Snaptrack Incorporated

Rf360 Singapore Pte. Ltd.

Stéphane Chamaly

Edgar Schmidhammer

Alexandre Augusto Shirakawa

Maximilian Schiek

Willi Aigner

Christian Huck

Xavier Perois

Thomas Mittermaier

Roland Rosezin

Sok Fong Koh

Xian Yi Li

A BAW resonator (BAWR) with improved power durability and improved heat resistance is provided. The resonator comprises a layer stack with a piezoelectric material (PM) between a bottom electrode (ELI) and a top electrode (EL) and a shunt path parallel (PCPP) to the layer stack provided to enable an RF signal to bypass the layer stack, e.g. to ground (GND). The shunt path (PCPP) has a temperature dependent conductance with a negative temperature coefficient, NTC, of resistance. When the temperature of the device rises due to high power operation, currents that would otherwise permanently damage the device are shunted to ground or another dedicated terminal by the temperature dependent shunt path. Upon cooling down normal operation is resumed.

BAW resonator with improved power durability and heat resistance and RF filter comprising a BAW resonator

An electro-acoustic transducer and an electro-acoustic component including an electro-acoustic transducer are disclosed. In an embodiment the transducer includes a first and a second bus bar, a plurality of electrode fingers and a plurality of two or more sub tracks, wherein each electrode finger is electrically connected to one of the bus bars, wherein each sub track extends along a longitudinal direction, wherein all sub tracks are arranged one next to another in a transversal direction, wherein at least a first of the sub tracks includes segments of the electrode fingers and has an associated sub track with segments of the electrode fingers, wherein the segments of the electrode fingers of the first sub track are shifted by a distance S=&#x3bb;/2 along the longitudinal direction relative to the segments of the electrode fingers of the associated sub track, and wherein &#x3bb; is an acoustic wavelength.

Electro-acoustic transducer and electro-acoustic component comprising an electro-acoustic transducer

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Mouans-Sartoux, France

Stéphane Chamaly