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Cleaning process for preparing pcb substrate for led

A process and substrate technology, which is applied in the field of cleaning process for preparing PCB substrates for LEDs, can solve problems that affect the service life of products, product operation stability, etc., and achieve the effect of ensuring cleanliness

Inactive Publication Date: 2018-03-06
滁州市嘉固商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, the cleanliness of the PCB circuit board surface has an important impact on the assembly of electronic components. Although it will not have a serious impact on the use of the product, the effect of the assembly process will affect the quality of the product in the long run. Service life or the operational stability of a product under extreme conditions

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  • Cleaning process for preparing pcb substrate for led
  • Cleaning process for preparing pcb substrate for led
  • Cleaning process for preparing pcb substrate for led

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0020] This case proposes an embodiment of the cleaning process for preparing PCB substrates for LEDs, which includes the following steps in turn: 1) washing with salt solution; 2) washing with acid solution; 3) washing with alkaline solution; 4) washing with deionized water; Burning; 6) hot air drying; 7) cold air cooling; wherein,

[0021] Salt solution comprises the following materials by weight:

[0022]

[0023] The salt solution is mainly used to remove some salt-soluble impurities, but the formula of the salt solution should be limited, because the unsuitable salt solution itself will also cause corrosion to the etched lines on the surface of the PCB board. The time of salt washing is not limited, preferably 3 to 10 minutes.

[0024] The acid solution comprises the followin...

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PUM

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Abstract

The invention relates to a cleaning technology of a PCB substrate used for preparing LED. The cleaning technology comprises washing by a salt solution, washing by an acid solution, washing by an alkali liquor, washing by a de-ionized water, burning by UV, drying by hot air and cooling by cold air. The salt solution comprises by 5-10 parts of lithium chloride, 5-10 parts of potassium nitrate, 2-3 parts of copper sulphate and 100 parts of water by weight. The acid solution comprises 3-5 parts of citric acid, 3-5 parts of cinnamic acid 2-3 parts of phosphoric acid and 100 parts of water by weight.. The alkali liquor comprises 3-5 parts of sodium bicarbonate, 3-5 parts of cyclohexylamine, 2-3 parts of pyridine and 100 parts of tetrahydrofuran by weight. The PCB substrate which is not pre-processed is cleaned via the brand new washing solution formula, impurities at the surface are comprehensively cleaned by salt washing, pickling, alkali washing and UV burning, and the cleaning technology can effectively ensure the cleanliness factor of a circuit board based on that an original circuit structure at the surface of the PCB is not damaged.

Description

technical field [0001] The invention relates to a pretreatment process for PCB circuit boards, in particular to a cleaning process for preparing PCB substrates for LEDs. Background technique [0002] In the prior art, when assembling LEDs, the pretreatment of the PCB substrate is too simple. Usually, it is judged by visual inspection whether there is dust or impurities on the surface, or it is only purged by simple gas, and the cleaning of the surface is very rough. But in fact, the cleanliness of the PCB circuit board surface has an important impact on the assembly of electronic components. Although it will not have a serious impact on the use of the product, the effect of the assembly process will affect the quality of the product in the long run. Service life or the operational stability of a product under extreme conditions. Therefore, it is very meaningful for the entire assembly process to remove impurities on the surface of the PCB substrate as much as possible and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/26
CPCH05K3/26H05K2203/0786H05K2203/0789H05K2203/0793
Inventor 董佳瑜董春保
Owner 滁州市嘉固商贸有限公司