Intracranial pressure monitoring has important clinical value in the diagnosis and treatment of Neurosurgery, but the existing sensors have problems such as a lack of miniaturization and poor long-term stability. In this paper, a micro piezoresistive pressure-sensitive chip based on MEMS technology is proposed. Through the optimal design of the sensitive film structure, the intracranial pressure monitoring sensor with high stability and high overload resistance is realized. Through theoretical modeling and finite element simulation, the collaborative optimization model of film thickness and side length is established to improve the structural linearity. The sensitive film was formed by the combination of SOI material and a deep silicon etching process to prepare the sensor chip. The test results show that the sensitivity of the chip is up to 0.34 mV/kPa in the working environment, and the hysteresis, repeatability and nonlinear error are better than 0.13% FS, 0.011% FS and 0.19% FS respectively. This study provides an expandable technical path for micro biomedical sensors.
LIXin, LIANGTing, ZHAODan, et al. Design and preparation of a high temperature SOI piezoresistive pressure sensor[J]. Micronanoelectronic Technology, 2018, 55(6): 408-414. (in Chinese)
[3]
PONGSAKORNSATHIENN, GARDIA, LIM Y, et al. Wearable cardiorespiratory sensors for aerospace applications[J]. Sensors, 2022, 22(13): 4673.
QIHongwu, ZENGWeijun, RENYinpeng, et al. Research progress of invasive intracranial pressure monitoring technology[J]. Chinese Journal of Minimally Invasive Neurosurgery, 2020, 25(6): 281-284. (in Chinese)
ZHOUXingjian, LEICheng, LIANGTing, et al. Dynamic performance research of high frequency response MEMS pressure sensor[J]. Ship Electronic Engineering, 2023, 43(4): 167-171. (in Chinese)
[14]
SUR, WENX, WANGJ, et al. Research progress of intelligent wearable flexible pressure sensor[J]. Jornal of Materials Engineering, 2024, 52(8): 98-108.
MAY, LEIC, LIANGT, et al. Design and fabrication of a tiny micro-pressure sensor with improved linearity and sensitivity[J]. Physical Review Research, 2023, 98(5): 055018.
YANGJiaoyan, LIANGTing, LIXin, et al. High temperature pressure sensor based on SOI island film structure[J]. Micronanoelectronic Technology, 2018, 55(9): 635-641. (in Chinese)
[20]
ZHANGX, WEBSTERJ G, ISKANDARB J, et al. Chronic intracranial pressure sensor to assist with control of hydrocephalus[J]. IEEE Sensors Journal, 2019, 19(5): 1969-1978.
WANGYufeng, ZHAOYanchen, LEICheng, et al. Study on influence of fixed support structure on piezoresistive pressure sensor output[J]. Instrument Technique and Sensor, 2023(10): 7-14. (in Chinese)
JIPengfei, ZHAOYanchen, LEICheng, et al. Output characteristics influence of silicon piezoresistor etching morphology on high temperature pressure sensors[J]. Instrument Technique and Sensor, 2023(12): 10-15. (in Chinese)
[25]
MEENAK V, SANKARA R. Biomedical catheters with integrated miniature piezoresistive pressure sensors: a review[J]. IEEE Sensors Journal, 2021, 21(9): 10241-10290.
[26]
郝小艺. 高性能MEMS压阻式压力传感器设计、 制备与测试[D]. 南京: 东南大学, 2023.
[27]
PENGS, ZHUS. Optimization of sensitivity of MEMS micro-pressure sensor[J]. Optics and Precision Engineering, 2022, 30(13): 1582-1590.
[28]
SONGP, MAZ, MAJ, et al. Recent progress of miniature MEMS pressure sensors[J]. Micromachines, 2020, 11(1): 56.
[29]
郭威. 高灵敏度MEMS压阻式压力传感器的研究[D]. 成都: 电子科技大学, 2024.
[30]
HEF, FENGY, DAIJ, et al. Design for silicon piezoresistive pressure sensor chips[J]. IEEE Transactions on Components, Packaging and Manufacturing Technology, 2023, 13(7): 920-927.
WANGJing, LEICheng, LIANGTing, et al. Influence analysis of technological error of varistor[J]. Instrument Technique and Sensor, 2023(7): 8-11. (in Chinese)
LIANGTing, XUEShengfang, LEICheng, et al. Design and preparation of high frequency MEMS pressure sensor[J]. Instrument Technique and Sensor, 2021(6): 6-10. (in Chinese)
[35]
KANEKALD, JINDALS K. Investigation of MEMS piezoresistive pressure sensor with a freely supported rectangular silicon carbide diaphragm as a primary sensing element for altitudinal applications[J]. Silicon, 2023, 15(4): 1947-1959.
ZHONGChangzhi, WANGLingyun, BUZhenxiang, et al. Design and fabrication of intracranial pressure sensor based on SOI[J]. Journal of Xiamen University (Natural Science), 2023, 62(4): 517-524. (in Chinese)
SHANCunliang, LIANGTing, WANGWentao, et al. MEMS high temperature piezoresistive pressure sensor based on SOI[J]. Micronanoelectronic Technology, 2021, 58(4): 325-331. (in Chinese)
DONGZhichao, LEICheng, LIANGTing, et al. Research on leadless flip chip packaging of SOI high temperature pressure sensor[J]. Transducer and Microsystem Technologies, 2021, 40(11): 65-68. (in Chinese)
LIXin, LIANGTing, ZHAODan, et al. Design of SOI-MEMS high temperature pressure sensor based on E-type structure[J]. Instrument Technique and Sensor, 2018(5): 1-4. (in Chinese)
GONGKaixun, LIANGTing, LEICheng, et al. Research on MEMS electroplating metal masking process[J]. Transducer and Microsystem Technologies, 2022, 41(11): 27-30. (in Chinese)
LINLina, LIANGTing, ZHAODan, et al. Influence of annealing parameters on ohmic contact of p-Si and Ti/Pt/Au[J]. Chinese Journal of Sensors and Actuators, 2018, 31(10): 1499-1504. (in Chinese)
[51]
MAT, WANGY, ZHOUJ. A Si-based suspended tunnel structure with trapezoidal section by two-step etching[J]. Journal of Micromechanics and Microengineering, 2022, 32(2): 024003.
HAOYiming, LEICheng, WANGTaolong, et al. Study on the double mask process for preparation of E-type films[J]. Piezoelectrics & Acoustooptics, 2024, 46(4): 505-510. (in Chinese)
[56]
PARKJ S, KANGD H, KWAKS M, et al. Low-temperature smoothing method of scalloped DRIE trench by post-dry etching process based on SF6 plasma[J]. Micro and Nano Systems Letters, 2020, 8(1): 14.
[57]
JIAOD, NIZ, WANGJ, et al. Ultra-small pressure sensors fabricated using a scar-free microhole inter-etch and sealing (MIS) process[J]. Journal of Micromechanics and Microengineering, 2020, 30(6): 065012.