Write head alignment for full amplitude time-based servo

Details Write head alignment for full amplitude time-based servo Write head alignment for full amplitude time-based servo

2007-04-03

2007-04-03

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S077120

Reexamination Certificate

active

10813495

ABSTRACT:
The invention is directed to a servo writing apparatus having accurate alignment of write gaps of servo write heads. In particular, the write gaps substantially align in a servo channel corresponding to a servo band of a magnetic data storage tape. The servo band is fully magnetized (a.k.a. DC erased) in one direction by a direct current (DC) magnetic field across the write gap of one of the servo write heads. Time-based servo markings magnetized in a second direction are recorded on the fully magnetized servo band by a pulsed magnetic field across the write gaps of the other servo write head. The servo write heads may be mounted in a mounting structure within the servo writing apparatus. Maintaining a large mounting structure width to servo write head separation distance ratio improves write gap alignment accuracy, which assures full servo signal strength across the servo band without magnetizing adjacent data bands.

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Co-pending U.S. Appl. No. 10/328,460, filed Dec. 23, 2002, Yung Yip and Richard W. Molstad, entitled “Full Amplitude Time-Based Servopositioning Signals”.

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