09-22)
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