5G BAW Filter: World's first 5 GHz LiNbO3 BAW Solidly Mounted Resonator
What's the techno?
5G-enabled smartphones operate on up to 50 frequency bands. They rely on band pass filters, a passive component that selects the appropriate frequency band within the full RF spectrum.
CEA-Leti introduces the world's first BAW-SMR (Bulk Acoustic Waves-Solidly Mounted Resonator), a filter technology based on piezoelectric materials that operates in 5G's frequency band N79 (4500-5000 MHz) using LiNb03, a novel piezoelectric material.
Applications :
This BAW-SMR filter technology contributes to developing and enabling:
What's new?
Currently, 5G smartphones use bulky LTCC filters above 4GHz. This new BAW-SMR filter technology is addressing for the first time filtering frequency bands between 4 to 6 GHz with much smaller components. This help achieve tighter integration.
What's next?
This technology has been demonstrated on 100mm wafers using standard semiconductor equipment and processing. CEA-Leti has also demonstrated that LiNbO3 materials can be processed in a CMOS cleanroom facility without cross contaminating other wafers. CEA-Leti team is currently working on 200mm wafers to increase manufacturability and lower production costs. The goal is to enable mass production by 2024.