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Fluid sensor preventing generation of air bubbles

  • US 8,968,674 B2
  • Filed: 03/01/2011
  • Issued: 03/03/2015
  • Est. Priority Date: 07/13/2010
  • Status: Active Grant
First Claim
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1. A fluid sensor comprising:

  • a main body comprising;

    an underlying substrate and a top plate disposed thereon,a reaction unit including an inner space of the main body,an inlet disposed in a first side of the top plate and fluidly connected to the reaction unit; and

    an outlet disposed in a second side of the top plate and fluidly connected to the reaction unit, the lower side of the outlet being disposed on the top plate,wherein the reaction unit has a side profile from a vertical cross-section in a direction from the inlet to the outlet that includes a slope at a positive angle (α

    ) to the underlying substrate that is less than a contact angle of the substrate, which tapers the inner space of the reaction unit towards the inlet, andthe vertical cross-section of the reaction unit in a direction perpendicular to the direction from the inlet to the outlet, and a horizontal cross-section of the reaction unit, have a shape that is inwardly tapered on both sides, with an inwardly tapered angle (β

    ) that is less than a contact angle of the substrate.

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