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Shin, Tae Joo
UNIST Synchrotron Radiation Research Laboratory
Research Interests
  • Synchrotron Radiation Application Researches

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Synchrotron X-ray reflectivity studies of nanoporous organosilicate thin films with low dielectric constants

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Title
Synchrotron X-ray reflectivity studies of nanoporous organosilicate thin films with low dielectric constants
Author
Oh, WeontaeHwang, YongtaekShin, Tae JooLee, ByeongduKim, Jong-SeongYoon, JinhwanBrennan, SeanMehta, ApurvaRee, Moonhor
Keywords
Electron density; Nanopores; Nanoporous dielectric; Porogen; Porosity; Thin film structure; X-ray reflectivity
Issue Date
2007-04
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF APPLIED CRYSTALLOGRAPHY, v.40, no., pp.S626 - S630
Abstract
Quantitative, non-destructive X-ray reflectivity analysis using synchrotron radiation sources was successfully performed on nanoporous dielectric thin films prepared by thermal processing of blend films of a thermally curable polymethylsilsesquioxane dielectric precursor and a thermally labile triethoxy-silyl-terminated six-arm poly(epsilon-caprolactone) porogen in various compositions. In addition, thermogravimetric analysis and transmission electron microscopy analysis were carried out. These measurements provided important structural information about the nanoporous films. The thermal process used in this study was found to cause the porogen molecules to undergo efficiently sacrificial thermal degradation, generating closed, spherical nanopores in the dielectric film. The resultant nanoporous films exhibited a homogeneous, well defined structure with a thin skin layer and low surface roughness. In particular, no skin layer was formed in the porous film imprinted using a porogen loading of 30 wt%. The film porosities ranged from 0 to 33.8% over the porogen loading range of 0-30 wt%
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DOI
10.1107/S0021889806047509
ISSN
0021-8898
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UCRF_Journal Papers
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