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Solder mask or thru-hole mask in PADS Layout 9.5

Discussion in 'General Electronics Discussion' started by John Vogt, Apr 15, 2016.

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  1. John Vogt

    John Vogt

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    Apr 15, 2016
    I'm trying to learn PADS, having been around it for many years but not directly used it before. The last EDA package I used was PCAD in the 90's. I've laid out a 2 layer thru-hole board and want to make the top layer as solid ground plane with copper etched away from the plane only for an annulus around the thru hole pad. The thru hole pad will be plated through so it will appear on both top and bottom. I messed around with defining a CAM layer which I flooded with copper but it was solid copper and would have shorted to the through holes. I want copper relief around the thru hole plate through.

    I'm looking for PADS to generate a negative plot which will be mostly black but with dots and shapes which represent the through hole pad areas, plus some clearance (can I spec in some design rule somewhere?). When I expose the plot to make a negative mask, the film should be mostly clear with slightly oversize dots were the pad areas are. I'll also use this mask to make a solder mask by leaving exposed photoresist onthe board.

    Would appreciate some guidance.

    John
     
  2. Arouse1973

    Arouse1973 Adam

    5,164
    1,080
    Dec 18, 2013
    Hi John I have been using PADS for 15 years so you have come to the right place. What you do is setup your TOP layer to be a split mixed plane and add your net you want to use for the plane, go to set up layers for this. You then select the whole board outline and right mouse click and choose create plane area. You will have to make sure the layer view is selected as TOP at top left of the screen in your menu bar. This should place a plane outline (thin line) around the inside of the board outline. You can then go into setup design rules and choose the clearance of copper to pads, vias or anything else that you need. You then flood this by going to pour manager (Menu Tools, pour manager) and selecting the layer you want to flood and that's it.
    Adam
     
  3. John Vogt

    John Vogt

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    Apr 15, 2016
    Huge thanks Adam. I'm using ver. 9.5 so some of the keystrokes might be a bit different but you put me on the right track and things are working great. I had to click on the "Plane Area" button on the drafting toobar, then right click and choose "rectangle" to select the board area. As soon as I finished the selection, a popup asked me to specify the net association (I'd already done that in Layers but I think this allows for multiple net associations). Then I clicked on the flood button in the toolbar and it did the fill. Gradually getting the hang thanks to your help. Cornwall.....location in one of the greatest movies of all "About Time." .....John/Salt Lake City
     
  4. Arouse1973

    Arouse1973 Adam

    5,164
    1,080
    Dec 18, 2013
    Great to hear you got it working John. Cornwall is a great place to live, better than Bracknell (near London) which is where I come from. Never seen the film so might look it up.
    Thanks
    Adam
     
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