Abstract: In a semiconductor IC, a diode and a resistor for surge protection are integratedly formed in a p-type common island region laterally isolated from a p-type epitaxial layer by oxide film, by forming an n-type region of high impurity concentration to reach down to an n-type buried region and a resistor region, respectively; the IC has higher integration and larger junction area of the diode, and achieve better surge protection.

Abstract: A moisture content meter comprisingA microwave generator for generating a microwave signal of a constant power level,A microstrip transmission line connected in a manner to receive at one end thereof the microwave signal from said microwave generator and disposed in a manner that a flowing sample object, for instance cereal, contacts substantially the surface thereof andA microwave detector connected in a manner to detect the remaining power level after absorption by the flowing sample object of the microwave signal taken from the other end of said microstrip transmission line.