Actions
Forum Thread Details
  • Replies 1 reply
  • Subscribers 177 subscribers
  • Views 408 views
  • Users 0 members are here
Related

Filled capped vias in package definition?

autodeskguest

I have a problem I can't seem to solve.

 

I am making a board using Lumileds Rebel.  There are two options for 

thermals, one is a bunch of vias around the device, the other uses filled 

and capped vias.  The one in the Lumileds library uses the regular vias 

around the LED, I want to define my own using the filled capped vias.  So 

I want a matrix of 0.5mm vias that overlaps the thermal pad.

 

Here are the problems I am having

 

1) When I define the vias in the package with a very small annular ring, 

then when I bring that package into the device, it changes the ring and 

the vias all overlap (not such a problem since they are all tied to a 

copper pour on the front and back of the board, so it's all one big copper 

pad anyway, but it causes a lot of DRC errors since they are "too close")

 

2) When I place the device on my board, it automatically adds the solder 

stop mask to the vias, which I don't want.  I only want the stop mask over 

the thermal pad.  Some of the vias are in the pad, some are partially in 

the pad.  But I want to sort of override the stop mask on the vias, but I 

can't seem to do this

 

 

3) Once I place my devices, I want to add additional vias (that the board 

house will do as filled/capped) between the components.  But again, Eagle 

adds the solder stop mask to these vias.

 

How can I turn off solder stop mask on the vias I add to my board, as well 

as to vias that are in the package definition?  Any ideas?

 

Thanks

Mick

 

--

Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

 

  • Mick wrote:

    I have a problem I can't seem to solve.

     

    I am making a board using Lumileds Rebel.  There are two options for

    thermals, one is a bunch of vias around the device, the other uses

    filled and capped vias.  The one in the Lumileds library uses the

    regular vias around the LED, I want to define my own using the filled

    capped vias.  So I want a matrix of 0.5mm vias that overlaps the thermal

    pad.

     

    Here are the problems I am having

     

    1) When I define the vias in the package with a very small annular ring,

    then when I bring that package into the device, it changes the ring and

    the vias all overlap (not such a problem since they are all tied to a

    copper pour on the front and back of the board, so it's all one big

    copper pad anyway, but it causes a lot of DRC errors since they are "too

    close")

     

    2) When I place the device on my board, it automatically adds the solder

    stop mask to the vias, which I don't want.  I only want the stop mask

    over the thermal pad.  Some of the vias are in the pad, some are

    partially in the pad.  But I want to sort of override the stop mask on

    the vias, but I can't seem to do this

     

     

    3) Once I place my devices, I want to add additional vias (that the

    board house will do as filled/capped) between the components.  But

    again, Eagle adds the solder stop mask to these vias.

     

    How can I turn off solder stop mask on the vias I add to my board, as

    well as to vias that are in the package definition?  Any ideas?

     

    Thanks

    Mick

     

     

    Hi Mick,

    To disable solder stop mask on a via, use this command:

    CHANGE STOP OFF

     

    To enable solder stop mask on a via, use this command:

    CHANGE STOP ON

     

    If CHANGE STOP OFF is used, the auto-generated polygon on the stop layer

    will not be created, and your via will be covered with mask.

    IF CHANGE STOP ON is used, the auto-generated polygon on the stop layer

    will be created, and your via will not be covered with mask, leaving the

    copper exposed.

     

    These commands can be prefaced by a GROUP command, followed by using the

    CHANGE commands while holding the CTRL key. This will apply the CHANGE

    function on that group. You may easily select vias by displaying only

    the via layer with this command:

    DISPLAY NONE VIAS

     

    If you use the INFO command, and select a via, you will find a 'Stop'

    check box, which performs the same function as the CHANGE tool. This is

    useful if you have a single or couple of vias to modify, rather than

    using the CHANGE command.

     

    Please reply here with any more questions.- ted

    ted@markson.us