Systems and methods for overcoming stiction
View Patent ↗A number of methods and systems for overcoming stiction are provided. The systems include electromechanical systems capable of exerting a variety of forces upon areas prone to stiction. The systems can be MEMS arrays or other types of devices where stiction related forces occur. The methods include a variety of ways of causing movement in areas prone to stiction forces. Such movement can be vibrational in nature and is sufficient to overcome stiction, allowing a trapped element to be moveed to a desired location.
1. An optical routing apparatus comprising a moveable micromirror, the optical routing apparatus comprising:
a base layer;
a stop disposed over the base layer;
a structural plate supported above the base layer by a pivot, wherein the structural plate is deflectable to contact the stop; and
an actuator disposed near the stop, wherein application of an AC voltage to the actuator causes the stop to oscillate at a frequency at or about the frequency of the AC voltage, and wherein the oscillation is sufficient to overcome stiction related forces between the stop and the structural plate.
2. The system of claim 1 , wherein the oscillation comprises a combination of horizontal and vertical movement relative to the base layer.
3. The system of claim 1 , wherein the actuator is a first actuator, the system further comprising a second actuator, wherein application of a force to the second actuator causes the structural plate to deflect into contact with the stop.