SEMICONDUCTOR DEVICES

A semiconductor device includes: a first structure including: a first semiconductor pattern protruding from a substrate, the first semiconductor pattern being a channel; a first conductive pattern surrounding the first semiconductor pattern, the first conductive pattern being a gate electrode; a first impurity region located below the first semiconductor pattern, the first impurity region being in contact with the first semiconductor pattern, and the first impurity region being a source region or a drain region; and a second impurity region contacting the first semiconductor pattern, the second impurity region being the other one of the source region or the drain region; and a second structure including: second semiconductor patterns spaced apart from each other, each of the second semiconductor patterns protruding from the substrate; second conductive patterns surrounding the second semiconductor patterns, respectively; and first contact plugs connected to the second conductive patterns, where the first stru