Patent ID: 9472672
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A fin field-effect transistor (FinFET), comprising: a first well of a first conductivity type; a second well of a second conductivity type, the first conductivity type being different than the second conductivity type, the first well and the second well forming a p-n junction; an inner fin; an outer fin spaced apart from the inner fin by a first shallow trench isolation (STI) region; a first isolation fin spaced apart from the outer fin by a second STI region, the first isolation fin including a first body portion, a first isolation oxide over a top surface of the first body portion, and a first etch stop layer, the first etch stop layer interposed between the first body portion and the first isolation oxide and between the second STI region and the first isolation oxide, the first isolation fin being interposed between the p-n junction and the outer fin; a second isolation fin spaced apart from the first isolation fin by a third STI region, the second isolation fin including a second body portion, a second isolation oxide over the second body portion, and a second etch stop layer, the second etch stop layer interposed between the second body portion and the second isolation oxide and between the third STI region and the second isolation oxide, no active fin being interposed between the first isolation fin and the second isolation fin, the p-n junction being interposed between the first isolation fin and the second isolation fin; and a gate over the inner fin, the outer fin, the first isolation fin and the second isolation fin.