CN104710870A - Ultraviolet curable solder-resist ink - Google Patents
Ultraviolet curable solder-resist ink Download PDFInfo
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- CN104710870A CN104710870A CN201310678623.XA CN201310678623A CN104710870A CN 104710870 A CN104710870 A CN 104710870A CN 201310678623 A CN201310678623 A CN 201310678623A CN 104710870 A CN104710870 A CN 104710870A
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- ink
- solder mask
- ultraviolet light
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses an ultraviolet curable solder-resist ink. The ultraviolet curable solder-resist ink comprises pigments and dyes; and the pigments are divided into organic pigments and inorganic pigments. Advantages of the organic pigments, such as azo pigments and phthalocyanine pigments, are that color is bright, tinting strength is excellent, and drying time is short, so that the organic pigments are widely used in ink. Advantages of the inorganic pigments, such as titanium white, cadmium red, chrome green, and ultramarine are that, light resistance, heat resistance, solvent resistance, and cover performance are excellent. According to the definition of ultraviolet curable solder-resist ink, ink film forming and ink drying can be realized via ultraviolet light with different wave length and energy under ultraviolet irradiation.
Description
(1) field
A kind of formula of ultraviolet light polymerization solder mask belongs to chemical field.
(2) brief introduction
UV ink is non-solvent type ink, can be directly dry by UV-light after being completed for printing, and flow process is simple, and environmental protection, cost is low, and printed pattern tolerance is ± 0.2mm, is mainly used on the simple product of one side.
Liquid photosensitive solder mask is solvent type ink, needs through Procuring, exposure, development, after fixing flow process after printing, and flow process is complicated, fabrication cycle is long, cost is relatively high, but figure tolerance can reach ± 0.05mm, is mainly used on accurate PCB/FPC.
Generally, the complexity of dual platen is generally higher than single sided board, and precision requirement is also higher, so uv solidification solder mask is not suitable for doubling plate in general.
But simple dual platen can be suitable for UV curing inks equally.
Soldering-resistance layer is the permanent resist being coated in printing board surface, and it protects printing board surface selectively, is short-circuited, bridge joint when preventing welding component between wire and pad.In addition, it also has the effect of protection against the tide, mildew-resistant, Defend salt fog.
Therefore, the quality of soldering-resistance layer quality not only affects the outward appearance of printed board, and can affect the work-ing life of printed board.
Along with the development of printed circuit board, curtain coating (or silk screen printing) liquid photosensitive solder mask (LiquidPhotoimageableInk is abbreviated as LPI) has become the predominant methods of printed board soldering-resistance layer processing.
DSR-2200NC solder mask system sensitive materials, spectral absorption region wavelength is 310nm ~ 440nm.Therefore must carry out in safe spectral wavelength ranges during operation, generally operate in the yellow light area of wavelength >=460nm.
Pre-baked substrate, leaves standstill and is cooled to room temperature, just can expose.Exposure should complete in 24h after preliminary drying, otherwise can cause development difficulty.Exposure is divided into contact exposure type and noncontact exposed type.
Although extend the process-cycle like this, processing quality can be ensured.Substrate after exposure at least leaves standstill more than 10min, to make crosslinking curing complete.
But the substrate after exposure must complete development within 12h, otherwise development difficulty can be caused.
Development should be carried out on developing machine.Concentration, temperature, several parameter such as developing powder and spray pressure of developing solution should be controlled well during development.
The concentration of usual selection developing solution is the Na2CO3 solution of 1.0% ~ 1.2%; Temperature controls at 25 DEG C ~ 35 DEG C; Developing powder is at about 1m/min, and time controling is within 90s; Spray pressure is 2kg/cm2.
Developing solution often should be changed according to the quantity of development substrate, to ensure the activity of developing solution.Fully rinse with water after development, to remove developing solution residual in plate face and plated through-hole and glued membrane.
Otherwise when can cause lower 1 procedure hot air leveling, it is plumbous that tin is not blown in pad and hole.Solidification is last 1 step of soldering-resistance layer processing, processing method also fairly simple the substrate developed need be put into 150 DEG C ± 5 DEG C Hotaircirculatingovens roast 35min ~ 60min can but solidification value and set time to be controlled well, otherwise its physicals can be reduced.The complete processing of liquid photosensitive heat curing-type solder mask is used widely at PCB industry, is undivided with its operational characteristic.
