The components can be fairly easily connected together without using solder.
This technique is somewhat faster than standard etched and soldered circuit boards. But it does require some skill and attention to detail to create a reliable circuit.
This example circuit board is a simple micro controller circuit that flashes three LED's in sequence.
It is intended to be a minimal illustration of what is possible.
The short video below shows the circuit working.
Step 1: How It Works
2- Components are inserted in the board and the leads bent over. Pic2
3- The trace channels are filled with a conductive material. Pic3. For this example, I used a commercial conductive paint that is highly conductive, but you can also use conductive epoxy or make your own conductive material. See step 6.
The result is a working circuit board that is not as vibration resistant as a soldered circuit board, but can be quite useful for experimental circuits and prototypes.
Make no mistake, this requires some skill, with better conductive materials, less skill will be required.
While this is not going to replace conventional soldered circuits, anytime soon, it is the beginning of a fully automated 3d printed circuit.