| 摘要 |
A biosensor is provided to detect a material in a biological sample electrochemically, minimize the blood amount to be required while increasing the absorption speed of sample fluid by increasing air release speed via an air release space, and inhibit leakage of sample(blood diffusion phenomenon) through the air release space. A biosensor for detecting a material in a biological sample electrochemically comprises: an insulating lower substrate(100) containing at least one electrode(111, 112, 113), and an enzyme reaction layer(120) for reacting with the material in the sample on the surface; a spacer(600) for attaching the lower substrate to the upper substrate, and forming a sample introduction space(610) for inducing absorption of the sample to the position of electrode along the enzyme reaction layer; and an insulating upper layer(700) having an air release space(710) for releasing the air absorbed together with the sample through the sample introduction space, wherein the air release space has a three-dimensional shape formed in a different layer from the sample introduction space. Further, a section of the air release space has 0.3 to 3 mm of width and 0.1 to 3 mm of height.
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