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Novel ferric trichloride etching solution

A technology of plate ferric chloride etching and acidic ferric chloride etching, which is applied in the field of chemical mixture solution for acid etching copper, can solve the problems of unstable etching speed, rapid decline of etching speed and high etching rate of the old technology, and achieve High-quality etching process, improved etching quality, and high-quality etching effect

Inactive Publication Date: 2016-08-24
叶涛
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Problems solved by technology

Ferric chloride is the main raw material of the traditional circuit board etching process. Although it has strong copper-dissolving ability and low cost, the etching speed drops rapidly. Therefore, most of the current circuit board production industries use acidic copper chloride etching system.
It not only has the characteristics of low cost and high etching rate of traditional ferric chloride etching solution, but also solves the problem of unstable etching rate of the old process

Method used

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  • Novel ferric trichloride etching solution

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Embodiment Construction

[0023] specific implementation plan

[0024] 1. Select a circuit board spray etching production line with an automatic detection feeding controller with a pH meter and a hydrometer.

[0025] 2. After calibrating the process parameters of the etching production line controller, set the specific gravity feeding data to 1.330g / ml, and add the sub-liquid (that is, the new ferric chloride etching solution) into the etching solution working cylinder through the specific gravity feeding controller .

[0026] 3. After the above steps are completed, pour the new ferric chloride etching solution into the etching cylinder of the production line, then heat and spray and put copper plates to make the etching working mother solution.

[0027] 4. When the temperature of the working fluid is 48-50°C, the pH value is 1.1-1.4M, and the specific gravity is 1.330g / ml, the circuit board can be put into etching production after adjusting the board speed and other process parameters according to th...

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Abstract

A novel ferric trichloride etching solution of the invention is a novel monad liquid etching technical product based on a traditional [ferric trichloride + hydrochloric acid] etching system and with acidic copper chloride etching as the leading factor. By combining advantages of two copper etching oxidants ferric trichloride and copper chloride, etching rate is stabilized and etching quality is enhanced. Production cost is reduced, and the environmental protection problem generated by an acidic copper chloride and oxidizing agent etching technology widely applied nowadays is overcome.

Description

technical field [0001] The invention relates to a chemical mixed liquid used for acid etching copper in the process of making printed circuit boards. Background technique [0002] Due to the rapid development of electronic technology, the demand for electronic circuit boards, as one of the basic components of modern electronic products, is also increasing. Therefore, a high and stable etching rate has become one of the important conditions for the selection of etching solutions in the electronic circuit board production industry. Ferric chloride is the main raw material of the traditional circuit board etching process. Although it has strong copper-dissolving ability and low cost, the etching speed drops rapidly. Therefore, most of the current circuit board production industries use acidic copper chloride etching system. The novel ferric chloride etching solution of the invention improves the traditional ferric chloride etching process. It not only has the characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/18
Inventor 叶涛
Owner 叶涛
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