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I am facing an error while practicing a reference design of the DLP-2232M-G board downloaded from Mentor's website.

The design engineer of this board has used 2 layer (TOP and BOTTOM ) keeping 3 to 21th layer inactive. Take a look " layer setup", in both case he assigned GND at "Assign Nets".

2_layer

After I made schematic in PADS logic and connect with PADS layout, I found that a GND trace exists in the PADS layout design.

Take a look, 2 capacitors ends are shorted, they should be "GND". In this design, no layer for "GND" has been called.

gnd

If you feel any setting is necessary in "Design rules", let me know.

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  • \$\begingroup\$ You don't always need a GND layer, if you're making a cheap board or want to keep it single sided then using traces for GND is fine in most applications \$\endgroup\$
    – user103993
    Mar 2, 2017 at 8:14
  • \$\begingroup\$ Need to be more specific on PADS design setting/ display setting, this design contains routed path on both side. gnd traces has appeared on what I am doing. \$\endgroup\$
    – Hasan
    Mar 2, 2017 at 8:32
  • \$\begingroup\$ Is there a GND net on the actual schematic? \$\endgroup\$
    – user103993
    Mar 2, 2017 at 8:47
  • \$\begingroup\$ Yes, it has. "Off-pages" are also available. \$\endgroup\$
    – Hasan
    Mar 2, 2017 at 9:03
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    \$\begingroup\$ If GND is a net on the actual schematic then when it has been pulled over for PCB layout then it will expect tracks to connect the different parts of the net, hence the yellow guide lines. I think the confusion you're making is that GND must be it's own separate layer. You can put whichever tracks you want on whichever layer you want. \$\endgroup\$
    – user103993
    Mar 2, 2017 at 9:07

2 Answers 2

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I do appreciate your instructions. Sudden tricks came in my mind, that was very common setting.

To invisible GND tracks, View>Nets> View nets dialog box will appear, select GND from the net list and add it in View list. After that, unchecked the View Details ( Trace plus the following un-routes ) option.

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  • \$\begingroup\$ If this is your solution you need to accept it. \$\endgroup\$ Jun 21, 2017 at 3:23
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There's nothing wrong with it. Just connect all the ground using bottom layer using copper pour function. Highlight it green by going into Nets function [CTRL + Shift + N]

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  • \$\begingroup\$ Yes, it might be alternative solution. Using key board things going to be more easy. \$\endgroup\$
    – Hasan
    Aug 8, 2017 at 20:38

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