Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-25T17:45:02.913Z Has data issue: false hasContentIssue false
  • English
  • Français

Dielectric Properties of Sol - Gel Silica Glasses

Published online by Cambridge University Press:  25 February 2011

G. V. Chandrashekhar  and
M. W. Shafer
G. V. Chandrashekhar
Affiliation:
IBM Thomas J. Watson Research Center, P. O. Box 218, Yorktown Heights, New York 10598
M. W. Shafer
Affiliation:
IBM Thomas J. Watson Research Center, P. O. Box 218, Yorktown Heights, New York 10598
Get access

Abstract

Dielectric properties have been measured for a series of porous and fully densified silica glasses, prepared by the sol-gel technique starting from Si-methoxide or Si-fume. The results for the partially densified glasses do not show any preferred orientation for porosity. When fully densified (˜2.25 gms/cc) without any prior treatment of the gels, they have dielectric constants of ≥ 6.5 and loss factors of 0.002 at 1 MHz, compared to values of 3.8 and <0.001 for commercial fused silica. There is no corresponding anomaly in the d.c. resistivity. Elemental carbon present to the extent of 400–500 ppm is likely to be the main cause for this enhanced dielectric constant. Extensive cleaning of the gels prior to densification to remove this carbon were not completely successful pointing to the difficulty in preparing high purity, low dielectric constant glasses via the organic sol-gel route at least in the bulk form.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 72: Symposium G – Electronic Packaging Materials Science II , 1986 , 309
Copyright
Copyright © Materials Research Society 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Better Ceramics through Chemistry, Materials Research Society Symposia Proceedings 32, 1984. Also S. Sakka, Am. Ceram. Soc. Bull. 64 (11), 1985, 1463 and D.W. Johnson, Jr., Am. Ceram. Soc. Bull. 64 (12), 1985, 1597.Google Scholar
2. Kawaguchi, T., Hishikura, H., lura, J. and Kokubu, Y., J. Non. Cryst. Solids 63, 1984, 61.Google Scholar
3. Bonner, F. J., Kordas, G. and Kinser, D. L., J. Non. Cryst. Solids 71, 1985, 361.Google Scholar
4. Rabinovitch, E. M., Johnson, D. W. Jr., MacChesney, J. B and Vogel, E. M., J. Am. Ceram. Soc. 66 (10), 1983, 683.CrossRefGoogle Scholar
5. Dielectric Materials and Applications, ed. VonHippel, A. R., John Wiley, 1954, 311.Google Scholar
6. Andeen, C. and Schuele, D., J. Appl. Phys. 45 (3), 1974, 311.Google Scholar
7. Yajima, S., Hayashi, J., Omori, M. and Okamura, K., Nature 261, 1976, 683.Google Scholar
8. Zalar, S. M., private communication.Google Scholar