Patent ID: 11973021
Assignee: VANGUARD INTERNATIONAL SEMICONDUCTOR CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a first metal layer,
a second metal layer, wherein from a top view, each of the first metal layer and the second metal layer has round corners; and
an inter-metal dielectric layer disposed between the first metal layer and the second metal layer, wherein the inter-metal dielectric layer comprises:
a first dielectric layer disposed on the first metal layer and in direct contact with the first metal layer, wherein the first dielectric layer has a stress value less than 0;
a second dielectric layer disposed on the first dielectric layer, wherein the second dielectric layer has a stress value greater than 0; and
a third dielectric layer disposed on the second dielectric layer, wherein the third dielectric layer has a stress value less than 0, wherein a thickness of the third dielectric layer is greater than a thickness of the second dielectric layer, and the thickness of the second dielectric layer is greater than a thickness of the first dielectric layer.