Magnetic sensor

摘要

A magnetic sensor (1) that prevents offset voltage from changing as time elapses. The magnetic sensor detects change in the direction of the magnetic field when the electric resistances (R1-R4) of magnetic resistors (11-14) change. The magnetic resistors of the magnetic sensor each include a heat treatment section (31a-34a and 41a-44a) formed by performing a pre-trimming heat treatment.