Patent ID: 11972973
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor structure, comprising:
a conductive line of an Nth metal layer, wherein N is equal to 1 or greater;
a first insulating layer on the conductive line and free from covering a portion of the conductive line;
a first dielectric layer on the first insulating layer and free from covering the portion of the conductive line and a portion of the first insulating layer;
a second insulating layer on the first dielectric layer and free from covering the portion of the conductive line;
an interconnect base laterally surrounded by the first dielectric layer, the first insulating layer, and the second insulating layer, wherein a top surface of the interconnect base and a top surface of the second insulating layer are coplanar;
an interconnect body over the second insulating layer and in contact with the top surface of the interconnect base; and
a second dielectric layer configured to isolate the interconnect body from a conductive trace over the second insulating layer;
wherein the interconnect body comprises:
a first barrier layer in direct contact with the interconnect base and sidewalls of the second dielectric layer;
at least one conductive layer surrounded by the barrier layer;
a first copper-phosphorous alloy layer sandwiched by the first barrier layer and the at least one conductive layer;
a second copper-phosphorous alloy layer formed on the at least one conductive layer; and
a second barrier layer formed on the second copper-phosphorous alloy layer.