Patent ID: 11929323
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 17:
18. A method of forming a microelectronic device, comprising:
forming a first microelectronic device structure comprising:
a preliminary structure overlying a base structure and comprising conductively doped epitaxial silicon;
a stack structure overlying the preliminary structure and comprising conductive structures and insulative structures vertically alternating with the conductive structures;
pillar structures comprising semiconductive material vertically extending through the stack structure and the preliminary structure and into the base structure;
conductive contact structures horizontally offset from the pillar structures and vertically extending through the stack structure and into the preliminary structure; and
digit line structures vertically overlying the stack structure and in electrical communication with the pillar structures;

attaching the first microelectronic device structure to a second microelectronic device structure comprising control logic circuitry through a combination of oxide-oxide bonding and metal-metal bonding to form an assembly, the digit line structures of the assembly in electrical communication with the control logic circuitry of the assembly;
after forming the assembly, removing the base structure and portions of the pillar structures to expose the preliminary structure and remaining portions of the pillar structures; and
after removing the base structure and the portions of the pillar structures, patterning the preliminary structure to form at least one source structure coupled to the pillar structures and contact pads electrically isolated from the at least one source structure and coupled to the conductive contact structures.