Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-10-11
1981-10-20
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324158R, G01R 3112, G01R 3126
Patent
active
042963702
ABSTRACT:
A method of detecting the presence of a thin insulating film having a thickness less than about 500 angstroms disposed over a surface of a conductor comprises positioning a conductive grid adjacent the surface of the insulating film. Ions of one type polarity are deposited adjacent the insulating film through openings in the grid, the openings in the grid being sufficiently small to limit the surface charge voltage on the insulating film to less than about 50 volts. After immersing the insulating film in a suspension of charged particles having a polarity opposite to the one type, the deposition of charged particles adjacent the conductor surface then indicates the presence of the insulating film.
REFERENCES:
patent: 3895127 (1975-07-01), Comizzoli
Comizzoli, Robt. B. "Nondestructive, Reverse Decoration . . . in IC Passivation Overcoats", Journal of Electrochemical Society, vol. 124, Jul. 1977, pp. 1087-1095.
Weinberg et al., "Measurement of . . . across a Thin Insulating Film in a Corona Discharge", Review of Scientific Instruments, vol. 46, No. 2, Feb. 1975, pp. 201-203.
Comizzoli Robert B.
Vibronek Robert D.
Cohen Donald S.
Lazar Joseph D.
Morris Birgit E.
RCA Corporation
Strecker Gerard R.
LandOfFree
Method of detecting a thin insulating film over a conductor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of detecting a thin insulating film over a conductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of detecting a thin insulating film over a conductor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1493482