FIELD EFFECT TRANSISTOR -TYPE BIOSENSOR WITH CHANGEABLE ELECTRODE PLATE

摘要

PURPOSE: A Field Effect Transistor-type biosensor with exchangeable electrode is provided to detect whether an antigen is existed or not by measuring and monitoring the value of a current flowing between an FET source and a drain. CONSTITUTION: An FET-type biosensor(100) with exchangeable electrode comprises an electrode plate(130) and an electrode plate socket(160). An FET(120) is arranged in a circuit board(110). The circuit board is a semiconductor substrate or a glass substrate. The electrode plate comprises a metal film, and detects a biomaterial. The electrode plate socket is arranged in the circuit board, and attaches and detaches the electrode plate. The electrode plate and the FET are electrically connected.