CN107969066B - The method for preparing stretchable circuit using oil-water interfaces reaction inkjet printing - Google Patents
The method for preparing stretchable circuit using oil-water interfaces reaction inkjet printing Download PDFInfo
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- CN107969066B CN107969066B CN201711276197.1A CN201711276197A CN107969066B CN 107969066 B CN107969066 B CN 107969066B CN 201711276197 A CN201711276197 A CN 201711276197A CN 107969066 B CN107969066 B CN 107969066B
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- oil
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- water interfaces
- inkjet printing
- stretchable circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
- H05K3/1241—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by ink-jet printing or drawing by dispensing
- H05K3/125—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by ink-jet printing or drawing by dispensing by ink-jet printing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/0283—Stretchable printed circuits
Abstract
The present invention provides a kind of method for preparing stretchable circuit using oil-water interfaces reaction inkjet printing comprising following steps: S1, constructs patterned oil-water interfaces system using inkjet printing；Prepared by S2, oil-water interfaces oil-in-water emulsified layer, surfactant is added in the conductive presoma water-based ink in S1, and apply shearing force to oil-water interfaces, obtain stable oil-in-water emulsified layer；S3, oil-water interfaces reaction generate the composite construction of metal package elastomeric polymer；The composite construction that S4, the metal obtained using S3 wrap up elastomeric polymer forms stretchable circuit, and carries out electric conductivity test to the electric property of stretchable circuit, obtains the stretchable circuit of best performance.The present invention, which reacts oil-water interfaces, to be combined with inkjet printing technology, can rapid large-area realize the fine preparation of stretchable circuit, flexible extensible electronic device is manufactured and is of great significance.
Description
Technical field
Application the present invention relates to printing manufacturing technology in flexible electronic field utilizes oil-water interfaces more particularly to a kind of
The method that reaction inkjet printing prepares stretchable circuit.
Background technique
In recent years, research of the inkjet printing technology in terms of pattern of functional material has received widespread attention.With it is traditional
Pattern of functional material technology is compared, and inkjet printing technology is that ink is deposited directly to specific region, does not need mask and exposure
Photoengraving has saved cost and has greatly reduced pollution.Meanwhile inkjet printing technology be also equipped with flexibly, rapidly, continuously large area
Preparation, environmental suitability is strong, adapts to the advantages such as different substrate materials.
With inkjet printing technology deepening continuously in terms of patterns of high precision preparation research, in green plate-making, monocrystalline
Film, transistor, histoorgan, solar battery, biochip, RFID antenna and sensor etc. achieve it is important into
Exhibition.It is by conductive material (metal nanoparticle, carbon material, conductive presoma etc.) dispersion or molten that inkjet printing, which prepares electronic circuit,
Solution is made conductive ink in a solvent, and the benefit printer spray orifice that computerizeds control sprays conductive ink droplet, realizes and schemes in substrate surface
Caseization deposition, obtains required conductive pattern.But the combination of the conductive material of inkjet printing and substrate is in certain bending
It is easy to be destroyed under curvature, conductive material is made to be easy to generate slight crack or peeling from substrate.Meanwhile conductive material is higher
Hardness and brittleness tend not to meet electronic circuit in the application requirement of stretchable aspect.
Currently, the fusion of the energy of man-machine interface, information is played increasingly in terms of improving human life quality with interacting
Important role, flexible extensible electronic device is in fields such as wearable, Flexible Displays, life medical treatment, Internet of Things, intelligent instruments
Application demand constantly increases.Therefore, inkjet printing prepares when one kind bends under external force, folds and stretches and remains to protect
The stretchable circuit for holding stable electrical properties has important research meaning and application value.
Composite conducting slurry needs to be added a large amount of viscoelastic material to reach good electric conductivity and tensility, this
Obviously it is not able to satisfy the rheological property requirement of ink-jet printing ink, is difficult to realize the fine system of stretchable circuit in practical applications
It is standby.Therefore, develop that a kind of by inkjet printing conductive ink to be directly realized by conductive material and elastomeric polymer in circuit compound
Method has important research meaning for flexible, quick, large area the fine preparation for realizing stretchable circuit and applies valence
Value.
Summary of the invention
In order to overcome the drawbacks of the prior art, the present invention provide it is a kind of using oil-water interfaces reaction inkjet printing preparation can draw
The method of circuit is stretched, the liquid elastomer prepolymer oiliness substrate of reproducibility is utilized, conductive presoma water-based ink constructs grease
Inkjet printing system is reacted, interfacial reaction is carried out in the oil-water interfaces emulsion layer of formation, realizes that metal wraps up elastomeric polymer
Composite construction, inkjet printing prepares stretchable circuit.
