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Nonfluorinated volatile copper(I) 1,3-diketiminates as precursors for Cu metal deposition via atomic layer deposition
Kyung-Ho Park1, Alexander Z Bradley, Jeffery S Thompson
1Central Research and Development, DuPont Company, Experimental Station, Wilmington, Delaware 19880-0328, USA. kyung-ho.park@usa.dupont.com
Abstract:
Novel nonfluorinated Cu(diketiminate)L complexes with L = neutral olefinic ligand have been prepared as stable, volatile Cu(I) precursors for the deposition of copper films by an atomic layer deposition (ALD) process. Among them, the complexes of 4-a and 5-a are the most volatile and stable at low temperature (55 degrees C). A clean, conformal copper film was deposited at 120 degrees C in an ALD process. These Cu(I) complexes are the first examples of nonfluorinated copper(I) diketiminates that can be readily applied to an industrial microelectronic fabrication process.
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