We tell you how the test probe works?

　　Now in the test fixture, the probe is used as a medium, the probe is placed in the casing, the probe head contacts the object to be tested, and the lead wire of the casing at the other end conducts the signal, and the received signal is processed in the tester For example, the resistor uses a current source to calculate the voltage drop across the probe, and the capacitor uses a constant voltage source to calculate the slope of the charging time at different frequencies. When the probe is made into a fixture, it can be used continuously, and the cost is not high, so he It has been widely used in the testing community.

　　The probe head type is divided into various types mainly because different test points require different head types, such as dip feet use multi-claw head type, test pad points use pointed, round or flat heads, IC pins use plum blossom heads The shape, etc. are all selected by experienced production personnel according to the parts on the finished PCB.

　　Nanometering is only the strengthening of materials for the probe, and there is no impact on the test fixture. If you are interested, the impact on the test fixture should be part of the test instrument, such as AOI detection.

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