Patent ID: 9142649
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A fin field effect transistor (Fin FET), comprising: a substrate; at least one fin structure formed on said substrate; a gate formed on said at least one fin structure; epitaxial structures formed respectively in said at least one fin structure at both sides of said gate; and low-K spacers, a portion of the low-k spacers filling up at least one recess between said gate and said epitaxial structures and another portion of the low-k spacers filling up at least one recess surrounding said at least one fin structure, wherein a top surface of the portion of the low-k spacers filling up the at least one recess between said gate and said epitaxial structures and a top surface of the another portion of said low-K spacers filling up the at least one recess surrounding said at least one fin structure are leveled with a top surface of said epitaxial structures, higher than a top surface of the at least one fin structure, and lower than a top surface of the gate.