| 摘要 |
PROBLEM TO BE SOLVED: To provide an inspection method and an inspection device of the characteristic impedance of a measuring line capable of determining which is generated, a contact failure between a line to be measured on a wiring circuit board and a measuring probe or an impedance failure of the line to be measured, in an inspection method for inspecting the characteristic impedance of the line to be measured on the circuit wiring board by TDR method. SOLUTION: This characteristic impedance inspection device of the circuit wiring board has a characteristic impedance waveform measuring means 10 capable of measuring a characteristic impedance waveform of the line to be measured on the circuit wiring board; a normal value registering means 20 for registering beforehand a characteristic impedance value and a time until divergence occurs by the characteristic impedance waveform of the line to be measured; and a comparison/determination means 30 for calculating the characteristic impedance value and the time until the divergence occurs from the characteristic impedance waveform of the line to be measured at the inspection time, and performing comparison operation processing with normal data of the line to be measured registered beforehand, to thereby perform quality determination. COPYRIGHT: (C)2007,JPO&INPIT
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