Patent ID: 7951332

Claim:
A centrifugal force based microfluidic device for dilution, comprising: a rotatable disk type platform; a mixing chamber disposed on the platform; a buffer solution storage disposed on a portion of the platform which is closer to a center of the platform than the mixing chamber, connected to the mixing chamber through a channel to supply a predetermined amount of buffer solution to the mixing chamber at least one time; and a plurality of diluted solution chambers which are disposed on a portion of the platform which is farther from the center of the platform than the mixing chamber, are each connected to the mixing chamber through flow paths extended from a middle exit corresponding to a predetermined water level, and sequentially receiving a solution which is serially diluted in the mixing chamber at least one time, wherein the middle exit is formed in a side portion of the mixing chamber, and a second exit is formed in the mixing chamber at a position closer to an outer circumference of the platform than the middle exit.