Patent ID: 7301354
Filing Date: 2007-11-27
Classification: G01R

Abstract:
1. A testing head comprising: an upper die having a plurality of guide holes; a lower die having a plurality of guide holes; and a plurality of contact probes inserted in the guide holes of the upper and lower dies, wherein the contact probes comprise a rod-shaped body equipped at an end with a contact tip effective to ensure mechanical and electrical contact with a corresponding contact pad of an integrated electronic device to be tested, the rod-shaped body having a non-uniform cross section, wherein the upper die has cross sectional holes having a profile corresponding to the union of profiles of different cross sections of the contact probes, wherein the rod-shaped body has a first portion and a second portion with respective first and second cross sections of different profile, wherein the first cross section is taken orthogonally with respect to a first central axis through the first portion and the second cross section is taken orthogonally with respect to a second central axis through the second portion.