The present invention is implemented as follows: the present invention provide it is a kind of using oil-water interfaces reaction inkjet printing prepare stretchable electricity
The method on road comprising following steps:
S1, patterned oil-water interfaces system is constructed using inkjet printing, prepares reproducibility liquid prepolymer oiliness substrate,
In reproducibility liquid prepolymer oiliness substrate surface inkjet printing conduction presoma water-based ink, patterned oil-water interfaces are constructed
System；
Prepared by S2, oil-water interfaces oil-in-water emulsified layer, add surface-active in the conductive presoma water-based ink in S1
Agent, and shearing force is applied to oil-water interfaces, obtain stable oil-in-water emulsified layer；
S3, oil-water interfaces reaction generate metal composite structure, apply temperature to the stable oil-in-water emulsified layer that S2 is obtained
The reduction reaction that metal ion occurs in water-oil interface for control, conductive presoma water-based ink and surfactant generates continuous
Metal layer, after solidifying to reproducibility liquid prepolymer oiliness substrate, obtain metal package elastomeric polymer composite junction
Structure；
The composite construction that S4, the metal obtained using S3 wrap up elastomeric polymer forms stretchable circuit, and to stretchable
The electric property of circuit carries out electric conductivity test, and carries out multi-drawing to circuit, carries out to the electric conductivity in drawing process
Test, and then by changing the control parameter in preparation process, obtain the stretchable circuit of best performance.
Preferably, shearing force is applied to oil-water interfaces using micro- ultrasound in S2.
Preferably, temperature regulation is changed in S3 between 30 DEG C to 90 DEG C, acquisition can with different electric properties
Stretch circuit.
Preferably, regulate and control metal composite using interfacial reaction temperature, reactant concentration and kinds of surfactants in S4
The composition and thickness of structure obtain the relationship of metal composite structure and its electric property that oil-water interfaces reaction generates, and selection is most
The stretchable circuit of excellent gain of parameter best performance.
Preferably, in S4 at 70 DEG C, the electric property of the metal composite structure is the most stable, and prepared structure is the most
Uniform, conductivity is consistent under stretching condition, reduces or reduce temperature, the metal composite conductive structure of formation, with drawing
The variation for having electric property is stretched, and temperature departure is bigger, electric property is bigger with the variation of level of stretch.
Preferably, in S1 reproducibility liquid prepolymer oiliness substrate preparation the following steps are included:
Elastomeric prepolymer is chosen, then makes mass fraction of the reducing agent in liquid prepolymer oiliness substrate by a certain percentage
8%-12%, is subject to the viscoelastic fluid flow behavior for not influencing substrate；
The reducing agent of the functional group containing reproducibility is added thereto, obtains mixture, spin coating or extrusion said mixture preparation
Reproducibility liquid elastomer prepolymer oiliness substrate.
Preferably, the substrate of initiator preparation is uniformly added in S1 for the dimethyl silicone polymer by thermohardening type, is needed
It wants under normal pressure, is carried out precuring 7-8 minutes in 70 DEG C of baking oven, obtain certain viscoelastic mobility substrate.
Preferably, in S1 construct pattern carburetion water termination system the following steps are included:
The surface tension matching for adjusting ink-jet ink and printed substrates plays prepared conductive precursor ink injection
Print machine print cartridge completes patterning in the mobility oil pattern that mutually reduction substrate surface inkjet printing is set using fine spray head
Oil-water interfaces building.
Preferably, elastomeric prepolymer is that initiator preparation is uniformly added by the dimethyl silicone polymer of thermohardening type.
Preferably, the reducing agent in S1 is the compound containing aldehyde radical.
Compared with prior art, the invention has the following advantages:
The present invention is the liquid elastomer prepolymer oiliness substrate using reproducibility, conductive presoma water-based ink, building oil
Water reacts inkjet printing system, and interfacial reaction is carried out in the oil-water interfaces emulsion layer of formation, realizes that metal wraps up flexible polymer
The composite construction of object, inkjet printing prepare stretchable circuit.The present invention reacts oil-water interfaces to be combined with inkjet printing technology,
Can rapid large-area realize the fine preparation of stretchable circuit, be of great significance for the manufacture of flexible extensible electronic device.
Meanwhile the method for a kind of composite construction preparation and regulation is proposed, the efficiency for preparing Stretch material has been greatly improved, has been one
The new method of kind high performance material manufacture.
