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US 8,569,933 B2Granted
Piezoelectric multilayer component
AssigneeEpcos AG
InventorsOliver Dernovsek, Alexander Glazunov
Life of this patent
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Abstract
A piezoelectric multilayer component includes a stack of sintered piezoelectric layers and inner electrodes that are arranged there between. A piezoelectric layer includes at least one piezoelectric film. At least one of the piezoelectric films is designed as a weakening film, wherein the thickness of the weakening film is substantially smaller than the thickness of at least one of the other piezoelectric films.
Claims20
A piezoelectric multilayer component, comprising:
- a stack of sintered piezoelectric layers;
- and
- internal electrodes arranged between the piezoelectric layers;
- wherein each piezoelectric layer comprises at least one piezoelectric sheet,
- wherein at least one of the piezoelectric sheets is embodied as a weakening sheet having a lower crack resistance than at least one other piezoelectric sheet,
- wherein a thickness of the weakening sheet is significantly less than a thickness of the at least one other piezoelectric sheet,
- wherein the piezoelectric sheets contain a ceramic material, and
- wherein the ceramic material of the weakening sheet differs from the ceramic material of the at least one other piezoelectric sheet in grain size.
5 more elements
A piezoelectric multilayer component, comprising:
- a stack of sintered piezoelectric layers;
- and
- internal electrodes arranged between the piezoelectric layers;
- wherein each piezoelectric layer comprises at least one piezoelectric sheet,
- wherein at least one of the piezoelectric sheets is embodied as a weakening sheet having a lower crack resistance than at least one other piezoelectric sheet,
- wherein a thickness of the weakening sheet is significantly less than a thickness of the at least one other piezoelectric sheet,
- wherein the piezoelectric sheets contain a ceramic material,
- wherein the ceramic material of the weakening sheet differs from the ceramic material of the at least one other piezoelectric sheet in a content of lead oxide, and wherein a mole percentage of lead in the ceramic material of the weakening sheet is less than a mole percentage of lead in the ceramic material of the at least one other piezoelectric sheet.
5 more elements
Dependencies are inferred from the claim text.