Patent ID: 7582261

Claim:
A sample detection device, comprising a substrate, receiving a light beam, which is formed substantially in a disk shape, said substrate including a center and one or more flow paths, each disposed in a radial direction from the center, and each of which allows sample liquid to be injected therein, wherein the substrate further includes a first electrode, a second electrode, a first electrode connection point and a second electrode connection point, wherein the first electrode connection point and the second electrode connection point are provided in a vicinity of the center substantially in a concentric circular manner so that the first electrode connection point and the second electrode connection point do not electrically contact each other, wherein the first electrode includes a wiring pattern provided on a vicinity of the peripheral portion of the substrate and having a circular shape; a radial wiring pattern extended in a radial direction of the substrate and electrically connecting said wiring pattern and a termination of each of the flow paths; and a first electrode wiring for electrically connecting the first electrode and the first electrode connection point, wherein the second electrode includes a second electrode wiring for electrically connecting the second electrode and the second electrode connection point, said second electrode wiring being electrically connected to a beginning point of the flow path, wherein the first electrode connection point is provided at a position outside of the second electrode connection section in a radial direction, said first electrode connection point is divided into parts by electrode gaps so as not to electrically contact the second electrode wiring, said electrode gaps being disposed radially, and wherein the first electrode does not have electrical contact with the second electrode and the second electrode connection point.