Patent ID: 8367424

Claim:
A microchip including fluid circuits therein, the microchip comprising a first transparent substrate and a second substrate joined to the first transparent substrate, said second substrate having grooves provided at a substrate surface and said fluid circuits being defined by a substrate surface of said first transparent substrate facing said second substrate and said grooves, wherein said fluid circuits comprise: a first liquid reagent receptacle unit to store a first liquid reagent, a first liquid reagent quantification unit connected to said first liquid reagent receptacle unit, wherein the first liquid reagent quantification unit quantifies said first liquid reagent, a first overflow reagent storage unit connected to said first liquid reagent quantification unit, wherein the first overflow reagent storage unit stores said first liquid reagent overflowing from said first liquid reagent quantification unit and has a site irradiated with light to detect absence or presence of said first liquid reagent, a specimen quantification unit that guantifies a specimen, said specimen quantification unit being a distinct unit from said first liquid regent quantification unit, an overflow specimen storage unit connected to said specimen quantification unit, wherein the overflow specimen storage unit stores said specimen overflowing from said specimen quantification unit and has a site irradiated with light to detect absence or presence of said specimen, and a first mixing unit connected to said first liquid reagent quantification unit and said specimen quantification unit, wherein the first mixing unit generates a first mixture by mixing a quantified specimen with a quantified first liquid reagent, said first mixing unit being a distinct unit from said first liquid reagent quantification unit and said specimen quantification unit.