Magnetically actuated microelectromechanical systems actuator

Details Magnetically actuated microelectromechanical systems actuator Magnetically actuated microelectromechanical systems actuator

2007-05-22

2007-05-22

Lester, Evelyn A. (Department: 2873)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

C335S219000, C359S223100, C359S280000, C359S290000, C359S298000

Reexamination Certificate

active

11271031

ABSTRACT:
A microelectrical mechanical system (MEMS) actuator having electrically conductive coils that create first magnetic fields that are opposed by a second magnetic field is disclosed. The actuator includes two coils having dual, interspersed Archimedean spirals. Within an actuator, one coil is arranged with spirals that proceed clockwise, while the other coil is provided with spirals that proceed counterclockwise. An electrically conductive bridge mechanically couples the two coils of each actuator to a mirror. Opposing magnetic fields are created to provide a force that urges the coils to expand so that the outermost portions of the coil extend upward, away from the substrate, and lift the bridge and mirror. Control current may then be modulated to increase and decrease the coil's magnetic field strength thereby increasing and decreasing the coil's extension to raise and lower relative to the substrate.

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