Patent ID: 11949008
Assignee: WIN SEMICONDUCTORS CORP.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method for forming a semiconductor structure, comprising:
forming a III-V compound semiconductor layer on a front side of a substrate;
forming a first contact metal layer on the III-V compound semiconductor layer, wherein the first contact metal layer comprises molybdenum, tungsten, iridium, palladium, platinum, cobalt, ruthenium, osmium, rhodium, rhenium, or a combination thereof;
forming a second contact metal layer on the first contact metal layer, wherein the second contact metal layer covers the first contact metal layer;
forming a third contact metal layer on the second contact metal layer, wherein the third contact metal layer covers the second contact metal layer; and
forming a via hole, wherein the via hole penetrates through the substrate and the III-V compound semiconductor layer from a back side of the substrate and exposes a portion of the first contact metal layer.