Temperature dependence of the dielectric properties of polymer composite based RF capacitors Article

Hwang, JH, Markondeya Raj, P, Abothu, IR et al. (2008). Temperature dependence of the dielectric properties of polymer composite based RF capacitors . MICROELECTRONIC ENGINEERING, 85(3), 553-558. 10.1016/j.mee.2007.10.004

cited authors

  • Hwang, JH; Markondeya Raj, P; Abothu, IR; Yoon, C; Iyer, M; Jung, HM; Hong, JK; Tummala, R

authors

abstract

  • The temperature dependence of the dielectric properties of high Q polymer-based composites was discussed in terms of microstructural differences with various filler contents. Liquid coatable high Q polymer-based composites with 3-4× improvement in dielectric constant and precisely controlled temperature coefficient of capacitance (TCC) were developed with Ta2O5 as the inorganic filler. The base polymer showed a negative TCC of -250 ppm/°C from room temperature to 125 °C. Measurement of TCC with samples containing Ta2O5 greater than 30 vol.% showed TCC of ±50 ppm/°C with moderate capacitance density, whereas no detectable improvement in the TCC was observed in samples having 20 vol.% Ta2O5. The electron micrographs of this low filler content sample gave a clear indication of clustering, i.e. particle agglomeration. The homogeneity of the particle distribution was more pronounced in the sample with 40 vol.% Ta2O5. © 2007 Elsevier B.V. All rights reserved.

publication date

  • March 1, 2008

published in

Digital Object Identifier (DOI)

start page

  • 553

end page

  • 558

volume

  • 85

issue

  • 3