Patent ID: 11961910
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A ferroelectric capacitive device comprising:
a plurality of metal layers comprising:
a first metal layer comprising a first metal having a first work function; and
a second metal layer comprising a second metal having a second work function that is different from the first work function, wherein the first metal layer is approximately parallel to the second metal layer;

a vertical contact that contacts the first metal layer;
a vertical electrode that is approximately perpendicular to the first metal layer and approximately perpendicular to the second metal layer; and
a ferroelectric material that surrounds the vertical electrode and directly contacts the vertical electrode and directly contacts the plurality of metal layers to form the ferroelectric capacitive device with a plurality of switching regions in the ferroelectric material comprising:
a first switching region between the vertical electrode and the first metal layer that switches in response to a voltage between the vertical electrode and the vertical contact; and
a second switching region between the vertical electrode and the second metal layer that switches in response to the voltage between the vertical electrode and the vertical contact.