[Arm-netbook] HDMI High-Frequency Layout: Recommendations--Taper

[Luke Kenneth Casson Leighton]

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crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Fri, Dec 22, 2017 at 10:32 PM, Richard Wilbur
<richard.wilbur at gmail.com> wrote:
> Here's another view of the connector end with some slight revisions of
> the ground fill and keepout boundaries between the ESD and connector
> components.
>
> Summary:
>
> 1.  I moved the East extent of the layer 3 ground fill east to the
> edge of the connector pads.

 ok remember that ground flood-fill is the entire layer 3, i'm not
creating a *specific* area for ground "fill", it's done by default
according to the (specified) design rules.  with the new "conditional"
rule added, layer 3 now looks like this:
 http://hands.com/~lkcl/eoma/a20/275_hdmi/layer3.jpg

 so there's a few things i need to sort out, which i'll get to: main
reason for showing that image is: the clearance to the VIAs has also
extended to 15mil now.  i believe it's not so much the vias though as
the tracks connected *to* the vias.  if there has to be a 5 mil
clearance to those i can... maybe sort something out :)

> 2.  The layer 2 ground keepout remains open under the high-frequency
> pads of both the ESD component and the connector.

 ok cool.

> 3.  The layer 2,3,4 ground keepout West edge moved with the East edge
> of the layer 3 ground fill to the edge of the connector pads.

 oh wait... i haven't put in a keepout *at all* on layers 3 and 4.
you think it would be best to punch the hole *right* down so that it's
only layer 5 providing a GND plane for both sides?  it makes sense, i
just want to confirm.

> Thanks for the images and video, Luke.

 ehn the vides are fun :)

l.