SEMICONDUCTOR DEVICE AND ELECTRONIC SYSTEM INCLUDING THE SAME

A semiconductor device may include a first cell block including a first electrode structure including first electrodes stacked on a substrate, and first channels penetrating the first electrode structure, and a second cell block including a second electrode structure including second electrodes stacked on the substrate, and second channels penetrating the second electrode structure. The first and second electrode structures may extend in a first direction. The first electrode structure may have a first width in a second direction, and the second electrode structure may have a second width greater than the first width. A side surface of the first electrode structure and the first channel adjacent thereto may be apart from each other by a first distance, and a side surface of the second electrode structure and the second channel adjacent thereto may be apart from each other by a second distance different from the first distance.