Patent ID: 11903214
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 17:
18. A ferroelectric random access memory device comprising:
a layer stack over a substrate, the layer stack comprising alternating layers of a first dielectric material and a word line (WL) material;
a dielectric layer embedded in the layer stack and extending from an upper surface of the layer stack distal to the substrate to a lower surface of the layer stack facing the substrate;
a ferroelectric film between the dielectric layer and the layer stack, the ferroelectric film disposed on opposing sides of the dielectric layer;
a channel layer between the ferroelectric film and the dielectric layer;
a capping layer between the channel layer and the dielectric layer, wherein the capping layer is a dielectric material having a first dielectric constant higher than a second dielectric constant of the ferroelectric film; and
source lines (SLs) and bit lines (BLs) embedded at least partially in the dielectric layer and extending through the layer stack.