All I want is the current capacity. Consider power delivery Balls > Plane > Wires or Bumps If my IC needs 20 Amps DC for core support how many bumps are needed to supply this? I know the capacity of the ball pads on the bottom (cu thickness / width / size ). I know a blind via (filled can carry 400 ma) and I can use multiple vias / ball pad/. I know the planes can handle more than 20 AMPS. I know if it is Wirebond each 0.9 mil wire can handle 900 ma. So how much can a ball carry underrated? I'll figure out what I would like to apply as a derating i.e. the addition of balls till I'm comfortable with the power delivery. I want to design quantity of Balls to a real spec. I want to decide my margin. I know that 400 ma is bull. Balls can pull AMPS. Brian Schieck NVidia Corporation 2701 San Tomas Expressway MS B22-221 Santa Clara, California 95050 Direct Phone # (408) 486-2697 Corp Phone # (408) 486-2000 x62697 Local Fax # (408) 486-8078 Corp Fax # (408) 486-2200 Email bschieck@xxxxxxxxxx -----Original Message----- From: James.Freeman@xxxxxxxxxxxx [mailto:James.Freeman@xxxxxxxxxxxx] Sent: Wednesday, February 05, 2003 4:30 PM To: Brian Schieck Subject: RE: [SI-LIST] Current capacity of a Solder Ball Hi Brian, How are things. Are you looking at a bump or a ball for this info? Jim Freeman -----Original Message----- From: Brian Schieck [mailto:BSchieck@xxxxxxxxxx] Sent: Wednesday, February 05, 2003 11:13 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Current capacity of a Solder Ball Does any one know what the current carrying capacity of a solder ball is? How is the capacity determined? Is the capacity derated to account for temperature and voids? for a 60 mil solder ball. Brian Schieck NVidia Corporation 2701 San Tomas Expressway MS B22-221 Santa Clara, California 95050 Direct Phone # (408) 486-2697 Corp Phone # (408) 486-2000 x62697 Local Fax # (408) 486-8078 Corp Fax # (408) 486-2200 Email bschieck@xxxxxxxxxx ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu