Hybrid organic-inorganic micromirror device and method of making a hybrid microdevice
View Patent ↗A hybrid organic-inorganic micromirror device includes a micromirror comprising an inorganic material positioned above an elastomeric substrate. The micromirror is supported on an underside thereof by a conductive elastomeric support protruding from the elastomeric substrate. The conductive elastomeric support may function as a universal joint and is rendered electrically conductive by an electrically conductive coating thereon. A plurality of electrodes are disposed on the elastomeric substrate under the micromirror. The electrodes are spaced apart from each other and from the micromirror and are arranged around the conductive elastomeric support. Each electrode comprises an inorganic material and is in electrical contact with an elastomeric contact region protruding from the elastomeric substrate. When a voltage bias is applied between the micromirror and one or more of the electrodes, the micromirror is electrostatically actuated to move in a predetermined direction.
1. A hybrid organic-inorganic micromirror device comprising:
a micromirror comprising an inorganic material positioned above an elastomeric substrate, the micromirror being supported on an underside thereof by a conductive elastomeric support protruding from the elastomeric substrate, the conductive elastomeric support functioning as a universal joint and being rendered electrically conductive by an electrically conductive coating thereon;
a plurality of electrodes disposed on the elastomeric substrate under the micromirror, the electrodes being spaced apart from each other and from the micromirror and being arranged around the conductive elastomeric support, each electrode comprising an inorganic material and being in electrical contact with an elastomeric contact region protruding from the elastomeric substrate,
wherein, when a voltage bias is applied between the micromirror and one or more of the electrodes, the micromirror is electrostatically actuated to move in a predetermined direction.
2. The hybrid organic-inorganic micromirror device of claim 1 , wherein the inorganic material is selected from the group consisting of: a doped semiconductor, a metal and an alloy.
3. The hybrid organic-inorganic micromirror device of claim 2 , wherein the inorganic material is doped silicon.
4. The hybrid organic-inorganic micromirror device of claim 2 , wherein the inorganic material comprises a single-crystalline structure.
5. The hybrid organic-inorganic micromirror device of claim 1 , wherein the electrically conductive coating comprises a plurality of conductive particles.
6. The hybrid organic-inorganic micromirror device of claim 5 , wherein the conductive particles are selected from the group consisting of: carbon particles, carbon nanotubes and metal particles.
7. The hybrid organic-inorganic micromirror device of claim 1 comprising four of the electrodes symmetrically positioned about the conductive elastomeric support.
8. The hybrid organic-inorganic micromirror device of claim 1 , wherein the elastomeric substrate, the conductive elastomeric support and the elastomeric contact regions comprise an elastomer selected from the group consisting of: polydimethylsiloxane (PDMS) and polyurethane (PU).
9. The hybrid organic-inorganic micromirror device of claim 1 , wherein the elastomeric substrate, the conductive elastomeric support and the elastomeric contact regions are integrally formed as a monolithic elastomeric body comprising a plurality of conductive surface portions and a substantially non-conductive bulk portion.
10. The hybrid organic-inorganic micromirror device of claim 1 , wherein the micromirror comprises a length or width in the range of from about 10 microns to about 1 mm.
11. The hybrid organic-inorganic micromirror device of claim 1 , wherein the voltage bias is in the range of from about 10 V to about 100 V.