Hybrid band-pass filter with integrated passive device and acoustic resonator
US12316302B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 28, 2022 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Jun 26, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/1758
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A novel hybrid band-pass filter is realized using semiconductor integrated hybrid technology, and includes two acoustic resonance units, and one IPD filter unit. The filter unit may be implemented as a high-pass filter, a low-pass filter, or a band-pass filter. The two acoustic resonance units and the IPD filter unit are arranged on a matching substrate, for example, by way of flip-chip technology and welding of electrodes, and a polymer filled shell is formed external to and surrounding the acoustic resonance units and the IPD filter unit to prevent oxidation and to maintain integrity of the weld points. The first acoustic resonance unit is connected with an input terminal of the IPD filter through a matching inductor, an output terminal of the IPD filter is connected with the second acoustic resonance unit through a matching inductor, and finally, the two acoustic resonance units and the IPD filter unit are integrated on the matching substrate. The band-pass filter is characterized by low loss, high suppression, wide passband and high rectangular coefficient, and also has the advantages of small size, high yield, good batch consistency and suitability for batch production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.