Writing and reading multi-level patterned magnetic recording...

Details Writing and reading multi-level patterned magnetic recording... Writing and reading multi-level patterned magnetic recording...

2011-03-22

2011-03-22

Klimowicz, William J (Department: 2627)

Dynamic magnetic information storage or retrieval

Record medium

Disk

C428S827000, C428S828000

Reexamination Certificate

active

07911739

ABSTRACT:
A method and apparatus for writing magnetization states in a pair of magnetic islands of a multi-level patterned magnetic recording medium and a method and apparatus for reading readback waveforms representing the written magnetization states of a pair of magnetic islands of a two-level patterned magnetic recording medium. Writing each magnetization state includes selecting the magnetization state, determining a write current sufficient to write the magnetization state, and applying the write current to a magnetic write head to write the magnetization state by simultaneously writing associated magnetic states in each magnetic island of the pair of magnetic islands. Reading the readback waveform representing the written magnetization state is implemented through use of a magnetic read head and includes: identifying the written magnetization state by decoding the readback waveform; and displaying and/or recording the written magnetization state.

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