On Nov 26, 2004, at 1:26 AM, Tony Firshman wrote:
On Thu, 25 Nov 2004 at 21:07:54, Dave P wrote: (ref: <[EMAIL PROTECTED]>)
My only discomfort over Nasta's design is that he is extremely concernedIt is likely, surely, that the bigger PCB with fewer layers is cheaper.
about efficiency of space. Therefore, he's crammed an awful lot into a
very small 6-layer PCB. I would always be inclined to spread things out a
bit and go for fewer layers. But that's just me - spending a bit extra on
PCB to save the cost in time to shoehorn all those tracks into SUCH a
small space ;)
http://www.q-v-d.demon.co.uk/smsqe.htm
I would presume that he is using a couple of the layers for power and ground, which will help a lot with the higher speeds and tend to keep noise off the signals. Also, in manufacturing these days I believe in higher quantities that 6 layers isn't much more (may actually be less than) than 4 layers.
jim
_______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
