Method for the detection of the presence of passivation in an in

Details Method for the detection of the presence of passivation in an in Method for the detection of the presence of passivation in an in

1996-10-23

1999-04-06

Nguyen, Vinh P.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

G01R 3128

Patent

active

058923691

ABSTRACT:
A method for detecting the presence of a passivation layer on an integrated circuit comprises sending out a train of pulses of different widths at one end of a line of metal that winds on the surface of the integrated circuit beneath the protection layer of the integrated circuit. The line of metal and the dielectric layer of the integrated circuit form an RC filter. The number of pulses received at the other end of the line of metal is counted and compared with at least one characteristic reference value of the filter.

REFERENCES:
patent: 4434361 (1984-02-01), Meinguss et al.
patent: 4703260 (1987-10-01), Beha et al.
patent: 4814849 (1989-03-01), Schrenk
French Search Report from French Patent Application No. 95 12659, filed Oct. 26, 1995.

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