SEMICONDUCTOR DEVICE AND METHOD OF MANUFATURING THE SAME

摘要

The semiconductor device includes a reference voltage generator circuit and a circuit different from the reference voltage generator circuit. A semiconductor element of the reference voltage generator circuit has a channel region where a substrate impurity concentration is substantially uniform at least in the vicinity of a drain region. A semiconductor element of the circuit different from the reference voltage generator circuit has a channel region where a substrate impurity concentration is higher than in other part of the region at least in the drain region.