Piezoelectric element for an automatic frequency control circuit, oscillating mechanical system and device comprising the same, and method for manufacturing the piezoelectric element
US10983479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2018 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/883
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric element for an automatic frequency control circuit, the element including: a balance spring formed of a strip of piezoelectric material; at least a first electrode, configured to be connected to the circuit and being disposed on all or part of one side of the strip; at least a second electrode configured to be connected to the circuit and being disposed on all or part of another one side of the strip distinct from the one side on which the first electrode is disposed, the piezoelectric material being a piezoelectric crystal or a piezoelectric ceramic; and at least two discontinuous layers of an insulating material, each discontinuous layer being disposed on at least one side of the strip and separating the first electrode from the second electrode, the layers of insulating material being distributed on predetermined portions of the balance spring substantially forming arcs in a predetermined angular periodicity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.