Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of stripping method of silver surface of chemical silver circuit board

A technology for stripping silver circuit boards and silver surfaces, applied in the field of circuit board production, can solve problems such as increased production costs, waste of resources, etc., and achieves the effects of low cost, easy operation, and optimized soaking time.

Active Publication Date: 2016-04-20
SHENGHUA ELECTRONICS HUIYANG
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, in order to avoid the impact on the solder, the circuit board manufacturers use scrap treatment for the silver circuit boards with defects on the silver surface, which leads to increased production costs and a lot of waste of resources.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a method for stripping the silver surface of a silver circuit board, including the following steps:

[0029] a. Use the silver stripping potion that can strip off the silver surface of the silver plate to soak the silver circuit board to be treated, and the silver stripping potion contains KMnO 4 , NaOH, NH 3 ·H 2 0 mixed solution;

[0030] b. Rinse the silver circuit board with clean water;

[0031] c. Remove residual MnO on the silver circuit board 4 2- ;

[0032] d. Clean the silver circuit board and dry it.

[0033] The above silver stripping potion contains 8g KMnO per liter 4 , 10gNaOH and 13.5mL volume percentage is 85%NH 3 ·H 2 0, pH 12.

[0034] The time for soaking the chemical silver circuit board to be treated with the above-mentioned silver stripping solution is 3 minutes, and the treatment temperature is 40°C.

[0035] The above removal of MnO remaining on the silver circuit board 4 2- The method is to use 1% hydrogen ...

Embodiment 2

[0039] This embodiment provides a method for stripping the silver surface of a silver circuit board, including the following steps:

[0040] a. Use the silver stripping potion that can strip off the silver surface of the silver plate to soak the silver circuit board to be treated, and the silver stripping potion contains KMnO 4 , NaOH, NH 3 ·H 2 0 mixed solution;

[0041] b. Rinse the silver circuit board with clean water;

[0042] c. Remove residual MnO on the silver circuit board 4 2- ;

[0043] d. Clean the silver circuit board and dry it.

[0044] The above silver stripping potion contains 9g KMnO per liter 4 , 15gNaOH and 12.5mL volume percentage is 75%NH 3 ·H 2 0, pH 12.

[0045] The time for soaking the chemical silver circuit board to be treated with the above-mentioned silver stripping solution is 2 minutes, and the treatment temperature is 43°C.

[0046] The above removal of MnO remaining on the silver circuit board 4 2- The method is to use 3% hydrogen ...

Embodiment 3

[0050] This embodiment provides a method for stripping the silver surface of a silver circuit board, including the following steps:

[0051] a. use the silver stripping potion that can strip off the silver surface of the silver plate to soak the silver circuit board to be treated, and the silver stripping potion contains KMnO 4 , NaOH, NH 3 ·H 2 0 mixed solution;

[0052] b. Rinse the silver circuit board with clean water;

[0053] c. Remove residual MnO on the silver circuit board 4 2- ;

[0054] d. Clean the silver circuit board and dry it.

[0055] The above silver stripping potion contains 12g KMnO per liter 4 , 28gNaOH and 13mL volume percentage is 93%NH 3 ·H 2 0, pH 13.

[0056] The time for soaking the silver circuit board to be treated with the above-mentioned silver stripping solution is 3 minutes, and the temperature is 35°C.

[0057] The above removal of MnO remaining on the silver circuit board 4 2- The method is to use hydrogen peroxide with a mass fr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for stripping a silver surface of a silver removing circuit board, which comprises the following processes of a, soaking the silver removing circuit board to be processed by using silver stripping medicinal liquid capable of stripping the silver surface of the silver removing board, wherein the silver stripping medicinal liquid is mixed solution comprising KMnO4, NaOH and NH3.H2O; b, flushing the silver removing circuit board with clear water; c, removing residual MnO42- on the silver removing circuit board; and d, cleaning and drying the silver removing circuit board. According to the invention, the mixed solution of KMnO4, NaOH and NH3.H2O is used as the silver stripping medicinal liquid; the silver surface of the defective silver removing circuit board is stripped in a soaking manner; silver stripping efficiency is high; the silver stripping process is mild and no damage to the circuit board is caused; the method is simple and convenient to operate and is low in cost; recovery of the defective silver removing circuit board is implemented; and the method is beneficial for saving energy and reducing emission.

Description

technical field [0001] The invention relates to the field of circuit board production, in particular to a method for stripping the silver surface of a silver circuit board. Background technique [0002] Huayin circuit board has the advantages of high efficiency, energy saving, environmental protection, high thermal conductivity, etc., and adopts lead-free production process, which has been favored by circuit board users, and has been listed as a key high-tech circuit board product protected and supported by the state. At present, the chemical silver circuit board industry is in the initial stage of industry development, with huge market potential and economic benefits, but the circuit board manufacturing industry has not yet mastered the chemical silver circuit board manufacturing technology, and there are various technical defects in many processes, resulting in existing The yield rate of silver circuit boards is low and the quality stability is poor. In the production pro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/22
Inventor 周定忠
Owner SHENGHUA ELECTRONICS HUIYANG