Apparatus for the electrical function testing of wiring matrices, particularly of printed circuit boards
US5148102A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Oct 10, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2805
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing, for example, printed circuit boards having measuring locations connected by interconnects in which some of the measuring locations are closely spaced, includes a carrier plate having an arrangement of gas discharge channels each provided with an electrode for separate ionic contact with the more widely space measuring locations. The more closely space measuring locations are ionically contacted by a group gas discharge channel having a group electrode which extends over a group of the closely space measuring locations. The group gas discharge channel in one embodiment is an oblong hole in the carrier plate with a wire extending along its length. Current flow and voltage via the ionic contact is measured to identify faults in the interconnects between the measuring locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.