High-sensitivity pickup actuator for disc drive

Details High-sensitivity pickup actuator for disc drive High-sensitivity pickup actuator for disc drive

2008-04-01

2008-04-01

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07352663

ABSTRACT:
A pickup actuator of a disc drive includes a pair of magnets, each facing a respective side of a bobbin and having a middle region with a first polarity and side regions with a second polarity opposite of the first polarity. The pickup actuator includes a plurality of tracking coils disposed on the respective sides of the bobbin facing the magnets. Each tracking coil has two effective coil portions with one facing the middle region and the other facing one of the side regions of the magnet, for higher sensitivity. The magnets are disposed at two sides of a bobbin for lower cost and complexity of manufacture.

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