Patent ID: 11937415
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of forming a semiconductor device, comprising:
providing a substrate including a well doped with a first type dopant, the well extending lengthwise in a first direction;
forming a mandrel over the well, the mandrel extending lengthwise in the first direction;
forming spacers on sidewalls of the mandrel;
removing a first portion of the mandrel that is above a first region of the well, wherein a second portion of the mandrel that is above a second region of the well remains;
patterning the substrate using the spacers above the first region of the well and the mandrel above the second region of the well as a patterning mask, thereby forming a fin line over the first and second regions; and
performing a fin cut process to remove a middle portion of the fin line, thereby forming a first fin above the first region of the well and a second fin above the second region of the well, wherein the second fin is wider than the first fin along a second direction perpendicular to the first direction.