Process of metal interconnects
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United States of America Patent
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Jul 8, 2008
Grant Date -
Nov 10, 2005
app pub date -
Jun 16, 2005
filing date -
Nov 11, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A process of metal interconnects and a structure of metal interconnect produced therefrom are provided. An opening is formed in a dielectric layer. A metal layer is formed over the dielectric layer filling the opening. A film layer is formed on the metal layer and the dielectric layer. The film layer is reacted with the metal layer during a thermal process, and a protective layer is formed on the surface of the metal layer. The portion of the film layer not reacted with the metal layer is removed to avoid short between the metal layers. The protective layer can protect the surface of the metal layer from being oxidized and thus the stability and the reliability of the semiconductor device can be effectively promoted.
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