Printed circuit board carbon ink resistance test device

Abstract

The invention discloses a printed circuit board carbon ink resistance test device, which comprises a printed circuit board tester and a carbon ink test fixture. Several pairs of probes are arranged on the carbon ink test fixture, and each pair of probes consists of two Probe structure, the position of each pair of probes corresponds to the two ends of the carbon ink strip on the printed circuit board. When the printed circuit board is fixed on the carbon ink test fixture, each pair of probes is respectively The two ends of the strip are in contact, and the program for testing the resistance of carbon ink is installed on the printed circuit board tester. There is a wire connected between the probe and the printed circuit board tester. The printed circuit board carbon ink resistance test device can be automatic and efficient. Test the resistance value of each carbon ink strip, and distinguish the unqualified printed circuit boards. The test time only takes about three seconds, which greatly reduces the measurement time, and the test automation not only saves manpower, but also avoids The influence of human factors makes the test accuracy higher.

Description

technical field [0001] The invention relates to a device for testing the resistance value of carbon ink on a printed circuit board, in particular to a device for testing the resistance value of carbon ink with fast testing speed, accurate testing and labor-saving. Background technique [0002] After the carbon ink on the printed circuit board (PCB) is printed, it is necessary to perform a resistance test on the carbon ink strips to determine whether they are qualified. The usual practice is that the operator uses a multimeter to test the carbon ink strips on the printed circuit board one by one, and the printing There are generally dozens of carbon ink strips on the circuit board. If a board with more than 40 carbon ink strips is tested, a more skilled operator needs to spend four to five minutes testing each board, and then record Download the measured resistance data, and select the maximum and minimum values, and pick out the boards with a resistance difference greater th...

AI Technical Summary

Problems solved by technology

This method of manually using a multimeter to test the resistance of carbon ink is not only slow and labor-intensive, but also the accuracy of the test is easily affected by human factors.

[0003] Aiming at the defect of using a multimeter to test the resistance value of carbon ink manually, some carbon ink resistance test machines specially used for testing the resistance value of carbon ink have appeared on the market. Although it can improve the speed and accuracy of the test and liberate manpower, it increases Equipment investment and equipment cost are high, which in turn increases the production cost of printed circuit board products

[0004] Printed circuit board testing machines are used in the production process of printed circuit boards. The main function of printed circuit board testing machines is to detect and screen out printed circuit boards with defects in electrical performance such as open circuit, short circuit or leakage caused in the production process. , but does not have the function of carbon ink resistance test

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