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A novel Cu(II) chemical vapor deposition precursor: Synthesis, characterization, and chemical vapor deposition

Published online by Cambridge University Press:  31 January 2011

Anjana Devi ,
J. Goswami ,
R. Lakshmi ,
S. A. Shivashankar  and
S. Chandrasekaran
Anjana Devi
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012 India
J. Goswami
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012 India
R. Lakshmi
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012 India
S. A. Shivashankar
Affiliation:
Materials Research Centre, Indian Institute of Science, Bangalore-560 012 India
S. Chandrasekaran
Affiliation:
Department of Organic Chemistry, Indian Institute of Science, Bangalore-560 012 India
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Abstract

A nonfluorinated β-diketonate precursor, bis(t-butylacetoacetato)Cu(II) or Cu(tbaoac)2, was synthesized by modifying bis(dipivaloylmethanato)Cu(II) or Cu(dpm)2 for chemical vapor deposition (CVD) of copper. The complex was characterized by a variety of techniques, such as melting point determination, mass spectrometry, infraredspectroscopy, elemental analysis, thermogravimetric and differential thermal analysis, and x-ray diffraction. Cu(tbaoac)2 has a higher sublimation rate than Cu(dpm)2 over the temperature range 90–150 °C. Pyrolysis of Cu(tbaoac)2 leads to the formation of copper films at 225 °C, compared to 330 °C for Cu(dpm)2. As-deposited copper films ere highly dense, mirror-bright, adhered strongly to SiO2, and showed a resistivity of less than 2.9 μΩ-cm at a thickness as low as 1300 Å. A possible mechanism for the decomposition of the ligand tbaoac has been proposed.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 3 , March 1998 , pp. 687 - 692
Copyright
Copyright © Materials Research Society 1998

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