Figure 2
From: Functionalization of an extended-gate field-effect transistor (EGFET) for bacteria detection

Hybrid setup of the developed EGFET. (a) Lithography mask with one sensor area displayed in larger scale underneath. For a better visualization, the area of the control-gate electrode (CG) is filled whereas the floating-gate electrode (FG) is only displayed with a framed line. All closed areas on the lithography mask are filled by a chromium layer. (b) Realization of the sensor thin-film substrate. The polycarbonate plate has open holes for the liquid and is stick to the glass substrate. (c) PCB for connection purposes between the sensor substrate, the transducer, and the SMUs. (d) Connection between a sensor area and the MOSFET by wire jumpers. (e) Integration of the SMUs into the measurement setup for recording the transfer characteristics.