CN102181019A - Ultraviolet (UV)-curing plasma display circuit protective agent with silver ion migration resistance and preparation method thereof - Google Patents
Ultraviolet (UV)-curing plasma display circuit protective agent with silver ion migration resistance and preparation method thereof Download PDFInfo
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- CN102181019A CN102181019A CN2011100657823A CN201110065782A CN102181019A CN 102181019 A CN102181019 A CN 102181019A CN 2011100657823 A CN2011100657823 A CN 2011100657823A CN 201110065782 A CN201110065782 A CN 201110065782A CN 102181019 A CN102181019 A CN 102181019A
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Abstract
The invention provides an ultraviolet (UV)-curing plasma display circuit protective agent with silver ion migration resistance and a preparation method thereof. The protective agent comprises the following components by mass percent: 20-80wt% of modified (methyl) acrylic prepolymer, 10-60wt% of photoreactive monomer, 0.1-5wt% of processing aid and 0.05-1wt% of silver ion absorbent. In the preparation method, the components are fully dispersed and filtered to obtain the UV-curing plasma display circuit protective agent. The UV-curing plasma display circuit protective agent has the advantages of double synergistic effect of physical coating and silver ion chemical absorption, silver ion migration resistance, normal-temperature curing capability, high production efficiency, energy conservation, good adhesive force, good insulating property, good durability and the like, and is environment-friendly; and the protective agent can be applied to protection and insulation of a plasma display circuit as well as a thick film hybrid integrated circuit, a low noise circuit, a high-stability passive network, a high-frequency linear circuit, a high-precision linear circuit, a microwave circuit, a high-voltage circuit and the like which need to prevent silver ion migration.
Description
Technical field
The invention belongs to plasma display circuit protection agent field, relate to the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent and preparation method thereof.
Background technology
UV-light (UV) curing is often referred to liquid low viscous fluid under the irradiation of ultraviolet light or electron beam, and moment is transformed into the highly cross-linked solid-state material with protection or decoration functions.In recent years assembling is to develop rapidly along with the needs of the progress of UV curing technology and scientific technological advance with the UV cured adhesive.Be used in optical lens, photoconductive fiber, liquid-crystal display (LCD) and the aspect such as sealed.The UV cured adhesive use in assembling, according to the purposes difference extra fine quality requirement is arranged, and it is good and liquid crystal do not had erosion with substrate bonding to require as the LCD panel sealing compound, and fibre-optic bonding requirements volumetric shrinkage is low, and the assurance three-dimensional localization is reliable.The major requirement of plasma display circuit protection agent is: prevent the silver ions migration of electrode and the circuit insulativity that causes is destroyed.Chinese patent CN1789363A " ultraviolet cured adhesive for flat panel display ", and Chinese patent CN1049370A " preparation method of ultraviolet light solid adhesives with liquid crystal sealling " all adopts UV-cured resin that LCD, light-emitting diode display are carried out bonding and encapsulation, and its purpose is to utilize the barrier of UV-cured resin to prevent that liquid crystal and circuit thereof are contaminated.But its environment for use is significantly different with the plasma display circuit; there is not compact arranged distribution of electrodes; do not exist significant silver ions migration to lose efficacy yet; use also discovery by reality, only depend on the requirement that does not reach the plasma display circuit protection of the pure physics coating of UV-cured resin.
At present, two-pack thermoset epoxy resin or silicone rubber seal are adopted in the agent of plasma display circuit protection more, and its construction skill is complicated, and the process-cycle is long, the cost height.Existing research report (the Jin-Sang Hwang that utilizes the UV resin to do the agent of plasma display circuit protection of Korea S; Myeong-Hwan Kim; Dong-Sung Seo; Jong-Woo Won; Doo-Kyung Moon.Microelectronics Reliability, 2009,49 (5); 517-522); but test condition is the dc offset voltage of 100V, 50 ℃, under the 90%RH; test duration is only at 100 hours; its principle is the synthetic urethane acrylate that has soft section of proper ratio and hard section, and raising sticking power prevents the infiltration of aqueous vapor; just optimization design the UV resin, improve the effect that its pure physics coats.Along with plasma display does more, integrated level is higher, and its test duration has reached more than 200 hours, only depends on pure physics to coat the requirement that has not reached the plasma display electrode protection.
