Multilayer body that includes piezoelectric body
US11162829B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | May 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B2201/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A multilayer body includes a piezoelectric body and a first acoustic matching layer in direct or indirect contact with the piezoelectric body. The first acoustic matching layer includes a plastic foam containing a plurality of closed pores. An average pore size of the closed pores is not smaller than 1 μm and not larger than 100 μm. The first acoustic matching layer has a density of not less than 10 kg/m3 and not more than 100 kg/m3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.