Electronics Forum: ibm ccga design rules (5)

Re: CCGA stencil design

Electronics Forum | Mon Mar 20 10:54:36 EST 2000 | Glenn Robertson

Jack - The last time I checked IBM was specifying a minimum of 4800 cubic mils of paste for each pad. This is required for acceptable reliability, not just to make the connection. There is no way you are getting that volume with a 5 mil stencil

Re: CCGA stencil design

Electronics Forum | Sat Mar 18 07:33:34 EST 2000 | Dave F

Jack: Two concerns with column devices: 1 Coplaniarity of the device and the board. 2 Adequate solder that you mentioned, becuase the columns will not be reflowing and you need to cloatthem with solder. You didn't describe your aperture, but even

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