United Microelectronics Corp.

Kok Seen Lew

Yi-Wei Chen

Chien-Chung Huang

A method of manufacturing a semiconductor device includes forming an epitaxial layer within a source/drain region of a semiconductor substrate, forming a fluorine-containing layer on the surface of the epitaxial layer, forming a metal gate structure within the gate region after the step of forming the fluorine-containing layer, forming an interlayer dielectric to cover the semiconductor substrate, the epitaxial layer and the metal gate structure, forming a contact hole penetrating the interlayer dielectric to expose a portion of the epitaxial layer, forming a metal silicide layer on or in the epitaxial layer on a bottom of the contact hole so that the fluorine-containing layer is disposed on the periphery of the metal silicide layer.

Method of manufacturing a semiconductor device

A semiconductor device includes a semiconductor substrate, a metal gate structure, at least an epitaxial layer, an interlayer dielectric, at least a contact hole, at least a metal silicide layer and a fluorine-containing layer. The semiconductor substrate has at least a gate region and at least a source/drain region adjoining the gate region. The gate structure is disposed on the semiconductor substrate within the gate region. The epitaxial layer is disposed on the semiconductor substrate within the source/drain region. The interlayer dielectric covers the semiconductor substrate, the gate structure and the epitaxial layer. The contact hole penetrates the interlayer dielectric to reach the epitaxial layer. The metal silicide layer is formed in the epitaxial layer and is located on the bottom of the contact hole. The fluorine-containing layer is disposed on or in the epitaxial layer and is around sides of the metal silicide layer.

Growing community of inventors

Hsinchu, Taiwan

Kok Seen Lew