On Wed, Aug 30, 2017 at 7:18 AM, Richard Wilbur richard.wilbur@gmail.com wrote:
actually it just occurred to me that i could move the HXT?P vias over by another.... 10-15 mil or so, which would mean that the corresponding HXT?N traces would be able to go straight (directly south) instead of SW, S then SE.
Which is an elegant way of doing some intra-pair (within the pair) skew compensation--by avoiding some the sources of skew to begin with. Sounds like a fine idea!
mrhm grumble i have to redo those nice length-matchings.... agaaainn aaargh :)
or... i _could_ just put in a copper-to-diffpair Design Rule of "15 mil" clearance - that would keep the flood-fill away.
I think this is the most maintainable solution.
ok attached is the result of doing that. layer 1 just after the SoC the "surround" on the vias is well over 15mil away, on *all* layers... including GND. all VIAs are now avoided by the specified 15mil.
... seems a bit much, to me....
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... i'm getting used to it....
"Practice makes easy."
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marked in this image, i was planning to remove the GND traces that are marked with red dots.... but only after all's done because currently they help keep the inter-pair separation.
does that sound sensible?
Eminently so!
awesome.
