Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Adjacent routes on metal2 + wide routes on metal1 & metal3, all connected to GND can make a good all-around-screen. But of course create massive cap losses.
I wouldn't advice it. If your differential clock has good symmetry - both regarding drive strength and fan-out - crossing signals receive opposite stray signals which well cancel out. Nearby sensible inputs could be screened individually.
You can use normal shielding and co-axial shielding depending upon the critical on those diff nets.
1. Normal shielding -- side by side
Metal2 is you conductor
Add M2 both side of the conductor with 1:2:1 spacing.
2. Co axial
Adding M3 on top sides with width to cover fully the conductor signals
Adding M2 on both sides of the conductor and also drop VIA3-2 to connect M3 and VIA1 to connect M2
Adding M1 on below sides with width to cover fully the conductor signals
Here also you can maintain the 1:2:1 spacing between the shield and conductor.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.