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

A kind of cyanide-free chemical immersion gold solution and technology thereof for display panel field

A display panel, chemical immersion gold technology, applied in the metal material coating process, liquid chemical plating, coating, etc., can solve the problems that the reduced gold plating cannot be solved, solder joint black plate, easy to produce deep holes, etc. Achieve the effects of reducing health impacts and safety hazards in the working environment, inhibiting corrosion, and improving quality

Active Publication Date: 2021-09-28
SHENZHEN CHENGGONG CHEM
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While displacing gold plating, it will be accompanied by the dissolution of the base metal. As a result, the metal oxide produced by the dissolution forms a boundary layer between the gold layer and the nickel layer; secondly, once the nickel layer is excessively dissolved or corroded, it is easy to produce deep holes. , thus, when the gold layer is soldered, the local high temperature will easily make the solder joints produce black disks
[0004] However, the current cyanide-free reduction gold plating is mainly done for thick gold above 1 micron. For the problems existing in thin gold immersion gold, reduction gold plating cannot be solved.
For example, the company proposed a cyanide-free chemical gold immersion solution suitable for semiconductors and display panels before this. The patent number is 2020114549236. Kim's problem is still unresolved

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of cyanide-free chemical immersion gold solution and technology thereof for display panel field
  • A kind of cyanide-free chemical immersion gold solution and technology thereof for display panel field
  • A kind of cyanide-free chemical immersion gold solution and technology thereof for display panel field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The cyanide-free chemical immersion gold solution includes the following components:

[0060] Contains components A and B in the following mass concentrations:

[0061] A component includes

[0062]

[0063] Mix the above components uniformly according to the ratio to form A solution;

[0064] Component B includes benzotriazole, hyperbranched polyurethane sulfonate, lignosulfonic acid, β-nicotinamide adenine dinucleotide;

[0065] The volume ratio of solution A and solution B is 9:1, adjust the pH to 7 with sulfuric acid or potassium hydroxide, the balance is water, and form a cyanide-free chemical immersion gold solution after the operating temperature is 50°C.

[0066] The immersion gold solution prepared by using this component, after using the immersion gold method to carry out cyanide-free gold immersion on the display panel, the gold thickness is 0.3 microns; and the crystal size of the obtained immersion gold plate layer is consistent, without voids and crac...

Embodiment 2

[0068] The cyanide-free chemical immersion gold solution includes the following components:

[0069] Contains components A and B in the following mass concentrations:

[0070] A component includes

[0071]

[0072] Mix the above components uniformly according to the ratio to form A solution;

[0073] Component B includes benzotriazole, hyperbranched polyurethane sulfonate, lignosulfonic acid, β-nicotinamide adenine dinucleotide;

[0074] The volume ratio of solution A and solution B is 9:1, adjust the pH to 7 with sulfuric acid or potassium hydroxide, the balance is water, and form a cyanide-free chemical immersion gold solution after the operating temperature is 50°C.

[0075] The immersion gold solution prepared by using this component, after using the immersion gold method to carry out cyanide-free gold immersion on the display panel, the gold thickness is 0.6 microns; and the crystal size of the obtained immersion gold plate layer is consistent, without voids and crac...

Embodiment 3

[0077] The cyanide-free chemical immersion gold solution includes the following components:

[0078] Contains components A and B in the following mass concentrations:

[0079] A component includes

[0080]

[0081]

[0082] Mix the above components uniformly according to the ratio to form A solution;

[0083] Component B includes benzotriazole, hyperbranched polyurethane sulfonate, lignosulfonic acid, β-nicotinamide adenine dinucleotide;

[0084] The volume ratio of solution A and solution B is 9:1, adjust the pH to 8 with sulfuric acid or potassium hydroxide, the balance is water, and form a cyanide-free chemical immersion gold solution after the operating temperature is 50°C.

[0085]Using the immersion gold solution prepared by this component, after using the immersion gold method to carry out cyanide-free gold immersion on the display panel, the gold thickness is 0.9 microns; and the crystal size of the obtained immersion gold plate layer is consistent, without voi...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a cyanide-free chemical gold immersion solution and its process for the field of display panels. It consists of the following components: A component and B component including the following mass concentrations: A component includes: cyanide-free gold salt The content of Au ions is 10-15g / L; complexing agent 20-100g / L; composite reducing agent 0.5-1g / L; anti-aging agent 5-10g / L; surfactant 0.05-0.2g / L; Buffer 30-60g / L; stabilizer 0.2-5mg / L; reaction accelerator 50-80mg / L. Mix the above components uniformly according to the ratio to form A solution; B component includes benzotriazole, hyperbranched polyurethane sulfonate, lignin sulfonic acid, β-nicotinamide adenine dinucleotide; four groups According to the concentration ratio of 1:1:1:1, they are evenly mixed to form B solution; the volume ratio of A solution and B solution is 9:1, and the pH is adjusted to 7‑9 with sulfuric acid or potassium hydroxide, and the balance is water. After the temperature is 50-90°C, a cyanide-free chemical immersion gold solution is formed. The gold plating layer obtained by the invention has good adhesion, uniform plating layer and fast deposition rate.

Description

technical field [0001] The invention relates to the technical field of surface treatment of display panels, in particular to a cyanide-free chemical gold immersion solution used in the field of display panels and a process thereof. Background technique [0002] At present, the electroless gold deposition process is widely used in the display panel industry, and immersion gold on the display panel has become an important part of processing and manufacturing. This is mainly because the gold plating layer can meet various assembly requirements, and has solderability, conductivity, and high stability. performance and oxidation resistance. In my country, chemical immersion gold uses cyanide-containing gold salts as raw materials. Since the cyanide plating solution contains highly toxic cyanide, there will be great unsafe factors in the actual production process and related follow-up wastewater, waste gas treatment and disposal. , making the development of cyanide gold plating sol...

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): C23C18/44
CPCC23C18/44
Inventor 姚玉洪学平
Owner SHENZHEN CHENGGONG CHEM