The silver conductor electrode is an important component part in the plasma display unicircuit, in circuit, play active part interconnection line, multilayer wiring, outside paste effects such as components and parts.Because the raising of circuit level, in current large screen display, the most tiny silver electrode part can reach 256 distribution of electrodes on the circuit chip of 40mm, and the spacing of per two silver electrodes is about 70 μ m.But the silver ions migration very easily takes place in the silver conductor electrode under conditions such as moist and voltage bias, change dielectric property, reduces insulation resistance, and then causes short circuit and inefficacy.
Silver ions moves under the environment that occurs in normal temperature, humidity (temperature, humidity are high more typical more), is the topmost failure mode of plasma display circuit.No matter what insulate with in the gap of conductor, as long as conductor absorbs enough moistures from environment on every side, under the effect of volts DS bias field, the silver ions that silver ionization is come out can pass through adsorbed water layer, move to negative electrode by anode, thereby become silver or form silver suboxide, between two electrodes, produce the material of palpus shape, black in cathodic reduction, cause forming between two electrodes silver-colored bridge, circuit performance descends and lost efficacy.It is reported that the fine silver conductor only needs the several seconds just can observe the black precipitate (Ag that migration produces under deionized water and bias voltage effect
2O) formation.And two-pack thermosetting epoxy resin or silicone rubber seal are adopted in plasma display circuit protection agent now more, and curing cycle reaches 30-60 minute, and shaping cycle is long, and efficient is low, the cost height.And make protective material with the UV-cured resin circuit insulating coating of having reported; because its cross-linking density, flexibility, high adhesive force can't be taken into account; and only play the effect that pure physics coats; under high temperature, high humidity; the infiltration of aqueous vapor still easily produces the silver ions migration, and such UV-cured resin protection can't reach the requirement of plasma display circuit protection agent.
Summary of the invention
In view of the deficiency that prior art exists, the objective of the invention is to improve, thereby the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent and preparation method thereof is provided by composition to the insulation protection agent of ultraviolet light polymerization.Compare with existing two-pack thermosetting epoxy resin or silicon rubber protective material, protective material of the present invention have curing speed fast (3-30 second), energy consumption low, pollute little advantage.Compare with existing UV-cured resin electronics glue paste; protective material of the present invention has physics and coats the double dominant of adsorbing with the silver ions chemistry; show as and can make the plasma display unicircuit that the silver ions migration be difficult for to take place, moisture resistance, temperature shock are good, the circuit long service life.
The object of the present invention is achieved like this:
The agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection is characterized in that: the component that comprises following percentage composition:
Wherein said silver ions absorption agent is one or more of hydrotalcite-like anionic type lamellar compound.
Described hydrotalcite-like anionic type lamellar compound has [M
1-x 2+M
x 3+(OH)
2]
X+(A
N-)
X/nMH
2O structure, wherein M
2+Be Mg
2+, Mn
2+, Fe
2+, Ni
2+, Cu
2+, Co
2+, Zn
2+, Ca
2+M
3+Be Al
3+, Cr
3+, Fe
3+, Mn
3+, Co
3+A
N-Be CO
3 2-, NO
3-, Cl
-, OH
-, SO
4 2-, PO
4 3-, C
6H
4(COO)
2 2-X is M in every mole of hydrotalcite-based compound
3+Molar fraction, 0.2≤x≤0.33, m is the mole number of the crystal water in every mole of hydrotalcite-based compound, 0.1≤x≤0.6.
Described (methyl) acrylic acid modified prepolymer is one or more the mixture in epoxy (methyl) acrylate or urethane (methyl) acrylate.
