| 摘要 |
PROBLEM TO BE SOLVED: To improve the technology of processing a magnetic disk head, to quickly and easily change electric resistance between two read side pads 6r, and to repeatedly switch between a connected conductive state and an electric insulated state (or high resistance state). SOLUTION: A phase-change material 9 is arranged in a bridge shape between two write side pads 6W to apply a laser beam 10 to the phase-change material. The laser beam is set to a laser pulse. A signal PS for a short-width high energy pulse and a signal PL for a long-width low energy pulse are sent from a control pulse generator, and selected by a pulse switch 14 to be applied to a laser generator 12. The phase-change material 9 changes in temperature according to a laser pulse form, and made in amorphous upon reception of a laser pulse of a short-width high energy to be set in an electric insulated state. Thus, electric measurement is not blocked. Upon reception of a laser pulse of a long-width low energy, the material 9 is crystallized to be set conductive, thereby preventing electrostatic discharge damage. COPYRIGHT: (C)2007,JPO&INPIT
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