Patent ID: 11916140
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A compound semiconductor device comprising:
a first semiconductor layer having a fin extending in a first direction on a substrate;
an upper gate electrode extending in a second direction perpendicular to the first direction on the first semiconductor layer;
a second semiconductor layer disposed between a sidewall of the fin and the upper gate electrode;
a dielectric layer disposed between a top surface of the fin and the upper gate electrode;
a lower gate structure connected to a bottom surface of the first semiconductor layer by passing through the substrate; and
an interface insulation layer disposed between a top surface of the dielectric layer and the gate electrode,
wherein the interface insulation layer has a thickness less than a thickness of the dielectric layer.