According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head including a read head, a write head, a heater and the magnetic head, and a sensor and the control section. The control section when applying electric power to the heater, the control section predicts, on the basis of a relationship between a value of the electric power to be applied to the heater and an output value of a spectrum at a pulse frequency of a DC output of the sensor in a state where pulsed electric power is applied to the heater, the output value of the spectrum, and detects contact between the magnetic head and the magnetic disk before the predicted output value of the spectrum becomes less than or equal to a threshold.

According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head including a read head, a write head, a heater and the magnetic head, and a sensor and the control section. The control section when applying electric power to the heater, the control section predicts, on the basis of a relationship between a value of the electric power to be applied to the heater and an output value of a spectrum at a pulse frequency of a DC output of the sensor in a state where pulsed electric power is applied to the heater, the output value of the spectrum, and detects contact between the magnetic head and the magnetic disk before the predicted output value of the spectrum becomes less than or equal to a threshold.

According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head including a read head, a write head, a heater and the magnetic head, and a sensor and the control section. The control section when applying electric power to the heater, the control section predicts, on the basis of a relationship between a value of the electric power to be applied to the heater and an output value of a spectrum at a pulse frequency of a DC output of the sensor in a state where pulsed electric power is applied to the heater, the output value of the spectrum, and detects contact between the magnetic head and the magnetic disk before the predicted output value of the spectrum becomes less than or equal to a threshold.

According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head including a read head, a write head, a heater and the magnetic head, and a sensor and the control section. The control section when applying electric power to the heater, the control section predicts, on the basis of a relationship between a value of the electric power to be applied to the heater and an output value of a spectrum at a pulse frequency of a DC output of the sensor in a state where pulsed electric power is applied to the heater, the output value of the spectrum, and detects contact between the magnetic head and the magnetic disk before the predicted output value of the spectrum becomes less than or equal to a threshold.

A slider design for a hard disk drive (HDD) features a shallow cavity adjacent to a leading edge that has patterns of sub-cavities of various shapes etched into its base to reduce its original surface area. The presence of these patterns of sub-cavities significantly reduces the probability that the slider will capture particles on the surface of a rotating disk and thereby reduces the corresponding probability of surface scratches that such captured particles inevitably produce.

A slider design for a hard disk drive (HDD) features a shallow cavity adjacent to a leading edge that has patterns of sub-cavities of various shapes etched into its base to reduce its original surface area. The presence of these patterns of sub-cavities significantly reduces the probability that the slider will capture particles on the surface of a rotating disk and thereby reduces the corresponding probability of surface scratches that such captured particles inevitably produce.

A slider design for a hard disk drive (HDD) features a shallow cavity adjacent to a leading edge that has patterns of sub-cavities of various shapes etched into its base to reduce its original surface area. The presence of these patterns of sub-cavities significantly reduces the probability that the slider will capture particles on the surface of a rotating disk and thereby reduces the corresponding probability of surface scratches that such captured particles inevitably produce.

A slider design for a hard disk drive (HDD) features a shallow cavity adjacent to a leading edge that has patterns of sub-cavities of various shapes etched into its base to reduce its original surface area. The presence of these patterns of sub-cavities significantly reduces the probability that the slider will capture particles on the surface of a rotating disk and thereby reduces the corresponding probability of surface scratches that such captured particles inevitably produce.

An opposite-side dielectric ceramic layer is in contact with a first opposite-surface electrode layer and a second opposite-surface electrode layer. A mounting-side dielectric ceramic layer is in contact with a first mounting-surface electrode layer and a second mounting-surface electrode layer. A mounting-side inner electrode layer is separated from the first mounting-surface electrode layer and the second mounting-surface electrode layer by the mounting-side dielectric ceramic layer, disposed on the mounting-side dielectric ceramic layer, extending from a first side-surface electrode layer, and separated from a second side-surface electrode layer. In a cross-sectional view including a lamination direction and a length direction, a position in which the second mounting-surface electrode layer has a maximum thickness is shifted toward a second side surface in the length direction with respect to a position in which the second opposite-surface electrode layer has a maximum thickness.

An opposite-side dielectric ceramic layer is in contact with a first opposite-surface electrode layer and a second opposite-surface electrode layer. A mounting-side dielectric ceramic layer is in contact with a first mounting-surface electrode layer and a second mounting-surface electrode layer. A mounting-side inner electrode layer is separated from the first mounting-surface electrode layer and the second mounting-surface electrode layer by the mounting-side dielectric ceramic layer, disposed on the mounting-side dielectric ceramic layer, extending from a first side-surface electrode layer, and separated from a second side-surface electrode layer. In a cross-sectional view including a lamination direction and a length direction, a position in which the second mounting-surface electrode layer has a maximum thickness is shifted toward a second side surface in the length direction with respect to a position in which the second opposite-surface electrode layer has a maximum thickness.