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ESD phenomena in GMR heads in the manufacturing process of HDD and GMR heads

机译:HDD和GMR磁头制造过程中GMR磁头中的ESD现象

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摘要

It is well known that giant magnetoresistive (GMR) heads used for hard disk drives (HDD) are very sensitive to electrostatic discharge (ESD). In this paper, we describe a method of categorizing ESD damage modes from a standpoint of magnetic influences on the heads as observed by quasi-static test (QST) characteristics as well as electromagnetic characteristics like off-track profiles. In addition, we report an example of GMR stack interlayer diffusion which is one type of hard ESD damage. We also present an example of ESD damage that happened in an actual production process and its preventive measures as guidelines.
机译:众所周知,用于硬盘驱动器(HDD)的巨型磁阻(GMR)磁头对静电放电(ESD)非常敏感。在本文中,我们描述了一种从ESD(静电放电)损坏模式分类的方法,该方法是通过准静态测试(QST)特性以及磁道特性(例如磁道偏离)观察到的磁头对磁影响的角度来进行的。此外,我们报告了GMR堆叠夹层扩散的示例,这是一种严重的ESD损坏。我们还以实际生产过程中发生的ESD损坏为例,并提供了预防措施作为指导。

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