| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multilayer wiring board with a built-in inductor for appropriately restricting factors such as a line and a space of coil wiring in the inductor formed on the multilayer wiring board, and thereby reducing a pattern forming area as much as possible, obtaining a predetermined inductance value, and coping with a higher oscillation frequency. <P>SOLUTION: In the multilayer wiring board with a built-in inductor, spiral conductor patterns (11-14) in the shape of a plurality of windings are formed in respective layers of the multilayer board, one end of the spiral conductor pattern is interlayer-connected to the other end of the upper spiral conductor pattern, the other end of the spiral conductor pattern is interlayer-connected to one end of the lower conductor pattern, and thus a coil (10) which is in a helical shape as a whole is formed. The ratio of a space (distance A) between lines of conductive patterns in each layer to an interlayer space (distance B) between the conductor patterns is set to A>B. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
