This paper presents drop-on-demand inkjet printing of SU-8 on functionalized surfaces for direct printing of computer controlled polymer patterns. The high viscosity of SU-8 required an in-depth investigation of the print parameters such as pulse amplitude, pulse length and temperature in the piezo-actuated nozzle. The results show that the optimal drop velocity to obtain a stable printing is ~2 ms-1 which corresponds to pulse amplitude and length of 220 V and 70-80 μs, respectively. The diameter of the SU-8 drop was reduced from 117 μm on non-treated silicon to 58 μm on a surface terminated by a silane-based self-assembled monolayer.
Danick Briand, Nicolas Francis Fumeaux
Jakob Heier, René Uwe Schneider, Sina Abdolhosseinzadeh, Mohammad Jafarpour
Yves Perriard, Yoan René Cyrille Civet, Thomas Guillaume Martinez, Stefania Maria Aliki Konstantinidi, Armando Matthieu Walter, Simon Holzer