Invention Grant
US08896965B2 Non-uniform write gap perpendicular writer for shingle writing 有权
用于瓦片写入的非均匀写入间隙垂直写入器

Non-uniform write gap perpendicular writer for shingle writing
Abstract:
A PMR writer is disclosed that includes at least one of a recessed center section in the write pole trailing edge and a center recessed trailing shield to improve the field gradient at track edge. In all embodiments, there is a non-uniform write gap between the trailing edge and the trailing shield. The recessed portion of the write pole trailing edge and/or center recess of the trailing shield has a thickness from 10 to 40 nm in a down-track direction and a width in a cross-track direction of 20 to 200 nm. The distance between the center recess and a corner of the trailing edge is from 20 to 80 nm. A sequence of steps is provided to fabricate the two embodiments of the present invention.
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