Ultra low impedance route

[fala]

Hello board, it seems that nobody has answered my previous post so let me put a new question for my problem but in much simpler way. I want to establish a very low impedance path between two different boards( the track length in total is about 20Cm. I measured DC resistance of tracks on my boards and I found surprisingly it is quite high about 5mOhm/Cm for 50 mil tracks( I tried to consider probe resistance for better accuracy) and an edge connector connection gave me about (20-50mOhm) deponding on edge connector type resistance! even solid planes had about 500uOhm/Cm resistance. I want total 300uOhm resistance for a track of 20Cm. Is there any solution?
Thanks a lot.

 

[rikie_rizza]

Change the type of PCB that you use. If its impossible, gold plate the PCB. If its still not possible...? I don't know what else. Why do you need such low impedance anyway? GHz data line?