Numerical simulation of the piezoresistive effect of βga2O3in the <010> direction

Naoki Takahashi, Takaya Sugiura, Ryohei Sakota, Nobuhiko Nakano

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


β-Ga2O3 has a high potential for power device applications because of a high Baliga's figure and the availability of large-scale wafers. However, the piezoresistive effect of β-Ga2O3 has not been investigated in detail, and its piezoresistive coefficient has not been reported. This study evaluates the piezoresistive coefficient of β-Ga2O3 in the <010> direction using a mechanical stress simulator and a device simulator, which includes our piezoresistive effect model. In this study, the piezoresistive effect model and simulation method are applied to β-Ga2O3 for the first time. The piezoresistor model of β-Ga2O3 is simulated to evaluate the piezoresistive coefficient of β-Ga2O3. The experimentally obtained gauge factor with and without the contact effect is -5.8 and -3.6, respectively. The piezoresistive coefficient with and without the contact effect is -2.0 × 10-11 Pa-1 and -1.2 × 10-11 Pa-1, respectively. The piezoresistive coefficient is used to evaluate the piezoresistive effect at 1000 °C through thermal analysis.

Original languageEnglish
Article numberSCCL05
JournalJapanese journal of applied physics
Issue numberSC
Publication statusPublished - 2021 Jun

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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