Connection List

Many leadframes require special bonding: double bonds on some die pads to fingers, stitch bonds, no connect fingers and finger-paddle bonds. In such cases the automatic approach is not viable.

 

 

Instead the designer should use a connection list - a simple ASCII file that lists each die pad number and the finger that it should be wired to. The connection list supports double bonds, stitch bonds, downbonds and even finger-paddle bonds.



Sample Connection List

   1   206
   2   205
   2   205
   3   0
   4   204
   4   203
   5   0
   6   202
   7   202
   8   202
 

Here is an example of using a connection list to wire several die pads to ground. Then the ground fingers are wired to the paddle. This prevents high current from going through a few bond wires.

; DIEPAD  FINGER

  1       PADDLE
  2       2
  3       3
  4       4
  .
  .
  .
  205     205
  206     206
  207     207
  208     PADDLE
  PADDLE  1
  PADDLE  52
  PADDLE  53
  PADDLE  104
  PADDLE  105
  PADDLE  156
  PADDLE  157
  PADDLE  208
 


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