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Judgment Method for Anode Leakage Failure of Glass Fiber Bundle

A judging method and technology of glass fiber bundles, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of the decrease of the initial resistance value of the detection resistance, the failure of leakage current, and the reduction of the effectiveness and accuracy of the anode leakage experiment of glass fiber bundles and other problems to achieve the effect of eliminating misjudgment, improving accuracy, and eliminating inherent pollution

Active Publication Date: 2016-01-20
NEW FOUNDER HLDG DEV LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] After the glass fiber bundle anode leakage test, the test sample will usually undergo discoloration, corrosion, etc., which will have a great impact on the resistance value between the sampling points after the experiment, and may cause a large change in the resistance value; at the same time , some non-CAF factors, such as the contamination of the selected test points, may also cause the detection resistance value between the sampling points after the experiment to be greatly reduced compared with the initial resistance value. If the resistance value is greatly reduced, it is determined that the anode leakage failure of the glass fiber bundle occurs, and the test sample may be misjudged as the anode leakage failure of the glass fiber bundle due to non-CAF factors, thereby reducing the anode leakage failure of the glass fiber bundle. Experimental Validity and Accuracy
In the prior art, there is no good way to solve the above problems

Method used

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  • Judgment Method for Anode Leakage Failure of Glass Fiber Bundle
  • Judgment Method for Anode Leakage Failure of Glass Fiber Bundle
  • Judgment Method for Anode Leakage Failure of Glass Fiber Bundle

Examples

Experimental program
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Embodiment 1

[0037] Such as image 3 As shown, the method for judging the anode leakage failure of glass fiber bundles provided by the present invention can effectively eliminate most of the anode leakage failures of glass fiber bundles caused by non-CAF factors, specifically as follows:

[0038] Step S1: Carry out the glass fiber bundle anode leakage test on the test sample, and after the experiment, measure the first detection resistance value between the selected sampling points on the test sample, if the first detection resistance value and the selected sampling point When the ratio of the initial resistance is within the first threshold range, a surface inspection is performed on the test sample / between the test points on the test sample, and the pollutants on the test hole chain found after the surface inspection are removed. Wherein, in step S1, the ratio of each detection resistance value between the sampling points on the test sample to the initial resistance value is within the f...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is that the determination method in this embodiment only includes step S1, step S2 and step S3, but does not include step S4.

[0058] In step S3, use deionized water to clean the entire test sample for the first time, then use a compressed air gun to dry the entire test sample, and measure the third detection between the two sampling points after the first cleaning of the test sample Resistance.

[0059] In this embodiment, the third detection resistance value between the sampling points after the first cleaning is about 8.9E+9 ohms. The ratio of the resistance value to the initial resistance value is within the second threshold range (that is, the two change within the same power range of 10), indicating that liquid pollutants have affected the resistance value change between the two sampling points, so it is determined that there is no CAF failure phenomenon occurs, the processing and measurement are terminated...

Embodiment 3

[0062] The difference between this embodiment and Embodiment 1 is that the determination method in this embodiment only includes step S1 and step S2, but does not include step S3 and step S4.

[0063] In step S2, the second detection resistance value between the sampling points on the test sample after the pollutants are removed is measured, and the second detection resistance value is compared with the initial resistance value to determine whether the test sample has glass fiber Bundle anode leakage failure phenomenon: If the ratio of the second detection resistance value to the initial resistance value is within the second threshold range, it is judged that the test sample has no glass fiber bundle anode leakage failure phenomenon; if the ratio of the second detection resistance value to the initial resistance value If the ratio is within the first threshold range, it is judged that the glass fiber bundle anode leakage failure has occurred in the test sample.

[0064] Other ...

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Abstract

The invention provides a method for judging glass fiber bundle anode leakage and failure, which comprises the following steps of: S1, carrying out a glass fiber bundle anode leakage experiment on a test sample, measuring to acquire a resistance value between selected sampling points on the test sample after the experiment, carrying out surface inspection on a part between the test points if the order of magnitude of decreasing amplitude between the resistance value and an initial resistance value is (10<1>, 10<7>), and clearing away pollutants discovered on a test hole chain through the surface inspection; and S2, detecting the resistance value between the sampling points after the pollutants are cleared away, comparing the resistance value with the initial resistance value so as to judge whether a phenomenon of glass fiber bundle anode leakage and failure occurs or not in the test sample. The method provided by the invention can effectively eliminate misjudgments caused by non CAF factors in the glass fiber bundle anode leakage experiment, and improves the accuracy of results of the glass fiber bundle anode leakage experiment.

Description

technical field [0001] The invention belongs to the technical field of PCB production, and relates to a method for judging the performance of a PCB, in particular to a method for judging a glass fiber bundle anode leakage failure. Background technique [0002] Glass fiber cloth is the main base material of multi-layer copper-clad laminates in the PCB industry at present, and has a wide range of applications. Together with resin, it constitutes the main component of the non-conductor in the PCB board. Glass fiber cloth is mainly woven from glass fiber bundles. After the glass fiber bundles are calcined from silica sand and other raw materials into a liquid state, they are drawn into extremely fine glass fibers through a very small alloy nozzle, and then hundreds of glass fibers are twisted. [0003] In the process of PCB processing, the plated hole process is carried out after the drilling process is completed on the second-order multi-layer board. The purpose is to metallize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 张蕾
Owner NEW FOUNDER HLDG DEV LLC