| 摘要 |
<p>It is an object of the present invention to provide a piezoelectric sensor sensing a substance to be measured in a sample solution, thereby conducting high-precision measurement. As a concrete solving means, a piezoelectric sensor is structured such that it includes a pressing member in which a solution storage space having a bottom surface being one surface of a piezoelectric resonator provided to cover a recessed portion of a wiring board is formed, which includes an annular projection provided to surround the solution storage space and pressing a portion, of the one surface of the piezoelectric resonator, outside the recessed portion toward the wiring board to fix a position of the piezoelectric resonator, and which is made of an elastic material, and the annular projection is structured such that both side surfaces thereof get smaller in diameter toward a lower side and a distance between the both side surfaces gets smaller toward the lower side. The side surface of the solution storage space makes an obtuse angle to its bottom surface and in a corner portion made by these surfaces, an upper side of the bubbles are opened, and therefore, bubbles, even if entering the solution storage space, can float up and thus are prevented from staying in the space, which results in higher-precision measurement.</p> |
