US Patent 12002717 Semiconductor device and method

An embodiment device includes: first fins protruding from an isolation region; second fins protruding from the isolation region; a first fin spacer on a first sidewall of one of the first fins, the first fin spacer disposed on the isolation region, the first fin spacer having a first spacer height; a second fin spacer on a second sidewall of one of the second fins, the second fin spacer disposed on the isolation region, the second fin spacer having a second spacer height, the first spacer height greater than the second spacer height; a first epitaxial source/drain region on the first fin spacer and in the first fins, the first epitaxial source/drain region having a first width; and a second epitaxial source/drain region on the second fin spacer and in the second fins, the second epitaxial source/drain region having a second width, the first width greater than the second width.