| 摘要 |
PROBLEM TO BE SOLVED: To provide a multilayer printed wiring board in which neither malfunction nor errors occur even if a frequency exceeds 3GHz. SOLUTION: A distance D1 between a conductor layer 34P on a surface of a multilayer core substrate 30 and an inner conductor layer 16E , a distance D2 between the inner conductor layer 16E and a metal plate 12, a distance D3 between the metal plate 12 and the inner conductor layer 16P, and a distance D4 between the inner conductor layer 16P and a conductor layer 34E at a rear face are made uniform. Mutual inductance between the conductor layers and the metal plate is set constant, and inductance as the whole core substrate 30 is lowered by arranging the conductor layers and the metal plate so that the distances become uniform. COPYRIGHT: (C)2005,JPO&NCIPI |
