FABRICATION OF INSULATING FENCE FINS

摘要

A semiconductor structure may be formed by forming a first semiconductor fin and a second inactive semiconductor fin above a substrate; depositing a masking layer above the first semiconductor fin and the second semiconductor fin; etching a trench in the masking layer exposing the second semiconductor fin while the first semiconductor fin remains covered by the masking layer; removing the second semiconductor fin to form a fin recess beneath the trench; filling the fin recess with an insulating material to form an insulating fence fin; and removing the masking layer to expose the first semiconductor fin and the insulating fence fin. A third semiconductor fin separating the first semiconductor fin from the second semiconductor fin may also be formed prior to depositing the masking layer and covered by the masking layer. The first semiconductor fin may be a pFET fin and the third semiconductor fin may be an nFET fin.

主权项

1. A semiconductor structure comprising:
a first fin region comprising one or more first semiconductor fins on a substrate; a second fin region comprising one or more second semiconductor fins on the substrate; and an electrically inactive fence fin region separating the first fin region from the second fin region, wherein the electrically inactive fence fin region comprises one or more dielectric fins on the substrate.