Patent ID: 7082671

Claim:
A magnetic disc apparatus production method comprising steps of: bonding a piezoelectric element thin plate having on its both sides an electrode film, onto a substrate using one of the electrode films as a bonding surface, forming a first insulation thin film on the other electrode film of the piezoelectric thin plate, forming a plurality of recording/reproduction elements at a predetermined interval on the insulation thin film, forming a second insulation thin film on the recording/reproduction elements, cutting the substrate into row substrates, each having the recording/reproduction elements arranged in a row, polishing that surface of the row substrate having the recording/reproduction elements, forming a plurality of float planes by etching the side surfaces of the row substrate, forming a protection film on the side surfaces of the row substrate, cutting the row substrate into slider chips, bonding the slider chip onto a gimbal spring, wiring the recording/reproduction element and the electrodes of the piezoelectric element in the slider chip to the gimbal spring.