Effect of low-frequency radio frequency on plasma-enhanced chemical vapor deposited ultra low-κ dielectric films for very large-scale integrated interconnects

The addition of a low frequency RF (LFRF) component during plasma-enhanced chemical vapor deposition of porous SiCOH ultra low-κ films allowed for the incorporation of higher carbon content without lowering the Young's modulus or increasing the dielectric constant. The porous SiCOH films typica...

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Veröffentlicht in:Journal of applied physics 2014-04, Vol.115 (14)
Hauptverfasser: Todd Ryan, E., Gates, Stephen M., Cohen, Stephan A., Ostrovski, Yuri, Adams, Ed, Virwani, Kumar, Grill, Alfred
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container_issue 14
container_start_page
container_title Journal of applied physics
container_volume 115
creator Todd Ryan, E.
Gates, Stephen M.
Cohen, Stephan A.
Ostrovski, Yuri
Adams, Ed
Virwani, Kumar
Grill, Alfred
description The addition of a low frequency RF (LFRF) component during plasma-enhanced chemical vapor deposition of porous SiCOH ultra low-κ films allowed for the incorporation of higher carbon content without lowering the Young's modulus or increasing the dielectric constant. The porous SiCOH films typically contain carbon bonded into the silica matrix primarily as Si(CH3)x species. The low frequency RF increased the total carbon content by adding CH2 and –CH = CH- species with some reduction of Si(CH3)x species. It also altered the SiOx bonding structure by increasing network SiOx bonding at the expense of the suboxide, indicating an increase in SiOx crosslink density. Although higher carbon content usually lowers the modulus of porous SiCOH films, the modulus of the higher carbon films generated by LFRF did not decrease because of their increased network SiOx bonding.
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source AIP Journals; Alma/SFX Local Collection
subjects Applied physics
Carbon
Carbon content
Crosslinking
Low frequencies
Modulus of elasticity
Organic chemistry
Plasma enhanced chemical vapor deposition
Radio frequency
Silicon dioxide
title Effect of low-frequency radio frequency on plasma-enhanced chemical vapor deposited ultra low-κ dielectric films for very large-scale integrated interconnects
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