Contact probe arrangement for electrically connecting a test sys

Details Contact probe arrangement for electrically connecting a test sys Contact probe arrangement for electrically connecting a test sys

1988-03-14

1989-06-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158F, 324 73PC, 324 725, G01R 1073, G01R 1067

Patent

active

048433152

ABSTRACT:
The contact probe arrangement includes a stack of perforated plates (1, 1a) through which extend a plurality contact probes. The stack of perforated plates consists of two kinds of plates. The first kind forms the lowermost plates (1a). They have circular or square holes permitting a vertical placing of the contact probes onto the contact pads (4) of the device (5) to be tested. The plates (1) of the second kind have oblong, rectangular, square, circular, elliptical or trapezoidal holes (3). With respect to the stacked plates of the second kind, alternate ones are offset against the two other adjacent plates which are aligned relative to each other, in such a manner that each contact probe is surrounded by part of the lower edge of the upper of two adjacent perforated plates, and part of the upper edge of the lower of two adjacent perforated plates. If axial stress is applied, the contact probe can thus not buckle any farther than to a part of the perforation wall limiting its maximum buckling. This ensures a sufficiently low contact resistance between the contact probe and the contact pad of the device to be tested. By using a corresponding number of perforated plates of the second kind the contact probes can adapt to height differences of the contact pads caused by irregularities in the surface of the device to be tested.

REFERENCES:
patent: 3904934 (1975-09-01), Martin
patent: 3941442 (1976-03-01), Friend
patent: 4027935 (1977-06-01), Byrnes et al.
patent: 4622514 (1986-11-01), Lewis

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