Patent ID: 11908939
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A method comprising:
forming a plurality of first fins in a first area and a plurality of second fins in a second area, wherein each first fin from the plurality of first fins includes a semiconductor material layer;
forming a dielectric layer over the plurality of first fins in the first area and the plurality of second fins in the second area, wherein the dielectric layer covers the plurality of first fins and the plurality of second fins;
removing a first portion of the dielectric layer in the first area, wherein a second portion of the dielectric layer remains in the second area; and
removing at least a portion of the semiconductor material layer from each of the plurality of first fins to form a plurality of semiconductor protrusions, wherein the plurality of semiconductor protrusions are shorter than the plurality of second fins, wherein the plurality of semiconductor protrusions physically contact the dielectric layer.