Effects of porous carbon additives and induced fluorine on low dielectric constant polyimide synthesized with an e-beam

We report the synthesis of a polyimide matrix with a low dielectric constant for application as an intercalation material between metal interconnections in electronic devices. Porous activated carbon was embedded in the polyimide to reduce the dielectric constant, and a thin film of the complex was...

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Bibliographic Details
Published in:Materials research bulletin 2010-11, Vol.45 (11), p.1641-1647
Main Authors: Im, Ji Sun, Bae, Tae-Sung, Lee, Sung Kyu, Lee, Sei-Hyun, Jeong, Euigyung, Kang, Phil Hyun, Lee, Young-Seak
Format: Article
Language:English
Subjects:
A. Fluorides
A. Inorganic compounds
A. Interfaces
A. Surfaces
ACTIVATED CARBON
D. Electrical properties
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
FLUORIDES
FLUORINE
FREE ENERGY
INTERFACES
MATERIALS SCIENCE
PERMITTIVITY
POROUS MATERIALS
SURFACES
SYNTHESIS
THIN FILMS
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Summary:We report the synthesis of a polyimide matrix with a low dielectric constant for application as an intercalation material between metal interconnections in electronic devices. Porous activated carbon was embedded in the polyimide to reduce the dielectric constant, and a thin film of the complex was obtained using the spin-coating and e-beam irradiation methods. The surface of the thin film was modified with fluorine functional groups to impart water resistance and reduce the dielectric constant further. The water resistance was significantly improved by the modification with hydrophobic fluorine groups. The dielectric constant was effectively decreased by porous activated carbon. The fluorine modification also resulted in a low dielectric constant on the polyimide surface by reducing the polar surface free energy. The dielectric constant of polyimide film decreased from 2.98 to 1.9 by effects of porous activated carbon additive and fluorine surface modification.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2010.07.005