A micro-electromechanical system (MEMS) device includes a movable comb structure located in a cavity within an enclosure, and a stationary structure affixed to the enclosure. The movable comb structure includes a comb shaft portion and movable comb fingers laterally protruding from the comb shaft portion. The movable comb structure includes a metallic material portion. The movable structure and the stationary structure are configured to generate an electrical output signal based on lateral movement of the movable structure relative to the stationary structure.