Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Special solder resist green paint stripper for halogen-free pcb board and its preparation method and application

A PCB board and anti-soldering technology, which is applied in the field of special solder-resisting green paint stripper for halogen-free PCB boards and its preparation, can solve the problems of poor removal effect of polymer residues, poor alkali resistance of halogen-free PCB boards, high Molecular pollutants are difficult to deal with, so that it is not easy to reveal the texture, not easy to damage the copper surface, and the effect of dissolution and removal is good.

Active Publication Date: 2022-03-15
上海富柏化工有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its essence is a mixed inorganic alkali aqueous solution, although the swelling and removal efficiency of the solder resist green paint has been improved to a certain extent, but the following problems still exist: 1. Removal of polymer residues generated during the solder resist green paint stripping process The effect is not good, which makes it difficult to deal with the polymer pollutants adhered in the processing tank after stripping the green paint; 2. The copper surface of the PCB board is prone to blackening after soaking in high-concentration lye; 3. Halogen-free PCB board Poor alkali resistance, use the above-mentioned scavenger to strip off the solder resist green paint on the halogen-free PCB board, once the process is not properly controlled, it is easy to cause white spots and textures to appear

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
  • Special solder resist green paint stripper for halogen-free pcb board and its preparation method and application
  • Special solder resist green paint stripper for halogen-free pcb board and its preparation method and application
  • Special solder resist green paint stripper for halogen-free pcb board and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0039] Embodiments 1-6 all relate to a special solder resist green paint stripper for halogen-free PCB boards, and its raw material composition is shown in Table 1 in terms of mass percentage:

[0040] Table 1.

[0041]

[0042] During preparation, weigh each component according to the ratio in Table 1, mix, and stir evenly to obtain the special solder resist green paint stripper for halogen-free PCB boards.

[0043] When stripping the solder resist green paint for halogen-free PCB boards, weigh an appropriate amount of prepared stripping agent and add it to the liquid tank, and heat it up to 75-85°C. Then, dip the PCB board into the stripper, so that the green paint on the PCB can be stripped evenly by the stripper. Depending on the type of PCB board, the thickness of the surface green paint, etc., the soaking time is different. Generally, the pre-examination board can be soaked for 15-30 minutes to peel off the solder-proof green paint, and soaked for 30-50 minutes will ...

Embodiment 6-10

[0045] Embodiments 6-10 all relate to a special solder resist green paint stripper for halogen-free PCB boards, all based on Embodiment 2, and the only difference from Embodiment 2 is that the types of organic bases selected are different, by mass percentage Content meter embodiment 6-10 raw material composition is as shown in table 2:

[0046] Table 2.

[0047]

Embodiment 11-15

[0049] Embodiments 11-15 all relate to a special solder resist green paint stripper for halogen-free PCB boards, all based on Embodiment 2, and the only difference from Embodiment 2 is: the selected organic solvent and the amount of the organic solvent are different, The raw material composition of embodiment 11-15 is as shown in table 3 by mass percentage content:

[0050] table 3.

[0051]

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 special solder resist green paint stripper for halogen-free PCB boards. The main point of the technical scheme is to include the following components in terms of mass percentage: organic base 20-30wt%, organic solvent 3-8wt%, surface Active agent 0.1-1.0wt%, copper protecting agent 0.1-1.0wt%, balance water. The special anti-soldering green paint for halogen-free PCB boards of the present invention has a good stripping effect, is suitable for stripping off various types of anti-soldering green paints for PCB boards, and is especially excellent for stripping off the green anti-soldering paints for halogen-free PCB boards , using it to remove the solder resist green paint is not easy to show texture and white spots, and the copper surface of the PCB board after treatment is not damaged or blackened, which greatly improves the rework efficiency of the halogen-free PCB board solder resist green paint stripping The yield rate is high, and there is no obvious solid residue in the waste liquid after treatment, and there is no obvious residue attached to the inner wall of the liquid tank, which greatly reduces the cleaning and maintenance cost of production equipment. The invention also correspondingly discloses a preparation method and application of a special solder resist green paint stripper for halogen-free PCB boards.

Description

technical field [0001] The invention belongs to the technical field of solder resist green paint strippers for printed circuit boards, and more specifically relates to a special solder resist green paint stripper for halogen-free PCB boards and its preparation method and application. Background technique [0002] Halogen refers to the seventh group (VIIA) non-metallic elements in the periodic table: fluorine (Fluorine), chlorine (Chlorine), bromine (Bromine), iodine (Iodine) and astatine (Astatine) five elements, collectively referred to as halogen. These halogen elements are often used in plastic additives, flame retardants, and organic solvents for industrial products such as cable sheaths, PCBs, electrical casings, and coatings. For example, adding a small amount of halogen-containing flame retardants to PCB substrates or solder resist green paints , It can greatly improve the flame retardancy level of PCB. This kind of PCB containing halogen is called halogen PCB. [0...

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): C09D9/04C09D9/00
Inventor 饶猛夏金良莫庆生
Owner 上海富柏化工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com