CN109778157A - A kind of production method of environment-friendly type zinc-tin gold - Google Patents
A kind of production method of environment-friendly type zinc-tin gold Download PDFInfo
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- CN109778157A CN109778157A CN201711117038.7A CN201711117038A CN109778157A CN 109778157 A CN109778157 A CN 109778157A CN 201711117038 A CN201711117038 A CN 201711117038A CN 109778157 A CN109778157 A CN 109778157A
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Abstract
The present invention provides a kind of production method of environment-friendly type zinc-tin gold, and this method has etched route first, handled wiring board well using anti-solder ink；Then the pre-treatments such as polish-brush or sandblasting are crossed；Then this wiring board is placed in degreasing tank and is handled 5 minutes；Then it is cleaned with tap water, send into microetch slot processing 2 minutes；Then it is cleaned with deionized water, is handled 1 minute into pre- immersion trough；It then immediately proceeds to handle 1 minute in activated bath；Then it is cleaned with deionized water, is handled 20 minutes in the chemical zinc-tin at 80 DEG C；Then it is cleaned with deionized water, is handled 10 minutes in the chemistry gold configured at 88 DEG C with 10% KOZO 806 and 2 gram per liters of citric acid gold.The present invention solves there is technical issues that in existing production method, and the lead in substituted chemistry zinc-tin keeps chemical zinc-tin completely environmentally friendly, and the bad generation of solderless zinc-tin.Toxic gold potassium cyanide in substituted chemistry gold makes the environmental protection completely of chemical gold, and solution-stabilized, will not decompose.
Description
Technical field
The present invention relates to chemical fields, and in particular to a kind of production method of environment-friendly type zinc-tin gold.
Background technique
The production method of existing zinc-tin gold is that a small amount of palladium is replaced on the copper face of route, makes route in chemical zinc-tin slot
The 4 microns thick zinc-tin phosphorous alloy layer that one layer of phosphorus content is about 7-10% is deposited in the way of redox using palladium as catalytic core
(phosphorus is chemical zinc-tin byproduct of reaction eutectoid in zinc-tin layer) replaces one layer with displaced method on the zinc-tin phosphorous alloy layer
0.07 micron of layer gold.Chemical zinc-tin gold is surface treatment powerful in wiring board, it can be used in as Mobile phone key panel,
In computer memory item etc. electronic product, it can not only do soldering part but also while can do current lead-through contact point.But in fact
It is a kind of and technique not environmentally.Referenced patent is visible: Chinese patent: can obtain the chemical plating zinc-tin of high solderability coating
Phosphorus alloy solution for magnesium alloy, publication number 102011107A, publication date 2011-04-13.It is the chemical zinc-tin plating in chemical zinc-tin gold first
Contain lead in liquid, lead acts on obviously in chemical zinc-tin.Chemical zinc-tin belongs to self-catalyzed reaction, it is to utilize the zinc-tin deposited
The redeposited zinc-tin atom out of atom catalytic chemistry zinc-tin itself.The characteristics of this kind of reaction is that reaction can be more and more violent, until changing
Learning zinc-tin cannot use because reacting acutely, because having to that the stabilizer for inhibiting reaction is added a bit.Lead is most good stabilization
One of agent, content in the plating solution are generally 0.2-1.5ppm.Plating solution plates more long, and the additive amount of lead is more.These lead meetings
With the deposition of zinc-tin in tank liquor, eutectoid is in zinc-tin phosphorous alloy layer, content about 300-500ppm.Zinc-tin layer is substantially zinc-tin phosphorus
Metal layer.During assist side chemistry zinc-tin gold, industry and the fact that have not been changed zinc-tin phosphorus metal layer.Because changing
It learns zinc-tin gold to be not only used to do current lead-through contact point, to be also used to weld zinc-tin.And lead is still best weldering in the prior art
Zinc-tin material.Bad in order to reduce weldering zinc-tin, people do not remove to change these interior a small amount of lead of zinc-tin layer in chemical zinc-tin gold.
And in chemical gold, people generally use the raw material that the gold potassium cyanide containing severe toxicity is replaced as zinc-tin gold.Cyanide
With the stability of height in chemical plating, therefore it is used for a long time as the raw material of industry in industry.
The lead gone in substituted chemistry zinc-tin it is therefore desirable to provide a kind of method；It is gone using a kind of nontoxic and stable gold salt
Gold potassium cyanide in substituted chemistry gold, makes chemical zinc-tin gold become real environment-friendly products.
Summary of the invention
There is technical issues that solve existing production method, present invention employs a kind of environment-friendly type zinc-tin gold
Production method.
To achieve the above object, technical scheme is as follows:
A kind of production method of environment-friendly type zinc-tin gold, it is characterised in that: the method successively in proper order are as follows: pre-treatment removes
Oil, microetch, preimpregnation, activation, chemical zinc-tin, chemistry gold；Specifically includes the following steps:
1) route has been etched, has handled wiring board well through anti-solder ink, after the pre-treatments such as polish-brush or sandblasting, has been formed relatively clean
Net wiring board copper face；
2) this wiring board is placed in degreasing tank, further removes copper face oxidation and greasy dirt；
3) it is cleaned with deionized water, into chemical zinc-tin, using palladium as one layer of phosphorus content about 7-10% of catalytic core self-catalysis
4 microns thick of zinc-tin phosphorous alloy layer；
4) it is cleaned with deionized water, into chemical golden slot, replaces one layer of about 0.07 micron of thick layer gold in displaced method,
For welding zinc-tin and preventing from aoxidizing.
