PURPOSE: To suppress generation of electric noise without reducing the degree of freedoms of roundabout of a wiring pattern and the capacity of wirings by incorporating a chip capacitor or an electronic component having a function corresponding to the capacitor.

CONSTITUTION: A reflow pattern 7 for mounting a chip capacitor is provided on an upper surface of an electronic component 1, one side is connected to a power source pin 3, and the other side is connected to a ground pin 4. Further, a chip capacitor 5 is placed on the pattern 7. The upper surface of the component 1 is entirely coated with a protective film 6 made of insulating resin, etc. The capacitor 5 is connected to a power source layer and a ground layer assembled in a printed circuit board through the pins 3 and 4 of the component 1. Thus, noise generated from an oscillator of the board can be removed by the capacitor 5.