Many test engineers focus on the Contact Resistance is to keep the test line stable and fast transmitting.
What will contribute to the Contact Resistance of a test probe?
As former probe definition essay said, a probe is composed of plungers, barrel and spring.
Let's have a detailed concept of the resistance of a contact probe.
We always confound the contact resistance with mechanical resistance, even with impedance.
It namely equals to probe resistance itself, only based on materials, length, cross-area etc.
But Contact Resistance is not a mechanical resistance but included, furthermore, it is not the original resistance, let see the contact resistance for a double-ended probe and ICT probe.
So, we should focus on more about a probe making, a good process will help a lot to reduce the resistance.
Sometimes contact resistance is a key to test, like high speed.
Focus more, keep you flux off.
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