High-Density Parchment Paper Papertronics With Laser-Carved Hydrophilic Channels

Researchers developed a high-resolution papertronic fabrication method using hydrophobic parchment paper as a substrate combined with a 50W CO2 laser to etch hydrophilic channels into the silicone coating. This approach achieves ~250 µm line widths and 300 µm spacing, significantly better than wax-based alternatives. PEDOT:PSS mixed with DMSO serves as the conductive ink, enabling printed resistors and capacitors (using interlocking finger structures with PVA gel electrolyte) to form functional RC filters. The circuits are biodegradable in soil, with only the silicone coating remaining inert; PDMS encapsulation is available for applications requiring durability.

Source: https://hackaday.com/2026/08/08/high-density-parchment-paper-papertronics-with-laser-carved-hydrophilic-channels. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.