CN109831879A - A kind of shield tin type PCB goes film liquid - Google Patents
A kind of shield tin type PCB goes film liquid Download PDFInfo
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- CN109831879A CN109831879A CN201910134521.9A CN201910134521A CN109831879A CN 109831879 A CN109831879 A CN 109831879A CN 201910134521 A CN201910134521 A CN 201910134521A CN 109831879 A CN109831879 A CN 109831879A
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Abstract
The invention discloses a kind of shield tin type PCB to go film liquid, it is related to board production manufacture field, it aims to solve the problem that and existing goes film liquid that in moving back membrane process tin layers are destroyed with serious problem, technical points include following parts by weight: 10-25 parts of sodium hydroxide, 1-6 parts of tin agent of shield, 2-7 parts of life extender, 3-15 parts of accelerator, 5-19 parts of Long carbon chain fatty amine, 9-26 parts of polyphosphazene polymer ether compound, 90-160 parts of distilled water, the present invention can in moving back membrane process effective protection tin layers, make it not by caustic corrosion, stripping speed is fast and stablizes, and bath life is long, free from admixture, plate face is clean, discharging of waste liquid is few, energy-saving and emission-reduction are achieved the purpose that.
Description
Technical field
The present invention relates to board production manufacture fields, more specifically, it relates to which a kind of shield tin type PCB goes film liquid.
Background technique
In the production process of printed wiring board, before being etched it, need to carry out photoresist to move back film
Processing, in the process, usually using going film liquid to strip the Chemical composition that of the photoresist on substrate, now
Commonly going film liquid is the aqueous solution of sodium hydroxide 3-4%, but since tin layers are not alkaline-resisting, carries out moving back film to cause etchant resist
Meanwhile sodium hydroxide will cause corrosion to tin layers, it is necessary to thicken tin layers and compensate, thus substantially increase tin plating and move back tin
Cost.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of shield tin type PCB to go film liquid, using pair
Tin layers are protected, and the corrosion to tin layers is substantially reduced, and are had stripping speed fast and are stablized, bath life length, free from admixture, plate face
The advantage not aoxidized etc..
To achieve the above object, the present invention provides the following technical scheme that
A kind of shield tin type PCB goes film liquid, including following parts by weight:
By taking above-mentioned technical proposal, shield tin agent is added in film liquid, wiring board is moved back in sodium hydroxide
When film process, tin layers in protection circuit plate avoid tin layers from being corroded, and then avoid the waste of tin cost, simultaneously plus
Fast agent and life extender can increase the striping speed and service life of film liquid, and Long carbon chain fatty amine then promotees as broken film
Into the tearing of etchant resist, polyphosphazene polymer ether compound has excellent osmosis as a kind of no alveolitoid surfactant, into
And the molten film amount of tank liquor can be improved, finally under the premise of accelerating striping speed and extending the service life of tank liquor, reaches and dropped significantly
The purpose of the low corrosion to tin layers of going film liquid.
The further setting of the present invention is that the shield tin agent is imidazoles, alkyl imidazole, benzotriazole, sodium citrate, urine
One of element, tetrahydrofurfuryl alcohol and pyridine are a variety of.
By taking above-mentioned technical proposal, imidazoles, alkyl imidazole, benzotriazole are as azole compounds, in structure
Imidazole ring coordinate bond can be formed by share electron pair with tin, and then be adsorbed on imidazoles, alkyl imidazole, benzotriazole
Tin layers surface, while the Gibbs free energy in this adsorption process is negative value, has spontaneous progressive, and imidazoles, alkyl miaow
The E of azoles, benzotriazole moleculeHOMOIt is larger, and the energy gap difference △ E between HOMO and LUMO is smaller, make imidazoles, alkyl imidazole,
Stability after benzotriazole film forming is higher, and because imidazoles, alkyl imidazole, the dipole moment of benzotriazole are higher, so that
It is stronger with the coordinate bond bonding that tin is formed, and then can form the protective film of one layer of compact and firm on the surface of tin layers,
It avoids sodium hydroxide from attacking tin layers, tin is caused to migrate, processing procedure below is etched and generates hidden danger, while sodium citrate, urine
Element, tetrahydrofurfuryl alcohol are then used as adsorbed film type corrosion inhibiter, can also be adsorbed in tin layers, form one layer of fine and close hydrophobic film, protection
Tin layers are not corroded, pyridine then due on nitrogen-atoms there are one sp2 hybridized orbit be not engaged in bonding and by a pair of of lone electron
To occupying, and then pyridine can form coordinate bond between tin layers, and then also form protective film on tin layers surface, by tin layers and alkali
Liquid separates, and tin layers is avoided to be corroded.
