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Environmentally-friendly weak alkaline low-temperature deburring softening solution, and preparation method and use method thereof

A weak alkaline and deburring technology, which is applied in the field of preparation of environment-friendly weak alkaline low-temperature softening fluid, can solve problems such as low safety factor of the operating environment, surface erosion of metal substrates and plastic packages, corrosion of metal substrates, etc., to achieve It has good effects of removing oil stains on the surface of substrates, burr softening, raw material safety and environmental protection.

Active Publication Date: 2012-12-05
JIANGSU AISEN SEMICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are very few excellent environment-friendly weak alkaline low-temperature deburring softening fluids, which are only seen in a small amount of data reports in Europe, America and other countries, and there is no large-scale production and marketization.
The traditional domestic method generally uses inorganic acid or organic solvent to soak at high temperature. The main problem is that the operating temperature is high and the energy consumption is large; in addition, the reactivity of inorganic acid increases at high temperature, which will corrode the metal substrate and the surface of the plastic package. However, organic solvents are likely to cause discoloration of the plastic package at high temperatures, and are likely to cause problems such as burning. The safety factor of the operating environment is small, and general organic solvents are easy to volatilize at high temperatures, resulting in a large amount of odor. waste of energy
In addition, some enterprises adopt the process of electrolytic deburring, because expensive electrolytic deburring equipment is required, which adds huge economic pressure to small and medium-sized manufacturers. In addition, electrolytic deburring uses strong alkali electrolysis, which is also easy to damage the metal substrate. Corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: Preparation of environment-friendly weak alkaline low temperature deburring softening solution

[0013] Carry out the ratio of each component and weight percentage according to the following ratio: tetrahydrofuran 30%, propylene glycol 30%, alkylphenol polyoxyethylene ether 1%, ethanolamine 5%, N-methyldiethanolamine 5%, the balance is water .

[0014] The preparation process of this embodiment is: according to the above-mentioned component content, add 2 / 3 amount of water in the container; under the situation of stirring, add tetrahydrofuran; under the situation of stirring, add propylene glycol at a uniform speed, continue to stir for 5-10 minutes; In case, add alkylphenol polyoxyethylene ether at a uniform speed, and continue to stir for 5-10 minutes; in case of stirring, add ethanolamine, continue to stir, add N-methyldiethanolamine, replenish water to the required amount, and stir for 1 hour, plastic Packed in buckets.

[0015] The use method of this e...

Embodiment 2-5

[0017] Repeat the method of Experimental Example 1 according to the content of each component specified in Table 1 below to obtain environmentally friendly weakly alkaline low-temperature deburring softening fluid with different components. The experimental results are shown in Table 1.

[0018] Table 1 embodiment experiment concrete parameter

[0019] Components (weight percent)

Example 1

Example 2

Example 3

Example 4

Example 5

Tetrahydrofuran (%)

30

10

35

30

35

Propylene glycol (%)

20

35

10

20

30

Alkylphenol polyoxyethylene ether (%)

1

2

5

5

1

Ethanolamine (%)

20

20

10

15

10

N-Methyldiethanolamine (%)

1

2

2

5

5

water(%)

28

31

38

25

19

Softening tank temperature (°C)

60

70

70

60

50

Soaking time (minutes)

70

50 ...

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PUM

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Abstract

The invention discloses a preparation method and a use method of environmentally-friendly weak alkaline low-temperature deburring softening solution. The environmentally-friendly weak alkaline low-temperature deburring softening solution comprises the components with weight percentages as follows: 10 to 35 percent of tetrahydrofuran, 10 to 35 percent of propylene glycol, 1 to 5 percent of alkyl phenol polyoxyethylene ether, 5 to 20 percent of ethanolamine, 1 to 10 percent of N-methyldiethanolamine and the balance of water. The environment-friendly weak alkaline low-temperature deburring softening solution provided by the invention has the advantages of low use temperature, good softening and flashing effect, no production of poisons and harmful gases, excellent deoiling effect, safety, environmental friendliness, adoption of formula substances completely satisfying of an environmentally-friendly requirement, product stability, simple process, energy conservation and high efficiency, and is convenient to use.

Description

technical field [0001] The invention relates to an environment-friendly weak alkaline low-temperature softening solution for deburring, in particular to a preparation method and a method for using the environment-friendly weak alkaline low-temperature softening solution for burrs in epoxy plastic packaging bodies. Background technique [0002] Electronic product components such as semiconductor packaging, PCB board printing, and passive components, before tinning, due to the good fluidity of small molecule epoxy resin in the process of chip plastic packaging, a layer will be formed on the surface of the substrate and pins unnecessarily. Resin film, commonly known as burr or flash. If this kind of flash is not treated, it will lead to poor appearance of the electroplating layer and copper leakage, which will affect the solderability of the product, and finally seriously affect the reliability of electronic components. Therefore, the deburring process is an important part of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/14
Inventor 王晓玉张兵赵建龙
Owner JIANGSU AISEN SEMICON MATERIAL CO LTD
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