All conductors resist the flow of current to some extent and in order to eliminate resistance to minimum, a most economical way to reduce resistance is to make conductor as efficient as possible by providing so-called ''conduit'' to channel the current flow.
Resistance also creates heat and it has to be reduced to a controllable level.
In a typical motherboard design, there are 4 layers of copper for the entire circuitry where both VCC and ground are sandwiched between solder side and component side. In the older generation motherboard when bus speed and component numbers are low, it is quite sufficient, but as the performance of today's personal computer has reached to PC133 and operating over 1GHz in CPU speed, the old method seems to be crippled by dilemma. Today's motherboard design faces challenge of providing fast speed with low noise that is detrimental to the system stability. In order to provide every critical part of circuitry within the PCB, AOpen deploys a new design concept called 'Power Bridge'. These bridges are strategically place within the motherboard design that provides both voltage and current to a targeted PCB region.