In some embodiments, a semiconductor device is provided. The semiconductor device includes a first semiconductor fin that extends from a substrate. The first semiconductor fin has source and drain regions, which are separated from one another by a channel region in the first semiconductor fin. A gate overlies an upper surface and sidewalls of the channel region. A contact is coupled to the source or drain region of the first semiconductor fin, where the source or drain region includes a layer of epitaxial material with a substantially diamond-shaped cross-section. The contact surrounds the source or drain region on top and bottom surfaces of the substantially diamond-shaped cross-section. A first capping material is arranged along outer sidewalls of the first semiconductor fin under the contact. The first capping material has an uppermost surface that is spaced below a lowermost surface of the contact by a non-zero distance.