As a further improvement of the above technical scheme, the preparation method of each reactive tank is as follows in the step 2:
1) degreasing tank is handled 5 minutes at 45 DEG C with 10% 801 slot allocation of KOZO；
2) microetch slot handles 2 points with 100 gram per liters of sodium peroxydisulfate and 20 milliliters every liter of concentrated sulfuric acid slot allocation at 27 DEG C
Clock；
3) pre- immersion trough uses 0.5% concentrated sulfuric acid slot allocation to handle 1 minute at room temperature；
4) activated bath is handled 1 minute at 27 DEG C with 8% 804 slot allocation of KOZO；
5) chemical zinc-tin slot liquid composite is handled 20 minutes at 80 DEG C；
6) the golden slot of chemistry is handled 10 minutes at 88 DEG C with 10% KOZO 806 and 2 gram per liters of citric acid gold slot allocation.
Implement the present invention: a kind of production method of environment-friendly type zinc-tin gold has the advantages that
1, the lead in substituted chemistry zinc-tin, keeps chemical zinc-tin completely environmentally friendly, and the bad generation of solderless zinc-tin.
2, toxic gold potassium cyanide in substituted chemistry gold makes the environmental protection completely of chemical gold, and solution-stabilized, will not occur point
Solution.
3, it joined unleaded stabilizer, the function of stable inhibition reaction can be played.It joined excellent opening and plate agent sulphur
Potassium cyanate, no thermal losses can be reduced and drag the cylinder time, increase client's production capacity, reduce consumption；It can be reduced stabilizer on plating piece side simultaneously
Determination of total precipitated quantities among the far super plating piece of edge determination of total precipitated quantities, and cause corrosion caused by galvanic interaction.It possesses stronger corrosion resistance.
4, weldering zinc-tin wetting angle is small, welds zinc-tin function admirable.
5, the golden cyanide-free of chemistry, asepsis environment-protecting, and bath stability, decompose, be precipitated without gold under 88 DEG C of high temperature for a long time etc.
Phenomenon.
Specific embodiment
A kind of production method of environment-friendly type zinc-tin gold provided by the invention, this method have etched route and first through anti-solder pastes
The wiring board that ink is handled well, and then by pre-treatments such as polish-brush or sandblastings；Then this wiring board is placed at 50 DEG C with 10%
KOZO 801 configure degreasing tank handle 5 minutes；Then cleaned with tap water, send at 27 DEG C with 100 gram per liters of over cure
Sour sodium and the microetch slot of 20 milliliters every liter of concentrated sulfuric acid configuration are handled 2 minutes；Then cleaned with deionized water, at room temperature with
The pre- immersion trough of 0.5% concentrated sulfuric acid configuration is handled 1 minute；Then immediately proceed to the work configured at 27 DEG C with 8% KOZO 804
Change slot to handle 1 minute.It is finally cleaned with deionized water, is handled 20 minutes into the chemical zinc-tin at 80 DEG C.Wherein, chemical zinc
Molten tin bath liquid composite is realized using formula as below:
Wherein, sulfuric acid zinc-tin is to provide the main salt of zinc-tin ion；Sodium hypophosphite is the reducing agent of self-catalyzed reaction；Lactic acid
And succinic acid is complexing agent；Potassium rhodanide is to open plating agent (extremely low potassium rhodanide toxicity is cyanide antidote by-product)；Ammonium hydroxide
For pH adjusting agent；Pre-selection stabilizer is the other inorganic stabilizers compositions for replacing lead, such as Sb2O3, Bi2O3, KIO3 and ammonium molybdate
One of.It is finally cleaned with deionized water, is matched at 88 DEG C with 10% KOZO 806 and 2 gram per liters of citric acid gold
The golden slot of the chemistry set is handled 10 minutes.
It is further illustrated below in conjunction with specific embodiment:
1 zinc-tin slot of embodiment:
2 zinc-tin slot of embodiment:
Claims (1)
1. a kind of production method of environment-friendly type zinc-tin gold, it is characterised in that: the method successively in proper order are as follows: pre-treatment, oil removing,
Microetch, preimpregnation, activation, chemical zinc-tin, chemistry gold；Specifically includes the following steps:
1) route has been etched, has handled wiring board well through anti-solder ink, after the pre-treatments such as polish-brush or sandblasting, has formed cleaning relatively
Wiring board copper face；
2) this wiring board is placed in degreasing tank, further removes copper face oxidation and greasy dirt；
3) it is cleaned with deionized water, into chemical zinc-tin, using palladium as the 4 micro- of one layer of phosphorus content about 7-10% of catalytic core self-catalysis
The thick zinc-tin phosphorous alloy layer of rice；
4) it is cleaned with deionized water, into chemical golden slot, replaces one layer of about 0.07 micron of thick layer gold in displaced method, be used for
It welds zinc-tin and prevents from aoxidizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117038.7A CN109778157A (en) | 2017-11-13 | 2017-11-13 | A kind of production method of environment-friendly type zinc-tin gold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117038.7A CN109778157A (en) | 2017-11-13 | 2017-11-13 | A kind of production method of environment-friendly type zinc-tin gold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109778157A true CN109778157A (en) | 2019-05-21 |
Family
ID=66494732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711117038.7A Pending CN109778157A (en) | 2017-11-13 | 2017-11-13 | A kind of production method of environment-friendly type zinc-tin gold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109778157A (en) |
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2017
- 2017-11-13 CN CN201711117038.7A patent/CN109778157A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190521 |