Lateral bulk acoustic wave filter
US11381220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2020 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Aug 21, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/871
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Acoustic wave filter devices is disclosed. The device includes a piezoelectric layer, an input electrode and an output electrode located on a top surface of the piezoelectric layer and physically separated from one another, and a counter electrode having a top surface connected to a bottom surface of the piezoelectric layer. The input and output electrodes each include a base and at least one extension extending from the base. The at least one extension of the input electrode extending alongside and in a generally opposite direction to and separated by a gap width from an adjacent extension of the at least one extensions of the output electrode. In some embodiments, the at least one extension of the input or output electrodes has a width that can changes from a first end of the at least one extension to a second end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.