Patent ID: 11923253
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A device, comprising:
a first transistor formed on a first region of a semiconductor fin;
a second transistor formed on a second region of the semiconductor fin; and
a dielectric structure isolating the first transistor from the second transistor, wherein the dielectric structure is spaced apart from source/drain regions of the first transistor and source/drain regions of the second transistor, and the dielectric structure comprises a non-linear sidewall profile, the non-linear sidewall profile comprises a bottom sidewall, a first sidewall above the bottom sidewall, and a second sidewall above the first sidewall, wherein the bottom sidewall and the first sidewall are each disposed in the semiconductor fin, wherein the bottom sidewall is tilted from a direction normal to a substrate by a first angle, the first sidewall and the bottom sidewall form an included angle greater than the first angle, and the second sidewall is non-parallel with the bottom sidewall and the first sidewall.