PRINTED CIRCUIT BOARD

PROBLEM TO BE SOLVED: To provide a printed circuit board wherein an influence of electromagnetic interference is suppressed. SOLUTION: The printed circuit board includes a ground pattern that is connected with the ground terminal of an integrated circuit through a first wiring, and a power supply pattern that is arranged parallel to the ground pattern with a slit in-between and is connected with the power supply terminal of the integrated circuit through a second wiring. A difference in length between the ground pattern and the power supply pattern along the lengthwise direction of the slit is one-twentieth or less of wavelength of a radio communication signal. A difference in distance is one sixth or less of the wavelength of a radio communication signal, between a point where the first wiring is connected to the ground pattern from the ground terminal along the lengthwise direction and another point where the second wiring is connected to the power supply pattern from the power supply terminal. COPYRIGHT: (C)2007,JPO&INPIT