Generating the electromagnetic coil element and approach place light for the entry which the thin film magnetic head and head which has approach place optical occurrence layer and

摘要

PROBLEM TO BE SOLVED: To provide a thin-film magnetic head wherein near-field light generated from a near-field light generation means sufficiently reaches a recording layer part of a recording medium, and the coercive force of the recording layer part is sufficiently reduced during writing.;SOLUTION: This thin-film magnetic head is provided with a substrate having a medium facing surface and an element forming surface vertical to the medium facing surface, an electromagnetic coil element formed in the element forming surface and used for writing, a near-field light generation layer for heating the writing part of a magnetic recording medium when near-field light is generated to execute writing, and a cover layer formed on the element forming surface so as to cover the electromagnetic coil element and the near-field light generation layer. The near-field light generation layer has a shape tapered toward the head end surface of the medium facing surface side, and is provided with a near-field light generation part including a tip reaching this head end surface. Further, a thermal expansion projected layer made of a material having a thermal expansion coefficient higher than that of a material of the cover layer is disposed near the near-field light generation part.;COPYRIGHT: (C)2007,JPO&INPIT