Piezoelectric element
US12414473B2 · kind B2 · utility
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2References
12Claims
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Key dates
| Filing date | Dec 1, 2021 |
| Grant date | Sep 9, 2025 |
| Priority date | — |
| Expiry date | Jun 23, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/079
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A piezoelectric element includes, in sequence, a substrate, a lower electrode layer, a growth control layer, a piezoelectric layer including, as a main component, a perovskite-type oxide containing lead and an upper electrode layer. The growth control layer includes a metal oxide represented by MdN1-dOe, where M is composed of one or more metal elements capable of substituting in the perovskite-type oxide, 0<d<1, and when the electronegativity is X, 1.41X−1.05≤d≤A1·exp(−X/t1)+y0, where A1=1.68×1012, t1=0.0306, and y0=0.59958.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.