Patent ID: 9748174
Date: 2017-08-29
CPC Classifications: H01L

Claim:
1. A three-dimensional memory device comprising: an alternating stack of insulating layers and electrically conductive layers located over a substrate; and memory stack structures extending through the alternating stack, wherein each of the memory stack structures comprises a memory film and a vertical semiconductor channel, wherein each of the electrically conductive layers comprises: a liner stack of a first metallic nitride liner, a tungsten liner contacting the first metallic nitride liner, and a second metallic nitride liner contacting the tungsten liner; and a metal fill portion surrounded on three sides by the second metallic nitride liner, wherein: the liner stack comprises a fluorine diffusion barrier; the metal fill portion comprises a tungsten fill portion; the first and the second metallic nitride liners comprise titanium nitride liners; and the metal fill portion is spaced from the tungsten liner by the second metallic nitride liner.