Method of fabricating semiconductor device
The present invention provides a Cu line and method of forming the same, by which reliability (e.g., EM, BTS and the like) can be enhanced by replacing SiN by HfOx, which plays a role as a protective layer and/or an etch stop layer on a Cu line, prevents or inhibits galvanic corrosion due to Cu oxide, and inhibits or reduces additional formation of Cu oxide by gathering or scavenging oxygen atoms from —OH, O2, and H2O. The present method includes the steps of forming a trench in an insulating layer on a substrate, forming a planarized Cu layer in the trench, forming a HfOx layer on the planarized Cu layer, and thermally treating the substrate.
Dongbu Electronics Co., Ltd.
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Jung Joo
Kim