1. Field of the Invention
The present invention generally relates to a printed circuit board. More particularly, the present invention relates to a printed circuit board integrated with a two-axis fluxgate sensor and a method for manufacturing the same.
2. Description of the Related Art
The existence of magnetic energy has been proven through various physical phenomena. For example, a fluxgate sensor enables a human to indirectly perceive magnetic energy, since magnetic energy is not perceivable by human sense organs, such as eyes or ears. Regarding a fluxgate sensor, a magnetic sensor employing a soft magnetic coil has been conventionally used. A magnetic sensor is made by winding a coil around a relatively large bar-shaped core or annular-shaped core, which is formed of a soft magnetic ribbon. In addition, an electronic circuit is employed to obtain a magnetic field in proportion to the measured magnetic field.
The conventional fluxgate sensor, however, has the following problems, some of which are due to the structure of the conventional fluxgate sensor. In the structure of a conventional fluxgate sensor the coil being wound around the large bar-shaped core or annular-shaped core, which is made of the soft magnetic ribbon, results in high production costs and a large volume of the overall system.
In addition, flux leakage is inevitable in the flux change due to the excitation coil and the detected magnetic field. Accordingly, high sensitivity is not readily achieved.
Further, a conventional fluxgate sensor for detecting magnetic energy in two axes includes two separate one-axis fluxgate sensors arranged in perpendicular relation with each other, which results in yet another problem of the device size increasing.