Method of measuring interconnect coupling capacitance in an IC c

Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element

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324658, G01R 3126, G01R 2726

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059990104

ABSTRACT:
A method for measuring the coupling capacitance between two interconnect lines of an integrated circuit structure having a ground plane. The steps include shorting the first and second lines together and measuring a first capacitance (Ct) between the ground plane and the shorted first and second lines; eliminating the short between the first and second lines; shorting the first line to the ground plane and measuring a second capacitance (C1) between the second line and the shorted ground plane and first line; eliminating the short between the first line and the ground plane; shorting the second line to the ground plane and measuring a third capacitance (Cc) between the first line and the shorted ground plane and second line; and determining the coupling capacitance between the first line and the second line according to the formula Cc=(C1+C2-Ct)/2.

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