1. Needle bed testing method

This method involves connecting probes with tension springs to each detection point on the circuit board. Does the tension spring make each probe have 100? -A pressure of 200g is applied to ensure excellent contact at each detection point, and such probes are arranged together and are referred to as "probes"; Needle bed;. Under the control of the detection software, the detection points and signals can be programmed, and the tester can obtain information about all the testing points.

2. Observation of circuit board

The circuit board has a small volume and complex structure, so professional observation instruments are also required for the investigation of the circuit board. Generally, we use portable video microscopes to investigate the structure of circuit boards. Through the video microscope camera, we can clearly see the microscopic structure of the circuit board from the microscope, which is very intuitive. Through this method, it is relatively easy for us to design and inspect circuit boards.

3. Dual probe flying probe testing method

The flying pin tester does not rely on pin drawings installed on fixtures or brackets. According to this system, two or more probes are mounted on small magnetic heads that can move freely in the x-y plane, and the test points are determined by CADI? Gerber data is directly manipulated. The dual probes can move within a range of 4mil apart from each other. The probe can move independently and there is no real limit to the degree to which they can approach each other. The tester with two movable arms is based on measuring capacitance. Press the circuit board tightly onto the insulation layer on a metal plate as another metal plate for the capacitor. Assuming there is a short circuit between the lines, the capacitance will be larger than at a certain point.

Article source: Jiangmen PCB Customizationhttp://www.yonghongpcb.com/