Patent ID: 11906572
Assignee: SHANGHAI HUALI INTEGRATED CIRCUIT CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. A test structure for online detection of a metal via open circuit, comprising:
a doped substrate;
a contact layer on the doped substrate;
a first metal layer on the contact layer;
a first metal via layer on the first metal layer;
a second metal layer on the first metal via layer;
a second metal via layer on the second metal layer;
a third metal layer on the second metal via layer;
a third metal via layer on the third metal layer; and
a fourth metal layer on the third metal via layer,
wherein the contact layer comprises a plurality of contacts, the plurality of contacts being connected to the first metal layer, the first metal via layer comprises a plurality of first vias, the plurality of first vias being filled with metal, and the plurality of first vias being connected to the second metal layer.