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4layer design support

Former Member

I am now using eagle.
In layer setup i used this equations.
[3:1*2*3*16:2]
i am not a proffesional worker.
So can u please generate a equation 4 layer set up.
i need connections form Top layer to 3rd layer.
3rd layer to bottom layer.
2nd layer to bottom layer.
Could you please generate layer setup

  • 0

    On 12/5/2011 4:30 AM, Sirosh Sivaraman wrote:

    I am now using eagle.

    In layer setup i used this equations.

    i am not a proffesional worker.

    So can u please generate a equation 4 layer set up.

     

    >

     

    i need connections form Top layer to 3rd layer.

    3rd layer to bottom layer.

    2nd layer to bottom layer.

     

    >

     

    Could you please generate layer setup

     

     

    Some example stackups are given on page 131 of the manual.  The one I am

    using for 4 layers is (12+316).  The parenthesis indicate that vias

    are continuous (this is more economical than blind vias).  I believe for

    blind vias you use brakets [] instead of parenthesis.

     

  • 0

    Am 05.12.2011 11:30, schrieb Sirosh Sivaraman:

    So can u please generate a equation 4 layer set up.

     

    i need connections form Top layer to 3rd layer.

    3rd layer to bottom layer.

    2nd layer to bottom layer.

     

    Do you REALLY want so-called 'blind vias', meaning that these go from

    the outside to a certain inner layer AND STOP THERE?

     

    If yes, then you SHOULD ask your circuit board manufacturer how the

    layers should be constructed: Not every manufacturer can create all

    theoretically possible layer stacks. Try

       ()

    or

       ()

    but both MAY be very expensive or problematic to manufacture. Exchanging

    the contents of layers 2 and 3 results in a much nicer layer stack, e.g.

       ()

     

    But, as John Friede already pointed out, CONTINUOUS vias (going

    completely THROUGH the board) are much cheaper and less error-prone. If

    you can live with these, try the layer stack that John suggested:

       (12+316)

     

    Andreas Weidner