Patent ID: 9735111
Date: 2017-08-15
CPC Classifications: H01L

Claim:
1. A method of making a semiconductor device, the method comprising: forming a first source/drain trench over a first source/drain region in a first transistor and a second source/drain trench over a second source/drain region in a second transistor; forming a first silicon dioxide layer in the first source/drain trench and a second silicon dioxide layer in the second source/drain trench; forming a first source/drain contact over the first source/drain region, the first source/drain contact comprising a first tri-layer contact disposed between the first silicon dioxide layer and a first conductive material; and forming a second source/drain contact over the second source/drain region, the second source/drain contact comprising a second tri-layer contact disposed between the second silicon dioxide layer and a second conductive material; wherein the first tri-layer contact comprises a first metal oxide layer in contact with the first silicon dioxide layer, and the second tri-layer contact comprises a second metal oxide layer in contact with the second silicon dioxide layer.