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April 2014

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Subject:
Re: Rigid Flex Plane Cross-Hatching & Impedance
From:
iTech iCollege iSrael ????? ?????????? ????? <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Sun, 13 Apr 2014 01:07:21 +0300
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text/plain
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Use Crosshatch 50%  Diagonal GND Plane, not Solid to make it flexible
The impedance may be 25% higher than solid
Shalom Shlomi Zigdon




-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of David
Baldwin
Sent: Friday, April 11, 2014 11:16 PM
To: [log in to unmask]
Subject: [DC] Rigid Flex Plane Cross-Hatching & Impedance

I have a rigid-flex design that is too difficult to bend and form.  We have
100 ohm DP's going across the flex against solid reference planes.  We want
to cross hatch the planes in the flex regions in an attempt to make it more
flexible (along with other adjustments).

1. What are the guidelines for cross-hatching the copper (50%, diagonal,
orthogonal?) 2. How badly will it affect the impedance?  Should I keep the
copper solid under the DP's?

Thanks,

Dave


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