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Soldermask error

autodeskguest

I am using a component with the FN40-6X6 package in the standard

libraries.  My board house reports a soldermask error on this component

- the soldermask does not completely cover the pad, the tip of the end

sticks out from under the soldermask.

 

How can I correct this?  Or do I even need to correct it?

 

I cannot see where the soldermask is defined.

--

John Bachman, W1JGB

AnaTek Corporation

 

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  • On 4/16/2010 9:49 AM, John Bachman wrote:

    I am using a component with the FN40-6X6 package in the standard

    libraries.  My board house reports a soldermask error on this component

    - the soldermask does not completely cover the pad, the tip of the end

    sticks out from under the soldermask.

     

    How can I correct this? Or do I even need to correct it?

     

    I cannot see where the soldermask is defined.

     

    Hi John,

     

    The solder mask is defined on the tstop and bstop layers. When a board

    is made the layers define the area of the pad that needs to be exposed,

    if the soldermask doesn't cover the whole pad then your part might not

    make electrical contact resulting in a faulty board. However sometimes

    the soldermask is restricted on purpose.

     

    My recommendation is to check the component manufacturer's recomendation

    and adjust your mask to that.

     

    The size and dimensions of the solder mask can be controlled through the

    DRC setup window. Go to DRC-> Masks, here you can set how much extra

    trim the solder mask has to give the pad.

     

    Hope this helps

     

    Jorge Garcia

    Cadsoft Computer

     

Reply

  • On 4/16/2010 9:49 AM, John Bachman wrote:

    I am using a component with the FN40-6X6 package in the standard

    libraries.  My board house reports a soldermask error on this component

    - the soldermask does not completely cover the pad, the tip of the end

    sticks out from under the soldermask.

     

    How can I correct this? Or do I even need to correct it?

     

    I cannot see where the soldermask is defined.

     

    Hi John,

     

    The solder mask is defined on the tstop and bstop layers. When a board

    is made the layers define the area of the pad that needs to be exposed,

    if the soldermask doesn't cover the whole pad then your part might not

    make electrical contact resulting in a faulty board. However sometimes

    the soldermask is restricted on purpose.

     

    My recommendation is to check the component manufacturer's recomendation

    and adjust your mask to that.

     

    The size and dimensions of the solder mask can be controlled through the

    DRC setup window. Go to DRC-> Masks, here you can set how much extra

    trim the solder mask has to give the pad.

     

    Hope this helps

     

    Jorge Garcia

    Cadsoft Computer

     

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