Reduction characteristics of iodate ion on copper: Application to copper chemical mechanical polishing
Journal of Applied Electrochemistry, cilt.34, sa.9, ss.963-969, 2004 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 34 Sayı: 9
- Basım Tarihi: 2004
- Doi Numarası: 10.1023/b:jach.0000040549.05699.eb
- Dergi Adı: Journal of Applied Electrochemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.963-969
- Anahtar Kelimeler: CMP, copper, diffusion, iodate, kinetics, ELECTROCHEMICAL-BEHAVIOR, PLATINUM-ELECTRODES, SULPHURIC MEDIUM, ACID SOLUTIONS, TUNGSTEN, TECHNOLOGY, SURFACE, IODINE, DISK
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
Potentiodynamic and potentiostatic polarization, and the rotating disk electrode technique were used to study the reduction characteristics of iodate (IO3-) ion on copper (Cu). Depending on the relative concentrations of (IO3-) and H+. two pH regimes were observed. The cathodic current in the first regime (pH > 3) was controlled by H+ diffusion from the solution to the metal surface. In the second regime (pH < 3 and up to 10-2 M (IO3 -) concentration) the cathodic current was found to be under mixed control, involving reaction control via the electrochemical reduction of (IO3-) and transport control via the diffusion of I 2 (aq). It was concluded that (IO3-) was an effective oxidant for Cu chemical mechanical polishing (CMP) with strongly acidic (pH < 3) slurries but it was not convenient reagent as an oxidant for Cu CMP with weakly acidic (pH > 3) slurries.