The further setting of the present invention is that the life extender is one of glycerol, isopropanol, polyethylene glycol or more
Kind.
By taking above-mentioned technical proposal, glycerol relies on its plasticity, is inserted between molecule, and then can be improved
The activity of molecule, and then improve and go the efficiency of film liquid, meanwhile, isopropanol, can be to avoid producing as a kind of detergent in tank liquor
Raw a large amount of impurity, and polyethylene glycol is a kind of surfactant, micella can be formed in being easy, and makes the broken film in solution can
To be dissolved in micella, and then the molten film amount of tank liquor can be increased, it is final to realize the increase for going film liquid service life.
The further setting of the present invention is that the molecular weight of the polyethylene glycol is 300-500.
By taking above-mentioned technical proposal, because the property of polyethylene glycol changes, molecular weight with the change of molecular weight
Liquid condition can be not only kept for the polyethylene glycol of 300-500, but also hydrophily is preferable, dispersibility improves, can be in tank liquor
Equally distributed micella is formed, the molten film amount of tank liquor is further increased.
The further setting of the present invention is that the accelerator is one of ethanol amine, triethanolamine, ammonium hydroxide or a variety of.
By taking above-mentioned technical proposal, hydroxyl and amino are contained in ethanol amine and triethanolamine, can between water shape
At hydrogen bond, and ammonium hydroxide can also form hydrogen bond with water, all have with good hydrophily, penetrating power is strong, can promote against corrosion
Film speed is moved back in the expansion and rupture of layer, raising, improves production efficiency.
The further setting of the present invention is that the carbon atom number of Long carbon chain fatty amine is 8-12.
By taking above-mentioned technical proposal, the Long carbon chain fatty amine of 8-12 carbon can be dissolved in as broken film and move back film master
In agent, synergistic effect can be generated with other components, effectively promote the tearing of etchant resist, obtained diaphragm is fine crushing and size base
This is consistent, and membrane efficiency is gone in raising.
The further setting of the present invention is that polyphosphazene polymer ether compound is that propylene glycol block polyether and trimethylolpropane are poly-
One of ether is a variety of.
By taking above-mentioned technical proposal, because broken film is gradually dissolved in tank liquor, tank liquor with the progress for removing membrane process
Molten film amount can reduce, and then will appear a series of problems, such as striping is not clean, and propylene glycol block polyether and trimethylolpropane are poly-
For ether as a kind of no alveolitoid surfactant, permeability is strong, and can form micella in the solution, dissolution of the micella to broken film
Degree is greater than tank liquor to the solubility of broken film, and then can make in the broken film transfer to micella in tank liquor, and then improves tank liquor
Molten film amount.
The further setting of the present invention is that the molecular weight of propylene glycol block polyether is 1000-1500, the trihydroxy methyl third
The molecular weight of alkane polyethers is 500-1400.
By taking above-mentioned technical proposal, the outstanding feature of polyethers is that its property changes therewith with the increase of pfpe molecule amount
Become, the trimethylolpropane polyethers that the propylene glycol block polyether and molecular weight that molecular weight is 1000-1500 are 500-1400, they
Hydrophilic group and hydrophobic group reasonable quantity, evenly dispersed micella can be formed in tank liquor, will not occur excessively to assemble shows
As can preferably improve the molten film amount of tank liquor.
In conclusion the invention has the following advantages:
1. imidazoles, alkyl imidazole, benzotriazole, sodium citrate, urea, tetrahydrofurfuryl alcohol and pyrrole is added in the present invention in stripper
One of pyridine or it is a variety of as shield tin agent, can metal surface formed layer protecting film, avoid sodium hydroxide to tin layers into
Row attack, causes tin to migrate, and etches to processing procedure below and generates hidden danger；
It, can be with shape using the plasticization of glycerol, the cleaning action of isopropanol, polyethylene glycol 2. the present invention increases life extender
At the property of micella, molecular activity, spatter property and the molten film amount of tank liquor can be increased, and then the use longevity of tank liquor can be improved
Life；3. the Long carbon chain fatty amine of 8-12 carbon is added in the present invention in stripper, synergistic effect can be generated with other components, effectively
Promotion etchant resist tearing, obtained diaphragm is fine crushing and size is almost the same, raising go membrane efficiency；
4. polyphosphazene polymer ether compound is added in the present invention in stripper, can be formed using polyphosphazene polymer ether compound to broken film
The biggish micella of solubility reduces diffusional area of the diaphragm in tank liquor, improves the molten film amount of tank liquor, extend the service life of tank liquor,
Also improve the processing capacity of film liquid.
