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Showing 1 to 4 of 4 (0.03 seconds)Spelling suggestions: "subject:"galvanik"" "subject:"galvanic""
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Thermal ALD of Cu via Reduction of CuxO films for the Advanced Metallization in Spintronic and ULSI Interconnect SystemsMueller, Steve, Waechtler, Thomas, Hofmann, Lutz, Tuchscherer, Andre, Mothes, Robert, Gordan, Ovidiu, Lehmann, Daniel, Haidu, Francisc, Ogiewa, Marcel, Gerlich, Lukas, Ding, Shao-Feng, Schulz, Stefan E., Gessner, Thomas, Lang, Heinrich, Zahn, Dietrich R.T., Qu, Xin-Ping 21 February 2012 (has links) (PDF)
In this work, an approach for copper atomic layer deposition (ALD) via reduction of CuxO films was investigated regarding applications in ULSI interconnects, like Cu seed layers directly grown on diffusion barriers (e. g. TaN) or possible liner materials (e. g. Ru or Ni) as well as non-ferromagnetic spacer layers between ferromagnetic films in GMR sensor elements, like Ni or Co. The thermal CuxO ALD process is based on the Cu (I) β-diketonate precursor [(nBu3P)2Cu(acac)] and a mixture of water vapor and oxygen ("wet O2") as co-reactant at temperatures between 100 and 130 °C. Highly efficient conversions of the CuxO to metallic Cu films are realized by a vapor phase treatment with formic acid (HCOOH), especially on Ru substrates. Electrochemical deposition (ECD) experiments on Cu ALD seed / Ru liner stacks in typical interconnect patterns are showing nearly perfectly filling behavior. For improving the HCOOH reduction on arbitrary substrates, a catalytic amount of Ru was successful introduced into the CuxO films during the ALD with a precursor mixture of the Cu (I) β-diketonate and an organometallic Ru precursor. Furthermore, molecular and atomic hydrogen were studied as promising alternative reducing agents.
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ALD-grown seed layers for electrochemical copper deposition integrated with different diffusion barrier systemsWaechtler, Thomas, Ding, Shao-Feng, Hofmann, Lutz, Mothes, Robert, Xie, Qi, Oswald, Steffen, Detavernier, Christophe, Schulz, Stefan E., Qu, Xin-Ping, Lang, Heinrich, Gessner, Thomas 18 May 2011 (has links) (PDF)
The deposition of Cu seed layers for electrochemical Cu deposition (ECD) via atomic layer deposition (ALD) of copper oxide and subsequent thermal reduction at temperatures between 110 and 120°C was studied on different diffusion barrier systems. While optimization of the process is required on TaN with respect to reduction and plating, promising results were obtained on blanket PVD Ru. The plating results on layers of ALD Cu with underlying Ru even outperformed the ones achieved on PVD Cu seed layers with respect to morphology and resistivity. Applying the processes to via and line patterns gave similar results, suggesting that a combination of ALD Cu with PVD or ALD-grown Ru could significantly improve the ECD Cu growth.
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ALD-grown seed layers for electrochemical copper deposition integrated with different diffusion barrier systemsWaechtler, Thomas, Ding, Shao-Feng, Hofmann, Lutz, Mothes, Robert, Xie, Qi, Oswald, Steffen, Detavernier, Christophe, Schulz, Stefan E., Qu, Xin-Ping, Lang, Heinrich, Gessner, Thomas January 2011 (has links)
The deposition of Cu seed layers for electrochemical Cu deposition (ECD) via atomic layer deposition (ALD) of copper oxide and subsequent thermal reduction at temperatures between 110 and 120°C was studied on different diffusion barrier systems. While optimization of the process is required on TaN with respect to reduction and plating, promising results were obtained on blanket PVD Ru. The plating results on layers of ALD Cu with underlying Ru even outperformed the ones achieved on PVD Cu seed layers with respect to morphology and resistivity. Applying the processes to via and line patterns gave similar results, suggesting that a combination of ALD Cu with PVD or ALD-grown Ru could significantly improve the ECD Cu growth.
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Thermal ALD of Cu via Reduction of CuxO films for the Advanced Metallization in Spintronic and ULSI Interconnect SystemsMueller, Steve, Waechtler, Thomas, Hofmann, Lutz, Tuchscherer, Andre, Mothes, Robert, Gordan, Ovidiu, Lehmann, Daniel, Haidu, Francisc, Ogiewa, Marcel, Gerlich, Lukas, Ding, Shao-Feng, Schulz, Stefan E., Gessner, Thomas, Lang, Heinrich, Zahn, Dietrich R.T., Qu, Xin-Ping January 2011 (has links)
In this work, an approach for copper atomic layer deposition (ALD) via reduction of CuxO films was investigated regarding applications in ULSI interconnects, like Cu seed layers directly grown on diffusion barriers (e. g. TaN) or possible liner materials (e. g. Ru or Ni) as well as non-ferromagnetic spacer layers between ferromagnetic films in GMR sensor elements, like Ni or Co. The thermal CuxO ALD process is based on the Cu (I) β-diketonate precursor [(nBu3P)2Cu(acac)] and a mixture of water vapor and oxygen ("wet O2") as co-reactant at temperatures between 100 and 130 °C. Highly efficient conversions of the CuxO to metallic Cu films are realized by a vapor phase treatment with formic acid (HCOOH), especially on Ru substrates. Electrochemical deposition (ECD) experiments on Cu ALD seed / Ru liner stacks in typical interconnect patterns are showing nearly perfectly filling behavior. For improving the HCOOH reduction on arbitrary substrates, a catalytic amount of Ru was successful introduced into the CuxO films during the ALD with a precursor mixture of the Cu (I) β-diketonate and an organometallic Ru precursor. Furthermore, molecular and atomic hydrogen were studied as promising alternative reducing agents.
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