Described photoreactivity monomer is selected from following one or more:
(1) simple function group monomer: butyl acrylate, Isooctyl acrylate monomer, isodecyl acrylate, lauryl acrylate, (methyl) Hydroxyethyl acrylate, (methyl) Propylene glycol monoacrylate, glycidyl methacrylate, isobornyl methacrylate, methacrylic acid tetrahydrofuran (THF) methyl esters, N-vinyl pyrrolidone;
(2) two monomers: tri (propylene glycol) diacrylate, dipropylene glycol diacrylate, 1,6-hexanediyl ester, 1,4 butanediol diacrylate, neopentylglycol diacrylate, polyethyleneglycol diacrylate, two (Diethylene Glycol) diacrylates of phthalic acid;
(3) polyfunctional monomer: Viscoat 295, ethoxyquin Viscoat 295, pentaerythritol triacrylate, tetramethylol methane tetraacrylate, two contract trimethylolpropane tetra-acrylate, double pentaerythritol C5 methacrylate, double pentaerythritol methacrylate.
Described light trigger is selected from following one or more: α; the basic benzil ketals of α '-two or four; α; α '-diethoxy acetophenone; 2-hydroxyl-2 methyl isophthalic acids-phenyl-acetone; the 1-hydroxy cyclohexyl phenylketone; 2-hydroxyl-2 methyl isophthalic acid-to hydroxyethyl ether phenyl-acetone; 2-methyl isophthalic acid-(4-first sulfydryl phenyl)-2-morpholine-1-acetone; two (2; 4; the 6-trimethylbenzoyl) phenyl phosphine oxide; 2; 4; 6-trimethylbenzoyl diphenyl phosphine oxide; 2; 4,6-trimethylbenzoyl ethenylphenyl phosphine oxide; benzophenone; isopropyl thioxanthone; 4-dimethyl ethyl aminobenzoate and triethylamine.
Described processing aid is made up of the following component that accounts for the protective material total amount:
Described flow agent is selected from following one or more: BYK306, BYK307, BYK358, Tego Rad 2100, Tego Glide 245; Described defoamer is selected from following one or more: BYK052, BYK055, DOW CORNING defoamer 1400,1500, DOW CORNING 7 additives; Described wetting agent is selected from following one or more: Tego Wet KL 435, DOW CORNING Q2-5211; Described adhesion promoter is selected from following one or more: γ-An Jibingjisanyiyangjiguiwan, γ-(methacryloxy) propyl trimethoxy silicane, vinyltriethoxysilane, epoxy radicals silicone hydride, 3-glycidyl ether oxygen base oxypropyl trimethyl silane.
The present invention also provides the preparation method of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent, comprises the steps:
(1) the silver ions absorption agent that will account for total system 10-60wt% photoreactivity monomer and 0.05-1wt% under the room temperature mixes, by making the homogeneous solution system under grinding of three rollers or the ultra-sonic dispersion effect;
(2) in the solution system of step (1) preparation, add and account for the light trigger of total system 2-8wt% and the processing aid of 0.1-5wt%, fully stir or the ultra-sonic dispersion effect under until dissolving fully;
(3) under 30-70 ℃, in the solution system of step (2) preparation, add (methyl) the acrylic acid modified prepolymer that accounts for total system 30-80wt% again, fully stir, filter, promptly get the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.
The ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection of the present invention agent can adopt modes such as spraying, showering or brushing to construct, and promptly finishes the seal process of circuit under the room temperature second with the medium pressure mercury lamp irradiation 3-30 of 400-2000W.
