Patent ID: 11961836
Assignee: INTEL CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A FinFET varactor, comprising:
an N-type well within a substrate;
a plurality of fins along a first direction extending above a surface of the substrate over the N-type well, the plurality of fins spaced apart from one another;
a plurality of gates over the plurality of fins that extend above the surface of a substrate, the plurality of gates along a second direction substantially orthogonal with the first direction;
an insulating layer that surrounds and is in contact with respective ones of the plurality of fins in-between the substrate and the plurality of gates; and
an N-type doping in the substrate between the plurality of fins and the N-type well, the N-type doping extending vertically from the substrate to only a portion a height of the respective ones of the plurality of fins that extend above the surface of the substrate and below the plurality of gates, wherein the N-type doping has a doping concentration of 2e18-7e18.