Specific embodiment
Invention is further described in detail with reference to embodiments.
Embodiment one:
Since proportioning process of the invention and common striping liquid phase are same, and known to those skilled in the art, so it will not be repeated.
A kind of shield tin type PCB goes film liquid, including following parts by weight:
Wherein shield tin agent is 10 parts of imidazoles, 12 parts of alkyl imidazole, 11 parts of benzotriazole.
Life extender is 16 parts of glycerol, 10 parts of isopropanol.
Accelerator is 12 parts of ethanol amine, 11 parts of triethanolamine.
The trihydroxy methyl that polyphosphazene polymer ether compound is the propylene glycol block polyether that molecular weight is 1000 and molecular weight is 500
Propane polyethers, parts by weights mixed proportion are 1:1.
Embodiment two:
A kind of shield tin type PCB goes film liquid, including following parts by weight:
Wherein shield tin agent is 12 parts of imidazoles, 9 parts of sodium citrate, 9 parts of urea.
The polyethylene glycol that life extender is glycerol and molecular weight is 300.
Accelerator is 12 parts of ethanol amine, 11 parts of triethanolamine.
Polyphosphazene polymer ether compound is the trihydroxy methyl third that molecular weight is 1200 propylene glycol block polyethers and molecular weight is 700
Alkane polyethers, parts by weights mixed proportion are 1:1.
Embodiment three:
A kind of shield tin type PCB goes film liquid, including following parts by weight:
Wherein shield tin agent is 13 parts of benzotriazole, 11 parts of sodium citrate, 9 parts of urea, 11 parts of tetrahydrofurfuryl alcohol.
The polyethylene glycol that life extender is 11 parts of isopropanol, molecular weight is 400.
Accelerator is 14 parts of ethanol amine, 8 parts of ammonium hydroxide.
The trihydroxy methyl that polyphosphazene polymer ether compound is the propylene glycol block polyether that molecular weight is 1300 and molecular weight is 800
Propane polyethers, parts by weights mixed proportion are 1:1.
Example IV:
A kind of shield tin type PCB goes film liquid, including following parts by weight:
Wherein shield tin agent is 9 parts of alkyl imidazole, 11 parts of benzotriazole, 9 parts of sodium citrate, 7 parts of urea, 8 parts of pyridine.
Life extender is the polyethylene glycol that molecular weight is 500.
Accelerator is 11 parts of ethanol amine, 7 parts of triethanolamine, 8 parts of ammonium hydroxide.
Polyphosphazene polymer ether compound is the propylene glycol block polyether that molecular weight is 1500.
Embodiment five:
A kind of shield tin type PCB goes film liquid, including following parts by weight:
Protect tin agent wherein as 11 parts of sodium citrate, 9 parts of urea, 8 parts of tetrahydrofurfuryl alcohol and 12 parts of pyridine.
The polyethylene glycol that life extender is 11 parts of glycerol, 6 parts of isopropanol, molecular weight are 470.
Accelerator is 11 parts of ethanol amine, 7 parts of triethanolamine.
Polyphosphazene polymer ether compound is the trimethylolpropane polyethers that molecular weight is 1300.
Comparative example:
The present invention with common sodium hydroxide goes film liquid, and comparing result is as follows as a comparison case:
| Comparison project | Sodium hydroxide | The present invention goes film liquid |
| Route processing procedure makes ability | >3min | >2min |
| Production capacity | 1 | 3 |
| Molten tin | 1 | 0.2–0.5 |
| Yield | 1 | 1.2 |
| Discharging of waste liquid | 1 | 0.2 |
| Use the time | 2-3 days | 10-15 days |
Conclusion:
Through correlation data it is found that when carrying out striping using dry film of the present invention to circuit board, due to depositing for shield tin agent
Film liquid is being gone compared to common sodium hydroxide, the present invention is extremely low to the destruction of tin layers, can be effectively protected tin layers, simultaneously
Since the present invention is added to other related functionality additives, tank liquor service life and molten film amount can be improved, can not only mention
Height goes membrane efficiency, and can achieve the purpose of energy-saving and emission-reduction.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (8)
1. a kind of shield tin type PCB goes film liquid, it is characterised in that including following parts by weight:
10-25 parts of sodium hydroxide
1-6 parts of tin agent of shield
2-7 parts of life extender
3-15 parts of accelerator
5-19 parts of Long carbon chain fatty amine
9-26 parts of polyphosphazene polymer ether compound
90-160 parts of distilled water.
