An electrostatic actuator having a base including a first electrode and a flexible membrane including at least two material layers of different materials in contact with each other. At least one of the material layers includes a second electrode electrically isolated from the first electrode. The flexible membrane includes a fixed end connected to the base and a free end opposite the fixed end and spaced apart from the base. The second electrode has at least first and second portions separated by a third portion and in combination defining a first and second step provided in a vicinity of the fixed end.
Flexible electrostatic actuator
Dausch, D., & Goodwin, S. (2012). Flexible electrostatic actuator. (U.S. Patent No. 8198974). http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=8198974