Patent ID: 8307538
Filing Date: 2012-11-13
Classification: G11B,H01L,Y10T

Abstract:
1. A method for manufacturing a head gimbal assembly, wherein the head gimbal assembly comprising: a head slider having a thin film magnetic head for performing at least one of recording to and reproducing from a magnetic recording medium; a suspension to which the head slider is mounted; and a thin film piezoelectric actuator for displacing the head slider relatively to the suspension; and the method comprising: a step for preparing the thin film piezoelectric actuator, the thin film piezoelectric actuator including a suspension preparation step for preparing the suspension, the suspension including a fixing step for fixing the thin film piezoelectric actuator to the thin film piezoelectric actuator mounting area of the suspension; an electrical connecting step for electrically-connecting the first electrode layer, the second electrode layer, the third electrode layer, and the fourth electrode layer to the first electrode, the second electrode, the third electrode, and the fourth electrode, respectively; a first repolarization treatment step for performing repolarization treatment to the first piezoelectric layer by applying voltage between the first electrode layer and the second electrode layer such that, after the fixing step, an electric field having a direction that orients from the first electrode layer to the second electrode layer is generated in the first piezoelectric layer, and an electric field having a direction opposite to a direction that orients from the third electrode layer to the fourth electrode layer is not generated in the second piezoelectric layer; a second repolarization treatment step for performing repolarization treatment to the second piezoelectric layer by applying voltage between the third electrode layer and the fourth electrode layer such that, after the fixing step, an electric field having a direction that orients from the third electrode layer to the fourth electrode layer is generated in the second piezoelectric layer, and an electric field having a direction opposite to a direction that orients from the first electrode layer to the second electrode layer is not generated in the first piezoelectric layer; and a step for fixing the head slider to the suspension.