| 摘要 |
<p>PURPOSE:To obtain a very thin type multilayer coil having an electromagnetic shielding function by a method wherein the proximity arrangement of a coil and an electromagnetic shielding conductor can be made possible by providing a solenoid coil, with which the magnetic flux is generated in parallel with the surface of a substrate, on a multilayer circuit substrate. CONSTITUTION:A multilayer circuit substrate is composed of the insulating layers 2 pinched by conductive layers 1A, 1B-1G and each conductive layer. Lines 3A and 3B-3D/4A-4C in parallel with each other are provided on the conductive layers 1B and 1C, the starting points of the lies 3A and 4A are electrically connected using a through hole 5A, and the ending points of the lines 3B and 4A are electrically connected using a through hole 5E. A solenoid type coil having rectangular cross section is formed by successively connecting the starting point and the ending point of each lines as above-mentioned through the intermediary of the insulating layers 2, and also the coil electrodes 8A and 8B provided on the electromagnetic shielding conductor layer 1A are connected to the end part of the coil. As a result, the direction of the magnetic flux generated on the coil is brought in parallel with the surface of the substrate, and the shielding conductive layer 1A can be arranged in close vicinity to the coil without having no influence of the effect of the coil.</p> |
