Patent ID: 8648393
Filing Date: 2014-02-11
Classification: H01L

Abstract:
1. An accumulation-mode transistor comprising a channel region and a source region and a drain region formed at both ends of said channel region, wherein said channel region has an impurity concentration higher than 2×10 17 cm −3 and said channel region is formed of an n-type semiconductor with electrons used as carriers or is formed of a p-type semiconductor with holes used as carriers, wherein an electric field applied to a gate insulating film when a gate voltage corresponding to a threshold value is applied is 0 MV/cm or less and directions of effective electric fields applied to the gate insulating film and the channel are opposite to each other, respectively, in the on and off states of the transistor, and wherein said source region and said drain region are formed of a metal or a metal-semiconductor compound having a work function with a difference of 0.32 eV or less with respect to a work function of the semiconductor of said channel region.