MIS transistors having thin gate insulating films are used in circuits such as a logic circuit other than the above semiconductor device. [0365] As shown in FIG. 43, ITR transistors PTR1, PTR2, NTR1 and NTR2 are utilized in the latch circuit, and the ITR transistors are used between power supply node 1 and ground node 2 so that the gate tunnel current can be suppressed even in such a case that the