US Patent 11842931 Semiconductor arrangement and method for manufacturing the same

Provided are a semiconductor arrangement and a method for manufacturing the same. An example arrangement may comprise: a bulk semiconductor substrate; a fin formed on the substrate; a first FinFET and a second FinFET formed on the substrate, wherein the first FinFET comprises a first gate stack intersecting the fin and a first gate spacer disposed on sidewalls of the first gate stack, the second FinFET comprises a second gate stack intersecting the fin and a second gate spacer disposed on sidewalls of the second gate stack; a dummy gate spacer formed between the first FinFET and the second FinFET and intersecting the fin; a first isolation section self-aligned to a space defined by the dummy gate spacer, wherein the isolation section electrically isolates the first FinFET from the second FinFET; and a second isolation layer disposed under a bottom surface of the first isolation section.