Patent ID: 11869769
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of fabricating a semiconductor device, comprising:
placing a substrate on a susceptor that is disposed in a chamber, wherein the substrate has a semiconductor surface exposed;
providing a plurality of UV radiation lamps operable to direct UV radiation to the substrate:
performing an epitaxial growth process to form an epitaxial feature on the semiconductor surface of the substrate, wherein UV radiation is introduced to the semiconductor surface from the plurality of UV radiation lamps in a first configuration during a first portion of the epitaxial growth process and UV radiation is introduced to the semiconductor surface from the plurality of UV radiation lamps in a second configuration during a second portion of the epitaxial growth process, wherein the first and second configurations provide for anisotropic growth of the epitaxial feature; and wherein the first configuration provides UV radiation at a direction normal to the semiconductor surface of the substrate, and the first portion of the epitaxial growth is from a horizontal plane; and wherein the second configuration provides UV radiation at an angle less than 90 degrees from the semiconductor surface of the substrate, and the second portion of the epitaxial growth is from a vertical plane.