Perpendicular magnetic recording head having a magnetic layer overhanging a trailing side of a main pole and method of manufacture thereof

A method of manufacturing a magnetic recording head, the method comprising:

• forming a first inorganic insulating film on a substrate, the first inorganic layer having a flattened top so that a top of a yoke portion of a main pole is exposed, the main pole having a throat height portion that defines a recording track width by a facing surface facing a recording medium and a flare portion that is integrally formed with the throat height portion and gradually increased in width in an element height direction;
• forming a step in the inorganic insulating film;
• forming a second inorganic insulating film on the stepped first inorganic insulating film;
• etching the second inorganic insulating film to form a rectangular pedestal for cutting a groove;
• sequentially depositing an electrode layer for forming magnetic side shields disposed on both sides of the main pole in a track width direction of the main pole;
• sequentially depositing a protective film for protecting each side face of the rectangular pedestal on each side face of the rectangular pedestal;
• coating organic resin over each surface;
• etching the organic resin until the rectangular pedestal is exposed;
• forming a groove having an inverted trapezoidal profile in the rectangular pedestal;
• expanding the groove in the rectangular pedestal;
• filling the groove in the rectangular pedestal with a magnetic plating film;
• removing any extraneous magnetic plating film above the groove;
• removing the protective film on each side face of the rectangular pedestal to expose the electrode layer for forming each magnetic side shield layer;
• forming each magnetic side shield layer by magnetic plating;
• flattening the magnetic plating;
• depositing an inorganic insulating film on a substrate, which is flattened so that surfaces of respective regions are exposed;
• forming a resist pattern on the inorganic insulating film;
• etching the inorganic insulating film, each magnetic side shield layer, the rectangular pedestal, and the magnetic layer in the groove with the resist pattern as a mask;
• depositing an electrode layer for forming a trailing magnetic shield on a trailing side of the main pole;
• and
• forming a magnetic plating layer for forming the trailing magnetic shield which overhangs in a track width direction on the trailing side of the main pole and on a throat height portion at a back of the main pole in the element height direction with respect to an ABS.