Patent ID: 8803309

Claim:
A preamplifier integrated circuit (IC) for a magnetic storage device, the preamplifier IC comprising: a plurality of channels, each including at least one preamplifier; a plurality of groups that each include at least one of the channels; at least one interconnecting layer; a passivation layer arranged adjacent to the at least one interconnecting layer; and a first solder bump arranged in a first opening in the passivation layer, the first solder bump to distribute a first potential to a first group of the plurality of groups but not to a second group of the plurality of groups; a second solder bump arranged in a second opening in the passivation layer, the second solder bump to distribute the first potential to the second group but not to the first group; and a flex circuit that includes a first trace, the first trace to distribute the first potential to the first solder bump and the second solder bump.