Development of ultra high-sensitive and multi-axis accelerometer and magnetic sensor, and those integration on a ceramic substrate

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Manufacture methods of high-sensitive accelerometer and magnetic sensor on a ceramic substrate were developed using MEMS technology, which separately detect component of three-axis direction. A large vibration system along one-axis direction for accelerometer was successfully developed. Then, a self-powered sensor detecting inertia force using an electret and a ceramic plate of high-permittivity was successfully developed and characterized. For the development of high-sensitive magnetic sensor, it is proven that films of Co and NiMoFe deposited on a ceramic substrate have surely ferromagnetism characteristics required as a gigantic magneto-resistive (GMR) and/or Tunneling magneto-resistive (TMR) element. Finally, magnetism convergence plates for three-dimensional detection of magnetic field, which is fabricated by only MEMS technology, i.e., without manually handling procedures, was successfully developed.