In dynamic electrocardiogram monitoring, doctors often encounter the following situation: within 24 hours of wearing a Holter, the signal is clear and readable for the first 6 hours, but by the 12th hour, the waveform begins to show baseline drift and motion artifacts; By the 18th hour, some lead signals were no longer available for diagnosis.

The problem lies inElectrode skin interfaceUp there.

Traditional Ag/AgCl wet electrode relies on conductive gel to establish ion electron conversion pathway. However, as the wearing time prolonged, the water in the gel gradually evaporated, the impedance increased, and the signal deteriorated. More importantly, human skin undergoes stretching, twisting, and deformation during movement - with a skin extension rate of over 30% - while traditional electrodes are rigid and cannot follow skin deformation. The relative displacement between the electrode and the skin is directly converted into signal noise.

2、 What is skin stretchable flexible electrode: definition and engineering boundary

The stretchable flexible electrode on the skin surface is a bioelectric signal acquisition device that can form a conformal fit with human skin and maintain stable electrical properties under mechanical deformation conditions. It is not a simple "flexibility" of traditional electrodes - it is a comprehensive reconstruction from material selection, structural design to interface engineering.

3、 Material system: from elastomers to conductive networks

The "stretchability" ability of stretchable electrodes comes from two aspects: the elasticity of the substrate and the deformation tolerance of the conductive layer.

4、 Structural Design: How to Make Conductors Stretch Like Springs

5、 Key Performance: What Engineers Should Pay Attention to

6、 Three major application scenarios: from electrocardiogram monitoring to human-computer interaction

7、 Customization: on-demand matching from substrate to pattern

There are significant differences in the substrate, conductive material, electrode pattern, and size requirements for stretchable electrodes in different application scenarios. Based on its technological accumulation in the fields of precision processing of flexible substrates and precious metal coating, Advanced Institute Technology provides the following customized services:

8、 Conclusion

The essence of stretchable flexible electrodes on the skin is to establish a stable, low-noise, and biologically friendly signal channel between rigid electronic devices and soft biological tissues. It uses elastic substrates to match the mechanical properties of the skin, a stretchable conductive network to ensure electrical continuity under deformation, and structural design to "guide" strain from the functional layer - the three work together to answer a core engineering question:How to make electronic devices stretch and contract like skin, while also understanding the language of the body.                

From electrocardiogram monitoring to brain computer interfaces, from exercise rehabilitation to human-computer interaction - stretchable electrodes are bringing the collection of bioelectric signals from hospitals to homes, from static to dynamic, and from "sticking up" to "growing up". In this technological evolution, material selection, structural design, and precision machining processes have always been the core variables that determine the upper limit of electrode performance.