Dielectric Properties of Polyimide‐Mica Hybrid Films

Zhang, Yi He; Dang, Zhi‐Min; Xin, John Haozhong; Daoud, Walid A.; Jiang, Jun; Liu, Yuyang; Fei, Bin; Li, Yuanqing; Wu, Juntao; Yang, Shuqiang; Li, Lai Feng

doi:10.1002/marc.200500310

Cited by 52 publications

(22 citation statements)

References 27 publications

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“…When the content of OREC is 1 wt%, the dielectric constant of cured BADCy/OREC composites was lower in frequency range of 10 2 −10 6 Hz as compared with pure cured BADCy (Fig. 15a), this phenomena is accordance with the results reported by Refs36 and37. As OREC content increases further, BADCy/OREC composites exhibit higher dielectric constant.…”

Section: Resultssupporting

confidence: 89%

Properties and structures of novel cyanate ester/organic rectorite nanocomposites

Yuan

Liang

et al. 2012

Polymer Engineering & Sci

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Organic rectorite (OREC) was applied to bisphenol A dicyanate ester (BADCy) resin to develop a novel BADCy/OREC system. The influence of OREC on the reactivity of BADCy was discussed. The morphologies of cured BADCy/OREC systems were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The static and dynamic mechanical properties as well as the hot water resistance of cured BADCy/OREC systems were evaluated. Results indicate that the addition of OREC can catalyze the reaction of BDACy resin. The intercalated structure and exfoliated structure of silicate platelets may be formed in the cured BADCy/ OREC composites. The suitable amount of OREC can improve the flexural strength, the impact resistance and the hot water resistance of cured BADCy. OREC can maintain the glass transition temperature (T g ) and have slight influence on the dielectric property of cured BADCy.

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Section: Resultssupporting

confidence: 89%

Properties and structures of novel cyanate ester/organic rectorite nanocomposites

Yuan

Liang

et al. 2012

Polymer Engineering & Sci

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“…[1][2][3][4][5][6] In electronic packaging, low-k dielectric materials minimize cross talk and maximize signal propagation speed in devices. Aromatic polyimide ͑PI͒ has been widely used as an interlayer dielectric in microelectronic devices, thanks to its good mechanical properties, excellent chemical and thermal stabilities, high breakdown voltage, and low dielectric constant.…”

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confidence: 99%

“…Aromatic polyimide ͑PI͒ has been widely used as an interlayer dielectric in microelectronic devices, thanks to its good mechanical properties, excellent chemical and thermal stabilities, high breakdown voltage, and low dielectric constant. [1][2][3][4][5][6][7][8] Simpson and St. Clair 3 have summarized the strategies used to lower dielectric constant in polyimides. In particular, fluorine is usually introduced into polyimide in order to further decrease the dielectric constant.…”

