Patent ID: 9343476
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a stack structure on a substrate, the stack structure including conductive lines and insulating layers that are alternately stacked; an active pillar that penetrates the stack structure; and a crystallization inducing metal doped in the active pillar, wherein a doping concentration of the crystallization inducing metal in the active pillar varies depending on a height from a bottom surface of the active pillar, wherein a sidewall of the active pillar is substantially non-linear, wherein the active pillar comprises: an active plug adjacent the substrate; and an active shell having a hollow cup-shape on the active plug, and wherein the doping concentration of the crystallization inducing metal at a bottom surface of the active shell is higher than the doping concentration of the crystallization inducing metal at a sidewall of the active shell.