CPC H01L 29/1606 (2013.01) [H01L 29/408 (2013.01); H01L 29/40111 (2019.08); H01L 29/93 (2013.01)] | 20 Claims |
1. A varactor comprising:
a gate electrode;
a graphene layer; and
a ferroelectric layer between the gate electrode and the graphene layer,
wherein a capacitance tuning range of the varactor is based at least partially on a quantum capacitance effect of the graphene layer, and
wherein a capacitance state of the varactor is non-volatile and based at least partially on the quantum capacitance effect.
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