Method and device for online testing of voltage withstanding performance of copper-clad plate

Abstract

The invention provides a method and a device for online testing of the voltage withstanding performance of a copper-clad plate. The method for online testing of the voltage withstanding performance of a copper-clad plate comprises the steps of: (1) setting the parameters of a voltage withstanding test, and starting the testing device; (2) conveying the copper-clad plate to a vacuum cavity for accommodating a test electrode, and vacuumizing the vacuum cavity; (3) when the test device reaches a set value, adopting the test electrode to carry out a voltage withstanding performance test on the copper-clad plate under a vacuum condition; and (4) if the copper-clad plate is not broken down under the set value, determining that the voltage withstanding performance is qualified, otherwise, determining that the voltage withstanding performance is unqualified, and classifying the qualified copper-clad plate and the unqualified copper-clad plate. Compared with the prior art, in the method for online testing of the voltage withstanding performance of a copper-clad plate, a test is carried out under the vacuum condition without air, so that the condition of air breakdown at the edge of the copper-clad plate cannot occur in the test process, the nondestructive test of the copper-clad plate can be realized, misjudgment caused by air breakdown at the edge can be reduced, and the test efficiency is high.

Description

technical field [0001] The invention relates to the field of instrument testing, in particular to performance testing of copper clad laminates, and more particularly to a method and device for on-line testing of the withstand voltage performance of copper clad laminates. Background technique [0002] Electrical safety performance is an important parameter that reflects the safety performance of electronic products and equipment. The main test indicators of the electrical safety performance of the whole machine include withstand voltage, insulation resistance, leakage current, grounding resistance, etc. Among them, the withstand voltage test is familiar to everyone and is used in product safety testing. One of the most used. As the ground of circuit boards and the carrier of electronic components, copper clad laminates are used in various electrical equipment and electrical appliances, so the voltage resistance performance is one of the key properties of copper clad laminates...

AI Technical Summary

Problems solved by technology

At present, CCL manufacturers in the industry usually use manual sampling and local testing methods for CCL withstand voltage testing. First, it is necessary to sample the entire CCL material, prepare samples, and then use the high-voltage tester in the laboratory for pressure testing. Now Some local sampling methods cannot represent the withstand voltage performance of the entire large board, let alone the withstand voltage performance of all large boards in the entire batch of orders

In addition, with the rapid development of science and technology and people's pursuit of light, thin, short and small electronic equipment, the interconnection density of electronic circuits has increased tens of thousands of times than before, and the volume is still shrinking. The requirements for voltage performance will become higher and higher, and the existing detection methods of manual sampling and local testing can no longer meet the requirements of downstream customers.

Therefore, the demand for on-line testing of the withstand voltage performance of copper-clad laminates is becoming more and more urgent. However, when the copper-clad laminates are subjected to withstand voltage tests, the edges of the copper-clad laminates are prone to breakdown due to air and arcs occur, which will cause black spot defects and strips on the edges of the copper-clad laminates. to misjudge

The current practice in the industry is to tear apart the edge copper foil and increase the distance between the two sides of the copper for withstand voltage testing. However, this test is very inefficient and the operation is complicated and cannot be automated.

Therefore, there is currently no mature method in the CCL industry for online withstand voltage testing of CCL

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