US 8,803,309 B1Granted

Preamplifier integrated circuit on flex circuit for magnetic media storing devices

AssigneeMarvell International Ltd.

InventorKien Beng Tan

Life of this patent

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Abstract

A preamplifier integrated circuit (IC) for a magnetic storage device comprises a plurality of channels, each including at least one preamplifier and a plurality of groups. Each of the groups includes at least one of the channels. A passivation layer is arranged adjacent to at least one interconnecting layer. A plurality of first external connections external to the IC are arranged in openings in the passivation layer, are in contact with at least one of the interconnecting layers, that distribute a first potential to the at least one preamplifier of the plurality of channels, and communicate with the plurality of groups. Each of the plurality of first external connections distributes the first potential to first respective ones of the plurality of groups independently of others of the plurality of groups.

Claims10

Dependent claims

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.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/221,707Filed 6 Aug 2008 · continuation
Priority: 12 Dec 2002
Granted: 12 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G11B 5/09
Recording, reproducing, or erasing methods; Read, write or erase circuits therefor: digital recording
G11B 5/484
Specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives: integrated arm assemblies, e.g.…
G11B
Information storage based on relative movement between record carrier and transducer