Compared with prior art; the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent that the present invention relates to and preparation method thereof has following advantage and obvious improvement: add the silver ions absorption agent in protectant material design; because it has special negatively charged ion interchangeability, absorption, reduction catalysts performance; in UV-cured resin, can exchange CO effectively
3 2-, NO
3-, Cl
-, OH
-In negative ion, suppressed Ag
+Move by the orientation of anode to negative electrode; its intensive adsorbs Ag+ and reducing catalysis action simultaneously; the generation that has further limited Ag+ reaches moves; thereby produce the chemoproection effect of typical anti-silver ions migration; and can coat with the physics of UV-cured resin and produce dual function, thereby have advantages such as anti-silver ions migration, ambient cure, production efficiency height, environmental protection and energy saving, good sticking power, good insulation preformance, good endurance.Compare with existing two-pack thermosetting epoxy resin or silicon rubber protective material, protective material of the present invention have curing speed fast (3-30 second), energy consumption low, pollute little advantage.Compare with existing UV-cured resin electronics glue paste; protective material of the present invention has physics and coats the double dominant of adsorbing with the silver ions chemistry; show as and can make the plasma display unicircuit that the silver ions migration be difficult for to take place, moisture resistance, temperature shock are good, the circuit long service life.In addition; the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection of the present invention agent can be applicable to the plasma display circuit, also can be applicable to prevent the protection and the insulation of the thick film hybrid integrated circuit, low noise circuit, high stability passive network, high frequency linearity circuit, High Precision Linear, microwave circuit, high-tension circuit etc. of silver ions migration.
Description of drawings
Fig. 1 is the use synoptic diagram of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent
1-ultraviolet light polymerization protective material 2-silver electrode 3-substrate
Fig. 2 is the electrode Photomicrograph of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent of use embodiment 1, and no tangible silver ions transport phenomena takes place between silver electrode as can be seen;
Fig. 3 is for using the electrode Photomicrograph (dc offset voltage of test condition: 100V of two-pack heat-curable epoxy resin physics cladded type protective material (25 ℃ solidified 12 hours down); 50 ℃; under the 90%RH; test duration is 200 hours), significant silver ions transport phenomena appears between silver electrode as can be seen.
Embodiment
The preparation method of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent that the present invention relates to comprises the steps:
(1) the silver ions absorption agent that will account for total system 10-60wt% photoreactivity monomer and 0.05-1wt% under the room temperature mixes, by making the homogeneous solution system under grinding of three rollers or the ultra-sonic dispersion effect;
(2) in the solution system of step (1) preparation, add and account for the light trigger of total system 2-8wt% and the processing aid of 0.1-5wt%, fully stir or the ultra-sonic dispersion effect under until dissolving fully;
(3) under 30-70 ℃, in the solution system of step (2) preparation, add (methyl) the acrylic acid modified prepolymer that accounts for total system 30-80wt% again, fully stir, filter, promptly get the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.
Need to prove that under the situation that does not break away from purport of the present invention, light-cured resin component and silver ions absorption agent can have various variations.Therefore, Shuo Ming embodiment is an example here, and the scope of putting down in writing in the Patent right requirement of the present invention is not limited to this.
According to the preparation method of the above-mentioned ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent, prepare the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.It is thick to be coated on the silver electrode that spacing is 70 μ m about 1mm, and the irradiation of 1000W medium pressure mercury lamp was solidified 15 seconds; The dc offset voltage of test condition: 100V, 50 ℃, under the 90%RH, the test duration is 200 hours, does not have tangible silver ions transport phenomena, referring to Fig. 2.
According to the preparation method of the above-mentioned ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent, prepare the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.It is thick to be coated on the silver electrode that spacing is 70 μ m about 1mm, and the irradiation of 1000W medium pressure mercury lamp was solidified 20 seconds; The dc offset voltage of test condition: 100V, 50 ℃, under the 90%RH, the test duration is 200 hours, does not have tangible silver ions transport phenomena.
According to the preparation method of the above-mentioned ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent, prepare the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.It is thick to be coated on the silver electrode that spacing is 70 μ m about 1mm, and the irradiation of 1000W medium pressure mercury lamp was solidified 10 seconds; The dc offset voltage of test condition: 100V, 50 ℃, under the 90%RH, the test duration is 200 hours, does not have tangible silver ions transport phenomena.
