Patent ID: 11894435
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method of forming a semiconductor device, the method comprising:
forming a gate stack over a substrate;
forming a first dielectric layer over the gate stack, the first dielectric layer comprising a first material;
forming a second dielectric layer over the first dielectric layer, the second dielectric layer comprising a second material different from the first material;
forming a third dielectric layer over the second dielectric layer;
forming a first conductive feature adjacent the gate stack, wherein a topmost surface of the first conductive feature is level with a topmost surface of the third dielectric layer in a cross-sectional view; and
forming a second conductive feature over and in physical contact with the topmost surface of the first conductive feature in the cross-sectional view, a bottommost surface of the second conductive feature in the cross-sectional view being in physical contact with a topmost surface of the second dielectric layer in the cross-sectional view.