E. Tokumitsu et al., ELECTRICAL-PROPERTIES OF FERROELECTRIC-CAPACITOR-GATE SI MOS-TRANSISTORS USING P(L)ZT FILMS, Integrated ferroelectrics, 15(1-4), 1997, pp. 137-144
A ferroelectric-capacitor-gate Si MOSFET which consists of an SiO2/Si
MOSFET and a ferroelectric capacitor has been demonstrated. It is show
n that memory functions can be obtained by connecting the ferroelectri
c capacitor with the gate of MOSFETs. The operation of such devices is
similar to that of metal-ferroelectric-semiconductor (MFS) FETs. The
large memory window or threshold voltage shift can be obtained with a
ferroelectric capacitor which has a large coercive voltage. The memory
effect of the device has been demonstrated by showing the drain curre
nt change by a previously applied ''write'' pulse at a fixed gate volt
age of 0V.