Reduced voltage MEMS electrostatic actuation methods
Cantilever beam electrostatic actuators are disclosed. A cantilever beam electrostatic actuator in accordance with the present invention comprises an actuator beam having a first width at a support anchor point and a second width at a distal end of the actuator, wherein the first width is narrower than the second width. Another actuator in accordance with the present invention comprises an actuator region, having a first width, a beam, having a second width, coupled between an edge of the actuator region and a pivot point, the beam being approximately centered on the actuator region, wherein the second width is narrower than the first width, and at least one auxiliary actuator flap, coupled to the actuator region, the at least one auxiliary actuator flap coupled to the actuator region along the edge of the actuator region, the at least one auxiliary actuator flap being farther away from a centerline of the actuator than the beam.
1. A cantilever beam electrostatic actuator, comprising:
an actuator region having a first width;
a first actuator support beam coupled to the actuator region, the first actuator support beam having a second width at a first support anchor point;
a second actuator support beam coupled to the actuator region, the second actuator support beam having a third width at a second support anchor point; and
at least one auxiliary actuator flap coupled to the actuator region along an edge of the actuator region;
wherein both of the second width and the third width are narrower than the first width; and
wherein the first actuator support beam and the second actuator support beam are symmetric about a center line of the cantilever beam electrostatic actuator.
2. The cantilever beam electrostatic actuator of claim 1 , further comprising a standoff feature.
3. The cantilever beam electrostatic actuator of claim 2 , wherein the standoff feature controls a displacement of the first actuator support beam.
4. The cantilever beam electrostatic actuator of claim 2 , wherein the standoff feature controls first actuator support beam motion upon actuation.
5. The cantilever beam electrostatic actuator of claim 2 , wherein the standoff feature controls first actuator support beam motion upon deactivation.
6. The cantilever beam electrostatic actuator of claim 5 , wherein the at least one auxiliary actuator flap is coupled to the cantilever beam electrostatic actuator opposite the distal end of the cantilever beam electrostatic actuator.
7. The cantilever beam electrostatic actuator of claim 6 , wherein the at least one auxiliary actuator flap is coupled to the cantilever beam electrostatic actuator between the first actuator support beam and the second actuator support beam.
8. The cantilever beam electrostatic actuator of claim 7 , further comprising a standoff feature.
9. The cantilever beam electrostatic actuator of claim 8 , wherein the standoff feature controls a displacement of the first actuator support beam.
10. The cantilever beam electrostatic actuator of claim 8 , wherein the standoff feature controls first actuator support beam motion upon actuation.
11. The cantilever beam electrostatic actuator of claim 8 , wherein the standoff feature controls first actuator support beam motion upon deactivation.
12. An actuator, comprising
an actuator region, having a first width;
a beam, having a second width, coupled between an edge of the actuator region and a pivot point, the beam being approximately centered on the actuator region, wherein the second width is narrower than the first width, and
at least one auxiliary actuator flap, coupled to the actuator region, the at least one auxiliary actuator flap coupled to the actuator region along the edge of the actuator region, the at least one auxiliary actuator flap being farther away from a centerline of the actuator than the beam.
13. The actuator of claim 12 , further comprising a standoff feature.
14. The actuator of claim 12 , wherein the standoff feature controls a displacement of the beam.
15. The actuator of claim 12 , wherein the standoff feature controls beam motion upon actuation.
16. The actuator of claim 12 , wherein the standoff feature controls beam motion upon deactivation.