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Reliable fabrication method of transferable micron scale metal pattern for poly(dimethylsiloxane) metallization
Kwan Seop Lim1, Woo-Jin Chang, Yoon-Mo Koo
1Birck Nanotechnology Center and Bindley Bioscience Center, School of Electrical and Computer Engineering, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, USA.
Lab on a Chip
|March 31, 2006
Summary
We developed a reliable method to create tiny metal patterns on poly(dimethylsiloxane) (PDMS) using a pattern transfer technique. This process enables precise 2-micrometer features for advanced biosensors and flexible electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Microfabrication
Background:
- Poly(dimethylsiloxane) (PDMS) is a versatile elastomer for flexible electronics.
- Patterning conductive materials on flexible substrates is crucial for device integration.
Purpose of the Study:
- To develop a reliable method for fabricating micron-scale metal patterns on PDMS.
- To enable the use of PDMS in advanced applications like biosensors and flexible electronics.
Main Methods:
- A multi-layer metal stack (Au-Ti-Au) was deposited on a silicon wafer.
- A pattern transfer process involving serial and selective etching was employed.
- The metal patterns were transferred onto a PDMS substrate.
Main Results:
- Reliable fabrication of micron-scale metal patterns on PDMS was achieved.
- Features as small as 2 micrometers were successfully transferred.
- The transferred patterns demonstrated suitability for interconnects and electrodes.
Conclusions:
- The developed pattern transfer method is effective for creating high-resolution metal patterns on PDMS.
- This technique supports the integration of PDMS in flexible electronic devices and biosensors.
- The process offers a reliable route for fabricating microscale features on elastomeric substrates.
