Ultrasonic device and ultrasonic apparatus
US11018291B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Dec 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrasonic device includes a vibration portion, a first electrode, a piezoelectric body, and a second electrode which are laminated in this order in a laminate direction, in which an outer circumferential edge of the first electrode is larger than an outer circumferential edge of the piezoelectric body in a plan view across the laminate direction, in which the piezoelectric body includes an active portion that is provided in the vibration portion, and an extraction portion that is connected to the active portion and is provided over the inside and the outside of the vibration portion, in which a width dimension of the extraction portion is smaller than a width dimension of the active portion, and in which the second electrode is provided on the active portion and the extraction portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.