Rapid detection method for nickel corrosion of immersion gold lines

A detection method, nickel corrosion technology, applied in weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problem that the timeliness of detection results cannot be guaranteed, nickel corrosion cannot be discovered in time, and property loss of production units and other issues to achieve the effect of avoiding batch abnormality and scrapping, avoiding batch abnormality, and simple and straightforward detection

Inactive Publication Date: 2019-10-11
重庆科迈电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a rapid detection method for nickel corrosion of the gold wire, which has the advantages of rapid detection and solves the problem that there is no EDS or SEM detection instrument in the general factory, and the detection can only be done externally, and the outgoing cycle generally requires The results are available in 2 days, so the timeliness of the test results cannot be guaranteed, resulting in nickel corrosion not being discovered in time, which is likely to cause abnormal batch scrapping and cause a large amount of property loss to the production unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The rapid detection method for nickel corrosion of gold-plated wire comprises the following steps:

[0019] Prepare tools, prepare a 15*10cm bare copper test plate, a 200ml beaker, a 150ml nitric acid solution with a concentration of 30%, a stopwatch timer, a tweezers and a nickel tank;

[0020] 2) Preparation, put a 15*10cm bare copper test plate into the nickel tank, and make it according to the normal parameters of the gold, and pour 150ml of nitric acid solution with a concentration of 30% into a 200ml beaker for later use;

[0021] 3) For detection work, take the completed 15*10cm bare copper test plate out of the nickel tank and immediately put it into a 200ml beaker filled with 150ml of 30% nitric acid solution, and use a stopwatch timer for 25 seconds Finally, use tweezers to take it out and visually observe whether there is corrosion or blackening on the nickel surface, and the corrosion resistance time shall not be less than 25s;

[0022] 4) Judging criteria,...

Embodiment 2

[0024] The rapid detection method for nickel corrosion of gold-plated wire comprises the following steps:

[0025] Prepare tools, prepare a 15*10cm bare copper test plate, a 200ml beaker, a 150ml nitric acid solution with a concentration of 50%, a stopwatch timer, a tweezers and a nickel tank;

[0026] 2) Preparation, put a 15*10cm bare copper test plate into the nickel tank, and make it according to the normal parameters of the gold plating, and pour 150ml of 50% nitric acid solution into a 200ml beaker for later use;

[0027] 3) For detection work, take the finished 15*10cm bare copper test plate out of the nickel tank and immediately put it into a 200ml beaker filled with 150ml of 50% nitric acid solution, and use a stopwatch timer for 15 seconds Finally, use tweezers to take it out and visually observe whether there is corrosion or blackening on the nickel surface, and the corrosion resistance time shall not be less than 15s;

[0028] 4) Judging criteria, the failure rate...

Embodiment 3

[0030] The rapid detection method for nickel corrosion of gold-plated wire comprises the following steps:

[0031] Prepare tools, prepare a 15*10cm bare copper test plate, a 200ml beaker, a 150ml nitric acid solution with a concentration of 40%, a stopwatch timer, a tweezers and a nickel tank;

[0032] 2) Preparation, put a 15*10cm bare copper test plate into the nickel tank, and make it according to the normal parameters of the gold, and pour 150ml of nitric acid solution with a concentration of 40% into a 200ml beaker for later use;

[0033] 3) For detection work, take the finished 15*10cm bare copper test plate out of the nickel tank and immediately put it into a 200ml beaker filled with 150ml of 40% nitric acid solution, and use a stopwatch timer for 20 seconds Finally, use tweezers to take it out and visually observe whether there is corrosion or blackening on the nickel surface, and the corrosion resistance time shall not be less than 20s;

[0034] 4) Judging criteria, ...

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PUM

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Abstract

The invention relates to the technical field of nickel corrosion detection of gold lines, and discloses a rapid detection method for nickel corrosion of immersion gold lines. The rapid detection method comprises the following steps: 1) preparation of tools, 2) preparation, 3) inspection, and 4) evaluation criteria. In the rapid detection method for nickel corrosion of immersion gold lines, tools including a 15*10cm bare copper test board, a 200ml beaker, a 150ml of nitric acid solution with 40% concentration, a stopwatch timer and a nickel tank are prepared, so that the nickel corrosion of immersion gold lines can be conveniently achieved by the simple tools, effectively controlling detection cost. The detection method can be adopted by small and medium-sized production units, improving the practicability of the method. By putting the test board into the 200ml beaker containing the 150ml of nitric acid solution with 40% concentration for 20s, the detection time is effectively reduced.The nitric acid solution with 40% concentration effectively controls corrosion intensity, avoids excessive intensity, resulting in rapid damage of the test board and inaccurate results.

Description

technical field [0001] The invention relates to the technical field of nickel corrosion detection of chemical gold wires, in particular to a rapid detection method for nickel corrosion of chemical gold wires. Background technique [0002] Electroless gold wire nickel is also called chemical nickel gold, immersion nickel gold or electroless nickel gold. Electroless nickel gold replaces palladium on the surface of copper through a chemical reaction and then electrolessly coats a layer of nickel-phosphorus alloy on the basis of the palladium core, and then Then, a layer of gold is plated on the surface of the nickel through a displacement reaction. At present, the immersion gold of nickel gold has two processes of displacement and semi-replacement and semi-reduction mixed bath building. Electroless nickel gold is mainly used for surface treatment of circuit boards to prevent The copper on the surface of the circuit board is oxidized or corroded, and is used for soldering and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/006
Inventor 张天飞
Owner 重庆科迈电子科技有限公司
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