Embodiment 4
According to the preparation method of the above-mentioned ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent, prepare the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.It is thick to be coated on the silver electrode that spacing is 70 μ m about 1mm, and the irradiation of 1000W medium pressure mercury lamp was solidified 15 seconds; The dc offset voltage of test condition: 100V, 50 ℃, under the 90%RH, the test duration is 200 hours, does not have tangible silver ions transport phenomena.
Claims (8)
1. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent is characterized in that: the component that comprises following percentage composition:
Wherein said silver ions absorption agent is one or more of hydrotalcite-like anionic type lamellar compound.
2. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection as claimed in claim 1 agent is characterized in that: described hydrotalcite-like anionic type lamellar compound has [M
1-x 2+M
x 3+(OH)
2]
X+(An
-)
X/nMH
2O structure, wherein M
2+Be Mg
2+, Mn
2+, Fe
2+, Ni
2+, Cu
2+, Co
2+, Zn
2+, Ca
2+M
3+Be Al
3+, Cr
3+, Fe
3+, Mn
3+, Co
3+A
N-Be CO
3 2-, NO
3-, Cl
-, OH
-, SO
4 2-, PO
4 3-, C
6H
4(COO)
2 2-X is M in every mole of hydrotalcite-based compound
3+Molar fraction, 0.2≤x≤0.33, m is the mole number of the crystal water in every mole of hydrotalcite-based compound, 0.1≤x≤0.6.
3. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection as claimed in claim 1 agent is characterized in that: described (methyl) acrylic acid modified prepolymer is one or more the mixture in epoxy (methyl) acrylate or urethane (methyl) acrylate.
4. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection as claimed in claim 1 agent is characterized in that: described photoreactivity monomer is selected from following one or more:
(1) simple function group monomer: butyl acrylate, Isooctyl acrylate monomer, isodecyl acrylate, lauryl acrylate, (methyl) Hydroxyethyl acrylate, (methyl) Propylene glycol monoacrylate, glycidyl methacrylate, isobornyl methacrylate, methacrylic acid tetrahydrofuran (THF) methyl esters, N-vinyl pyrrolidone;
(2) two monomers: tri (propylene glycol) diacrylate, dipropylene glycol diacrylate, 1,6-hexanediyl ester, 1,4 butanediol diacrylate, neopentylglycol diacrylate, polyethyleneglycol diacrylate, two (Diethylene Glycol) diacrylates of phthalic acid;
(3) polyfunctional monomer: Viscoat 295, ethoxyquin Viscoat 295, pentaerythritol triacrylate, tetramethylol methane tetraacrylate, two contract trimethylolpropane tetra-acrylate, double pentaerythritol C5 methacrylate, double pentaerythritol methacrylate.
5. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection as claimed in claim 1 agent; it is characterized in that: described light trigger is selected from following one or more: α; the basic benzil ketals of α '-two or four; α; α '-diethoxy acetophenone; 2-hydroxyl-2 methyl isophthalic acids-phenyl-acetone; the 1-hydroxy cyclohexyl phenylketone; 2-hydroxyl-2 methyl isophthalic acid-to hydroxyethyl ether phenyl-acetone; 2-methyl isophthalic acid-(4-first sulfydryl phenyl)-2-morpholine-1-acetone; two (2; 4; the 6-trimethylbenzoyl) phenyl phosphine oxide; 2; 4; 6-trimethylbenzoyl diphenyl phosphine oxide; 2; 4,6-trimethylbenzoyl ethenylphenyl phosphine oxide; benzophenone; isopropyl thioxanthone; 4-dimethyl ethyl aminobenzoate and triethylamine.
6. the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection as claimed in claim 1 agent, it is characterized in that: described processing aid is made up of the following component that accounts for the protective material total amount:
7. protective material as claimed in claim 6 is characterized in that: described flow agent is selected from following one or more: BYK306, BYK307, BYK358, Tego Rad 2100, Tego Glide 245; Described defoamer is selected from following one or more: BYK052, BYK055, DOW CORNING defoamer 1400,1500, DOW CORNING 7 additives; Described wetting agent is selected from following one or more: Tego Wet KL 435, DOW CORNING Q2-5211; Described adhesion promoter is selected from following one or more: γ-An Jibingjisanyiyangjiguiwan, γ-(methacryloxy) propyl trimethoxy silicane, vinyltriethoxysilane, epoxy radicals silicone hydride, 3-glycidyl ether oxygen base oxypropyl trimethyl silane.
