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discussion on routing 4 layers

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hsn93:
hello, i found this useful and wanted to share few links to the post in case anyone in the future read it:
Tip #10:
http://www.hottconsultants.com/tips.html



--- Quote ---what happen when you make (1010) and then after routing all traces you just put a solid Gnd polygon on all layers? that will make the copper distribution?
--- End quote ---

--- Quote ---The main reason I don't like polygons on signal layers, is it's a right pain to stitch around two layers of routing plus components.  Polygons can do more harm than good if not stitched: the random resonant stubs can radiate EMI or affect signal quality (for precision applications).
--- End quote ---
i've also find these very useful:
http://www.icd.com.au/articles/Copper_Ground_Pours_AN2010_4.pdf
https://www.edaboard.com/showthread.php?194624-copper-pour-on-signal-layers
(so when use ground in all layers = must stitch planes = for this design it doesnt matter anyway.)



thank you all, i know its not high speed design circuit and it doesn't matter a lot for this circuit I've shown, but i know sooner or later i will have to understand all of this because i need to design in noisy environment and i feel its good to investigate this area from now.



--- Quote ---That board you showed looks nothing special signal integrity wise (nice tidy layout BTW), so any configuration will work. Just go for the normal sig/power/gnd/sig stackup.
--- End quote ---

thank you dave  :-+

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