Actions
Forum Thread Details
  • Replies 6 replies
  • Subscribers 177 subscribers
  • Views 1216 views
  • Users 0 members are here
Related

removing bits from tStop

autodeskguest

Hi All,

 

I am laying out a PCB that has a footprint for a module that is a PCB with

side-plated contacts.

 

Underneath the module there are a few vias and I am concerned they might

short with vias on the underside of the PCB module.

 

I thought that I coule edit tStop and remove the stop on the top layer, so

that the vias are completely covered on the top, but open on the bottom.

 

Firstly, is it safe to do this, and secondly, how do I edit the tStop layer.

When I view it, I just see hatched circles where the vias are, but I dont

seem to be able remove them.

 

All hints suggestions and ideas welcome!

 

Thanks,

Chris

 

 

 

Parents

  • Chris schrieb:

     

    I am laying out a PCB that has a footprint for a module that is a PCB with

    side-plated contacts.

     

    Underneath the module there are a few vias and I am concerned they might

    short with vias on the underside of the PCB module.

     

    I thought that I coule edit tStop and remove the stop on the top layer, so

    that the vias are completely covered on the top, but open on the bottom.

     

    Firstly, is it safe to do this,

     

    Definitely not.

    Avoid the vias on your module and/or an the main board, or adjust the

    module's position so that no vias or anything else can unintentionally

    get in contact. This also applies to tracks etc. - don't ever trust on

    solder stop mask to be an insulator.

     

    and secondly, how do I edit the tStop layer.

    When I view it, I just see hatched circles where the vias are, but I dont

    seem to be able remove them.

     

    They are automatically generated with the vias. However, vias have a

    property by which you can turn this function off.

     

    But: I strongly recommend to leave vias open unless it's absolutely

    unavoidable to tent them - for reliability reasons.

     

    Tilmann

     

Reply

  • Chris schrieb:

     

    I am laying out a PCB that has a footprint for a module that is a PCB with

    side-plated contacts.

     

    Underneath the module there are a few vias and I am concerned they might

    short with vias on the underside of the PCB module.

     

    I thought that I coule edit tStop and remove the stop on the top layer, so

    that the vias are completely covered on the top, but open on the bottom.

     

    Firstly, is it safe to do this,

     

    Definitely not.

    Avoid the vias on your module and/or an the main board, or adjust the

    module's position so that no vias or anything else can unintentionally

    get in contact. This also applies to tracks etc. - don't ever trust on

    solder stop mask to be an insulator.

     

    and secondly, how do I edit the tStop layer.

    When I view it, I just see hatched circles where the vias are, but I dont

    seem to be able remove them.

     

    They are automatically generated with the vias. However, vias have a

    property by which you can turn this function off.

     

    But: I strongly recommend to leave vias open unless it's absolutely

    unavoidable to tent them - for reliability reasons.

     

    Tilmann

     

Children
No Data