Patent ID: 11929436
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A semiconductor device comprising a thin film transistor located over a substrate, wherein the thin film transistor comprises:
an insulating matrix layer including an opening therein and overlying a substrate;
a hydrogen-blocking dielectric barrier layer continuously extending over a horizontal plane including a bottom surface of the insulating matrix layer, over sidewalls of the opening, and over a top surface of the insulating matrix layer;
a bottom gate electrode located within the opening on the hydrogen-blocking dielectric barrier layer, wherein the hydrogen-blocking dielectric barrier layer comprises a first horizontally-extending portion that underlies the bottom gate electrode;
a stack of a bottom gate dielectric and a semiconducting metal oxide plate overlying a top surface of the bottom gate electrode and horizontally-extending portions of the hydrogen-blocking dielectric barrier layer that overlie the insulating matrix layer;
a stack of a top gate dielectric and a top gate electrode overlying the bottom gate electrode and having an areal overlap with the bottom gate electrode in a plan view; and
a source electrode and a drain electrode contacting a respective portion of a top surface of the semiconducting metal oxide plate.