SiGe heterostucture field-effect transistor with ICP mesa treatments

Chun Hsin Lee, San Lein Wu, Shoou Jinn Chang

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1 Citation (Scopus)


Experimental realization of a Si/SiGe doped-channel field-effect transistors (DCFETs) using Ar+CF4 mixed-gas inductively coupled plasma (ICP) dry-etching process is reported for the first time. Due to generating high-density plasma under low pressure, independently controlled plasma density as well as ion bombardment energy for ICP technology, a better anisotropic etching profile, together with a higher etching rate, compared to the reactive ion etching (RIE) process, can be obtained. As compared to device fabricat using wet etching mesa, the doped-channel FET using ICP mesa is shown having higher breakdown voltage with lower leakage current, higher transconductance, and larger current drivability due to the elimination of most of the parasitic current path between isolated devices. Moreover, the ICP etching rate as a function of plasma relative composition on Si and Si 0.7Ge0.3 in Ar+CF4 mixed-discharge has been investigated. A high and stable etching selectivity between Si and SiGe can be obtained by ICP technology.

Original languageEnglish
Pages (from-to)371-375
Number of pages5
JournalMaterials Science in Semiconductor Processing
Issue number1-3 SPEC. ISS.
Publication statusPublished - 2005 Feb

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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