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Lateral/vertical transistor structures and process of making and using same

  • US 10,350,594 B2
  • Filed: 03/05/2018
  • Issued: 07/16/2019
  • Est. Priority Date: 12/08/2014
  • Status: Active Grant
First Claim
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1. A method of moving a micro-object in a fluidic medium within a microfluidic device, the microfluidic device comprising an enclosure having a microfluidic structure and a base, wherein the base comprises a common electrical conductor and the microfluidic structure comprises a cover with a biasing electrode, wherein the microfluidic structure and an outer surface of the base together define a flow path disposed between the biasing electrode of the cover and the common electrical conductor of the base within the enclosure, wherein the base comprises an array of transistor structures, each said transistor structure in the array comprising a lateral bipolar transistor connecting a corresponding region of the outer surface of the base to the common conductor and a vertical bipolar transistor connecting the corresponding region of the outer surface of the base to the common conductor, and wherein the corresponding regions of the outer surface of the base are disposed to contact directly fluidic medium in the flow path,the method comprising:

  • providing biasing power to the biasing electrode and the common electrical conductor of the base; and

    activating a first of the transistor structures at a first of the corresponding regions of the outer surface of the base,wherein said activating induces a first current flow in at least a lateral bipolar transistor of the first transistor structure and creates an eletrokinetic force in the vicinity of the activated first transistor structure sufficient to move a nearby micro-object in the flow path.

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