Patent ID: 7067360
Filing Date: 2006-06-27
Classification: H01L

Abstract:
1. A method of fabricating a fin field effect transistor, comprising: forming a thermal oxide layer as a hard mask for etching a silicon fin on an SOI substrate; transcribing a fin pattern; forming a fin FET body by etching using the fin pattern as an etch mask; growing a sacrificial silicon oxide layer to restore a sidewall damaged by the etching; removing the sacrificial silicon oxide layer; depositing a high-K dielectric as a gate dielectric; depositing a metal layer; planarizing the metal layer to a height of a hard oxide; forming a nitride layer on the planarized metal layer; patterning the nitride layer using a hard oxide mask for forming a pattern to form a nitride layer pattern; forming a metal gate using the nitride layer pattern; removing a remaining hard oxide mask using high frequency; and growing a sidewall oxide layer on the metal gate.