Patent · US Active

Surface-acoustic-wave (SAW) filter with a compensation layer having multiple densities

US12341489B2 · kind B2 · utility

0Cited by

0References

30Claims

0Family size

Assignee

RF360 Singapore Pte. Ltd. · SG

Inventors

Marc Dietrich · Gießen, DE
Ingo Bleyl · Munich, DE
Matthias Knapp · Munich, DE
Guenter Scheinbacher · Baldham, DE
Benno Blaschke · Munich, DE

Key dates

Filing date	Sep 13, 2021
Grant date	Jun 24, 2025
Priority date	—
Expiry date	Mar 24, 2044

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/64
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An apparatus is disclosed for a surface-acoustic-wave filter with a compensation layer having multiple densities. In an example aspect, the apparatus includes at least one surface-acoustic-wave filter with a piezoelectric layer, a substrate layer, and a compensation layer positioned between the piezoelectric layer and the substrate layer. The compensation layer includes a first portion having a first density and a second portion having a second density. The second density is greater than the first density. The first portion is positioned closer to the piezoelectric layer as compared to the second portion. The second portion is positioned closer to the substrate layer as compared to the first portion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.