| 摘要 |
PURPOSE:To eliminate crosstalk between input and output signal wires, by arranging shieding surfaces on and under the signal wires, and arranging shielding wires also between the neighboring signal wires. CONSTITUTION:A first ceramic plate 11 has an aperture in the central part, and is laminated via a first shielding surface 6. A shielding wire 2 is arranged between neighboring signal wires 1. A second ceramic plate 12 has the wider aperture in the central part, and thereon a second shielding surface 8 is formed. This plate is laminated on the ceramic plate 11. Through holes 31, 32 connect the shielding surface 6 and the shielding surface 8 to a ground line or a power supply line. A viahole 34 or a viahole 35 connects the shielding surface 6 or the shielding surface 8 to the shielding wire 2. A bonding wire 4 connects the inner peripheral vicinity of the shielding wire 2 to the shielding surface 8. Thereby, crosstalk between input and output signal wires can be eliminated. |
