Epitaxial growth of Cu on Si by magnetron sputtering

Journal Article · Sun Nov 01 04:00:00 EST 1998 · Journal of Vacuum Science and Technology, A

DOI:https://doi.org/10.1116/1.581489· OSTI ID:664686

Jiang, H; Klemmer, T J; Barnard, J A ^[1]; Payzant, E A ^[2]

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1. Center for Materials for Information Technology, The University of Alabama, Tuscaloosa, Alabama 35487-0209 (United States)
2. High Temperature Materials Laboratory, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6064 (United States)

Epitaxial Cu films were grown on H-terminated Si(100), Si(110) and Si(111) substrates by magnetron sputtering. The epitaxial orientation relationships and microstructural characteristics of the Cu films were studied by x-ray diffraction (XRD) including the conventional {theta}-2{theta} mode, rocking curve and pole figures, as well as by transmission electron microscopy. The results of both pole figure and electron diffraction reveal the epitaxial orientation relationship of the Cu/Si epitaxial system is as follows: Cu(100)/Si(100) with Cu[010]//Si[011]; Cu(111)//Si(110) with Cu[{bar 1}10]//Si[001] and Cu[1{bar 1}0]//Si[001] which are twin related; and for the Cu/Si(111) system the Cu film grows primarily in the epitaxial relationship of Cu(111)/Si(111) with Cu[1{bar 1}0]//Si[{bar 2}11]. It is shown by XRD that Si(110) is a more favorable substrate than Si(111) for the epitaxial growth of Cu(111). An ultrathin Cu(111) film (up to 2.5 nm) with high epitaxial quality can be grown on Si(110). The epitaxial relationships of the Cu/Si are discussed on the basis of geometrical lattice matching, including the invariant-line criterion and the superlattice area mismatch rule. {copyright} {ital 1998 American Vacuum Society.}

• OSTI ID: 664686
• Journal Information: Journal of Vacuum Science and Technology, A, Journal Name: Journal of Vacuum Science and Technology, A Journal Issue: 6 Vol. 16; ISSN 0734-2101; ISSN JVTAD6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER
CRYSTAL STRUCTURE
ELECTRON DIFFRACTION
EPITAXY
HYDROGEN
MICROSTRUCTURE
SILICON
SPUTTERING
STRUCTURAL CHEMICAL ANALYSIS
SURFACE TREATMENTS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION