MICROCHIP AND LIQUID SENDING METHOD FOR MICROCHIP

摘要

A microchip capable of sending liquid in a micro flow channel to a predetermined place irrespective of the pressure difference and sending a mixture of two or more liquid masses to a predetermined place even if the channel structure is simple. The microchip comprises an intermediate reservoir portion (139) provided in a micro flow channel (r) and adapted for temporarily holding liquid sent through the micro flow channel. The microchip is characterized in that the intermediate reservoir portion (139) has a side channel (139s), the volume (Vs) of the intermediate reservoir portion (139) is smaller than the total volume of the liquid sent into the intermediate reservoir portion (139), the side channel (139s) is provided for communication of a micro flow channel (r1) on the upstream side of the intermediate reservoir portion (139) with a micro flow channel (r2) on the downstream side thereof, and the cross-section area of the side channel (139s) is smaller than that of the micro flow channel (r).