Patent ID: 7054004

Claim:
A capillary array comprising a substrate having a planar capillary holding surface and a plurality of capillaries aligned on the capillary holding surface of the substrate, wherein a laser beam irradiated on a capillary at one end or capillaries at both ends of the plurality of capillaries in a substantially parallel direction with respect to the capillary holding surface propagates to all the plurality of capillaries one by one to travel through the capillaries, and emissions from each of the capillaries are detected in a substantially perpendicular direction with respect to the capillary holding surface, wherein the substrate is provided with a through hole extending from the capillary holding surface to a back side of the substrate in an area opposing to portions of the plurality of capillaries each of which receives the laser beam irradiation, and wherein the substrate aligning the capillaries exists at the back of the capillaries when the capillary array is viewed from a fluorescence detector.