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http://dx.doi.org/10.5573/ieek.2013.50.6.305

High Temperature Silicon Pressure Sensor of SDB Structure  

Park, Jae-Sung (Dept. of Electronic & Information Engineering, YNC)
Choi, Deuk-Sung (Dept. of Electronic & Information Engineering, YNC)
Kim, Mi-Mok (Enter-Tech Co., Ltd.)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.6, 2013 , pp. 305-310 More about this Journal
Abstract
In this paper, the pressure sensor usable in a high temperature, using a SDB(silicon-direct-bonding) wafer of Si/$SiO_2$/Si-sub structure was provided and studied the characteristic thereof. The pressure sensor produces a piezoresistor by using a single crystal silicon as a first layer of SDB wafer, to thus provide a prominent sensitivity, and dielectrically isolates the piezoresistor from a silicon substrate by using a silicon dioxide layer as a second layer thereof, to be thus usable even under the high temperature over $120^{\circ}C$ as a limited temperature of a general silicon sensor. The measured result for a pressure sensitivity of the pressure sensor has a characteristic of high sensitivity, and its tested result for an output of the sensor further has a very prominent linearity and hysteresis characteristic.
Keywords
Pressure sensor; High temperature; Silicon; SDB(silicon-direct-bonding);
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