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Method for detecting penetration points and pinholes of electrolytic copper foil

A technology of electrolytic copper foil and detection method, which is applied in the direction of measuring devices, optical testing flaws/defects, instruments, etc., can solve problems such as unintuitive and obvious effects, and achieve intuitive and clear detection results

Inactive Publication Date: 2012-11-28
东强(连州)铜箔有限公司
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Problems solved by technology

[0004] In order to overcome the shortcomings of the prior art that the effect of water penetration is not intuitive and obvious, and the kerosene permeability detection method affects the recovery and utilization of samples, the purpose of the present invention is to provide a method that is simple to operate, easy to judge and does not affect the recovery and utilization of samples. Detection method of penetration point and pinhole in electrolytic copper foil

Method used

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Embodiment Construction

[0015] The present invention is described in further detail below in conjunction with embodiment.

[0016] A method for detecting penetration points and pinholes of electrolytic copper foil, comprising the steps of:

[0017] (1) Sample processing: select a water tank of 130cm*50cm as the testing water tank, and trim the copper foil to be tested into a sample of 120cm*46cm without wrinkles and creases;

[0018] (2), preparation of permeate: dissolve the dye in alcohol at a concentration of 1g / L, and fill it into the detection tank;

[0019] (3) Rough inspection: Take the sample with the glossy side facing down and put it in a test tank filled with permeate, and place it at a temperature of 20°C for 1 minute. The inspector with a corrected vision of 2.0 observes the color point on the permeate surface , to determine the number and location of penetration points and pinholes;

[0020] (4) Size measurement: Use an electron microscope with a power of not less than 1000 times to f...

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Abstract

The invention relates to an electrolytic copper foil process and discloses a method for detecting penetration points and pinholes of an electrolytic copper foil. The method comprises the following steps: (1) processing a sample, namely selecting a wide water tank as a detection water tank, trimming a copper foil to be detected into a sample without creases, and requiring that the sample can be flatly arranged in the detection water tank; (2) preparing a penetrating fluid, namely dissolving a dye in alcohol at the concentration of 0.5-5g / L, and filling the penetrating fluid in the detection water tank; (3) roughly detecting, namely putting the sample into the detection water tank filled with the penetrating fluid in a way that the smooth surface of the sample faces downwards, keeping for 0.5 to 2 minutes, and observing color points on a penetrated rough surface to judge the number and positions of the penetration points and the pinholes; and (4) measuring the size, namely further detecting corresponding positions of the color points by amplifying through an electron microscope of not less than 1,000 times, and measuring the size of the pinholes. The method has the characteristics of simple operation and simple judgment; and the alcohol used in the method has high volatility, cannot pollute the copper foil and cannot influence the recycle of the sample.

Description

technical field [0001] The invention relates to an electrolytic copper foil process, in particular to a detection method for electrolytic copper foil penetration points and pinholes which is simple to operate, easy to judge and does not affect the recycling of samples. Background technique [0002] Pinholes and penetration points are important factors affecting the performance of copper foil; so-called pinholes are sporadic tiny light-transmitting holes with a diameter of less than 1 mm when the copper foil is tested for light transmission in a dark room; penetration points are opaque However, one side of the copper foil is dyed with a penetrating agent, and staining agent spots appear on the reverse side. Simply put, the pinhole is a straight hole, and the penetration point is a curved hole. For electrolytic copper foil for PCB, pinholes and penetration points have always been a headache for electrolytic copper foil manufacturers in the past. The cause and degree of poros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/91G01B15/00
Inventor 彭小香郭伟
Owner 东强(连州)铜箔有限公司
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