Composite shield structure of PMR writer for high track density
AssigneeHeadway Technologies, Inc.
InventorsLijie Guan, Morris Dovek, Joe Smyth, Yoshitaka Sasaki
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AssigneeHeadway Technologies, Inc.
InventorsLijie Guan, Morris Dovek, Joe Smyth, Yoshitaka Sasaki
Estimating the term…
Improved writability and a substantial reduction in adjacent track erasure are achieved by incorporating a composite shield structure in a PMR writer. There is a trailing shield formed a certain distance above the top surface of a write pole, a leading shield formed a certain distance below the bottom surface of the write pole, and a partial side shield having a section formed on each side of the write pole. The partial side shield thickness is less than that of the write pole. Each partial side shield section has a side that is parallel to the nearest write pole side and a top surface that is offset from the write pole top surface by 0 to 0.15 microns. A plurality of magnetic connections between two or more shield elements is employed to ensure correct magnetic potential. The large write pole has a flare angle of 45 to 75 degrees.
A composite shield structure in a perpendicular magnetic recording (PMR) write head having a main pole layer with a write pole terminating at a pole tip at an air bearing surface (ABS) wherein said write pole has a thickness along an axis that represents a down-track direction, a top surface that is the top edge of the pole tip which has a track width in a cross-track direction, a bottom surface that is the bottom edge of the pole tip which is also the leading edge as the pole tip moves over a recording media, and two sides that connect the top and bottom surfaces, comprising:
A PMR write head, comprising:
Dependencies are inferred from the claim text.