Carlsbad, CA, USA
For many years technologies such as inkjet printing and fine screen printing have been successful in placing dots and lines on mostly flat topographies. However these technologies have required either low viscosity fluid inks with several properties tailored to meet the inkjet hardware operation window, and in the case of the former method, where higher viscosity fluids and pastes are used, a flat and unobstructed topography of the surface is required.
We are proposing in this study an alternate method where a hybrid jetting mode is used to dispense small dots and fine lines in which the above restraints are overcome, i.e., the low viscosity fluid requirement and the flatness of surface upon which we place the fluids. The implementation and application process for 2D and 3D packages is described, where nano hybrid jet dispensing is practiced resulting in high conductive lines of 40um to 160um in width on 80um to 200um pitch. Detailed descriptions will be shared about how traditional issues in jetting are overcome during this work.
Conductive lines with widths of less than 200um down to 45um were jetted successfully. These lines were dispensed on flat surfaces as well as in a 3D space. Highly doped fluid with conductive particles was successfully jetted.
Initially Published in the SMTA Proceedings