Comprise pigment and dyestuff, pigment divides pigment dyestuff and mineral dye, and the former tone is bright-coloured, strong coloring force, and it is short to put the dry time, so apply comparatively wide in ink, as azo system, the blue or green series pigments of phthalein; The latter's photostabilization, thermotolerance, solvent resistance, hidden power are all better, as titanium white, cadmium red, chrome green, ultramarine etc.
Pigment is painted with particulate, does not dissolve, and is colorant the most frequently used in ink.And dyestuff is mixed with solution in use, painted in molecular state, effect is not as pigment.
Colorant can give ink with distinct colors and depth of shade, and makes ink have certain viscosity and drying property.
Binder is also one of main component of ink, plays the instrumentality of dispersion color and auxiliary material, is to be dissolved in siccative oil or solvent obtained by a small amount of natural resin, synthetic resins, Mierocrystalline cellulose, rubber derivative etc.
There is certain mobility, make ink form uniform thin layer after printing, be formed with the rete of some strength after drying, and pigment is shielded, make it be difficult to come off.
Low-melting ink vehicle has a significant impact the printability such as transitivity, brightness, set speed of ink and printing effect, therefore, select suitable binder to be one of key ensureing that printing is good, according to the difference of wrapping material, print request etc., composition and the proportioning of low-melting ink vehicle can be adjusted at any time.
Ink ancillary component is a lot, mainly contains following several:
1. weighting agent
It is a kind of auxiliary agent regulating printing ink concentration, can also increase the thickness of ink rete, improves its wear resistance, and it does not have tinting strength and an opacifying power.
The formula of ultraviolet light polymerization solder mask mainly contains a barium sulfate, and talcum powder, calcium carbonate, aluminium hydroxide etc., ground into white powder during use.
2. thinner
Its effect reduces ink viscosity, prevents stripping phenomenon, make ink have operation adaptive.Conventional thinner has oligomerization oleum lini, mineral wet goods.
The former easily mixes with ink, acts on soft; The latter's dilution effect is obvious, but must guard against excessive, otherwise printing effect is bad.
3. anti skinning agent
Its effect is the rate of drying suppressing ink, prevents ink mechanically dry conjunctiva.
Its main component is organic reducing agent and oxidation inhibitor.It can make an addition in ink, also can spreading in contact ink mechanically.
4. anti-reverse-printed agent
Its effect prevents printing ink layer from printing to back side of paper, to ensure printing quality.The most frequently used anti-reverse-printed agent is W-Gum.
5. slip(ping)agent
Its effect is rub resistance and the mobility of improving ink, reduces viscosity, improves the smooth finish of rete, reduces paper fussed phenomenon.
Slip(ping)agent conventional in ink has dystectic Microcrystalline Wax, synthetic wax etc.
6. other auxiliary agents
Other auxiliary agents also have a lot, such as dispersion agent, wetting agent, siccative, stablizer etc.
Stock, printing-ink and other material and printing condition match, are suitable for the performance of presswork, are called printability.
The printability of ink, refers to that ink and printing condition match, is suitable for the performance of presswork.Mainly contain viscosity, the property, thixotropy, drying property etc.
The internal friction characteristic that ink shows in flowing, is called the viscosity of ink, measures the physical quantity of ink viscosity, is called the viscosity of ink.
The viscosity of ink can be measured with viscometer, and conventional viscosity is in respect of parallel-plate viscometer, and rotational viscosimeter, draws thunder viscometer etc.
In printing process, printing troubles such as if the performance of the tackiness of ink and stock, printing condition do not mate, then the dry linting of paper can occurring, fall hair, ink trapping is bad, press plate is dirty.
The tackiness of ink, can with removing stick or ZY easer adjusts.
The thixotropy of ink
At a certain temperature, ink is after stirring or applying mechanical external force, and mobility improves, viscosity degradation; After leaving standstill, mobility becomes again bad, and viscosity rises, and this character is called the thixotropy of ink.
In printing process, if the thixotropy of ink is bad, then can occur " lower Mo Buchang ", ink transfer is uneven, and site such as seriously to expand at the printing trouble.
