Thermal and source bumps utilizing carbon nanotubes for flip-chip high power amplifiers

T. Iwai, H. Shioya, D. Kondo, S. Hirose, A. Kawabata, S. Sato, M. Nihei, T. Kikkawa, K. Joshin, Y. Awano, N. Yokoyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

30 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) have been successfully developed as thermal and source bumps for flip-chip high power amplifiers (HPAs). The newly developed 15 μm long CNT bumps exhibit thermal conductivity of 1400 W/m·K. A flip-chip AlGaN/GaN HEMT HPA with a gate width of 2.4 mm utilizing CNT bumps, operating voltage of 40 V, exhibits an output power of 39 dBm at a frequency of 2.1GHz without any degradation due to heat-up. To our knowledge, this is the first report about a practical application of CNTs using their high thermal conductivity.

Original languageEnglish
Title of host publicationIEEE International Electron Devices Meeting, 2005 IEDM - Technical Digest
Pages257-260
Number of pages4
Publication statusPublished - 2005 Dec 1
Externally publishedYes
EventIEEE International Electron Devices Meeting, 2005 IEDM - Washington, DC, MD, United States
Duration: 2005 Dec 52005 Dec 7

Publication series

NameTechnical Digest - International Electron Devices Meeting, IEDM
Volume2005
ISSN (Print)0163-1918

Other

OtherIEEE International Electron Devices Meeting, 2005 IEDM
CountryUnited States
CityWashington, DC, MD
Period05/12/505/12/7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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    Iwai, T., Shioya, H., Kondo, D., Hirose, S., Kawabata, A., Sato, S., Nihei, M., Kikkawa, T., Joshin, K., Awano, Y., & Yokoyama, N. (2005). Thermal and source bumps utilizing carbon nanotubes for flip-chip high power amplifiers. In IEEE International Electron Devices Meeting, 2005 IEDM - Technical Digest (pp. 257-260). [1609322] (Technical Digest - International Electron Devices Meeting, IEDM; Vol. 2005).