Patent ID: 11950429
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A system for forming a ferroelectric device, the system comprising:
a process chamber including a pedestal or chuck configured to structurally support one or more devices or layers in the process chamber;
a plurality of composition sources and a plurality of control devices, each composition source coupled to the process chamber via a separate control device, each control device configured to control a supply of a separate material held in a separate coupled composition source to the process chamber; and
an electronic device configured to control at least the plurality of control devices to fabricate a ferroelectric capacitor based on
forming a first electrode on the pedestal or chuck,
forming a first interfacial layer on the first electrode, the first interfacial layer is HfO2 and has a thickness in a range of more than 40 Å up to 200 Å,
forming a ferroelectric layer on the first interfacial layer such that the first interfacial layer directly contacts both the first electrode and the ferroelectric layer, the ferroelectric layer including a hafnium-based oxide,
forming a second interfacial layer on the ferroelectric layer, the second interfacial layer is HfO2 and has a thickness in a range of more than 40 Å up to 200 Å, and
forming a second electrode on the second interfacial layer such that the second interfacial layer directly contacts both the second electrode and the ferroelectric layer,

wherein the ferroelectric capacitor further includes oxygen vacancies at
interfaces of the first interfacial layer and at least one of the first electrode or the ferroelectric layer which directly contact the first interfacial layer, and
interfaces of the second interfacial layer and at least one of the second electrode or the ferroelectric layer which directly contact the second interfacial layer,

wherein the first interfacial layer, the second interfacial layer, and the ferroelectric layer are separate layers, and the ferroelectric layer includes a different material composition than the first and second interfacial layers.