International Business Machines Corporation

Katsushi Yamaguchi

Hiroaki Suzuki

Hideo Asano

Kenji Kuroki

Takao Matsui

Tatsuya Endo

Kazushi Tsuwako

Yasuhiro Sasao

Hirokazu Yamamoto

A magnetic head handling glove capable of preventing the buildup of static charges and electric charge leakage and capable of withstanding use in clean rooms is described. In the magnetic head handling glove of the present invention, the outer surface alone or both the outer surface and inner surface of a conductive glove are coated with dissipative material . This results in coating of the conductive glove with materials useable in clean rooms and may suppress possible contamination that can result when a conventional conductive glove, lacking in such coating of dissipative material, is used directly in a clean room. Besides this, the conductive glove is configured to be grounded directly with wire . In this way, even an operator prone to the buildup of static charges can be sufficiently prevented from building up static electrical charges and electric charge leakage.

Magnetic head handling glove

In accordance with the present invention, the initialization for orienting the magnetized directions of the free layers of GMR heads (mounted on the diagonally shaded surface of sliders,) by an external magnetic field is again executed also for the opposite direction, thereby to increase the yield of the GMR heads. Further, it is determined whether the magnetized direction of the pinned layer of GMR heads can be once reversed to the opposite direction, thereby to select damaged GMR heads at an early stage. Then, by performing a reset while performing a quasi-static test for seeing the read back response of the GMR head after restoring the magnetized direction of the pinned layer to a positive rotation, a safe and efficient reset is executed. The reset can be executed not only by applying only a pulse, but also while providing an external magnetic field in the pinning direction, or only by giving a high magnetic field. A tool,can be commonly used for the initialization, reset, or read back response through each process level. For the quasi-static test, coils,, and,are selectively used as Helmholz coils.

Methods for initializing and/or resetting GMR heads by applying oppositely directed magnetic fields

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Honfujisawa, Japan

Katsushi Yamaguchi