A testing device for a printed circuit includes a plate which is at least partly constituted by semiconducting material, and sensing elements for the transmission of testing signals between the testing device and the printed circuit. The sensing elements may be in the form of projections or coils integral...http://www.google.com.au/patents/US5625297?utm_source=gb-gplus-sharePatent US5625297 - Testing device for testing electrical or electronic test specimens
