Cleanroom-Free Toolkit for Patterning Submicron-Resolution Bioelectronics on Flexibles.

Area of Science:

• Materials Science
• Bioelectronics Engineering
• Additive Manufacturing

Background:

• Traditional lithography faces challenges in fabricating flexible bioelectronics due to solvent sensitivity and substrate incompatibility.
• Existing methods are often costly, not environmentally friendly, and difficult to scale for commercial applications.

Purpose of the Study:

• To introduce a simplified, cleanroom-free toolkit as an alternative to lithography for flexible bioelectronics fabrication.
• To demonstrate submicron resolution patterning on diverse flexible substrates.
• To enable cost-effective, scalable, and environmentally friendly production of bioelectronic devices.

Main Methods:

• Integration of two-photon laser writing mask, mask transfer, and multi-layer/material patterning.
• Utilizing a cleanroom-free approach for simplified fabrication.
• Demonstrating batch-to-batch processing for scalable production.

Main Results:

• Achieved submicron resolution for intricate bioelectronic patterns on flexible substrates.
• Successfully patterned various functional and encapsulation biomaterials, including elastomers, parylene-C, polymer sheets, skin, fabric, and plant leaves.
• Fabricated diverse prototypes of wearable and implantable bioelectronics with excellent performance.

Conclusions:

• The proposed toolkit offers a viable, scalable, and cost-effective alternative to lithography for flexible bioelectronics.
• The technique's versatility allows for patterning on a wide range of unconventional substrates.
• This advancement facilitates the development of next-generation wearable and implantable bioelectronic devices.