A Simple, Low-Cost Micro-Coating Method for Accuracy Improvement and Its Application in Pressure Sensors

Area of Science:

• Materials Science
• Sensor Technology
• Mechanical Engineering

Background:

• Increasing demand for high-accuracy pressure sensors across various technological applications.
• Existing methods for improving pressure sensor accuracy are often complex, expensive, and material-dependent.
• Need for a universally applicable, cost-effective post-processing solution.

Purpose of the Study:

• To propose and validate a simple, low-cost post-processing method for enhancing pressure sensor accuracy.
• To investigate the effectiveness of a micro-coating technique in mitigating environmental interference.
• To demonstrate the broad applicability of this method in industrial settings.

Main Methods:

• A micro-coating (parylene polymer) was applied to the surface of seven different pressure sensors.
• The coated sensors were tested to evaluate changes in accuracy and sensitivity.
• The underlying principle of accuracy improvement via surface cladding was analyzed.

Main Results:

• The micro-coating significantly improved pressure sensor accuracy, with an average increase of approximately 62.54%.
• Sensor sensitivity remained largely unchanged after the micro-coating application.
• The cladding effectively isolated the sensors from adverse external environmental effects.

Conclusions:

• The proposed micro-coating method offers a simple, efficient, and cost-effective approach to enhance pressure sensor accuracy.
• This technique provides a protective layer, mimicking "micro-protective clothing" for sensors.
• The method shows potential for widespread adoption in industrial automatic control systems.