Patent ID: 7180186
Filing Date: 2007-02-20
Classification: H01C,H01G,H01L,H05K,Y02P

Abstract:
1. A ball grid array package comprising: a) a ceramic substrate having a first and a second surface, and a plurality of vias extending through the substrate between the first and second surfaces; b) a plurality of conductors, located on the first surface, the conductors at least partially surrounding the vias, the conductors each having an opening surrounding the via; c) at least one resistor located on the first surface and connected between at least two of the conductors; d) a conductive epoxy filling each of the vias and the opening, the conductive epoxy in electrical contact with the conductors, the conductive epoxy further extending onto the second surface such that the conductive epoxy at least partially surrounds each of the vias on the second surface; e) a cover coat located over the resistor, the conductors and the conductive epoxy; f) a plurality of copper balls located on the second surface, the copper balls attached to the conductive epoxy, the conductive epoxy providing an electrical connection between the conductors and the copper balls; and g) a metal alloy covering the copper balls except where the copper balls are attached to the conductive epoxy.