| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a print circuit board in which GND layers arranged opposite in the transmission line via an insulation layer have a mesh structure, the print circuit board being designed such that the characteristic impedance of the transmission line is held and also signal quality and power source quality are ensured by the effects such as noise diffusion prevention and GND electrode fluctuation hindrance.SOLUTION: A print circuit board comprises: a transmission line; a guard pattern arranged adjacent to and in the same layer as the transmission line; and mesh GND layers arranged opposite in the transmission line via an insulation layer and also having a mesh area in which a conductor is composed of, in a mesh form, opening parts having no conductors and mesh parts serving as a conductor portion. In the print circuit board, the transmission line and the guard pattern are arranged in an area corresponding to the mesh area of the mesh GND layer via the insulation layer. The mesh parts always serving as a feedback path are disposed under the guard pattern.</p> |
