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Soft Elastomers with Programmable Stiffness as Strain-Isolating Substrates for Stretchable Electronics.

Min Cai¹, Shuang Nie¹, Yipu Du¹

¹Department of Engineering Mechanics, Soft Matter Research Center, and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province , Zhejiang University , 310027 Hangzhou , China.

ACS Applied Materials & Interfaces

|April 3, 2019

Summary

This summary is machine-generated.

Researchers developed a soft, programmable polymer substrate for stretchable electronics. This novel strain-isolation method enhances device performance and enables over 100% stretchability, paving the way for scalable manufacturing.

Keywords:

programmable stiffness soft elastomer spatioselective ultraviolet exposure strain isolation stretchable electronics

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Area of Science:

Materials Science
Polymer Science
Electronics Engineering

Background:

Stretchable electronics require robust methods to manage mechanical strain.
Integrating stiff components onto flexible substrates poses significant performance challenges.
Current strain isolation techniques often increase fabrication complexity.

Purpose of the Study:

To develop a soft polymer substrate with programmable stiffness for effective strain isolation.
To enhance the performance and stretchability of electronic devices.
To simplify the manufacturing process for stretchable electronics.

Main Methods:

Spatioselective ultraviolet (UV) exposure to create a soft, strain-isolating polymer substrate.
Compatibility with established lithographic processes for reduced fabrication complexity.
Experimental and numerical studies to analyze substrate design, fabrication, and performance.

Main Results:

Achieved a strain-isolating substrate with programmable stiffness.
Demonstrated over 100% system stretchability.
Successfully integrated and tested a stretchable resistive temperature sensor and a photodiode array with high performance.

Conclusions:

The developed strain-isolation approach offers a simple, robust mechanism for stretchable electronics.
This method significantly improves device performance by mitigating undesirable strain.
The technique provides a scalable manufacturing route and new engineering opportunities for diverse stretchable electronic applications.