Re: [SI-LIST] : GND on the outer layers

Hans Mellberg ([email protected])
Wed, 14 Jul 1999 13:03:09 -0700 (PDT)

Yes, it reduces the radiation significantly (especially if ground plane
stitching is performed) but your manufacturing engineers won't let you
build it. Solder will capillary/flow under the solder mask and you end
up with a whole lot of problems (soler consumption, warpage, etc.).
That is why you get crosshatched planes but those may not work so well.
I prefer to use the 2nd and next to last layer for solid ground planes
and place only benign signals on the outer layers. That way you get
best of both worlds. Unless you have a 4-layer board!

Best Regards
Hans Mellberg
EMC Consultant
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