Detailed description of the invention
Fig. 1 is the flow chart that the present invention prepares stretchable circuit methods；
Fig. 2 is that inkjet printing constructs oil-water interfaces reaction system schematic diagram in the embodiment of the present invention；
Fig. 3 is that metal composite structure promotes the stretchable impact of performance figure of circuit in the embodiment of the present invention.
Specific embodiment
Below with reference to the attached drawing exemplary embodiment that the present invention will be described in detail, feature and aspect.It is identical attached in attached drawing
Icon note indicates element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, unless special
It does not point out, it is not necessary to attached drawing drawn to scale.
The present invention provides a kind of method for preparing stretchable circuit using oil-water interfaces reaction inkjet printing comprising following
Step:
S1, patterned oil-water interfaces system is constructed using inkjet printing, prepares reproducibility liquid prepolymer oiliness substrate,
In reproducibility liquid prepolymer oiliness substrate surface inkjet printing conduction presoma water-based ink, patterned oil-water interfaces are constructed
System.
In S1 reproducibility liquid prepolymer oiliness substrate preparation the following steps are included:
Elastomeric prepolymer is chosen, then makes mass fraction of the reducing agent in liquid prepolymer oiliness substrate by a certain percentage
8%-12%, is subject to the viscoelastic fluid flow behavior for not influencing substrate；The reducing agent of the functional group containing reproducibility is added thereto, obtains
To mixture, spin coating or extrusion said mixture prepare reproducibility liquid elastomer prepolymer oiliness substrate.
Preferably, the substrate of initiator preparation is uniformly added in S1 for the dimethyl silicone polymer by thermohardening type, is needed
It wants under normal pressure, is carried out precuring 7-8 minutes in 70 DEG C of baking oven, obtain certain viscoelastic mobility substrate.
Prepared by S2, oil-water interfaces oil-in-water emulsified layer, add surface-active in the conductive presoma water-based ink in S1
Agent using micro- ultrasound and applies shearing force to oil-water interfaces, obtains stable oil-in-water emulsified layer.
S3, oil-water interfaces reaction generate metal composite structure, apply temperature to the stable oil-in-water emulsified layer that S2 is obtained
The reduction reaction that metal ion occurs in water-oil interface for control, conductive presoma water-based ink and surfactant generates continuous
Metal layer, after solidifying to reproducibility liquid prepolymer oiliness substrate, obtain metal package elastomeric polymer composite junction
Structure；Temperature regulation is changed in S3 between 30 DEG C to 90 DEG C, obtains the stretchable circuit with different electric properties.
The composite construction that S4, the metal obtained using S3 wrap up elastomeric polymer forms stretchable circuit, and to stretchable
The electric property of circuit carries out electric conductivity test, and carries out multi-drawing to circuit, carries out to the electric conductivity in drawing process
Test, and then by changing the control parameter in preparation process, obtain the stretchable circuit of best performance.
Interfacial reaction temperature, the group of reactant concentration and kinds of surfactants regulation metal composite structure are utilized in S4
At and thickness, obtain oil-water interfaces reaction generate metal composite structure and its electric property relationship, select optimized parameter obtain
Obtain the stretchable circuit of best performance.
In S4 at 70 DEG C, the electric property of the metal composite structure is the most stable, and prepared structure is the most uniform, draws
Conductivity is consistent under the conditions of stretching, and reduces or reduce temperature, the metal composite conductive structure of formation, as stretching has electricity
The variation of performance is learned, and temperature departure is bigger, electric property is bigger with the variation of level of stretch.
Specific embodiment in conjunction with the Content Implementation of attached drawing Fig. 1, during the present invention will be described in detail.
The specific implementation method of the preparation of conductive presoma water-based ink is to be directed to different conductive metal materials, such as gold,
Silver, copper select the conductive presoma water-based ink of different conductive presomas formation soluble in water.According to " coalescence rate theory " choosing
The stronger surfactant of hydrophily is selected to be added in conductive presoma water-based ink as emulsifier.
The specific implementation method of the preparation of reproducibility liquid elastomer prepolymer oiliness substrate is to choose different types of elasticity
Prepolymer uniformly adds initiator such as the dimethyl silicone polymer of thermohardening type, then is added thereto containing reduction by a certain percentage
The reducing agent of property functional group, such as containing the compound of aldehyde radical.Spin coating squeezes out said mixture preparation reproducibility liquid elastomer pre-polymerization
Object oiliness substrate, precuring regular hour obtain different viscoelastic mobility substrates.
