Patent ID: 11949022
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An electronic system having integrated circuitry comprising:
a conductive source line having a vertical thickness and consisting of heavily doped tungsten silicide throughout the vertical thickness;
a monolithic pillar of semiconductive material having a constant diameter throughout a height of the pillar with a lower surface physically contacting the conductive source line, the pillar of semiconductive material having opposing vertical sidewalls extending partially through the conductive source line and having a first portion that functions as a source and a second portion that functions as a drain, the monolithic pillar having a uniform composition and an absence of interfaces, seams and large defects throughout the height of the pillar;
gate dielectric material along the opposing vertical sidewalls;
a field effect transistor comprising a channel within the semiconductive pillar and having a control gate separated from the source line by an insulating material; and
two or more memory cells stacked on the field effect transistor, the two or more memory cells comprising channels formed in the monolithic pillar of semiconductive material, the monolithic pillar extending upward from the source line through the two or more memory cells.