Electrochemical Study of Under-Potential Deposition Processes on Transition Metal Surfaces

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Copper under-potential deposition (UPD) on iridium was studied due to important implications it presents to the semiconductor industry. Copper UPD allows controlled superfilling on sub-micrometer trenches; iridium has characteristics to prevent copper interconnect penetration into the surrounding dielectric. Copper UPD is not favored on iridium oxides but data shows copper over-potential deposition when lower oxidation state Ir oxide is formed. Effect of anions in solution on silver UPD at platinum (Pt) electrodes was studied with the electrochemical quartz crystal microbalance. Silver UPD forms about one monolayer in the three different electrolytes employed. When phosphoric acid is used, silver oxide growth ... continued below

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Flores Araujo, Sarah Cecilia August 2006.

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  • Flores Araujo, Sarah Cecilia

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Copper under-potential deposition (UPD) on iridium was studied due to important implications it presents to the semiconductor industry. Copper UPD allows controlled superfilling on sub-micrometer trenches; iridium has characteristics to prevent copper interconnect penetration into the surrounding dielectric. Copper UPD is not favored on iridium oxides but data shows copper over-potential deposition when lower oxidation state Ir oxide is formed. Effect of anions in solution on silver UPD at platinum (Pt) electrodes was studied with the electrochemical quartz crystal microbalance. Silver UPD forms about one monolayer in the three different electrolytes employed. When phosphoric acid is used, silver oxide growth is identified due to presence of low coverage hydrous oxide species at potentials prior to the monolayer oxide region oxide region.

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  • August 2006

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  • May 5, 2008, 2:44 p.m.

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  • Dec. 15, 2008, 5:14 p.m.

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Flores Araujo, Sarah Cecilia. Electrochemical Study of Under-Potential Deposition Processes on Transition Metal Surfaces, thesis, August 2006; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc5372/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .