Testing apparatus
US10228411B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2014 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Jul 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit board testing apparatus detects sparking and partial discharge between wiring patterns on a circuit board to determine if the circuit board is defective. A constant current source feeds a constant current to a wiring pattern to be tested. A voltage measurement part measures the resulting voltage at the wiring pattern. A normal state voltage gradient calculation part calculates a voltage gradient in a normal state where there is no sparking or partial discharge. A determination part determines whether the voltage gradient remains invariant, by comparing voltage measurement results within a predetermined range with an estimated value of the voltage based on the voltage gradient in the normal state. The determination part determines whether a circuit board is defective, on the basis of whether the voltage gradient remains invariant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.