发明名称 |
ELECTROMAGNETIC RADIATION REDUCTION TECHNIQUE USING GROUNDED CONDUCTIVE TRACES CIRCUMSCRIBING INTERNAL PLANES OF PRINTED CIRCUIT BOARDS |
摘要 |
An EMR reduction technique using grounded conductive traces and vias circumscribing the internal planes of printed wiring boards. Conductive vias are placed in a circuitous path near the border and encircling the signal traces of each layer of a printed circuit board. The ground plane is extended to encompass and electrically ground each of the vias. For each signal plane, a conductive trace is routed and connected to each of the vias forming a grounded shield around the signal-carrying traces on the signal plane. For the power planes, a conductive trace is also provided connecting the conductive vias and forming a grounded shield around the power planes. A non-conductive path is provided between the power plane and the power plane conductive trace to electrically isolate the voltages of the power plane from the grounded conductive trace. |
申请公布号 |
WO9408445(A1) |
申请公布日期 |
1994.04.14 |
申请号 |
WO1993US09203 |
申请日期 |
1993.09.24 |
申请人 |
COMPAQ COMPUTER CORPORATION |
发明人 |
GEBARA, GHASSAN, R. |
分类号 |
H05K1/02;H05K9/00;(IPC1-7):H05K9/00 |
主分类号 |
H05K1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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