MAGNETO-RESISTANCE EFFECT TYPE HEAD, INSPECTION DEVICE FOR MAGNETO-RESISTANCE EFFECT TYPE HEAD AND MAGNETIC STORAGE DEVICE MOUNTING MAGNETO-RESISTANCE EFFECT TYPE HEAD

摘要

PURPOSE: To prevent the generation of damages to the magneto-resistance effect type head by providing a protection circuit for short-circuiting between a pair of electrodes when current more than a specified value is impressed to the pair of electrodes. ;CONSTITUTION: Electrodes 110 are mutually linked at the rear parts of the electrodes 110 via a Schottky diode 100 and a metal line 120. This diode 100 is a protection circuit in which no electricity is conducted when a specified driving power of a magneto-resistance effect type head 40 is applied. For example, current value of about 24mA and voltage of about 200mV are applied and when a voltage more than 300mV is instantaneously impressed, electricity is connected and the interval between the electrodes 110 is short-circuited. No electricity is conducted in the head 40 constituted like this by a normal driving power and when excess current generated by charge and static electricity through human intervention during an inspection process, etc., is given, electricity is conducted in the diode 100, the rear end part of the electrode is short-circuited and thus, the impression of the excess current to a magneto- resistance effect element 85 is prevented. Thus, damages to the element 85 is prevented by the short-circuiting between the electrode 110.;COPYRIGHT: (C)1994,JPO&Japio