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Thermal stability of benzotriazole on copper during atmospheric corrosion
Author(s) -
Christensen T. M.,
Sorensen N. R.
Publication year - 1991
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740170104
Subject(s) - benzotriazole , x ray photoelectron spectroscopy , copper , sulfidation , chemistry , thermal stability , corrosion , crystallite , sulfur , atmospheric temperature range , inorganic chemistry , alloy , analytical chemistry (journal) , metallurgy , chemical engineering , materials science , environmental chemistry , organic chemistry , physics , meteorology , engineering
Atmospheric corrosion of copper can result in substantial problems for electrical interconnection in microelectronic applications. We have used x‐ray photoelectron spectroscopy (XPS) to examine the effects of benzotriazole (BTA), an organic corrosion inhibitor, on atmospheric oxidation and sulfidation of polycrystalline copper in the temperature range 30‐200 °C. XPS results demonstrated that BTA was lost depended on the ambient composition. BTA was least stable in sulfur‐containing environments, disappearing from the surface at temperatures above 150 °C. BTA was quite stable in pure nitrogen and in a vacuum up to temperatures near 200 °C. This suggests that the loss mechanism involved a chemical reaction rather than solely a thermal process. The BTA‐Cu(II) complex existing at room temperature was irreversibly converted into a BTA‐Cr(I) complex upon heating above 90 °C in a vacuum.