Double-Framed Thin Elastomer Devices

Area of Science:

• Materials Science
• Biomedical Engineering
• Microfabrication

Background:

• Polydimethylsiloxane (PDMS) is a key material for soft micro-nanosystems due to its biocompatibility and mechanical properties.
• Fabricating thin (<100 μm) PDMS devices is challenging due to peeling difficulties and solvent-induced swelling during microfabrication, hindering scalability and biomedical use.

Purpose of the Study:

• To develop a green, scalable, and contaminant-free manufacturing process for thin elastomer devices.
• To simplify the peeling and handling of delicate, thin elastomer substrates.
• To enable the fabrication of advanced thin elastomer devices for biomedical sensing applications.

Main Methods:

• Utilized low-adhesion carriers, adhesive Kapton frames, and micromilling-defined shadow masks.
• Incorporated adhesive-neutralizing paper frames to facilitate contaminant-free processing.
• Developed micromilled marking lines on carriers for precise mask alignment.

Main Results:

• Successfully demonstrated a fast, easy, and scalable method for producing thin elastomer devices.
• Achieved simplified peeling and handling of 50 μm-thick PDMS substrates.
• Fabricated functional epidermal sensors for measuring strain, bioimpedance, and heart rate.

Conclusions:

• The proposed approach offers a straightforward, green, and scalable solution for contaminant-free fabrication of thin elastomer devices.
• This method significantly advances the manufacturing of micro-nanosystems for diverse applications, particularly in biomedicine.
• Paves the way for broader industrial adoption of thin, flexible elastomer-based technologies.