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High-Q micromachined inductors for 10-to-30-GHz RFIC applications on low resistivity Si-substrate

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

The measured results for quality factor improvement and self-resonance frequency (fsr) improvement of the planar inductors implemented in 0.35-μm two-poly-four-metal (2P4M) CMOS process are presented in this paper. These inductors are fabricated on a low resistivity Si-substrate with a resistance about 33 Ω-cm. It is observed that the quality factors of planar inductors can be increased by the shunt metals from metal1 (M1) to metal4 (M4) to reduce the series resistance at low frequencies and by the CMOS compatible post-process to reduce the parasitic capacitance between the inductors and the lossy Si-substrate at high frequencies. With micromachined inductors suspended above the substrate, the measured maximum quality factor is 18.6 for a 0.16-nH micromachined inductor and the improvement of quality factor is up to 107%. This is also the first report of the high-Q measured micromachined inductors above 10-GHz on low-resistivity silicon substrate.

Original languageEnglish
Title of host publicationProceedings of the 36th European Microwave Conference, EuMC 2006
PublisherIEEE Computer Society
Pages56-59
Number of pages4
ISBN (Print)2960055160, 9782960055160
DOIs
StatePublished - 2006
Event36th European Microwave Conference, EuMC 2006 - Manchester, United Kingdom
Duration: 10 Sep 200612 Sep 2006

Publication series

NameProceedings of the 36th European Microwave Conference, EuMC 2006

Conference

Conference36th European Microwave Conference, EuMC 2006
Country/TerritoryUnited Kingdom
CityManchester
Period10/09/0612/09/06

Keywords

  • Micromachined inductors
  • Quality factor
  • Self-resonance frequency
  • Si-substrate

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