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  3. A question about Closed Form Via

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A question about Closed Form Via

seongkeun
seongkeun over 16 years ago
First case, via hole has two pads.
*****************************************************************            PortIndx PortName           LayerName         SparaIndx*            1            Via_Top Via_TOP             NA*

            2            Via_S1   Via_S1   NA
*****************************************************************

Closed-form formula solution
C0 Via_Top 0 3.44198e-014C1 Via_S1 0 3.44198e-014R01 Via_Top Via_S1 1e-7 L=2.66972e-010****************************************************************Second case, via hole has three pads.*****************************************************************            PortIndx PortName           LayerName         SparaIndx*            1            Via_Top Via_TOP             NA*            2            Via_S1   Via_S1   NA*

            3            Via_Bot  Via_BOTTOM      NA
*****************************************************************

Closed-form formula solution
C0 Via_Top 0 7.35125e-014C1 Via_S1 0 7.35125e-014C2 Via_Bot 0 7.35125e-014R01 Via_Top Via_S1 1e-7 L=2.66972e-010R02 Via_Top Via_Bot 1e-7 L=8.99779e-010R12 Via_S1 Via_Bot 1e-7 L=6.32807e-010In first case, via hole has only one serial resistor.In second case, via hole has two serial resistors and one parallel resistor.It's same that first case's r01 value and second case's r01 value.When adds one pad, the R12 happens.(R01 + R12 = R02 and R01 + R12 // R02)But, what's the r02.I am not understand.
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