The present invention relates to a semiconductor device that contains a
trench metal-insulator-metal (MIM) capacitor and a field effect
transistor (FET). The trench MIM capacitor comprises a first metallic
electrode layer located over interior walls of a trench in a substrate, a
dielectric layer located in the trench over the first metallic electrode
layer, and a second metallic electrode layer located in the trench over
the dielectric layer. The FET comprises a source region, a drain region,
a channel region between the source and drain regions, and a gate
electrode over the channel region. The trench MIM capacitor is connected
to the FET by a metallic strap. The semiconductor device of the present
invention can be fabricated by a process in which the trench MIM
capacitor is formed after the FET source/drain region but before the FET
source/drain metal silicide contacts, for minimizing metal contamination
in the FET.