IEEJ Transactions on Sensors and Micromachines
Online ISSN : 1347-5525
Print ISSN : 1341-8939
ISSN-L : 1341-8939
Volume 141 , Issue 12
Showing 1-9 articles out of 9 articles from the selected issue
Paper
  • Kota Oikawa, Tomochika Harada
    2021 Volume 141 Issue 12 Pages 388-393
    Published: December 01, 2021
    Released: December 01, 2021
    JOURNAL RESTRICTED ACCESS

    In this paper, we design and evaluate an Octagonal-MOSFET, whose channel length is 2.42 µm, for parallel sensing and MOSFET operation using a 0.18 µm CMOS process. As the experimental results, the proposed device, whose size is much smaller than previous research using a 2.0 µm CMOS process, can perform as a circuit and magnetic field detection sensor. Thus, the proposed Octagonal-MOSFET can realize both circuit and sensor operations.

    Download PDF (1087K)
  • Ryoga Mori, Yuya Murase, Shota Ito, Yutaka Nonomura, Yoshiyuki Hata
    2021 Volume 141 Issue 12 Pages 394-401
    Published: December 01, 2021
    Released: December 01, 2021
    JOURNAL RESTRICTED ACCESS

    This paper reports on detection of raised cloths characteristics by a miniaturized warmth and force sensor. In our previous study, it was demonstrated that a warmth and force sensor discriminates block materials by a heat-flow peak in a heat-flow transitional phenomenon. In this study, heat-flow-peak characteristics of the raised cloths with different raising-part lengths were measured, and capability of discrimination of raised cloths was investigated. The experimental results showed that the heat-flow-peak value decreases with increase of the raising-part length when the raising-part length is under 12 mm to 15 mm. The raising-part lengths of the raised clothes were discriminated by the warmth and force sensor.

    Download PDF (1581K)
  • Hamza Abdelli, Takashiro Tsukamoto, Shuji Tanaka
    2021 Volume 141 Issue 12 Pages 402-408
    Published: December 01, 2021
    Released: December 01, 2021
    JOURNAL RESTRICTED ACCESS

    This paper reports a new method for frequency trimming that has a low effect on the quality factor of a multi-ring disk resonator. The method relies on altering the flexural rigidity of the resonator while preserving the thermal time constant. Perforations that have a small effect on the resonant frequency were added to the core and periphery of the rings of a multi-ring disk resonator. The perforations at the core of the rings reduce the effect of thermal dissipation. Therefore, after trimming the peripheral perforations, the resonant frequency changes according to the number of cut perforations, while the Q-factor remains slightly unaffected. Trimming is straightforward and involves just removing a small volume at the connections of the peripheral perforations at the rings.

    Using numerical analysis, it was demonstrated that by applying this method, the frequency could be trimmed as much as 18.83%, while the Q-factor change was as small as 0.27%.

    Download PDF (4300K)
  • Eiji Niwa
    2021 Volume 141 Issue 12 Pages 409-416
    Published: December 01, 2021
    Released: December 01, 2021
    JOURNAL RESTRICTED ACCESS

    A Cr-N alloy thin film shows a gauge factor of about 10 and a temperature coefficient of resistivity of about zero, which is expected as a new strain gauge material in the next generation. In this study, a transverse sensitivity of the Cr-N thin films and their force sensor application has been investigated. The author has found out that the films showed almost the same large sensitivity as their axial or longitudinal sensitivity when they were arranged in the direction perpendicular to the strain, and utilization of the large transverse sensitivity made possible high positional resolution on several types of physical sensors.

    Download PDF (754K)
 
feedback
Top