| 摘要 |
<p>A multilayer printed circuit board is provided to obtain a noise suppression effect when a Ferrite film is used within the multilayer printed circuit board. A multilayer printed circuit board includes two external conductive layers and two internal conductive layers. The two internal conductive layers are intrinsically made of a magnetic material. The external conductive layers serve as first and second signal layers(351,352). The internal conductive layers serve as a ground layer(321) and a power source layer(322). First and second ferrite films(331,332) are formed on the ground layer and the power source layer. The first ferrite film is positioned between the first signal layer and the power ground layer and the second ferrite film is positioned between the second signal layer and the power source layer.</p> |
