Patent ID: 11942476
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method for forming a semiconductor device, comprising:
forming first and second nanostructured pedestals on a substrate;
conformally forming a first dielectric layer over the first and second nanostructured pedestals;
forming an oxide material on the first dielectric layer, the first dielectric layer cupping an underside of the oxide material;
conformally forming a second dielectric layer over the first dielectric layer and the oxide material;
planarizing the first and second dielectric layers to expose the first and second nanostructured pedestals, while leaving a remainder of the second dielectric layer covering the oxide material;
forming a first metal layer wrapping around the first nanostructured pedestal and a second metal layer wrapping around the second nanostructured pedestal; and
growing first epitaxial structures on opposite sides of the first metal layer and second epitaxial structures on opposite sides of the second metal layer.