Patent ID: 7819138

Claim:
A microfluidic device comprising: a rotatable platform; a plurality of connection ports disposed at a portion of the platform proximate to a shaft connection hole disposed in the platform, the plurality of connection ports capable of being connected to an external connector for selectively injecting and discharging a fluid and being closed by the external connector; a trap chamber disposed at a portion of the platform further away from the shaft connection hole than the plurality of connection ports, the trap chamber including an inlet through which the liquid is directly injected into the trap chamber, an outlet and structures, the inlet connected with at least one connection port of the plurality of connection ports, the outlet connected with another connection port of the plurality of connection ports and the structures enlarging a contact area with the fluid; and a temporary storage disposed at a portion of the platform further away from the shaft connection hole than the trap chamber, the temporary storage including an inlet and an outlet, the inlet connected with the outlet of the trap chamber and the outlet connected with another connection port of the plurality of connection ports, and the temporary storage stores the fluid discharged from the trap chamber by centrifugal force during a rotation of the platform, wherein a channel is directly connected between the connection port of the trap chamber and the inlet of the trap chamber; and wherein all the connection ports of the plurality of connection ports connected to the trap chamber and the temporary storage, are disposed closer to the shaft connection hole of the platform than the trap chamber and the temporary storage are disposed.