Crouzet

Jacques Saroul

Robert Morille

The device according to the invention is intended for controlling the electrical continuity of the equipotential branchings of multi-layer printed circuits. It comprises selectors of a model of printed circuit to be controlled in order to effect, by superposition with the latter, the selection from the assembly E of the conductor elements accessible on at least one of the outer faces of the circuit, of two distinct sub-assemblies Ei and Ec, such that E=Ei+Ec; means for scanning said selectors in order to effect, by displacements in contact with the latter, detection of the defects in continuity; and indicators for translating the state of the electrical continuity in the branchings.

Device for controlling continuity of printed circuits

The present invention relates to devices for the quality control of the electrical insulation of printed circuits made in particular in multiple layers superposed on insulating supports of laminar structure by means of conventional or hybrid technologies. To this end, the testing device according to the invention essentially comprises: a specific sensor circuit constituted by a supple insulating screen comprising a plurality of conducting studs with one and only one stud for each conductive printed circuit path; a scanning circuit associated with said sensor circuit comprising a metallized insulating layer having at least two coplanar conducting zones insulated by at least one transverse electrical discontinuity; a measuring apparatus indicative of the galvanic insulation existing between two contiguous conducting zones of said scanning circuit. The testing is performed by moving the scanning circuit and detecting for a short between two intentionally separate conductive printed circuit paths which would close the circuit between the two conducting zones of the scanning circuit.

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Valence, France

Jacques Saroul