Patent ID: 11862693
Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A method of forming a semiconductor device, comprising:
providing a substrate having a source region and a drain region, a gate arranged over the substrate and between the source region and the drain region, and a first interlevel dielectric (ILD) layer at least partially arranged over the substrate and the gate;
forming at least one drain contact extending through the first ILD layer over the drain region;
forming a conductive field plate over the first ILD layer, wherein the conductive field plate comprises a first plate portion and a second plate portion separated by a plate opening; and
forming a drain captive structure in the first ILD layer and partially over the drain region, the drain captive structure comprises a first ring-type barrier and a second ring-type barrier, wherein each of the first ring-type barrier and the second ring-type barrier surrounds the at least one drain contact, and the first ring-type barrier and the second ring-type barrier define a trench therebetween, wherein the trench comprises an air gap, and wherein the drain captive structure is laterally spaced apart from sidewalls of the gate;
wherein the first plate portion overlaps and directly contacts the second ring-type barrier, and the second plate portion is a continuous plate which overlaps and directly contacts the at least one drain contact and the first ring-type barrier.