An electrostatic comb drive suitable for micro-electro-mechanical systems ("MEMS") application uses shaped fingers to achieve bi-directional actuation from a unipolar actuation pulse. The finger shape also provides auto-braking of the movable member of the drive using a simple actuating pulse. In a further...http://www.google.com.au/patents/US6771001?utm_source=gb-gplus-sharePatent US6771001 - Bi-stable electrostatic comb drive with automatic braking
