2007-02-02 11:28:34 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Conductive vias are created by electroless plating process. This means no electrodes and electricity are used. Once all holes (both component and vias) are drilled, the pcb is then except for the holes. Then they are dipped into a super saturated copper depositing solution for hour or two. All exposed part of the pcb precipitates and deposits thin film of copper (inner walls of the holes). Unless you are making them in quantities, NRE cost is not justifiable for few boards. Unless you have the proper equipment (photo masking) and chemicals (you may find a supplier on the web) for more than one time use, it's cheaper in the long run to have a PCB manufacturer to make you prototype quantities. Some small time operations are fairly inexpensive. If you are building a prototype, you might consider spot weld wiring. You just spot weld a wire from a pad on side A and the destination pad on side B.
2007-02-02 12:51:26 · answer #1 · answered by lightpulse 4 · 0⤊ 0⤋
If you don't have the ability to plate in the hole you could use a copper eyelet that makes contact on both sided. A small rivet and washers could also be used.
2007-02-02 21:05:58 · answer #2 · answered by KB 2 · 0⤊ 0⤋
You can insert a small wire and solder both sides before adding components.
2007-02-02 19:48:56 · answer #3 · answered by rscanner 6 · 1⤊ 0⤋