MEMS testing has always been challenging. Now, with many emerging and new types of materials, device testing and characterization is becoming even more important. However, even at the R&D level, most MEMS testing techniques still only rely on electrical, rather than mechanical, measurements. We recently spoke with Dr. Felix Beyeler, the founder and CEO of FemtoTools, about his company and the developing field of MEMS mechanical testing. In this detailed interview, Felix provides his insights on the latest mechanical testing techniques, emerging applications, and his perspective on the MEMS R&D tool market.