Double Beam Laser Interferometer | aixACCT

The Double Beam Laser Interferometer (aixDBLI) for the measurement of d33 offers a proven accuracy (x-cut quartz) up to 0.2 pm/V. The main feature of the system is the ultra fast acquisition time of a few seconds for a single measurement.

​Based on a new data acquisition algorithm, the measurement speed is enhanced by a factor of 100. This enables for the first time the comparison of electrical and mechanical data for thin films recorded at the same excitation frequency. Due to the the differential measurement principle the influence of sample bending is eliminated, which is the major obstacle using atomic force microscopes (AFM) for these types of measurements.

The unique properties of the aixDBLI system make it suitable for piezoelectric and electrical reliability testing of MEMS (micro electro mechanical systems) devices on 6″ wafers. The excellent resolution of this system with an repeatability accuracy better than 2 % distinguish this system for mass production qualification. The whole set-up consists of optical components in a vibration damped chamber, the TF Analyzer 2000 and some additional analog circuitry.