how to improve your electronic systems

Electric field & Electromagnetic force on Printed Circuit Boards with bare tracks
Printed Circuit Boards usually made of paper and glass fiber with bare tracks all over, are largely employed for building solid state systems and they're real compact with parts indeed, that's why any electronic systems built with this method tend to have higher interference impact to all bare tracks caused by electric field, electromagnetic force which badly distorts the sound or video quality of any systems as flow of electrons occurs whenever you're turning them on.

You may also refer to the article posted at the link below:

http://en.wikipedia.org/wiki/Electromagnetic_interference

Lately, there's a new kind of PCB with aluminum base, which is a real good board which can shield up electric field and reduce certain heat of electronic system. PCB made this way is much better than any traditional PCBs of paper or synthetic glass fiber. Any systems made with this kind of board would have highly reliable performance and better output quality and it does real good for any electronic components.

Actually aluminum is a good material for shielding and thermal conductivity, you may take a look at the link below.

http://www.alufuture.org/affg/pop/propretie.htm

And also you can get to the mill below for further info in aluminum based PCB manufacturing:

http://www.standardpcb.com/