In order to prevent the generation of above-mentioned fault, need often stir the ink in ink fountain with ink shovel or ink agitator is installed in ink fountain and frequently stir ink.
The physico-chemical property of ink mainly refers to its density, fineness, transparency, glossiness, photostabilization, thermotolerance and acid-and base-resisting, water, solvent (alcohol) property.
(1) density
When density refers to 20 DEG C, the weight of unit volume ink.Represent with g/cm3.
The density of ink is decided by kind and the ratio thereof of the raw material applied in ink, and is subject to the impact of outside temperature.
The density of ink and typography have certain relation.The density relationship of ink is to the consumption of ink in printing process.
Under identical printing condition, the ink usage that density is large is greater than the little ink of density.
The density of ink is excessive, mainly because ink in pigment density greatly caused by.
In printing process, because low-melting ink vehicle cannot shift together with the granules of pigments that dynamic density is excessive, make the solid particulates such as pigment be deposited in ink roller, forme or blanket surface, form stifled version phenomenon.
Particularly high speed printing or ink dilution larger time, use the large ink of density more easily to occur this phenomenon.
Meanwhile, the ink that density is large and the little ink of density used in combination time, if the two gap is excessive, easily produce mass colour demixing phenomenon.
The ink that density is little floats, and the sinking that density is large, makes the color of ink pellet surface be partial to the little ink of density, and the color of bottom ink is then partial to the large ink of density.Generally, the density of printing-ink is between 1g/cm3 to 2.25g/cm3.
(2) fineness
Fineness refers to the degree of the dispersion of the pressed powder such as pigment, stopping composition in low-melting ink vehicle in ink, also known as dispersity.
It show that the size of solid particulate in ink and particle distribute in low-melting ink vehicle all and degree.
The fineness of ink shows the trickle of solids well, and in ink, solids is evenly distributed.
The fineness of ink is decided by that low-melting ink vehicle stirs the wetness degree of the solids such as pigment and ink, it is good to roll the fineness of grinding rear ink.
The fineness of ink is related to rheological, the printability such as degree of mobilization and stability of ink, is a very important quality index.
The fineness of ink is poor, and particle is thick, can cause stifled version phenomenon in printing.The phenomenon of damaging forme and scraper can be caused in offset lithography and gravure.
And due to the dispersion of pigment uneven, the intensity of ink colors can not be not fully exerted, affect ink tinting strength and dry after the bright degree of ink film.
(3) transparency
Transparency refers to that ink produces the degree of refraction (transmission) to incident beam.
When transparency refers to that ink is uniformly coated into film like in printing, the degree that the background color bearing object manifests can be made.
The transparency of ink is low, when background color can not be made to manifest completely, just can hide, background color so this performance of ink is also called opacifying power to a certain extent.
Inversely, when transparency hides certain background color completely with ink, the thickness of ink layer represents, thickness is larger, shows that the transparency of ink is better, opacifying power is lower for the transparency of ink and opacifying power.
Transparency depends on the difference of pigment and low-melting ink vehicle specific refractory power in ink, and relevant with the dispersity of pigment.
The refractive index difference of pigment and low-melting ink vehicle is less, and the dispersity of pigment in low-melting ink vehicle is better, then the transparency of ink is higher.
(4) glossiness
After glossiness refers to the ink setting of printed matter surface, under irradiate light, the ability of reflection ray in same direction set.
It is large that the ink that glossiness is high shows as brightness on printed matter.
Glossiness depends mainly on kind and the character of low-melting ink vehicle in ink, the process of refining process and the dried smooth degree of ink film during ink manufactures.
In addition the glossiness of ink is also subject to the character of pigment in ink composition, the size shape of particle and the impact of dispersity; The impact of the performance such as permeability, levelling property, drying property of ink; Impact of printed substrate etc.
(5) photostabilization
Photostabilization refers to that ink is under fluorescent lamp irradiates, the ability that color does not change.
The photostabilization of ink indicates printed matter and fades under irradiate light or the degree of variable color.
Though through daylight long-term irradiation after the ink printing that photostabilization is strong, it is little that printed matter takes off discoloration; Its printed matter of the ink of photostabilization difference easily takes off variable color, and even color can fade away completely.
