Patent ID: 11881505
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A semiconductor structure, comprising:
a plurality of fins on a semiconductor substrate, the plurality of fins including an alternating sequence of a first nanosheet made of epitaxially grown silicon and a second nanosheet made of epitaxially grown silicon germanium; and
a shallow trench isolation region within the semiconductor substrate adjacent to the plurality of fins, the shallow trench isolation region including a shallow trench isolation tri-layer liner within a recess in the semiconductor substrate, the shallow trench isolation tri-layer liner being formed by a first liner, a second liner directly above the first liner, a third liner directly above the second liner, and a dielectric material directly above the third liner,
wherein the first liner is made of a first oxide material, the third liner is made of a nitride material, and the second liner is made of a second oxide material that creates a dipole effect for neutralizing positive charges within the third liner and positive charges between the third liner and the first liner.