| 摘要 |
Apparatus (10) for testing a plurality of magnetic recording heads (12). The apparatus includes a tool (16) which supports a bar (14) that contains individual magnetic recording heads. Alternatively, the tester may contain a tool which supports a plurality of individual sliders. The tool (16) locates the heads within a magnetic field emanating from a coil (22) wound magnet (20). The magnet has a length and permeability that provides a uniform magnetic field for each slider in the bar. The apparatus (10) includes a probe card (32) that has a plurality of probe needles (34) which make simultaneous contact with bonding pads (36) of each head (12). The needles (34) are coupled to a test circuit that applies constant current to the magnetic recording heads and measures a voltage change as a function of a varying magnetic field. The tester can sequentially test the heads without spatially moving the bar, thereby minimizing test cycle time may test two or more of the heads simultaneously.
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