Patent ID: 7263039
Filing Date: 2007-08-28
Classification: G11B

Abstract:
1. An optical pickup head of an optical recording/reproducing apparatus having a micro-actuator, comprising: a slider having a converging lens integrally formed at a central portion, a magnetic field-generating coil formed around the converging lens and an air-bearing surface formed at a lower surface; and an objective lens micro-actuator for micro-actuating an objective lens for transmitting an optical beam of a transmitting/receiving circuit to the converging lens in an optical axial direction, wherein the objective lens micro-actuator comprises: a lower substrate positioned at an upper portion of the slider, the lower substrate having a mounting hole at a central portion and a plurality of lower fixed electrodes formed at regular intervals at an inner circumferential surface of the mounting hole; an upper substrate installed at an upper side of the lower substrate, the upper substrate having a mounting hole at a central portion that substantially corresponds to a shape of the mounting hole in the lower substrate, and a plurality of upper fixed electrodes formed at regular intervals at an inner circumferential surface of the mounting hole; an insulation layer interposed between the lower substrate and the upper substrate; a moving substrate inserted in the mounting holes of the lower substrate and the upper substrate to be actuated in an optical axial direction, and having moving electrodes formed at an outer circumferential surface so as to be alternately arranged between the lower fixed electrodes and upper fixed electrodes; a plurality of electrode pads for supplying power to the lower substrate, the upper substrate and the moving substrate in order to drive the moving substrate.