Patent ID: 8166630

Claim:
A magnetic head slider manufacturing method, comprising: a stacked-layer forming step which stacks, on a substrate, magnetic heads each including a reproducing element and a recording element; a lapping step which cuts out a bar block having a plurality of connected magnetic head sliders containing the magnetic heads, and polishes a flying surface where the reproducing element and the recording element are exposed; and a slider cutting step which cuts out individual magnetic head sliders from the bar block, wherein: the stacked-layer forming step forms a reproducing-element polish amount detecting sensor whose output value changes by being polished on a same layer as that of the reproducing element, and forms a recording-element polish amount detecting sensor whose output value changes by being polished on a same layer as that of the recording element so as to form the recording-element polish amount detecting sensor and/or the reproducing-element polish amount detecting sensor substantially in a ladder form which includes a plurality of band-like parts extended perpendicularly to a polishing direction provided at a prescribed interval and includes a pair of connection parts for connecting end parts of the plurality of band-like parts with each other; and the lapping step carries out polishing based on each output value of the reproducing-element polish amount detecting sensor and the recording-element polish amount detecting sensor.