The present invention also provides the methods that inkjet printing constructs patterned oil-water interfaces system, specifically real in conjunction with attached drawing Fig. 2
Applying content is to adjust the surface tension matching of ink-jet ink and printed substrates, and prepared conductive precursor ink injection is beaten
Print machine print cartridge, using fine spray head, the pattern set by mobility oil mutually reduction substrate surface inkjet printing computer, i.e.,
Complete patterned oil-water interfaces building.In Fig. 2,1 is conductive presoma water-based ink, and 2 be reproducibility liquid elastomer prepolymer
Oiliness substrate, 3 be emulsion layer, and 4 be the conductive presoma of water phase, and 5 mutually restore substrate for oil.
The specific implementation method of the stable oil-in-water emulsified layer preparation of oil-water interfaces is the benefit under micro- ultrasonic mechanical shear stress
Make conductive precursor water solution that emulsification occur to the oiliness substrate of mobility with emulsifier, forms oil-in-water emulsion layer.
To form the emulsion layer in continuous water phase including a large amount of oiliness drops at oil-water interfaces.
It is control grease system temperature using the specific implementation method that oil-water interfaces react generation metal composite structure, makes to lead
The reduction reaction that metal ion occurs on oil-water interfaces for electric presoma and reducing agent generates continuous metal layer.Finally, pre-
After polymers solidification, it is based on oil-water interfaces emulsion layer and interfacial reaction, realizes the composite construction of metal package elastomeric polymer.Cause
This, metal composite structure is that the continuous cured elasticity of metal layer package of interfacial reaction generation occurs by oil-water interfaces emulsion layer to gather
Close what object was constituted.
It also needs to construct the stretchable circuit of metal composite structure and electronic device in implementation of the invention, content is embodied
It is the composition and thickness using the factors such as interfacial reaction temperature, reactant concentration, kinds of surfactants regulation metal composite structure
Degree.The relationship for obtaining oil-water interfaces the reaction metal composite structure generated and performance, promotes the application performance of stretchable circuit.Base
Prepare stretchable circuit in oil-water interfaces reaction inkjet printing metal composite structure, realization electronic circuit labels, electronic skin,
Application in the stretchable electronic device such as Flexible Displays.
Specific embodiment:
1. dimethyl silicone polymer substrate is mixed formic acid leaf-alcohol ester as reducing agent liquid oil phase substrate.
2. 30% ammonia aqueous solution is diluted five times, slowly to nitre by silver nitrate with 10% concentration obtained aqueous solution
It is added dropwise in sour silver solution, until disappear after precipitating appearance again, stops dropwise addition and obtain silver-colored ammonia precursor ink accordingly.
3. using ink-jet printing apparatus carry out route printing, to oiliness can precuring liquid substrate carry out precuring processing,
At 70 degrees Celsius, kept for 8 minutes under normal pressure.
It is reacted 4. the oil-water interfaces system of ink jet printing is placed on 30 DEG C to 90 DEG C of warm table, obtains metal
The different stretchable circuit of composite construction.
5. changing content silver-colored in ink-jet precursor ink, controlled from 5%-20% mass fraction, ink jet printing respectively
Temperature parameter obtains the different stretchable circuit of metal composite structure.
6. changing the type of the surfactant in ink-jet ink, such as polyethylene glycol, ethylene glycol, glycol monoethyl ether, divide
Not Zuo Wei surfactant, temperature, content silver-colored in precursor ink are controlled in ink jet printing, it is different to obtain metal composite structure
The stretchable circuit of sample.Fig. 3 is that metal composite structure promotes the stretchable impact of performance figure of circuit in the embodiment of the present invention.
7. for precursor ink mass concentration 10%, surfactant is the condition of polyethylene glycol for temperature at 70 DEG C
The stretchable circuit of the ink jet printing of formation, circuit is bent, stretchable excellent performance, as the printed electronic under stress condition
Skin device.
8 are directed to temperature at 50 DEG C, and for precursor ink mass concentration 20%, surfactant is the condition shape of polyethylene glycol
At the stretchable circuit of ink jet printing, circuit is bent, with micro-nano composite conductive layers, as flexible super capacitor
Collector and electrode activation material, all print prepare flexible super capacitor.
