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    • 7. 发明授权
    • Enhancing signal path characteristics in a circuit board
    • 增强电路板中的信号路径特性
    • US07045719B1
    • 2006-05-16
    • US10274573
    • 2002-10-21
    • Arthur R. AlexanderJames L. KnightenJun Fan
    • Arthur R. AlexanderJames L. KnightenJun Fan
    • H01R12/04
    • H05K1/0251H05K1/0298H05K1/116H05K1/185H05K3/429H05K2201/09327H05K2201/09718Y10T29/49165
    • A circuit board includes multiple signal layers, in which signal lines are routed, and power reference plane layers, in which power reference planes (e.g., power supply voltage or ground) are provided. Vias are passed through at least one signal layer and at least one power reference plane layer, or alternatively, vias are passed through at least two power reference plane layers. In one arrangement, a first clearance is defined around the via at the signal layer and a second clearance is defined around the via at the power reference plane layer. The second clearance is larger in size than the first clearance to match or tailor the impedance of the via as closely as possible with the impedance of the signal line that the via is electrically connected to. In another arrangement, clearances around vias at different power reference plane layers are selected to have different sizes to enhance the ability of one of the power reference plane layers (the one with a smaller clearance size) to carry a higher current level.
    • 电路板包括其中信号线路由的多个信号层和功率参考平面层,其中提供功率参考平面(例如,电源电压或地)。 通孔通过至少一个信号层和至少一个功率参考平面层,或者替代地,通孔穿过至少两个功率参考平面层。 在一种布置中,在信号层周围围绕通孔限定第一间隙,并且在功率参考平面层周围的通孔周围限定第二间隙。 第二间隙的尺寸大于第一间隙,以便匹配或调整通孔的阻抗尽可能接近通孔电连接到的信号线的阻抗。 在另一种布置中,选择不同功率参考平面层上的通孔周围的间隙以具有不同的尺寸以增强功率参考平面层(具有较小的间隙尺寸的一个)之一的能力承载更高的电流水平。
    • 10. 发明授权
    • Side plated electromagnetic interference shield strip for a printed
circuit board
    • 用于印刷电路板的侧面电磁干扰屏蔽条
    • US5586011A
    • 1996-12-17
    • US297346
    • 1994-08-29
    • Arthur R. Alexander
    • Arthur R. Alexander
    • H05K1/00H05K1/02H05K9/00
    • H05K9/0039H05K1/0218H05K1/0298
    • An electric circuit board including EMI shielding. The board comprises a substrate including top and bottom surfaces and at least one internal ground layer, the internal ground layer being electrically insulated from the external surfaces of the substrate. A plurality of vias are formed in the substrate near the edges of the substrate, each via providing an opening from the surface of the substrate to the internal ground layer A metal plating is applied to the vias, the edges of the substrate and the perimeter of the surface of the substrate, the metal plating along the substrate perimeter being applied over the plated-up vias to electrically connect the ground plane with the metal plating applied to the edges of the substrate.
    • 包括EMI屏蔽的电路板。 该基板包括一个包括顶面和底面以及至少一个内部接地层的基板,该内部接地层与该基板的外表面电绝缘。 在基板的靠近基板的边缘处形成多个通孔,每个通孔提供从基板的表面到内部接地层A的开口。金属镀层被施加到通孔,基板的边缘和周边 衬底的表面,沿着衬底周边的金属电镀施加在电镀通孔上,以将接地平面与施加到衬底的边缘的金属电镀电连接。