Patent ID: 8304290

Claim:
An apparatus to connect an integrated circuit device to a substrate, the apparatus comprising: a plurality of standard diameter electrically conductive pillars disposed on an integrated circuit device; three or more increased diameter electrically conductive pillars disposed on the integrated circuit device, the increased diameter pillars having a height that is similar to a height of the standard diameter pillars, the increased diameter pillars having a diameter that is greater than a diameter of the standard diameter pillars, the standard diameter pillars and the increased diameter pillars forming a pattern on the integrated circuit device, the pattern corresponding to a plurality of electrically conductive contact pads disposed on a substrate opposite the integrated circuit device, the heights of the increased diameter pillars and the standard diameter pillars disposed on the integrated circuit device being greater than a height of the contact pads disposed on the substrate; a first group of solder bumps disposed between the standard diameter pillars and contact pads corresponding to the standard diameter pillars; and a second group of solder bumps disposed between the increased diameter pillars and contact pads corresponding to the increased diameter pillars, solder bumps in the second group of solder bumps having a pre-connection height that is greater than a pre-connection height of the first group of solder bumps, the greater pre-connection height of the second group of solder bumps pulling the first group of solder bumps into contact with both the contact pads and the standard diameter pillars in response to at least the second group of solder bumps melting.