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METHOD AND APPARATUS FOR TESTING BATCH FABRICATED MAGNETIC HEADS DURING MANUFACTURE UTILIZING MAGNETIC FIELDS GENERATED BY OTHER MAGNETIC HEADS
METHOD AND APPARATUS FOR TESTING BATCH FABRICATED MAGNETIC HEADS DURING MANUFACTURE UTILIZING MAGNETIC FIELDS GENERATED BY OTHER MAGNETIC HEADS
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机译:在制造过程中利用其他磁头产生的磁场测试分批制造的磁头的方法和装置
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摘要
Magnetic head elements are batch fabricated on areas of a substrate. During manufacture, and before final separation and processing of the areas into discrete multi-track magnetic heads, defective areas are identified for removal. An electric signal source subjects the head areas to a magnetic field which is detected as electric current in each head area. The detected current value in acceptable head areas falls within a predefined range. All head areas having a current outside the range are defined as defective. The magnetic field emanates from one set of head areas in the vicinity of another set of head areas being tested.
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