In the classification of ink, 8 grades least easily take off variable color, and photostabilization is best.
The photostabilization of ink depends primarily on pigment, and the photostabilization of ink without impact, is mainly related to the use procedure of printed matter on printing process.
(6) thermotolerance
The ability that when thermotolerance refers to that ink is heated, color does not change.Thermotolerance indicates by force printed matter when being heated to higher temperature, and ink can not produce metachromatism.
The thermotolerance of ink depends primarily on kind and the performance of pigment and low-melting ink vehicle.Some pigment not only produces variable color when heating, and even changes.
(7) acid-and base-resisting, water, solvent (alcohol) property
This performance refers to that ink is under the effect of acid, alkali, water, alcohol or other solvents, and the ability that color and performance do not change, is also called chemical resistant properties or the resistance of ink.
The chemical resistant properties of ink is strong, and under the effect of the materials such as acid, alkali, the character of colors and inks can not change.
The chemical resistant properties of ink is determined by the kind of pigment and low-melting ink vehicle and performance, and relevant with the state that pigment and low-melting ink vehicle combine, relevant with the stability of ink.
(3) definition and application
Ultraviolet light polymerization (UV) ink refers under uviolizing, utilizes the UV-light of different wave length and energy to make ink film forming and dry ink.
Utilize different UV spectrum, can different-energy be produced, the monomer polymerization in different ink vehicle is become polymkeric substance, so the look film of UV ink has good machinery and chemical property.
The major advantage of UV ink has: (1) is without solvent; (2) rate of drying is fast, and power consumption is few; (3) good luster, bright in luster; (4) water-fast, solvent resistant, wear resisting property is good.
In UV ink, light trigger is that one is subject to light activated compound, after absorb light is shone, be excited into free radical, and energy trasfer, to photosensitivity molecule or photocrosslinking agent, makes UV ink that photocuring reaction occur.
Current UV ink has become a kind of more ripe ink technology, and its pollutant emission is almost nil.Except not containing solvent, UV ink also just like not easily scumming, the advantages such as site is clear, the bright-coloured light of mass colour, and chemical resistance is excellent, low-consuming.
(4) composition and composition
Liquid photosensitive solder mask, mainly based on the resin of photocuring and thermofixation, coordinates sensitizer, thermal curing agents, filler, colorant and various auxiliary agent composition.
It is coated with by curtain or the method for silk-screen is coated on the substrate after etching, through series of process processes such as preliminary drying, exposure, development, after fixing, finally forms the polymeric coating of a kind of crosslinking curing at printing board surface.
After soldering-resistance layer machines, must reach that strong adhesion, hardness are high, solvent resistant, acid and alkali-resistance, heat-resisting wet goods requirement.
Because technological process is comparatively complicated, therefore not only select solder mask material extremely important, and strict technology control the key point guaranteeing soldering-resistance layer quality especially in process of production.
Must control by strengthening process in each process, the processing quality of guarantee soldering-resistance layer, is both and also will considers other factors.
This ink is two component liquid photosensitive thermohardening type solder mask, should be that host and stiffening agent are modulated by the ratio of 3: 1 in mass ratio, fully stir before using, and leaves standstill 10min, can use after bubble collapse.
After processing film forming, soldering-resistance layer color is green, and luminance brightness is between highlight type and sub-smooth type, and physicals is good.
A kind of host of formula of ultraviolet light polymerization solder mask and solidifying agent should keep in Dark Place below 25 DEG C, and storage period is 6 months.
Use within storage period, good effect can be obtained.
From practical situations, exceed validity period a little, as long as technology controlling and process is strict, also can not impact quality product (but strict military printed board is required to quality product, definitely can not use expired ink).
The mixed ink of two components, its work-ing life is only 24 hours.
Owing to there is chemical reaction between each composition of two component mixed inks, even if strictly control storage requirement, the ink more than 24 hours also definitely can not use.
Therefore, for avoiding waste, require according to consumption size, before use 10 minutes now with the current.
The envrionment conditions that silk-screen operation room general requirement controls is as follows:
(1) temperature: 18 DEG C ~ 25 DEG C;
(2) relative humidity: 50% ~ 60%;
(3) clean level: more than 10000 grades;
(4) safety light: gold-tinted.