8. the preparation method of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection agent is characterized in that: comprise the steps:
(1) the silver ions absorption agent that will account for total system 10-60wt% photoreactivity monomer and 0.05-1wt% under the room temperature mixes, by making the homogeneous solution system under grinding of three rollers or the ultra-sonic dispersion effect;
(2) in the solution system of step (1) preparation, add and account for the light trigger of total system 2-8wt% and the processing aid of 0.1-5wt%, fully stir or the ultra-sonic dispersion effect under until dissolving fully;
(3) under 30-70 ℃, in the solution system of step (2) preparation, add (methyl) the acrylic acid modified prepolymer that accounts for total system 30-80wt% again, fully stir, filter, promptly get the agent of the ultraviolet light polymerization migration-type of anti-silver ions plasma display circuit protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065782.3A CN102181019B (en) | 2011-03-18 | 2011-03-18 | Ultraviolet (UV)-curing plasma display circuit protective agent with silver ion migration resistance and preparation method thereof |
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|---|---|---|---|
| CN201110065782.3A CN102181019B (en) | 2011-03-18 | 2011-03-18 | Ultraviolet (UV)-curing plasma display circuit protective agent with silver ion migration resistance and preparation method thereof |
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| CN102181019B CN102181019B (en) | 2014-08-13 |
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| CN102676040A (en) * | 2012-02-28 | 2012-09-19 | 常州天合光能有限公司 | Solar component circuit protective agent and battery piece connecting structure applying same |
| CN105158615A (en) * | 2015-09-29 | 2015-12-16 | 长沙市宇顺显示技术有限公司 | Touch screen sensor testing circuit |
| CN105158616A (en) * | 2015-09-29 | 2015-12-16 | 长沙市宇顺显示技术有限公司 | Touch screen sensor testing circuit |
| CN107251650A (en) * | 2015-09-24 | 2017-10-13 | 积水化学工业株式会社 | The manufacture method of electronic device sealant and electronic device |
| EP3539924A1 (en) * | 2018-03-14 | 2019-09-18 | ETH Zurich | Novel vinyl phosphines and photo-initiators obtainable therefrom |
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| CN1789363A (en) * | 2005-12-02 | 2006-06-21 | 西安瑞联近代电子材料有限责任公司 | Preparation method of ultraviolet cured adhesive for flat panel display |
| CN1965267A (en) * | 2004-05-26 | 2007-05-16 | 昭和电工株式会社 | Photosensitive resin composition, and cured product and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102676040A (en) * | 2012-02-28 | 2012-09-19 | 常州天合光能有限公司 | Solar component circuit protective agent and battery piece connecting structure applying same |
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| CN107251650B (en) * | 2015-09-24 | 2021-06-01 | 积水化学工业株式会社 | Sealing agent for electronic device and method for manufacturing electronic device |
| CN105158615A (en) * | 2015-09-29 | 2015-12-16 | 长沙市宇顺显示技术有限公司 | Touch screen sensor testing circuit |
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| CN105158615B (en) * | 2015-09-29 | 2018-04-20 | 长沙市宇顺显示技术有限公司 | Touch screen induction device test circuit |
| CN105158616B (en) * | 2015-09-29 | 2018-05-01 | 长沙市宇顺显示技术有限公司 | A kind of touch screen induction device test circuit |
| EP3539924A1 (en) * | 2018-03-14 | 2019-09-18 | ETH Zurich | Novel vinyl phosphines and photo-initiators obtainable therefrom |
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| Publication number | Publication date |
|---|---|
| CN102181019B (en) | 2014-08-13 |
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