The reaction field which becomes the sensor tip/chip, and the field of interaction between uses the interaction sensing station and

摘要

PPROBLEM TO BE SOLVED: To efficiently and effectively apply an electric field to a reaction region by a simple configuration and to especially concentrate the electric field to the specific region of the electrode fronted to the reaction region. PSOLUTION: In the detection part having the reaction region R becoming the field of the interaction between substances, electrode layers 12 and 13 used when the electric field E is applied to the reaction field R and the insulating layers 14 for covering the surfaces of electrodes. Specific insulating parts 141 high in dielectric constant are provided to the insulating layers 14 to concentrate the electric field to the specific insulating parts 141. For example, the specific insulating parts 141 are set to a region formed of a material of which the dielectric constant is higher than that of a peripheral insulating layer 142. PCOPYRIGHT: (C)2007,JPO&INPIT