| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic sensor having the contact hole of a nm order size. SOLUTION: This magnetic sensor is constructed in such a manner that upper and lower electrode layers 3 and 1 are provide, sandwiching a granular structure film 2 having a magneto-resistive effect film 3, the granular structure film 2 is a structure film made of at least two phases including an insulator matrix 22 and the granular metal 21 of a diameter d, dispersed in the insulator matrix 22, the film thickness t of the granular thickness film 2 satisfies 0<t<d, and the upper and lower electrode layers 4 and 1 conductive to each other through the magneto-resistive effect film 3 and the granular metal 21.
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