期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 89, 期 1-2, 页码 152-158出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0924-4247(00)00541-0
关键词
micro electro mechanical systems; nano-fluidic applications; micromachined thermal sensors
This paper presents micromachined thermal sensors for measuring liquid flow rates in the nanoliter-per-minute range. The sensors use a boron-doped polysilicon thin-film heater that is embedded in the silicon nitride wall of a microchannel. The boron doping is chosen to increase the heater's temperature coefficient of resistance within tolerable noise limits, and the microchannel is suspended from the substrate to improve thermal isolation. The sensors have demonstrated a flow rate resolution of 0.4 nl/min, as well as the capability for detecting micro bubbles in the liquid. Heat transfer simulation has also been performed to explain the sensor operation and yielded excellent agreement with experimental data. (C) 2001 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据