Abstract: A head suspension has a piezoelectric element that deforms in response to an applied voltage, a base plate provided with an opening to which the piezoelectric element is attached, and a load beam fixed to the base plate so that a front end of the load beam moves in a sway direction according to deformation of the piezoelectric element. The head suspension includes an adhesive applied to a gap between the piezoelectric element and the opening, to attach the piezoelectric element to the opening. The adhesive has a thixotropic characteristic and is sol when applied to the gap.

Abstract: A processing device is provided with a circuit connected to a first conductive portion and a second conductive portion. An AC voltage source produces an AC waveform voltage obtained by adding a bias voltage to an AC voltage for capacitance measurement. The AC waveform voltage is applied between the first conductive portion and the second conductive portion through the measurement probes. The moment the AC waveform voltage is applied to the circuit with a switch closed, an inrush current flows through the circuit based on a potential difference of the bias voltage. This inrush current causes dielectric breakdown in the conductive resin, thereby securing the continuity of the conductive resin. With the continuity of the conductive resin secured, a capacitance of the piezoelectric body is measured by the AC waveform voltage, and it is determined whether or not the piezoelectric body is normal.

Abstract: A piezoelectric element 13 has a common electrode 19 that receives electricity from a terminal 57. The terminal 57 has a through hole 67 and an electric insulating layer 61. The piezoelectric element 13 is arranged so that the common electrode 19 faces the electric insulating layer 61 of the terminal 57. A liquid stopper 69 is formed around the through hole 67 so as to come between the common electrode 19 and the terminal 57 when the common electrode 19 and terminal 57 are set to face each other. A liquid conductive adhesive 71 is injected into the through hole 67 to fill a gap defined by the liquid stopper 69 between the terminal 57 and the common electrode 19 and secure electric connection between the terminal 57 and the common electrode 19. This configuration improves the reliability of wiring to the piezoelectric element and prevents the piezoelectric element from being damaged.

Abstract: A processing device is provided with a circuit connected to a first conductive portion and a second conductive portion. An AC voltage source produces an AC waveform voltage obtained by adding a bias voltage to an AC voltage for capacitance measurement. The AC waveform voltage is applied between the first conductive portion and the second conductive portion through the measurement probes. The moment the AC waveform voltage is applied to the circuit with a switch closed, an inrush current flows through the circuit based on a potential difference of the bias voltage. This inrush current causes dielectric breakdown in the conductive resin, thereby securing the continuity of the conductive resin. With the continuity of the conductive resin secured, a capacitance of the piezoelectric body is measured by the AC waveform voltage, and it is determined whether or not the piezoelectric body is normal.

Abstract: A head suspension has a piezoelectric element 13 that deforms in response to a voltage applied thereto, a base plate 33 provided with an opening 43 to which the piezoelectric element is attached, and a load beam 35 that is fixed to the base plate 33 so that a front end of the load beam 35 moves in a sway direction according to the deformation of the piezoelectric element 13. The head suspension includes an adhesive 51 applied to a gap 50 between the piezoelectric element 13 and the opening 43, to attach the piezoelectric element 13 to the opening 43. The adhesive 51 has a thixotropic characteristic and is sol when applied to the gap 50. A displacement of the piezoelectric element is correctly transmitted to the load beam. The head suspension properly keeps a rigidity balance and vibration characteristic.

Abstract: A piezoelectric element 13 has a common electrode 19 that receives electricity from a terminal 57. The terminal 57 has a through hole 67 and an electric insulating layer 61. The piezoelectric element 13 is arranged so that the common electrode 19 faces the electric insulating layer 61 of the terminal 57. A liquid stopper 69 is formed around the through hole 67 so as to come between the common electrode 19 and the terminal 57 when the common electrode 19 and terminal 57 are set to face each other. A liquid conductive adhesive 71 is injected into the through hole 67 to fill a gap defined by the liquid stopper 69 between the terminal 57 and the common electrode 19 and secure electric connection between the terminal 57 and the common electrode 19. This configuration improves the reliability of wiring to the piezoelectric element and prevents the piezoelectric element from being damaged.

Abstract: A static posture correcting apparatus has a controller preparing a correction recipe-table, a measuring unit measuring a pitch angle and a roll angle of a head portion of a flexure of a head suspension, a laser irradiating unit irradiating laser beams on irradiation lines of a flexure of an objective head suspension, the controller selecting an effectual correction recipe from the correction recipe-table and controlling the laser irradiating section to irradiate laser beams on the irradiation lines of the flexure of the objective head suspension according to the selected correction recipe, wherein the controller considers variations among reference values of pitch angle and roll angle changes of the sample head suspensions when preparing the correction recipe-table and selects the recipe so as to diminish an expected variation in target static posture angle characteristic due to correction.

Abstract: A static posture correcting apparatus has a controller preparing a correction recipe-table, a measuring unit measuring a pitch angle and a roll angle of a head portion of a flexure of a head suspension, a laser irradiating unit irradiating laser beams on irradiation lines of a flexure of an objective head suspension, the controller selecting an effectual correction recipe from the correction recipe-table and controlling the laser irradiating section to irradiate laser beams on the irradiation lines of the flexure of the objective head suspension according to the selected correction recipe, wherein the controller considers variations among reference values of pitch angle and roll angle changes of the sample head suspensions when preparing the correction recipe-table and selects the recipe so as to diminish an expected variation in target static posture angle characteristic due to correction.