Patent ID: 6987649

Claim:
A magnetic head apparatus comprising: a slider carrying a reproducing element for detecting magnetic signals recorded on a recording medium by a magnetoresistive effect and a recording element for recording magnetic signals on the recording medium; a wiring member including an insulating layer overlying a conductive material and further including reproducing conductive patterns overlying the insulating layer and connected with the reproducing element and recording conductive patterns connected with the recording element; elastic support members for supporting the slider and the wiring member; piezoelectric elements for changing the posture of the slider by causing distortions of the elastic support members; wherein electrodes of the piezoelectric elements are temporarily connected to the conductive material so as to have equal electric potentials, where in at least one of the electrodes of the piezoelectric elements is a grounding electrode which is connected to a ground, and wherein the wiring member has a control conductive pattern for supplying control signals, the control conductive pattern being connected with electrodes other than the grounding electrode of the piezoelectric elements and being connected with the ground; and test pads connected with the reproducing conductive pattern, the recording conductive pattern, and the control conductive pattern at an end of the wiring member opposite to an end where the wiring member and the recording element are connected, the control conductive pattern being grounded at a region on the wiring member which is removable together with the test pads.