Patent ID: 11925030
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming a memory device, the method comprising:
depositing a memory film over a substrate, wherein the memory film comprises a pair of source/drain layers and a source/drain dielectric layer between the source/drain layers;
performing a first etch into the memory film to form a trench through the memory film;
recessing a sidewall of the source/drain dielectric layer relative to sidewalls of the source/drain layers through the trench to form a recess;
depositing a semiconductor layer lining the recess and the trench;
depositing a first electrode layer filling the recess and the trench over the semiconductor layer;
performing a second etch into the semiconductor layer and the first electrode layer to clear the semiconductor layer and the first electrode layer from the trench;
depositing a ferroelectric layer lining the trench and further lining the first electrode layer and the semiconductor layer at the recess; and
depositing a second electrode layer filling the trench over the ferroelectric layer.