A probe configured to measure the magnetic permeability of a magnetic body includes a first signal conductor and a second signal conductor that form a pair of signal conductors, the first and second signal conductors being a signal transmission path, and tip ends of the first and second signal conductors being disposed away from a surface of the magnetic body by a predetermined gap length and at a predetermined interval from each other; a linear conductor that electrically connects the tip ends of the first and second signal conductors and that extends between the tip ends; and a first ground conductor and a second ground conductor that form a pair of ground conductors disposed in the vicinity of the pair of signal conductors, tip ends of the first and second ground conductor being in contact with the surface of the magnetic body.

A hard disk status testing apparatus, including: a voltage reading module, a controller, an analogue switch, and multiple hard disk slot units. Each hard disk slot unit includes: a hard disk status testing module and a hard disk status indication module. The hard disk status testing modules and the hard disk status indication modules among different hard disk slot units are time-multiplexed, achieving independent control of the hard disk status testing modules of different hard disk slot units and independent control of the hard disk status indication modules of different hard disk slot units. A hard disk status testing method that effectively solves the problem of an increase in the number of pins needed for hard disk status testing and status indication, thus effectively decreasing hardware costs and increasing the utilization rate of pin resources.

Aspects of this disclosure relate to one or more particles that move within a container in response to a magnetic field. A measurement circuit is configured to output an indication of the magnetic field based on position of the one or more particles.

According to one embodiment, a method includes: supplying electrical energy to a first path by an inspection circuit with a short circuit between two first terminals through a first probe; and detecting an electrical characteristic on the first path by the inspection circuit. The two first terminals are included in a plurality of second terminals included in a flexible printed circuit board. The flexible printed circuit board includes: an electronic component including the inspection circuit and a plurality of third terminals; the plurality of second terminals; and a plurality of first wired lines connecting the plurality of second terminals and the plurality of third terminals. The first path is formed by: the two first terminals; two second wired lines connected to the two first terminals among the plurality of first wired lines; and two fourth terminals connected to the two second wired lines among the plurality of third terminals.

To reduce a measurement time, an inspection device includes a stage configured to fix a magnetoresistive random access memory (MRAM) to a stage surface and moving the MRAM, a plurality of magnets configured to generate a gradient magnetic, a plurality of line sensors comprising a first line sensor for detecting a magneto-optical effect at a first location of the MRAM and a second line sensor for detecting the magneto-optical effect at a second location that is different from the first location by moving a location of the MRAM within the gradient magnetic field, and an information processor configured to process the magneto-optical effect detected by the plurality of line sensors. Thus, throughput may be improved.

A magnetic property measuring system includes a stage configured to hold a sample and a magnetic structure disposed over the stage. The stage includes a body part, a magnetic part adjacent the body part, and a plurality of holes defined in the body part. The magnetic part of the stage and the magnetic structure are configured to apply a magnetic field, which is perpendicular to one surface of the sample, to the sample. The stage is configured to move horizontally in an x-direction and a y-direction which are parallel to the one surface of the sample.

The disclosure describes an apparatus for testing a component, wherein the apparatus is configured to apply a magnetic field with a magnetic field orientation from a set of magnetic field orientations to the component. The apparatus is further configured to perform a test on the component in the presence of the respective magnetic fields with the respective magnetic field orientations from the set of magnetic field orientations to obtain an information characterizing an operation of the component. The apparatus is also configured to determine a test result based on the information characterizing the operation of the component in the presence of different magnetic fields with different magnetic field orientations from the set of magnetic field orientations. The disclosure also describes a method of testing and a computer-readable storage device for implementing the method and provides more efficiency in view of reliability and costs.

A test fixture for testing magnetic heads to be used in a magnetic data recording system. The test fixture includes a test fixture body that includes lead terminals. The lead terminals, which can be constructed of Si have a top surface and first and second laterally opposed sides. An electrically conductive material is formed over the lead terminal and extends down the sides of the lead terminal. Extending the lead terminal down the sides of the lead terminal as well as over the top surface provides improved adhesion of the electrically conductive lead material to the lead terminal. This improved adhesion is especially beneficial for use in such a test fixture, because the test fixture is designed to flex during use, which would otherwise contribute to de-lamination of the electrically conductive lead material from the lead terminal.

A magnetic property measuring system includes a stage configured to hold a sample and a magnetic structure disposed over the stage. The stage includes a body part, a magnetic part adjacent the body part, and a plurality of holes defined in the body part. The magnetic part of the stage and the magnetic structure are configured to apply a magnetic field, which is perpendicular to one surface of the sample, to the sample. The stage is configured to move horizontally in an x-direction and a y-direction which are parallel to the one surface of the sample.

An HGA loader provides HGAs, in succession, to a multiple workstation head tester. An HGAs carrier station receives HGAs to be tested. An alignment station on the base includes an alignment surface which selectively rotates about an alignment axis. A camera generates images of an HGA on the alignment surface, which is rotated so that the HGA has a desired spatial orientation which is maintained as the HGA is transferred to an HGA testing workstation. A received, oriented HGA is positioned to enable read/write test operations on a disk rotating on an adjacent spinstand. To effect the successive position operations, a transporter includes a track overlying the workstations, and a carriage movable along the track, to pass from workstation to workstations. The loader is automatically operative under the control of a controller.