Patent ID: 6507455
Filing Date: 2003-01-14
Classification: G11B

Abstract:
A thin film magnetic head comprising a lower core layer formed of a magnetic material, an upper core layer formed of a magnetic material, a magnetic gap layer formed between the upper core layer and the lower core layer at a portion adjacent to a side opposed to a recording medium, and a coil layer comprising a conductor that is wound around the periphery of a base end portion of the upper core layer to form a plurality of turns, said coil layer inducing a recording magnetic field in the lower core layer and the upper core layer,wherein a conductor width of each successive turn of the conductor of the coil layer as measured along a line extending from a center of the coil layer toward an outer periphery of the coil layer increases at a fixed ratio, and wherein the conductor width of the conductor in each turn of the coil layer as measured along a first normal extending from the center of the coil layer to the side opposed to the recording medium is smaller than the conductor width as measured along a second normal extending from said center of the coil layer in a direction opposite to the first normal.