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Andy Peters
11/07/05 11:36
Read: 1009 times
Tucson, Az

#103388 - what you have done ...
Responding to: Suresh R's previous message
Suresh R said:
can you tell me how to make a solid ground plane in two layer board design.

what i have done is
" connected the bottom layer copper pour to the ground net. no copper pour in the top layer."

Do the copper pours LAST.

Connect all signals and power traces. Try to keep them all on the top layer, but you may use the bottom layer for convenience. For best signal integrity, don't run traces on the top layer parallel with any traces on the bottom layer. In fact, if at all possible, avoid running any top-layer traces over or across any bottom-layer traces -- you want the traces to be over a continuous plane.

When all signal and power traces are routed, pour the bottom-layer ground plane. Then pour a top-layer ground plane around all of the traces and components on the top layer. (Make sure to set your clearances appropriately.) The ground plane on the top layer should connect to all of the components on the top that have ground nodes (make sure to use thermal relief pads!). Finally, stitch the two ground planes together using lots of vias.

The ground track and Vcc track runs on both sides of the board

I'm not sure what you mean by this. There shouldn't be a ground "track" (meaning trace?) on either layer.


List of 16 messages in thread
two layer PCB      Suresh R      11/04/05 23:56      
   +5VDC also drives PhotoMOS relays      Suresh R      11/05/05 00:13      
   Solid ground plane is needed!      Kai Klaas      11/06/05 05:18      
      what i have done is      Suresh R      11/07/05 10:19      
         what you have done ...      Andy Peters      11/07/05 11:36      
            Thermal relief's      Suresh R      11/08/05 03:09      
               You need a solid ground plane      Kai Klaas      11/08/05 08:03      
                  I want the best money can buy, but do no      Erik Malund      11/08/05 08:22      
                  Thermal relief in PCB's      Suresh R      11/08/05 11:24      
                     An illustration...      Kai Klaas      11/09/05 06:26      
                        went through the design but      Suresh R      11/10/05 04:46      
                           Thermal reliefs were demonstrated      Kai Klaas      11/10/05 05:30      
                           who are you posting to????      Erik Malund      11/10/05 06:14      
               thermal reliefs only ease soldering        Sasha Jevtic      11/08/05 12:37      
                  Resistance calculation for thrmal relief      Suresh R      11/08/05 22:35      
                     you better read .....        Abhishek Singh      11/10/05 05:56      

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