2. a kind of shield tin type PCB according to claim 1 goes film liquid, it is characterised in that: the shield tin agent is imidazoles, alkane
One of base imidazoles, benzotriazole, sodium citrate, urea, tetrahydrofurfuryl alcohol and pyridine are a variety of.
3. a kind of shield tin type PCB according to claim 1 goes film liquid, it is characterised in that: the life extender be glycerol,
One of isopropanol, polyethylene glycol are a variety of.
4. a kind of shield tin type PCB according to claim 3 goes film liquid, it is characterised in that: the molecular weight of the polyethylene glycol
For 300-500.
5. a kind of shield tin type PCB according to claim 1 goes film liquid, it is characterised in that: the accelerator is ethanol amine, three
One of ethanol amine, ammonium hydroxide are a variety of.
6. a kind of shield tin type PCB according to claim 1 goes film liquid, it is characterised in that: the carbon of the Long carbon chain fatty amine
Atom number is 8-12.
7. a kind of shield tin type PCB according to claim 1 goes film liquid, it is characterised in that: the polyphosphazene polymer ether compound
For one of propylene glycol block polyether and trimethylolpropane polyethers or a variety of.
8. a kind of shield tin type PCB according to claim 7 goes film liquid, it is characterised in that: the molecule of the propylene glycol polyethers
Amount is 1000-1500, and the molecular weight of the trimethylolpropane polyethers is 500-1400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134521.9A CN109831879A (en) | 2019-02-23 | 2019-02-23 | A kind of shield tin type PCB goes film liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134521.9A CN109831879A (en) | 2019-02-23 | 2019-02-23 | A kind of shield tin type PCB goes film liquid |
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| CN109831879A true CN109831879A (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910134521.9A Pending CN109831879A (en) | 2019-02-23 | 2019-02-23 | A kind of shield tin type PCB goes film liquid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118501A (en) * | 2020-01-07 | 2020-05-08 | 深圳市星扬高新科技有限公司 | Tin surface protective agent and preparation method thereof |
| CN113755851A (en) * | 2021-09-10 | 2021-12-07 | 珠海市板明科技有限公司 | Tin surface protective agent and film stripping liquid for circuit board production |
| CN114086169A (en) * | 2021-11-09 | 2022-02-25 | 南通群安电子材料有限公司 | Tin surface protective agent |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63172746A (en) * | 1986-12-31 | 1988-07-16 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Removal of epoxy |
| CN105331978A (en) * | 2015-12-03 | 2016-02-17 | 东莞市广华化工有限公司 | Novel inorganic environment-friendly membrane removing liquid |
| CN107815245A (en) * | 2017-11-02 | 2018-03-20 | 深圳市华宇节耗电子有限公司 | A kind of application of dodecyl triethoxysilane and the tin face protective agent for PCB manufactures and the guard method of tin face |
-
2019
- 2019-02-23 CN CN201910134521.9A patent/CN109831879A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63172746A (en) * | 1986-12-31 | 1988-07-16 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Removal of epoxy |
| CN105331978A (en) * | 2015-12-03 | 2016-02-17 | 东莞市广华化工有限公司 | Novel inorganic environment-friendly membrane removing liquid |
| CN107815245A (en) * | 2017-11-02 | 2018-03-20 | 深圳市华宇节耗电子有限公司 | A kind of application of dodecyl triethoxysilane and the tin face protective agent for PCB manufactures and the guard method of tin face |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118501A (en) * | 2020-01-07 | 2020-05-08 | 深圳市星扬高新科技有限公司 | Tin surface protective agent and preparation method thereof |
| CN113755851A (en) * | 2021-09-10 | 2021-12-07 | 珠海市板明科技有限公司 | Tin surface protective agent and film stripping liquid for circuit board production |
| CN114086169A (en) * | 2021-11-09 | 2022-02-25 | 南通群安电子材料有限公司 | Tin surface protective agent |
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