Perforated piezoelectric hydrophone, array comprising a plurality of hydrophones and method for making said hydrophone
US10644223B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2015 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Jun 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/302
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric hydrophone with perforations and an array comprising a plurality of hydrophones comprises a stack of layers that are bonded to one another, the layers comprising at least one piezoelectric layer and a plurality of layers referred to as rigid layers, at least two of which are electrode layers, the rigid layers exhibiting a stiffness perpendicularly to the direction of stacking, which stiffness is higher than the stiffness of the piezoelectric layer perpendicularly to the direction of stacking. At least one piezoelectric layer comprises a central zone comprising a set of perforations that pass through the piezoelectric layer solely along the direction of stacking, each perforation being closed tight by closure elements comprising portions of two of the rigid layers, the two rigid layers extending over the entirety of the surface of the central zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.