Method of manufacturing a vertical recording magnetic head

A method of manufacturing a vertical recording magnetic head including a main magnetic pole layer formed with a track width on a surface opposite to a recording medium, the method comprising the steps of:

• forming a pair of neck height markers so that when a plane, that intersects the pair of neck height markers, moves from a shallow side to a deep side, an area of a portion of the plane that intersects the first of the pair of neck height markers increases while an area of a portion of the plane that intersects the second of the pair of neck height markers decreases, wherein
• the first and the second of the pair of neck height markers are disposed spaced apart and not in contact with each other,
• the first of the pair of neck height markers has a first side in a cross section perpendicular to the surface opposite to the recording medium and parallel to the direction in which the first and the second of the pair of neck height markers are separated, the second of the pair of neck height markers has a second side in the cross section perpendicular to the surface opposite to the recording medium and parallel to the direction in which the first and the second pair of neck height markers are separated, and
• the first side and the second side face each other and are in parallel;
• and
• determining whether a neck height position of the main magnetic pole layer falls within an adequate position range based on exposure area ratios of the pair of neck height markers interposing the main magnetic pole layer therebetween in a surface to be polished.

A method of manufacturing a vertical recording magnetic head including a main magnetic pole layer formed with a track width on a surface opposite to a recording medium, the method comprising the steps of:

• forming a pair of neck height markers so that when a plane, that intersects the pair of neck height markers, moves from a shallow side to a deep side, an area of a portion of the plane that intersects the first of the pair of neck height markers increases while an area of a portion of the plane that intersects the second of the pair of neck height markers decreases, wherein
• the first and the second of the pair of neck height markers are disposed spaced apart and not in contact with each other,
• the first of the pair of neck height markers has a first side in a cross section perpendicular to the surface opposite to the recording medium and parallel to the direction in which the first and the second of the pair of neck height markers are separated, the second of the pair of neck height markers has a second side in the cross section perpendicular to the surface opposite to the recording medium and parallel to the direction in which the first and the second pair of neck height markers are separated, and
• the first side and the second side face each other and are in parallel;
• and
• after polishing the surface opposite to the recording medium to define a size of a height direction of the read element, determining whether a neck height position of the main magnetic pole layer falls within an adequate range based on exposure area ratios of the pair of neck height markers exposed on the surface to be polished.