I Introduction
The advance on adopting electrical controls is widely recognized in modern aerospace, drilling and automotive industries. Based on various sensors, the electrical approaches provide more flexible control capability than the traditional mechanical solutions, and also significantly reduce the size, weight and cost of the whole system. However, the working environments for these electronic devices are harsh, often involving high ambient temperature. For instance, in the oil drilling services industry, the Measurement While Drilling (MWD) application demands electronic devices that operate at , in order to make exploration of deeper reservoirs possible. Hence, the development of high-temperature electronic devices based on advanced process, such like Silicon-on-Insulator (SOI), becomes essential.