Four Point Probe Fixture
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
This hand-held fixture allows non-destructive four-point probing of fragile additively-plated copper circuit lines on printed circuit cards and boards. Contacting the line is simplified since the fixture uses a matrix probe that allows four-point contacting to be accomplished with a two-point geometry. In using a matrix probe, the total contact surface area is increased, thereby significantly reducing the average stress under the probe and the resultant stress gradient in the surrounding copper line for a given force as compared to a standard instrumentation probe.