Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1987-10-09
1989-06-27
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Plural, automatically sequential tests
324 96, 324501, 324158R, 356389, 364481, G01R 1512
Patent
active
048433292
ABSTRACT:
A method for contactlessly testing for opens and shorts in conducting paths within or on a nonconducting substrate. There are a plurality of conducting pads on the surface of the substrate. Charges are contactlessly generated, e.g., by an optical beam, in at least one selected pad inducing a voltage thereon and on pads electrically connected therewith through one of the conducting paths. A two dimensional electron flux is contactlessly caused to be emitted from the selected pad and at least one other pad of the plurality of pads, e.g., by an optical beam. The flux emitted from the pads depends on the voltage on each pad. The flux is detected to distinguish pads in electrical connection.
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Beha Johannes G.
Blacha Armin U.
Clauberg Rolf
Seitz Hugo K.
Edmonds Warren S.
Eisenzopf Reinhard J.
International Business Machines - Corporation
Morris Daniel P.
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