Related Experiment Video
Updated: Jun 19, 2025
Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
Published on: January 5, 2014
Small-size temperature/high-pressure integrated sensor via flip-chip method
Mimi Huang1,2,3,4, Xiaoyu Wu4, Libo Zhao1,2,3,5,6
1State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies, Xi'an Jiaotong University, Xi'an, 710049 China.
This study introduces a novel, compact integrated sensor for high-pressure and temperature monitoring in hydraulic systems. The new design enhances reliability and efficiency for intelligent control and fault prediction in demanding applications.
Area of Science:
- Materials Science and Engineering
- Sensor Technology
- Microelectromechanical Systems (MEMS)
Background:
- Modern hydraulic systems require compact, reliable sensors for fault prediction and intelligent control.
- Existing planar integration methods for temperature and pressure sensors face limitations in pressure range, size, and reliability.
- There is a need for advanced integrated sensors capable of high-performance operation in demanding environments.
Purpose of the Study:
- To develop a small-size, high-pressure, and temperature-integrated sensor using flip-chip technology.
- To improve sensor reliability and signal transmission efficiency through vertical arrangement and silicon vias.
- To enhance pressure measurement accuracy using temperature compensation.
Main Methods:
- Utilized flip-chip technique for vertical integration of pressure and temperature sensing units.
- Designed and simulated a square diaphragm with rounded corners for high-pressure sensing via the piezoresistive effect.
- Integrated a thin-film platinum resistor for temperature measurement and compensation.
- Fabricated the integrated chip using MEMS technology and packaged it into a compact sensor.
Main Results:
- The integrated pressure sensor demonstrated a sensitivity of 7.97 mV/MPa and low sensitivity drift (-0.19% FS) over 0-20 MPa and -40 to 120°C.
- Achieved excellent performance metrics including linearity (0.16% FS), hysteresis (0.04% FS), repeatability (0.06% FS), and accuracy (0.18% FS).
- The temperature sensor exhibited a measurement error < ±1°C with a temperature coefficient of resistance of 3142.997 ppm/°C.
Conclusions:
- The proposed flip-chip integrated sensor offers a significant advancement in size reduction and reliability for high-pressure and temperature monitoring.
- The sensor's high precision and compensation capabilities make it suitable for critical applications in automotive, industrial equipment, and oil drilling.
- This technology enables enhanced fault diagnosis and safety monitoring in high-end hydraulic systems.
