Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1985-09-23
1987-10-27
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 73R, G01R 3128
Patent
active
047032600
ABSTRACT:
Contactless probing of an integrating circuit is carried out by flooding the surface of the integrated circuit with pulsed ultraviolet laser light, causing photoelectron emission as a function of the potentials at micropoints on the integrated circuit, converting this two-dimensional electron pattern into a corresponding relatively long duration pattern of luminescence by a luminescent target, and reviewing the result by video/computer scanning. Separate embodiments allow testing either in vacuum or in air, with or without insulating passivation layers present on the chip. The result is a contactless oscilloscope which monitors instantaneous voltage (logic states and AC switching waveforms) for a full two-dimensional array of micropoints simultaneously. A chip with test points and appropriate windows for laser activation and luminescent targeting can be specially designed for optimal testing.
REFERENCES:
patent: 4588950 (1986-05-01), Henley
Beha Johannes G.
Dreyfus Russell W.
Kash Jeffrey A.
Rubloff Gary W.
International Business Machines - Corporation
Karlsen Ernest F.
Kling Carl C.
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