Preamplifier integrated circuit on flex circuit for magnetic...

Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With contact or lead

Reexamination Certificate

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Details

C257S690000, C257S693000, C257S698000, C257S700000

Reexamination Certificate

active

07414306

ABSTRACT:
A preamplifier integrated circuit (IC) for a magnetic storage device includes a plurality of channels, each including at least one preamplifier and one or more interconnecting layers. A passivation layer is arranged adjacent to the interconnecting layers. A plurality of first external connections are arranged in openings in the passivation layer, are in contact with at least one of the interconnecting layers and are adapted to distribute a first potential to the preamplifiers. The plurality of channels are arranged in a plurality of groups, each of the plurality of groups includes at least one of the channels. At least one of the first external connections independently communicates with at least a respective one of the plurality of channels. The first potential is distributed to a respective one of the plurality of groups via the corresponding at least one of the external connections.

REFERENCES:
patent: 5300839 (1994-04-01), Kawahara et al.
patent: 5744898 (1998-04-01), Smith et al.
patent: 6249824 (2001-06-01), Henrichs

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