Patent ID: 11955548
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A ferroelectric field-effect transistor (FeFET) device, comprising:
a ferroelectric layer having a first side and a second side opposite to the first side;
a gate electrode disposed along the first side of the ferroelectric layer;
an oxide semiconductor (OS) channel layer disposed along the second side of the ferroelectric layer opposite to the first side, the OS channel layer having a first doping type;
a two-dimensional (2D) contacting layer disposed along the OS channel layer, the 2D contacting layer having a second doping type different than the first doping type; and
a pair of source/drain regions having a bottom surface contacting an upper surface of the 2D contacting layer opposite to the OS channel,
wherein the 2D contacting layer comprises ending portions underlying the pair of source/drain regions and a middle portion disposed therebetween, the middle portion having a first doping concentration smaller than a second doping concentration throughout the ending portions.