Fabrication of diamond MISFET with micron-sized gate length on boron-doped (111) surface

Takeyasu Saito*, Kyung Ho Park, Kazuyuki Hirama, Hitoshi Umezawa, Mitsuya Satoh, Hiroshi Kawarada, Hideyo Okushi


研究成果: Conference article査読

11 被引用数 (Scopus)


A hydrogenated surface conductive layer of B-doped diamond on (111) was employed to fabricate a metal insulator semiconductor field effect transistor (MISFET) using a CaF2 and Cu stacked gate. The carrier mobility and concentration of the hydrogenated surface on (111) before FET processing were 35 cm2/V s and 1013/cm2, respectively, when bulk carrier concentration and film thickness of the B-doped underlaying diamond was 3 × 1015/cm3 and 1.5 μm, respectively. The DC characteristics of the gate with 1.1 μm length and 50 μm width showed that the maximum measured drain current was 240 mA/mm at - 3.0 V gate voltage, and the maximum transconductance (gm) was 70 mS/mm. The cut-off frequency of 4 GHz was obtained, which is one of the best values for the RF characteristics of a diamond homoepitaxial (111) MISFET.

ジャーナルDiamond and Related Materials
出版ステータスPublished - 2005 11月
イベントProceedings of the 10th International Conference on New Diamond Science and Technology (ICNDST-10) ICNDST-10 Special Issue -
継続期間: 2005 5月 112005 5月 14

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 化学 (全般)
  • 機械工学
  • 材料化学
  • 電子工学および電気工学


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