Tdk Corporation

Tsugihiro Hasebe

Akio Ogawa

Tetsuo Abe

Hiroshi Shindou

Osamu Fukuroi

In the polishing work for forming a crown shape on a ceramic bar bearing a plurality of conversion units for the magnetic heads, the present invention is to provide a well-controlled satisfactory shape by pressing the ceramic bar, provided with plural grooves perpendicular to the longitudinal direction and on a surface opposed to the polished plane, to a substantially concave polishing plane through an elastic member principally composed of rubber, then measuring the magneto resistivity of an element provided in the conversion unit of the magnetic head, and adjusting the pressure at the crown forming operation by a closed loop control based on the result of such measurement.

Polishing apparatus for magnetic head and method therefor

An apparatus for lapping a workpiece including a plurality of magnetic heads supported by a tool is disclosed. The lapping apparatus comprises a rotary lapping table, a lapping head attachment frame, an adjuster ring resiliently supported by the frame, a lapping head attached to the adjuster ring, a tilting assembly attached to the lapping head, and an up and down movable back plate pivotally attached to the lapping head. The apparatus further comprises first actuators or cylinders for correcting balance by applying forces on right and left sides of the pivotal point of the back plate, and second actuators or cylinders for correcting bow of the workpiece by applying operating forces on a plurality of predetermined locations of the tool so that the moving directions of movable parts of the second actuator means are substantially parallel with the directions of the operating forces.

Growing community of inventors

Tokyo, Japan

Tsugihiro Hasebe