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SMD Pad and tstop layer

Former Member

I am in the library editor creating a new package (footprint).  I am

using the SMD Pad tool and have no problem placing pads.  What I do have

a problem with is that the tstop layer is larger than than the pad.  Why

is this?  How can I make it the same size as the pad?  I am trying to

manually edit the layer and rectangle but it doesn't seem to be working.

 

Thank you,

Tim

 

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  • It is best to not top post and cut unused context.

    Timothy D. Swieter wrote:

    Thank you for the response and your experience Paul.

     

    I have my library footprint open, but I don't see how to modify the DRC

    setting you are referencing.  If I go to 'Option', then 'Set...' a

    dialog opens that has a title of 'Settings' and there is a 'DRC' tab,

    but the only thing on this tab is 'Fill style of error polygons' and

    With the board edit window open the DRC and look at the mask tab.

     

    nothing else.  I would like to turn off the auto tstop or at least be

    able to adjust how much larger the tstop is.  Can you help me further

    and let me know where I should be looking to adjust the setting?

     

    With the lib edit window use change stop (on/off) to change the stop

    mask. When off you will have to add to the top and bottom stop layer a

    polygon, rectangle or wires to make the shape you need.

    On the last couple boards I made I didn't check the tstop, then when I

    got the board back one or two pads on each SMT I used would be larger. 

    The larger pad as the ground pad because I did a ground fill without

    thermals and with the larger tstop this made the pad larger.  Hand

    soldering was more difficult on my fine pitch SMT because of this and I

    would like to fix it.

     

    I use http://www.freedfm.com and a Gerber viewer to verify the artwork.

     

    Paul R.

     

Reply

  • It is best to not top post and cut unused context.

    Timothy D. Swieter wrote:

    Thank you for the response and your experience Paul.

     

    I have my library footprint open, but I don't see how to modify the DRC

    setting you are referencing.  If I go to 'Option', then 'Set...' a

    dialog opens that has a title of 'Settings' and there is a 'DRC' tab,

    but the only thing on this tab is 'Fill style of error polygons' and

    With the board edit window open the DRC and look at the mask tab.

     

    nothing else.  I would like to turn off the auto tstop or at least be

    able to adjust how much larger the tstop is.  Can you help me further

    and let me know where I should be looking to adjust the setting?

     

    With the lib edit window use change stop (on/off) to change the stop

    mask. When off you will have to add to the top and bottom stop layer a

    polygon, rectangle or wires to make the shape you need.

    On the last couple boards I made I didn't check the tstop, then when I

    got the board back one or two pads on each SMT I used would be larger. 

    The larger pad as the ground pad because I did a ground fill without

    thermals and with the larger tstop this made the pad larger.  Hand

    soldering was more difficult on my fine pitch SMT because of this and I

    would like to fix it.

     

    I use http://www.freedfm.com and a Gerber viewer to verify the artwork.

     

    Paul R.

     

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