Patent ID: 11871559
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method of fabricating a semiconductor device, the method comprising:
forming an active region extending in a first direction, the active region being defined by a device isolation region;
forming a gate trench extending in a second direction across the active region and the device isolation region, the second direction being different from the first direction;
forming a sacrificial material layer on an inner surface of the gate trench so that a bottom surface of the gate trench is exposed;
etching the exposed bottom surface of the gate trench of the active region to form a barrier recess;
forming a barrier material layer in the barrier recess and on an entire exposed surface;
partially removing the barrier material layer to define an insulating barrier film in the barrier recess;
forming a channel region on the insulating barrier film;
removing sacrificial material layer;
forming a gate dielectric film in the gate trench; and
forming a gate structure in the gate trench.