| abstract |
(57) [Summary] [Problem] To provide a biosensor that can rapidly introduce a sample liquid into an introduction space and is easy to produce. SOLUTION: A working electrode 17 and a correction electrode 18 are formed on a lower surface of an upper glass substrate 12 so as to be parallel to each other, and a counter electrode 16 is formed on an upper surface of a lower glass substrate 13. 2 and 13 are joined together via a spacer 14, and a working electrode 1 is formed in a hollow portion 15 formed by a T-shaped notch formed in the spacer 14 and the upper and lower glass substrates 12 and 13. 7, the correction electrode 18, and the counter electrode 16 are formed so as to be exposed, and the working electrode 17, the correction electrode 18, and the counter electrode 16 are arranged so as not to overlap in a plane. . With such a structure, the sample liquid introduced from the sample liquid inlet 15A can be easily measured by the capillary phenomenon without being affected by the water repellency of the counter electrode. 5B becomes easy to enter, and quick concentration measurement becomes possible. |