Invention Grant
- Patent Title: Bilayer metal capping layer for interconnect applications
- Patent Title (中): 用于互连应用的双层金属覆盖层
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Application No.: US12039280Application Date: 2008-02-28
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Publication No.: US07834457B2Publication Date: 2010-11-16
- Inventor: Chih-Chao Yang , Satya V. Nitta
- Applicant: Chih-Chao Yang , Satya V. Nitta
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Agent Louis J. Percello, Esq,
- Main IPC: H01L21/768
- IPC: H01L21/768

Abstract:
The invention provides semiconductor interconnect structures that have improved reliability and technology extendibility. In the present invention, a second metallic capping layer is located on a surface of a first metallic cap layer which is, in turn, located on a surface of the conductive feature embedded within a first dielectric material. Both the first and second metallic capping layers are located beneath an opening, e.g., a via opening, the is present within an overlying second dielectric material. The second metallic capping layer protects the first dielectric capping layer from being removed (either completely or partially) during subsequent processing steps. Interconnect structures including via gouging features as well as non-via gouging features are disclosed. The present invention provides methods of fabricating such semiconductor interconnect structures.
Public/Granted literature
- US20090218691A1 BILAYER METAL CAPPING LAYER FOR INTERCONNECT APPLICATIONS Public/Granted day:2009-09-03
Information query
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