| 摘要 |
A flip chip integrated circuit package which has a layer of nickel-boron (Ni-B) on the contact pads of the package substrate and a layer of nickel-phosphorus (Ni-P) on the pins of the substrate. A layer of gold is plated onto the layers of nickel. An integrated circuit with a plurality of solder bumps is placed onto the contact pads of the substrate. The package is heated to reflow the solder bumps, gold and nickel-boron into solder joints that attach the integrated circuit to the substrate. The package is then typically shipped and mounted to a printed circuit board by soldering the pins to the board. |
