| 摘要 |
PROBLEM TO BE SOLVED: To reduce the impact of external magnetism on an electronic component, while avoiding an increase in the size of an electronic controller of a circuit board mounting the electronic component.SOLUTION: An inside layer 81a of a control circuit board 6 at a part corresponding to the mounting position of an electronic component (e.g., a Hall element) of magnetic protection object mounted on the control circuit board 6 is provided away from a surrounding inside layer 81b. The inside layer 81a, 82a are ground layers, for example. Installation area of the inside layer 81a is larger than the mounting area of the electronic component, and set near the periphery thereof.SELECTED DRAWING: Figure 3 |
