| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the occurrence of electromagnetic interference between different types of circuit and EMI due to electromagnetic coupling in a GHz band, in a power supply system of a printed circuit board or a semiconductor package. SOLUTION: The printed circuit board comprises a power supply layer 21, a ground layer 22, and a dielectric layer 23. The dielectric layer 23 comprises two kinds of base materials 24 having specific inductive capacities different from each other and a patch 25. Between the power supply layer 21 and the ground layer 22, the patches 25 are periodically arrayed between the base materials 24. COPYRIGHT: (C)2007,JPO&INPIT
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