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Centering Clines Within BGA

eddieb1

 Hello experts,

Is there a function that I can use to center only the clines inside the BGA area?

If so how do go I about it?

For instance, what skill code can I use to shove/move single clines or dual clines in between (or in the middle of) the BGA vias?

  - where if there are two clines in between vias, the air gap is 1x or 2x of the trace width.

Below is a simple illustration:

 

Single cline centered in between BGA vias:

o I o I o I o

Dual CLine centered in between BGA vias::

o IxI o IxI o

 

Where:

o = via

I = Cline

x = air gap between two clines.

 Note:

In some areas of the BGA, the vias are in-line while in some areas (at the periphery) the via pitch is mixed, that is a combination of 10mm and 8mm  - stagered pitch.

 Thanks,

Eddie

  • I don't have any existing code but I'll see if I can knock up a few lines to test the idea and get you started.

  •  Thanks Dave!

     Can't wait to see it.

     BTW - I tried the one that's in the Glossing Controler > Center lines between pads. It didn't work and made things worst as it moved the clines loop around pads and made them longer. It also introduced new errors by crossing clines.

     

    Eddie.

  • Well, this code sort of works. However it's not of much use to you without a lot of work. I'm only handling a single cline. You will need to use complex grid settings for multiple clines.

    defun( DE_BGAClineCentre (via1, via2, clineSeg)

    via1xy = via1 ->xy

    via2xy = via2 ->xy

     

    ; Set grids:

    layer = clineSeg ->layer

    grid = axlDBGridGet(layer)

    originalGrid = copy(grid)

    grid ->xOrigin = car(via1xy)

    grid ->yOrigin = cadr(via1xy)

    if(axlGeoEqual(car(via1xy), car(via1xy)); I'm assuming that the vias are on orthogonal locations. Otherwise this method will not work.

    then grid ->yGrids = axlDistance(via1xy, via2xy) / 2.0; The shoved cline needs to be centered on the y grid

    else grid ->xGrids = axlDistance(via1xy, via2xy) / 2.0; The shoved cline needs to be centered on the x grid

    )

    axlDBGridSet(grid)

     

    ; Shove the cline segment

    shoveMode = 0

    cornerType = 45

    gridded = 1

    params = list(shoveMode cornerType gridded)

    axlShoveSetParams(params)

    axlShoveItems(list(clineSeg))

     

    ;Restore the original grid.

    axlDBGridSet(originalGrid)

    ) 

  •  Thanks Dave.

     

    It's a start. I'll give a whirl and let you know if it's something I can use.

    BTW, is there a function when vias in diagonal formation, as in staggered formation?

     

    Eddie.

     

  • Yes, it's only a start - and then just an idea.

    It would be possible to use the same method for (45 degree) staggered vias but the grid calculations would get slightly more complicated
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