Magnetic head with a main pole including first and second layers and manufacturing method for the same

A manufacturing method of a magnetic head, the magnetic head including:

• a medium facing surface configured to face a recording medium;
• a coil configured to generate a magnetic field corresponding to data to be written on the recording medium;
• a main pole having an end face located on the medium facing surface, the main pole being configured to pass a magnetic flux corresponding to the magnetic field generated by the coil and to generate a write magnetic field for writing the data on the recording medium;
• and
• a substrate having a top surface, wherein
• the coil and the main pole are disposed over the top surface of the substrate,
• the main pole includes a first layer including the end face, and a second layer lying on the first layer,
• the first layer includes a thickness-changing portion whose dimension in a direction perpendicular to the top surface of the substrate decreases with decreasing distance to the medium facing surface, and
• at least part of the second layer is located on the thickness-changing portion,
• the manufacturing method comprising the steps of:
• forming the coil;
• and
• forming the main pole,
• wherein the step of forming the main pole includes the steps of:
• forming the first layer;
• and
• forming the second layer such that at least part of the second layer is located on the thickness-changing portion.