Bulletin of Materials Science

, Volume 29, Issue 2, pp 181–185 | Cite as

Dielectric measurements on PWB materials at microwave frequencies

  • A. Tanwar
  • K. K. Gupta
  • P. J. Singh
  • Y. K. Vijay
Electrical Properties


In quest of finding new substrate for printed wiring board (PWB) having low dielectric constant, we have made PSF/PMMA blends and evaluated the dielectric parameters at 8.92 GHz frequency and at 35°C temperature. Incorporating PMMA in PSF matrix results in reduced dielectric constant than that of pure PSF. The dielectric parameters of pure PMMA and PSF films of different thicknesses have also been obtained at microwave frequencies. We have used dielectric data at microwave frequencies as a tool to evaluate optical constants, absorption index ‘K’ and refractive index ‘n’. The blends of PSF/PMMA may be used as base materials for PWBs.


Dielectric constant PWB dielectric loss absorption index 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Araktingi I and Hoard R 1999Proceedings of IPC Expo. ’99 (Long Beach, California: Bannockburn, IL: IPC Org.)Google Scholar
  2. Bahl I and Ely K 1990Microwave J. 33 131Google Scholar
  3. Baker-Jarvis J and Janezic M D 1994Proc. microwave processing of materials IV (Pittsburgh, USA: Mater. Res. Soc.)347 p. 215Google Scholar
  4. Baker-Jarvis J, Janezic M D, Grosvenor J H and Geyer R G 1994 Natl. Inst. Stand. Technol. NIST Tech. Note 1355Google Scholar
  5. Baker-Jarvis J, Janezic M D, Riddle B and Holloway C L 2001 Natl. Inst. Stand. Technol. NIST Tech. Note 1520Google Scholar
  6. Bur A J 1985Polymer 26 963CrossRefGoogle Scholar
  7. Callaghan T A and Paul D R 1994J. Polym. Sci. Part B: Polym. Phys. 32 1847CrossRefGoogle Scholar
  8. Chang C S 1993IEEE Comp. Hybrids Mfg. Technol. 16 909CrossRefGoogle Scholar
  9. Chang C S and Agrawal A P 1994IEEE Comp. Hybrids Mfg. Technol. 17 564Google Scholar
  10. Dube D C 1984Bull. Mater. Sci. 6 1075Google Scholar
  11. Dube D C and Natarajan R 1973J. Appl. Phys. 44 4927CrossRefGoogle Scholar
  12. Eftekhari A, St. Clair A K, Stoakley D M, Kuppa S and Sing J J 1992J. Polym. Mater. Sci. Eng. 66 279Google Scholar
  13. Fayt R, Hadyiandreou P and Teyssie P 1985J. Polym. Sci. Polym. Chem. Ed. 23 337CrossRefGoogle Scholar
  14. Khare P K, Gaur M S and Srivastava A P 1993Indian J. Pure & Appl. Phys. 31 102Google Scholar
  15. Paulter N G 1998IEEE Trans. Instrum. Meas. 47 1469CrossRefGoogle Scholar
  16. Riddle B and Baker-Jarvis J 2003IEEE Trans. Microwave Theory & Technol. 51 727CrossRefGoogle Scholar
  17. Singh J J, St. Clair T L, Holt W H and Mock W 1985 NASA Tech. Memo 86431Google Scholar
  18. Vankrevelen D W and Hoftyzer P J 1976Properties of polymers (Amsterdam: Elsevier Scientific Publishing Company)Google Scholar

Copyright information

© Indian Academy of Sciences 2006

Authors and Affiliations

  • A. Tanwar
    • 1
  • K. K. Gupta
    • 1
  • P. J. Singh
    • 1
  • Y. K. Vijay
    • 1
    • 2
  1. 1.Department of PhysicsM.S.J. CollegeBharatpurIndia
  2. 2.Department of PhysicsUniversity of RajasthanJaipurIndia

Personalised recommendations