Headway (TDK) Assigned Patent

Headway Technologies, Inc., Milpitas, CA, has been assigned a patent (8,817,420) developed by Moris Dovek, Glen Garfunkel, and Po Kang Wang, San Jose, CA, for a “write head having recessed magnetic material in gap region.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.“

The patent application was filed on Feb. 6, 2012 (13/367,354).