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confidence: 99%

Dielectric relaxation in polyimide nanofoamed films with low dielectric constant

Zhang

Huang

et al. 2008

Applied Physics Letters

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Polyimide nanofoamed films have been prepared from the polyimide precursors ͑PMDA-ODA͒ and poly͑ethylene oxide͒ ͑PEO͒ in N , N-dimethylacetamide. The dielectric properties of the films were studied over the temperature range of −150-150°C and a frequency range of 1 Hz-10 MHz. The frequency dependence of the dielectric constant for nanofoamed films with different amounts of PEO was studied. An relaxation process at below the glass transition temperature of the polyimide nanofoamed films was found. The peak value of the dielectric loss increased with increasing amount of PEO. © 2008 American Institute of Physics. ͓DOI: 10.1063/1.2840715͔In recent years, great attention has been paid to the lowk polymer and its composites as the next-generation interlayer dielectrics for multilayer interconnection in microelectronics. [1][2][3][4][5][6] In electronic packaging, low-k dielectric materials minimize cross talk and maximize signal propagation speed in devices. Aromatic polyimide ͑PI͒ has been widely used as an interlayer dielectric in microelectronic devices, thanks to its good mechanical properties, excellent chemical and thermal stabilities, high breakdown voltage, and low dielectric constant. [1][2][3][4][5][6][7][8] Simpson and St. Clair 3 have summarized the strategies used to lower dielectric constant in polyimides. In particular, fluorine is usually introduced into polyimide in order to further decrease the dielectric constant. 9 Furthermore, a high degree of free volume will offer as a low dielectric constant phase. In our recent study, silica tubes/PI composite films were investigated and the dielectric constant could be reduced to 2.9. 4 Moreover, a series of porous polyimide materials such as polyimide nanofoamed films prepared from PI and poly͑ethylene oxide͒ ͑PEO͒ have been explored. 10 One of the most suitable physical methods for the investigation of molecular mobility in low-k polymer samples under ac electrical field is the dielectric spectroscopy. This method makes it possible to obtain data on the molecular mobility of a macromolecule as a whole and of its mainchain segments, bulky side groups, etc. Dielectric losses in a polymer sample appear during thermal orientation of polar kinetic units. Although it has been reported that most of aromatic polyimide and copolyimide films exhibit relaxational processes ͑␣, ␤, and ␥ relaxation͒ in their dynamic mechanical and dielectric behaviors, 11,12 there is limited relaxation studies on polyimides. In this letter, PI-PEO nanofoamed films were prepared via in situ polymerization and thermal treatment. A low dielectric constant was achieved. The dielectric properties of these nanofoamed films over broad temperature and frequency ranges were studied and the dielectric relaxation was discussed in details.Pyromellitic dianhydride ͑PMDA͒ ͑Hangzhou Taida Ltd.͒ and oxydimethylaniline ͑ODA͒ ͑Beijing Chemical Reagent Ltd. China͒ were dehydrated prior to use. N , NDimethylacetamide ͑Beijing Yili Chemicals Reagent Co.͒ was used as received. PEO ͑Beijing Guoren Yikang Ltd...

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“…However, composites can meet the requirements that their components can not do. Therefore, the researches concern about the design of the structure and property of organic-inorganic composites are gained more and more attention [1,2] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of graphene sheets/polyimide nanocomposite films by in-situ polymerization

Shen

Zhang

et al. 2012

SPIE Proceedings

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Graphene sheets were carbon materials with high surface area, and excellent electrical properties. One of the most promising applications of those materials is in polymer nanocomposites. Their multifunctional properties may create new applications of polymer nanocomposites. In this paper, graphene sheets were prepared by oxidation-reduction method.The graphite was oxidized by potassium permanganate and sulphuric acid. The graphene oxide nanosheets, which were exfoliated from graphite oxide by ultrasound in water, were reduced by hydrazine hydrate, and the graphene nanosheets were obtained. Thereafter, the graphene sheets were dispersed in N,N-dimethylacetamide by simple sonication treatment.The graphene sheets/polyimide nanocomposites were synthesized by in situ polymerization using N,N'-dimethylformamide, graphene sheets and pyromellitic dianhydride. It was observed from transmission electron microscopy of graphene oxide sheets and graphene sheets that the very thin sheets were obtained by exfoliation of graphite. The result of FT-IR spectral analysis for graphene sheets shows the functional groups on the graphene sheets surface were almost the same as graphite, and that means the graphene sheets were complete reduced by hydrazine hydrate. A homogeneous dispersion of graphene sheets was achieved in polyimide as evidenced by scanning electron microscopy.

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Dielectric Properties of Polyimide‐Mica Hybrid Films

Cited by 52 publications

References 27 publications

Properties and structures of novel cyanate ester/organic rectorite nanocomposites

Properties and structures of novel cyanate ester/organic rectorite nanocomposites

Dielectric relaxation in polyimide nanofoamed films with low dielectric constant

Preparation of graphene sheets/polyimide nanocomposite films by in-situ polymerization

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