Patent ID: 9704878
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a substrate including a first region and a second region spaced apart from the first region in one direction; a first stack structure including first insulating layers and first gate electrodes alternately and repeatedly stacked on the substrate; and a channel structure vertically extending in the first stack structure disposed on the substrate of the first region, wherein the first stack structure has a stepwise structure on the substrate of the second region, wherein an end of at least one of the first gate electrodes of the second region includes a first sidewall, wherein an end of each of others of the first gate electrodes of the second region has a second sidewall having a steeper slope than the first sidewall, wherein the at least one of the first gate electrodes includes a first upper gate electrode corresponding to an uppermost one of the first gate electrodes, and wherein the others of the first gate electrodes include first lower gate electrodes under the first upper gate electrode.