Refractive index and dielectric constant of the boron and fluorine diffused polyimide

Alegaonkar, P.S.; Mandale, A.B.; Sainkar, S. R.; Bhoraskar, V.N.

doi:10.1016/s0168-583x(02)00779-6

Cited by 28 publications

(22 citation statements)

References 15 publications

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“…The polarizability of the fluorinated polyimides is decreased as the number of fluorine atoms is increased, due to the lower electronic polarizability of a C-F bond relative to that of a C-H bond that has been displaced. [22,23] The free volume concomitantly increases due to the relatively large volume of fluorine compared with hydrogen, which reduces the number of polarizable groups per unit volume.…”

Section: Polarizability and Free Volumementioning

confidence: 99%

Polymer Dielectric Materials

Ahmad¹

2012

Dielectric Material

151

144

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Section: Polarizability and Free Volumementioning

confidence: 99%

Polymer Dielectric Materials

Ahmad¹

2012

Dielectric Material

151

144

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“…This behavior could be attributed to the dependence of the polarization mechanisms. 24,25 As water has a very high dielectric constant, absorption in even small amounts can affect the dielectric constant of polyimide films. Absorbed water in the package has a critical effect on the electrical properties of polyimide films.…”

Section: Mechanical and Electrical Propertiesmentioning

confidence: 99%

Synthesis and characterization of novel polyimides derived from 2‐amino‐5‐(4‐aminophenyl)‐thiazole

Zhao

Shao

et al. 2007

J of Applied Polymer Sci

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A new kind of aromatic unsymmetrical diamine monomer containing thiazole ring, 2-amino-5-(4-aminophenyl)-thiazole (AAPT), was synthesized. A series of novel polyimides were prepared by polycondensation of AAPT with various aromatic dianhydrides by one-step polyimidation process. The synthesized polyimides had inherent viscosity values of 0.36-0.69 dL/g and were easily dissolved in highly dipolar solvents. Meanwhile, strong and flexible polyimide films were obtained, which have good thermal and thermo-oxidative stability with the glass transition temperatures (T g ) of 276.7-346.18C, the temperature at 5% weight loss of 451-4928C in nitrogen and 422-4408C in air, as well as have outstanding mechanical properties with the tensile strengths of 94-122 MPa, elongations at breakage of 5-18%. These films also had dielectric constants of 3.12-3.38 at 10 MHz.

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“…Consequently, C-F bonds have relatively stronger than other C-X bonds. Therefore, the intensity of carbon-fluorine groups is increased as a function of the treatment gas [11][12][13][14][19][20][21]. Fig.…”

Section: Thermal Conversion From Polyamic Acid To Polyimidementioning

confidence: 99%

“…Generally, the high ionization potential of fluorine and its relatively low polarizability imply very weak intermolecular interactions. This is explained by the electrons of fluorine being very tightly held and close to the nucleus [18,19]. Therefore, the electronic polarizability of the fluorinated polyimides is decreased as the number of fluorine atoms substituted for hydrogen is increased, due to the lesser electronic polarizability of a C-F bond relative to that of a C-H bond [10,21].…”

Section: Dielectric Characteristics Of Polyimide Thin Filmmentioning

confidence: 99%