Bias-stress-induced increase in parasitic resistance of InP-based InAlAs/InGaAs HEMTs

Tetsuya Suemitsu, Yoshino K. Fukai, Hiroki Sugiyama, Kazuo Watanabe, Haruki Yokoyama

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The reliability of InP-based HEMTs is studied, focussing on how it is affected by the doped layer material and gate recess structure. Bias-and-temperature stress tests reveal that fluorine-induced donor passivation in the recess region, formed adjacent to the gate electrode, causes the source resistance (Rs) to increase at large drain bias voltages. The increase in Rs can be prevented by using InP or InAlP as the carrier supply layer material instead of InAlAs. On the other hand, the increase in the drain resistance (Rd) does not depend on the material of the carrier supply layer, which suggests that a mechanism different from that in the case of Rs should be considered. It is also found that a deep gate recess suppresses the increase in Rd after long-term stressing.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalMicroelectronics Reliability
Issue number1
Publication statusPublished - 2002 Jan
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Safety, Risk, Reliability and Quality
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering


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