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Double Sided PCB Pads

Former Member

Hi all,

 

I'm currently routing a PCB using Eagle of course and I want to know if it is possible to create double sided pads i.e. top and bottom layer (1 and 16). If it is possible, how do I do it?!!

 

The need for double sided pads is that I'm working with very limited space, my board is 30mm x 16mm and the board will connect to another board by these pads sticking through

Like that is you get me!   _   __   __

                                               |_|   |_|

Since I have some through hole components I need to connect some of them to the input and output connectors on the bottom side but of course the schematic only lets me route to the top side and if won't let me name two pads the same in the library package editor

 

Any help is greatly appreciated!

 

Rich Long

Parents
  • 0

    Am 11.01.2012 11:34, schrieb Richard Long:

    I'm currently routing a PCB using Eagle of course and I want to know if it is possible to create double sided pads i.e. top and bottom layer (1 and 16). If it is possible, how do I do it?!!

     

    In EAGLE, EVERY pad goes through ALL routing layers, including 1 and 16.

    You don't have to do anything.

     

    but of course the schematic only lets me route to the top side

     

    I don't understand what you mean by that or the rest of your e-mail. The

    schematics have nothing to do with routing, and they also have NEITHER a

    top NOR a bottom side...

     

    If you route the BOARD, you can just switch the layer while routing.

     

    Andreas Weidner

     

Reply
  • 0

    Am 11.01.2012 11:34, schrieb Richard Long:

    I'm currently routing a PCB using Eagle of course and I want to know if it is possible to create double sided pads i.e. top and bottom layer (1 and 16). If it is possible, how do I do it?!!

     

    In EAGLE, EVERY pad goes through ALL routing layers, including 1 and 16.

    You don't have to do anything.

     

    but of course the schematic only lets me route to the top side

     

    I don't understand what you mean by that or the rest of your e-mail. The

    schematics have nothing to do with routing, and they also have NEITHER a

    top NOR a bottom side...

     

    If you route the BOARD, you can just switch the layer while routing.

     

    Andreas Weidner

     

Children
  • 0 in reply to Former Member

    Hi Andreas,

     

    Appologise I haven't explained myself correctly.

     

    I have created a component in a custom library and have used a smd, not pad (I was thinking of a pad as a via) and you can only place the smd on either the top or bottom layer hence the PCB layout programme shows that the unrouted trace is only on the top or bottom.

    I need a way of combinning them to the same signal so that I can route to either the top or bottom without the programme giving me an error

     

    Although I am only routing to one side I need both layers as the board will be mounted onto another board and both pads soldered to anchor it on.

     

    Sorry for the confusing previous post

     

    Rich Long

  • 0 in reply to Former Member

    Richard Long wrote on Thu, 12 January 2012 04:14

    you can only place the smd on either the top or bottom layer

     

    Right, which is how it should be.  SMD are surface mount devices.  They

    inherently connect to the board on one surface only.

     

    If you want two SMD pads connected, whether next to each other or on

    opposite sides of the board, you have to make that connection.  If this is

    somehow part of a device with the copper on the other side of the board

    being a integral part of the device, you can define all this copper, vias,

    and other layers as needed, but be prepared for a lot of DRC error.

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • 0 in reply to Former Member

    I've sorted it now, I just downloaded the new version of Eagle and one of the new features is being able to put multiple pads on one schematic signal in the library editor!

     

    Problem solved!