3D Printed Substrate
Printing directly onto 3D printed components is something that we have done only some minimal testing around thus far so expect this page to be updated as we (or you!) generate more experimental data.
Experiments conducted so far have only been performed onto 3D printed PLA plastic (produced on an Ultimaker 1 - although this shouldn't have any effect). The main issue with printing straight onto the 3D printed material is that most dekstop FDM printers do not often create an entirely watertight top surface. Minor amounts of surface porosity (holes or pits into the material) were created due to the minimum thickness of the extruded material. Additionally, the smoothness of the material generated the same adhesion issues experienced by FR4 & Polyimide.
These problems were circumvented by wiping a small amount of PVA wood glue over the surface and then lightly sanding it back with sandpaper. This provided a printing surface that still wasn't ideal in terms of adhesion or conductivity but definitely provided a usable substrate. Further experiments are planned for reducing the post-processing down to a minimum.
The last problem is that 3D printed materials are thermoplastics that are designed to be extruded usually around 200C - this prevents any possibility of soldering to the materials.
Where to Find
Custom parts produced on any standard desktop FDM printer.
|2/5 The lack of consistency in the sanded surface of the parts leads to a reduction in the achievable resolution for a given number of layers. If a better/more consistent method can be found, this may be able to increase drastically.|
|2/5 The resolution is poor on these parts for similar reasons as Conductivity, see above.|
|0/5 Due to the thermoplastics in a 3D print becoming soft at anywhere upward of 80C, it becomes virtually impossible to solder anything to the traces - only suitable for Z-Axis Tape or Silver conductive epoxy. Perhaps a part made through SLS or SLA technology would be able to withstand the heat much better.|
|2/5 The material itself is inherently waterproof & ductile but the surface leaves adhesion very low so the traces can often be easily rubbed off.|
|?/5 This parameter entirely depends upon the material you use & we have even made circuits with very thin sections of printed PLA that were very flexible.|
|5/5 The benefit of using a 3D printed object is that it becomes simple to make the substrate into almost any shape you want, as long as the surface you are printing onto is flat & does not collide with the print head.|
Compatible Component Attachment Methods
|Silver Conductive Epoxy|