Finally, it should be noted that above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to part of or all technical features into
Row equivalent replacement；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of method for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, it is characterised in that: it includes following
Step:
S1, patterned oil-water interfaces system is constructed using inkjet printing: preparation reproducibility liquid prepolymer oiliness substrate, also
Originality liquid prepolymer oiliness substrate surface inkjet printing conduction presoma water-based ink, constructs patterned oil-water interfaces body
System；
S2, the preparation of oil-water interfaces oil-in-water emulsified layer: adding surfactant in the conductive presoma water-based ink in S1, and
Shearing force is applied to oil-water interfaces, obtains stable oil-in-water emulsified layer；
S3, oil-water interfaces reaction generate the composite construction of metal package elastomeric polymer: the stable oil-in-water cream obtained to S2
Change layer and apply temperature control, the reduction of metal ion occurs in water-oil interface for conductive presoma water-based ink and surfactant
Reaction generates continuous metal layer, and after solidifying to reproducibility liquid prepolymer oiliness substrate, it is poly- to obtain metal package elasticity
Close the composite construction of object；
The composite construction that S4, the metal obtained using S3 wrap up elastomeric polymer forms stretchable circuit, and to stretchable circuit
Electric property carry out electric conductivity test, and to circuit carry out multi-drawing, the electric conductivity in drawing process is tested,
And then by changing the control parameter in preparation process, the stretchable circuit of best performance is obtained.
2. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
It is: shearing force is applied to oil-water interfaces using micro- ultrasound in S2.
3. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
It is: is changed temperature regulation in S3 between 30 DEG C to 90 DEG C, obtains the stretchable circuit with different electric properties.
4. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
It is: utilizes the composition of interfacial reaction temperature, reactant concentration and kinds of surfactants regulation metal composite structure in S4
And thickness, the relationship of metal composite structure and its electric property that oil-water interfaces reaction generates is obtained, optimized parameter is selected to obtain
The stretchable circuit of best performance.
5. the method according to claim 4 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
Be: in S4 at 70 DEG C, the electric property of metal composite structure obtained is the most stable, and conductivity keeps one under stretching condition
It causes.
6. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
Be: in S1 reproducibility liquid prepolymer oiliness substrate preparation the following steps are included:
Elastomeric prepolymer is chosen, the reducing agent that the functional group containing reproducibility is added makes reducing agent in liquid prepolymer oiliness substrate
Mass fraction be 8%-12%, be subject to the viscoelastic fluid flow behavior for not influencing substrate；
The reducing agent of the functional group containing reproducibility is added thereto, obtains mixture, spin coating or extrusion said mixture preparation reduction
Property liquid elastomer prepolymer oiliness substrate.
7. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
It is: uniformly adds the substrate of initiator preparation in S1 for the dimethyl silicone polymer by thermohardening type, need under normal pressure, In
It is carried out precuring 7-8 minutes in 70 DEG C of baking oven, obtains that there is viscoelastic mobility substrate.
8. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
Be: in S1 construct pattern carburetion water termination system the following steps are included:
Prepared conductive precursor ink is injected printer by the surface tension matching for adjusting ink-jet ink and printed substrates
Print cartridge completes patterned oil-water interfaces building in the mobility oil pattern that mutually reduction substrate surface inkjet printing is set.
9. the method according to claim 1 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
Be: elastomeric prepolymer is that initiator preparation is uniformly added by the dimethyl silicone polymer of thermohardening type.
10. the method according to claim 6 for preparing stretchable circuit using oil-water interfaces reaction inkjet printing, feature
Be: the reducing agent in S1 is the compound containing aldehyde radical.
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| CN103219243A (en) * | 2012-09-28 | 2013-07-24 | 复旦大学 | Manufacturing method of patterning metal lines |
| CN104977338A (en) * | 2015-05-21 | 2015-10-14 | 天津大学 | Method for processing microelectrode on PDMS substrate based on inkjet printing technology |
| CN109080281A (en) * | 2018-08-10 | 2018-12-25 | 齐鲁工业大学 | The method for preparing flexible transparent conducting film based on the fine inkjet printing of wellability substrate |
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2017
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| WO2004020065A3 (en) * | 2002-08-28 | 2005-04-28 | Mt Technologies Inc | Microfluidic affinity system using polydimethylsiloxane and a surface modification process |
| CN103219243A (en) * | 2012-09-28 | 2013-07-24 | 复旦大学 | Manufacturing method of patterning metal lines |
| CN103219243B (en) * | 2012-09-28 | 2016-12-21 | 复旦大学 | The preparation method of pattern metal circuit |
| CN104977338A (en) * | 2015-05-21 | 2015-10-14 | 天津大学 | Method for processing microelectrode on PDMS substrate based on inkjet printing technology |
| CN109080281A (en) * | 2018-08-10 | 2018-12-25 | 齐鲁工业大学 | The method for preparing flexible transparent conducting film based on the fine inkjet printing of wellability substrate |
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Effective date of registration: 20221222 Address after: Room 3115, No. 135, Ward Avenue, Ping'an Street, Changqing District, Jinan, Shandong 250300 Patentee after: Shandong Jiqing Technology Service Co.,Ltd. Address before: 250353 No. 3501, Daxue Road, Jinan City, Shandong Province Patentee before: Qilu University of Technology |