| 摘要 |
A print board comprises a ground layer, an insulation layer, a signal layer formed on the insulation layer, formed in a predetermined line pattern, and serving as a transmission line for transmitting high-speed signals, and a pad formed on the signal layer. The signal layer has a line width that satisfies a characteristic impedance required for the transmission line, and the width of the signal layer is set substantially equal to the width of the pad.
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