Session 19: Conductors

Photonic sintering of micron particle conductive paste
Thursday, February 15, 2018
2:25 PM - 2:45 PM

Many studies have been conducted on nano-silver ink, these materials are suitable for inkjet and aerosol jet. Nano-sized particles are suitable for photonic sintering for 3D printed electronics because they absorb the IR and NIR spectrum much more readily than common substrate materials. Other direct write methods, such as nozzle extrusion/dispensing, are also able to use materials with larger particle sizes. The interaction between these micron particle pastes and photonic sintering are unknown. If these pastes can reach 220ºC, before the substrate exceeds 90 ºC, or a significant amount of substrate material is ablated, then photonic sintering can be a viable within the direct digital manufacturing process. Conductivity measurements will be conducted on dispensed silver paste on ABS substrates, before and after photonic sintering with parameter optimization of distance between lamp and sample, number of pulses and the temperature of substrate and conductive trace.