MicroTweezers Movies

MEMS Precison Instruments



Here are some movies to demonstrate the Tweezers' perfomance and its characteristics. In order to view the movies, you have two options: RealVideo and MPEG. Click on the image to view the RealPlayer video. You need to have RealPlayer Video installed on your desk. If you don't have the application, you can download RealPlayer Basic (free of charge) directly from the RealPlayer site

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Compatible with Robotic systems:
MicroTweezers could a part of robotic system for pick and place assembly of micro objects. Here are some movies showing a Sandia Micro-engine moving to rotate gears in a 20,000 to 1 reduction transmission to move the MEMSPI tweezer mechanism past the edge of the die to grip an object. In the final movie the MicroTweezers picks up a 5 micron diameter glass fiber.(fabrication of MEMSPI tweezer design done at Sandia in their summit 4 process)
 
Engine Gear Tip Action Glass Fiber
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Hexsil MicroTweezers:
Hexsil is high aspect ratio molded polysilicon. It allows the integrated fabrication of structures having molded beams that are: undoped (highly resistive), doped (conductive), electroless nickel (highly conductive), and surface poly.
 
Hexsil Tweezers Tip Performance Publications
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Tip & Ruler:
The Tip opening distance is proportional to the applied power and the design of the tweezer. The MicroRuler is the measurement tool to show the Tip opening displacement. It provides the meaningful information for your products and processing implementations.
Tip open Size Tip & Ruler full view
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MicroTweezers under Water:
This special MicroTweezer design has the actuator mounted in the handle so that the gripper can operate under Water

MicroTweezers pick up Wire under pond water:
MicroTweezers grip a 10 micron diameter stainless steel wire in pond water (some out of focus protozoa swim by). In this side view one gripper tip is hidden from view behind the other one. Tweezers grasp the Wire and move it back and forth in the water, then release the Wire.

MicroTweezers pick up a Ball under pure water
This MicroTweezer grips a 10.9 micron diameter biotinylated polystyrene sphere that is on a silicon surface under water. If there were a strepavidin coated surface available, the gripped sphere could be precisely transfered to it. Of course with nothing else to be touched to provide adhesion forces, the sphere will simply stick to one of the tweezer tips when they are opened (still under water)

Tweezers pick up Wire in the pound-water Tweezers pick up Bead in the pure-water
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