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非侵入式无线无源MEMS眼压传感器

王军波 何超超 陈德勇 陈健 魏秋旭

王军波, 何超超, 陈德勇, 陈健, 魏秋旭. 非侵入式无线无源MEMS眼压传感器[J]. 电子与信息学报, 2018, 40(11): 2787-2794. doi: 10.11999/JEIT180045
引用本文: 王军波, 何超超, 陈德勇, 陈健, 魏秋旭. 非侵入式无线无源MEMS眼压传感器[J]. 电子与信息学报, 2018, 40(11): 2787-2794. doi: 10.11999/JEIT180045
Junbo WANG, Chaochao HE, Deyong CHEN, Jian CHEN, Qiuxu WEI. Non-invasive Wireless and Passive MEMS Intraocular Pressure Sensor[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2787-2794. doi: 10.11999/JEIT180045
Citation: Junbo WANG, Chaochao HE, Deyong CHEN, Jian CHEN, Qiuxu WEI. Non-invasive Wireless and Passive MEMS Intraocular Pressure Sensor[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2787-2794. doi: 10.11999/JEIT180045

非侵入式无线无源MEMS眼压传感器

doi: 10.11999/JEIT180045
基金项目: 国家自然科学基金(61372054),北京市自然科学基金(4152056)
详细信息
    作者简介:

    王军波:男,1973年生,博士,研究员,研究方向为传感器技术、MEMS技术与封装

    何超超:男,1993年生,硕士生,研究方向为无线无源压力传感器及检测系统

    陈德勇:男,1967年生,博士,研究员,研究方向为MEMS微传感器与微系统

    陈健:男,1982年生,博士,副研究员,研究方向为生物传感技术

    魏秋旭:男,1991年生,博士生,研究方向为无线无源压力传感器及检测系统

    通讯作者:

    王军波  jbwang@mail.ie.ac.cn

  • 中图分类号: TP212

Non-invasive Wireless and Passive MEMS Intraocular Pressure Sensor

Funds: The National Natural Science Foundation of China (61372054), The Beijing Municipal Natural Science Foundation (4152056)
  • 摘要: 连续监测眼压对于辅助诊断与治疗青光眼疾病具有重要作用,现有的眼压传感器存在相对灵敏度较低、中心谐振频率较高、制作工艺难度大等问题。为了解决上述问题,该文提出一种基于MEMS的非侵入式无线无源型眼压传感器。该传感器为5层堆叠结构,采用Parylene作为柔性衬底层、铜作为电极层、PDMS作为介电层,其中电极层和介电层构成两个电感和两个电容,形成C-L-C-L串联谐振电路。通过MEMS平面工艺和热塑形方法制作成能够与眼球紧密贴合的曲面形状,这种设计方案能有效地解决传感器的制作工艺难度大等问题。实验结果表明:该眼压传感器的中心谐振频率降低到了40 MHz,相对灵敏度达到1028.57 ppm/kPa,能够分辨出最小50 Pa(0.375 mmHg)的眼压值变化,为实现长期、连续性地监测眼压提供了技术支持。
  • 图  1  眼压检测系统

    图  2  传感器的单面芯片俯视图

    图  3  传感器的横截面及等效电路模型

    图  4  传感器的中间层为不同结构时的仿真模型

    图  5  工艺流程图

    图  6  种子层刻蚀工艺效果对比

    图  7  PDMS刻蚀工艺图

    图  8  传感器塑形后实物图

    图  9  实验装置示意图

    图  10  眼压传感器的实验测试曲线

    表  1  传感器的中心谐振频率相对变化与芯片间距的关系

    芯片初始间距
    (μm)
    中心频率降低(%)
    (理论值)
    中心频率降低(%)
    (仿真值)
    误差(%)
    20 29.29 29.14 0.51
    30 13.40 13.31 0.68
    40 0 0 0
    下载: 导出CSV

    表  2  传感器灵敏度提高与PDMS结构关系

    PDMS结
    构类型
    相对灵敏度
    (ppm)
    相对灵敏
    度倍数
    PDMS
    填充率
    填充率倒数
    全填满型 70.62 1.00 1.00 1.00
    圆环型 311.30 4.41 0.27 3.72
    圆柱阵列型 1160.11 16.43 0.09 11.74
    全空腔型 3064.18 43.39 NAN NAN
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-01-11
  • 修回日期:  2018-05-15
  • 网络出版日期:  2018-05-30
  • 刊出日期:  2018-11-01

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