Patent ID: 11948992
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of forming an electronic device, the method comprising:
forming a source contact sacrificial structure disposed on a source stack comprising a doped semiconductor material disposed on a source material, the source material disposed on one or more conductive materials of the source stack;
forming a doped dielectric material disposed on the source contact sacrificial structure and the source stack;
forming tiers disposed on the doped dielectric material, the tiers comprising alternating conductive materials and dielectric materials;
forming pillar openings extending through the tiers, the doped dielectric material, and into the source stack;
forming pillars comprising cell films in the pillar openings, the cell films comprising a channel;
forming a slit through the tiers to expose the source contact sacrificial structure;
selectively removing a first material of the source contact sacrificial structure to form a source contact opening;
removing a portion of a charge blocking material of the cell films to increase a size of the source contact opening;
removing a portion of a charge trap material of the cell films and a portion of the doped dielectric material to increase the size of the source contact opening;
removing a portion of a tunnel dielectric material of the cell films to further increase the size of the source contact opening and to expose the channel; and
forming a conductive material in the source contact opening to form a source contact extending laterally and directly contacting the channel, the source contact disposed on the source stack, the pillars extending through the source contact and the doped dielectric material disposed on the source contact.