FinFET with reduced gate to fin overlay sensitivity

摘要

Embodiments of the invention provide a relatively uniform width fin in a Fin Field Effect Transistors (FinFETs) and apparatus and methods for forming the same. A fin structure may be formed such that the surface of a sidewall portion of the fin structure is normal to a first crystallographic direction. Tapered regions at the end of the fin structure may be normal to a second crystal direction. A crystallographic dependent etch may be performed on the fin structure. The crystallographic dependent etch may remove material from portions of the fin normal to the second crystal direction relatively faster, thereby resulting in a relatively uniform width fin structure.