Patent ID: 11895825
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method of forming a semiconductor device, comprising:
forming a trench in an insulating base;
forming a transistor, wherein the transistor comprises a gate electrode and a vertical channel formed within the trench, and a drain electrode and a source electrode formed outside the trench;
forming an isolation layer on the gate electrode in the trench; and
forming a capacitor including a trench capacitor portion that is on the isolation layer in the trench, and a stacked capacitor portion that is coupled to the source electrode of the transistor outside the trench, wherein the forming of the capacitor comprises:
forming a lower conductive layer on the isolation layer in the trench; and
forming a plurality of stacked conductive layers outside the trench, the plurality of stacked conductive layers being coupled to the source electrode of the transistor.