| 摘要 |
PROBLEM TO BE SOLVED: To provide a resistance measuring device and a circuit board inspecting device for measuring resistance values in a short time. SOLUTION: The resistance measuring device using a four terminal method includes: a first current source 210 supplying the first direct current to a through-hole 111; a first voltage meter 310 measuring the first voltage generated at the through-hole 111; a second current source 220 supplying the second direct current to a through-hole 112; a second voltage meter 320 measuring the second voltage generated at the through-hole 112; and a means computing the resistance value of the through-hole 111 from the first direct current and the first voltage and computing the resistance value of the through-hole 112 from the second direct current and the second voltage. The first electric path 201 and the second electric path 202 are closely disposed in parallel, and the first and the second direct currents which have reverse polarity with each other with the same magnitude are made to flow to the electric paths 201, 202 at the same time. COPYRIGHT: (C)2010,JPO&INPIT
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