| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact planar coil having a high inductance and a planar transformer, by using one or a plurality of small size printed wiring boards of the same specification for forming a board laminate. <P>SOLUTION: A board laminate S is configured by turning over a plurality of printed wiring boards 1 of the same specification alternately, and superimposing them sequentially while abutting the first outer layer surfaces 1a or the second outer layer surfaces 1c to each other. Connection components, i.e., chip resistors 27 of 0 Ω, are then attached arbitrarily between first and second selection connections 41, 42 and between third and fourth selection connections 43, 44. A planar coil having a desired number of turns can be achieved easily by connecting between the first conductors 11 or between the sixth conductors 16 in these printed wiring boards P sequentially. <P>COPYRIGHT: (C)2013,JPO&INPIT |
