| 摘要 |
PROBLEM TO BE SOLVED: To provide a microchip which can liquid-send a sample liquid layer flow by converging it to the center of a flow passage, and is easy to be molded.SOLUTION: In a microchip, there are formed a first introduction flow passage 11, second introduction flow passages 21, 22 which are arranged with the first introduction passage sandwiched therebetween, and merged sideway, and a merging flow passage 12 in which fluids sent from theses passages are merged and pass. In the merging flow passage, there is arranged a tapered part 122, in at least a merging part of the first introduction flow passage and the second introduction flow passages, in which a flow passage width in the sandwiching direction of the second introduction flow passages with respect to the first introduction flow passage gradually becomes large as progressing toward a sending direction of the fluids, and a flow passage depth in a vertical direction with respect to a plane including the first introduction flow passage and the second introduction flow passages becomes constant or becomes small as progressing toward the sending direction of the fluids. A contraction part 121 in which the flow passage width and the flow passage depth gradually become small as progressing toward the sending direction is arranged at a downstream side of the tapered part in the sending direction, and the flow passage width and the flow passage depth are constant between a terminal end point of the tapered part and the contraction part. |
