Patent ID: 11968826
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A three-dimensional memory device, comprising:
an alternating stack of insulating layers and electrically conductive layers;
memory openings extending through the alternating stack; and
memory opening fill structures located in the memory openings and comprising a respective vertical semiconductor channel and a respective memory film,
wherein each of the electrically conductive layers comprises:
a tubular metallic liner in contact with a respective outer sidewall segment of a respective one of the memory opening fill structures;
an electrically conductive barrier layer contacting the respective tubular metallic liner and two of the insulating layers; and
a metallic fill material layer contacting the electrically conductive barrier layer, and not contacting the tubular metallic liner or any of the insulating layers;

wherein the tubular metallic liner comprises tungsten doped with boron, and the metallic fill material layer comprises tungsten that contains no boron or has a lower concentration of boron than the tubular metallic liner; and
wherein an average atomic percentage of boron within the tubular metallic liner is in a range from 0.1% to 5.0%.