Patent ID: 7834358
Filing Date: 2010-11-16
Classification: H01L

Abstract:
1. A semiconductor LSI circuit, comprising: a first semiconductor region; a first gate insulating layer on one side of the first semiconductor region; a first gate electrode of a first conductivity type on the first gate insulating layer; a first source region and a common drain region sandwiching the first semiconductor region; a second gate insulating layer on the other side of the first semiconductor region; a second gate electrode of the first conductivity type on the second gate insulating layer; a second semiconductor region adjacent to the common drain region; a third gate insulating layer on one side of the second semiconductor region; a third gate electrode of a second conductivity type opposite to the first conductivity type on the third gate insulating layer; a second source region adjacent to the second semiconductor region and the common drain region; a fourth gate insulating layer on the other side of the second semiconductor region; and a fourth gate electrode of the first conductivity type on the fourth gate insulating layer; wherein the first semiconductor region, the first gate insulating layer, the first gate electrode, the first source region, and the common drain region constitute a first transistor; the first semiconductor region, the second gate insulating layer, the second gate electrode, the first source region, and the common drain region constitute a second transistor; the second semiconductor region, the third gate insulating layer, the third gate electrode, the second source region, and the common drain region constitute a third transistor; and the second semiconductor region, the fourth gate insulating layer, the fourth gate electrode, the second source region, and the common drain region constitute a fourth transistor, and wherein an electron affinity of the third gate electrode is smaller than that of the fourth gate electrode, and the first through the fourth transistors constitute a NOR gate.