Envrionment temperature mainly has an impact to ink viscosity.
Temperature is low, and ink viscosity is large, silk-screen operational difficulty, and soldering-resistance layer thickness increases; Temperature is high, and ink viscosity is low, and mobility is large, and silk-screen welding resistance is lepthymenia, does not reach requirement.
The predrying insufficient or dry rear naturally cooling of silk-screen prebasal plate, can be comparatively large because of ambient relative humidity, causes the substrate moisture absorption again, produces detrimentally affect by the bonding force of coating after silk-screen and copper face situation.
Under causing soldering-resistance layer, Copper Foil is oxidized, and produces blackspot, affects printed board outward appearance; Or during heat-shock, soldering-resistance layer bubbles, comes off.
Therefore, operation room ambient moisture can not be too high, generally should control in 50% ~ 60% relative humidity.
If due to limited conditions, cannot ensure, strictly control with regard to predrying before reply silk-screen.
When particularly the quantity of substrate is more, should drying-plate, in batches silk-screen in batches.
In addition, during print B face, also to be controlled cooling time, be strictly on guard against the real estate moisture absorption again.
Solder mask is before unexposed solidification, and the micronic dust existed in surrounding environment, paper scrap, cotton fibre, hair etc. are easy to be adsorbed onto on ink, are then coated on real estate, become the fifth wheel on soldering-resistance layer.
Not only affect product appearance, and partially conductive dirt bits also can affect the electrical property of printed board, cause substrate to be scrapped.
Therefore, the degree of purification of operation room should reach certain grade.In actually operating, if condition does not possess, do environmental health well and just seem extremely important, require at least can keep ground, equipment table top totally, forbid dust to be brought in operation room.One-tenth is grouped into: colorant ... 40%
Binder ... 50%
Stopping composition ... 2%
Thinner ... 3%
Anti skinning agent ... 1%
Anti-reverse-printed agent ... 1%
Slip(ping)agent ... 2%
Dispersion agent ... 0,3%
Wetting agent ... 0,2%
Siccative ... 0,3%
Stablizer ... 0,2%.
Claims (6)
1. the formula of ultraviolet light polymerization solder mask comprises pigment and a dyestuff, and pigment divides pigment dyestuff and mineral dye, and the former tone is bright-coloured, strong coloring force, and it is short to put the dry time, so apply comparatively wide in ink, as azo system, the blue or green series pigments of phthalein; The latter's photostabilization, thermotolerance, solvent resistance, hidden power are all better, as titanium white, cadmium red, chrome green, ultramarine etc.;
A kind of formula ultraviolet light polymerization (UV) ink of ultraviolet light polymerization solder mask refers under uviolizing, utilizes the UV-light of different wave length and energy to make ink film forming and dry ink.
2. the formula of ultraviolet light polymerization solder mask utilizes a different UV spectrum, can produce different-energy, and the monomer polymerization in different ink vehicle is become polymkeric substance, so the look film of UV ink has good machinery and chemical property;
The major advantage of UV ink has: (1) is without solvent; (2) rate of drying is fast, and power consumption is few; (3) good luster, bright in luster; (4) water-fast, solvent resistant, wear resisting property is good;
In UV ink, light trigger is that one is subject to light activated compound, after absorb light is shone, be excited into free radical, and energy trasfer, to photosensitivity molecule or photocrosslinking agent, makes UV ink that photocuring reaction occur;
Current UV ink has become a kind of more ripe ink technology, and its pollutant emission is almost nil; Except not containing solvent, UV ink also just like not easily scumming, the advantages such as site is clear, the bright-coloured light of mass colour, and chemical resistance is excellent, low-consuming.
