Stephen wrote:

>Why is a 6 layer board better than a 4 layer board? 
>
>
>If this board is large qty prod. or well-defined (meaning it's been through a
>revision or is basically known circuitry) then the decision to go to 4 layers
>might be a consideration - but the 6 layer would be a better choice from the
>quality standpoint - Here's where we all talk about "the cost of quality"...

We must be careful when making assumptions. Each design has to be judged on
it's own merit. A design is not necessarily better because you used 2 more
layers. I think I know what you are getting at but it is not always true.
Are you saying that other design guidlines have been compromised in order to
make it a 4 layer board? 
If all critical circuit considerations have been taken into account , and
all accepted design practices have been followed on both the 4 and 6 layer
design how could the 6 layer be better?

How about more info?

Regards
Fred Pescitelli
Phoenix Designs
1285 Turner Rd.
Lilburn, GA   30247
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770-923-3465