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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/6435

Title: Researches of a Novel 2D CMOS Thermal Based Accelerometer
Authors: Shen, Chih-Hsiung
Chen, Shu-Jung
Yang, Yin-Ting
Contributors: 機電系
Keywords: Accelerometer
CMOS
Inclinometer
Micro-Electro-Mechanical Systems (MEMS)
Thermopile
Date: 2007
Issue Date: 2010-11-29T07:12:20Z
Abstract: Conventionally the accelerometer behaves like a spring – mass system and its structures involve solid proof mass, which is allowed to move under acceleration conditions. In this paper, we design and fabrication a novel thermal-bubble-based micromachined accelerometer with advantages of minimum solid thermal conductance and high sensitivity successfully. The proposed accelerometer based on thermal convection creates a tiny heated air bubble hermetically sealed inside the sensor package cavity. Four thermopiles around the center heater serve as the temperature sensors to detect two-dimension motion of the chip and also are adequately applied to the technology of inclinometers, anemometers and flow meters. A new micro-link structure is also proposed to enhance the construction of accelerometer with the micro heater and two pairs of thermopiles floating over an etched cavity. The heater and the thermopiles are connected by network-like structure of micro-links, which enhance the structure and greatly reduce the solid heat flow from the heater to the hot junctions of thermopiles. The samples are fabricated by TSMC 0.35μm 2P4M CMOS process which is provided by CIC with outstanding strong structures and uniform quality. Our design is proved to be adequate for commercial batch production. We measure the output signal by inclining the sensor to evaluate the performance of this accelerometer.
Relation: International Conference on Advanced Manufacture(ICAM 2007), November 26-28, 2007
Appears in Collections:[機電工程學系] 會議論文

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