3. the formula state photosensitive solder resist ink of a kind of ultraviolet light polymerization solder mask of liquid, mainly based on the resin of photocuring and thermofixation, coordinates sensitizer, thermal curing agents, filler, colorant and various auxiliary agent composition;
It is coated with by curtain or the method for silk-screen is coated on the substrate after etching, through series of process processes such as preliminary drying, exposure, development, after fixing, finally forms the polymeric coating of a kind of crosslinking curing at printing board surface;
After soldering-resistance layer machines, must reach that strong adhesion, hardness are high, solvent resistant, acid and alkali-resistance, heat-resisting wet goods requirement;
Because technological process is comparatively complicated, therefore not only select solder mask material extremely important, and strict technology control the key point guaranteeing soldering-resistance layer quality especially in process of production;
Must control by strengthening process in each process, the processing quality of guarantee soldering-resistance layer, is both and also will considers other factors;
This ink is two component liquid photosensitive thermohardening type solder mask, should be that host and stiffening agent are modulated by the ratio of 3: 1 in mass ratio, fully stir before using, and leaves standstill 10min, can make after bubble collapse.
4., after the formula of a ultraviolet light polymerization solder mask processes film forming, soldering-resistance layer color is green, and luminance brightness is between highlight type and sub-smooth type, and physicals is good;
A kind of host of formula of ultraviolet light polymerization solder mask and solidifying agent should keep in Dark Place below 25 DEG C, and storage period is 6 months;
Use within storage period, good effect can be obtained;
Temperature: 18 DEG C ~ 25 DEG C;
Relative humidity: 50% ~ 60%;
Clean level: more than 10000 grades;
Safety light: gold-tinted;
Envrionment temperature mainly has an impact to ink viscosity;
Temperature is low, and ink viscosity is large, silk-screen operational difficulty, and soldering-resistance layer thickness increases; Temperature is high, and ink viscosity is low, and mobility is large, and silk-screen welding resistance is lepthymenia, does not reach requirement;
The predrying insufficient or dry rear naturally cooling of silk-screen prebasal plate, can be comparatively large because of ambient relative humidity, causes the substrate moisture absorption again, produces detrimentally affect by the bonding force of coating after silk-screen and copper face situation.
5. under the formula of a ultraviolet light polymerization solder mask causes soldering-resistance layer, Copper Foil is oxidized, and produces blackspot, affects printed board outward appearance; Or during heat-shock, soldering-resistance layer bubbles, comes off;
Therefore, operation room ambient moisture can not be too high, generally should control in 50% ~ 60% relative humidity;
Therefore, the degree of purification of operation room should reach certain grade; In actually operating, if condition does not possess, do environmental health well and just seem extremely important, require at least can keep ground, equipment table top totally, forbid dust to bring in operation room; A kind of system component composition of ultraviolet light polymerization solder mask: colorant ... 40%
Binder ... 50%
Stopping composition ... 2%
Thinner ... 3%
Anti skinning agent ... 1%
Anti-reverse-printed agent ... 1%
Slip(ping)agent ... 2%
Dispersion agent ... 0,3%
Wetting agent ... 0,2%
Siccative ... 0,3%
Stablizer ... 0,2%.
6. the pigment photostabilization of the formula of a ultraviolet light polymerization solder mask, thermotolerance, solvent resistance, hidden power are all better, as titanium white, cadmium red, chrome green, ultramarine etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678623.XA CN104710870A (en) | 2013-12-14 | 2013-12-14 | Ultraviolet curable solder-resist ink |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310678623.XA CN104710870A (en) | 2013-12-14 | 2013-12-14 | Ultraviolet curable solder-resist ink |
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| Publication Number | Publication Date |
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| CN104710870A true CN104710870A (en) | 2015-06-17 |
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| CN201310678623.XA Pending CN104710870A (en) | 2013-12-14 | 2013-12-14 | Ultraviolet curable solder-resist ink |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105368141A (en) * | 2015-12-28 | 2016-03-02 | 李栋军 | UV (ultraviolet) ink |
| CN114023916A (en) * | 2021-10-20 | 2022-02-08 | 业成科技（成都）有限公司 | Curved cover plate preparation method, curved cover plate and electronic equipment |
-
2013
- 2013-12-14 CN CN201310678623.XA patent/CN104710870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105368141A (en) * | 2015-12-28 | 2016-03-02 | 李栋军 | UV (ultraviolet) ink |
| CN114023916A (en) * | 2021-10-20 | 2022-02-08 | 业成科技（成都）有限公司 | Curved cover plate preparation method, curved cover plate and electronic equipment |
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Application publication date: 20150617 |