| abstract |
A micro fluid device provided with a fine flow path structure capable of easily and positively providing therein micro fluid having various dilution ratios. A fine flow path structure provided in a substrate (2) has a first mixing unit (11) and a second mixing unit (21) connected to the downstream side of the first mixing unit (11), with each mixing unit (11, 21) having first through third fine flow paths. One end of a first weighing unit (11d) consisting of a fine flow path having a capacity equivalent to the volume of a specified-amount first micro fluid is opened to a first fine flow path (11a), and the other end is opened to a merging unit (12a) provided on a second fine flow path (12). One end of a second weighing unit (13d) consisting of a fine flow path having a capacity equivalent to the volume of a specified- mount second micro fluid is connected to a third fine flow path (13), and the other end is opened to the merging unit (12a). Any one of the first through third outlet ports of the first mixing unit is connected with the first or the third inlet port of the second mixing unit (21). |