Automated on-wafer characterization in micro-machined resonators: towards an integrated test vehicle for bulk acoustic wave resonators (FBAR)

Electrical on-wafer characterization in FBAR is automated by means of a wide-band parameter extraction algorithm, in order to define a complete characterization vehicle for FBAR and MEMS resonators. A model of FBAR-substrate losses is proposed and an automation algorithm implementing a multi-step least-squares strategy is presented. Extraction of the equivalent-circuit parameters is performed from experimental s-parameter data acquired by a microwave network analyzer. The results of FBAR and substrate characterization are presented, and the basis of an integrated test vehicle is discussed.