| 摘要 |
PROBLEM TO BE SOLVED: To provide a high sensitivity ferromagnetic fine particle detector where variation in characteristics is suppressed. SOLUTION: The ferromagnetic fine particle detector comprises a magnetic sensor 10M having an operation layer 12 of a compound semiconductor thin film formed on an insulating substrate 11, a plurality of terminal electrodes 13 and a large number of short circuit electrodes 14, and a metal case 18 for protecting a permanent magnet 15 applying a bias magnetic field vertically to the compound semiconductor thin film composing the operation layer 12 and a magnetic sensor 10M wherein a magnetic field having flux density exceeding 0.1 tesla is applied to the operation layer 12 becoming a magneto-sensitive plane. COPYRIGHT: (C)2006,JPO&NCIPI
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