A test probe works in a test fixture board mating a installed probe receptacle. The probe will contact the component on the PCB by compressed to a working travel, then the contact will keep the PCB signal go from probe to the terminal installed in Receiver board.
According to components differeciation, fixture designer could select relative probe tips to match test points, here is where you could refer to how to select a probe tip Tips-Selection.
In fact, a probe was made to contact a lead to contact bumps, dips and via holes to check PCB line open or short which was judged by the test fixture on Agilent ICT tester. Largely applicated probes on test fixtures to check the print circuit boards of desktop, notebook and server in EMS ( Electronics Manufacturing Service) industries.
There are not only the probes on fixture, and the mated sockets or
receptacles were tightly installed on the fixture board to keep a straight plug-in,
and these receptacles are wrapped the wires to contact the terminals on the
interface board, this is a systematic framework. The receptacle fits tightly
with probe. Operators can maintain the probes by pulling out the useless probes,
this will keep the test fixture a long life and save a lot.
With
the development of test, Pads become much smaller and higher density than
before. So, it requires higher precision for probes and receptacles.
How Does A Test Probe Work
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