The SEM micrograph in Fig. 14 shows one of these sensors
(110 m 110 m). Both designs have a linear response one of which (from the 110 m sensor) is shown in Fig. 15 for a
300-Å-thick device. As one dimension scales by a factor of a in
these sensors, the area and hence the capacitance reduces by a
factor of . Accordingly, the sensitivity (about 25 fF/%RH) of
these devices is much smaller than those presented before.