WO2019119928A1

WO2019119928A1 - Inkjet printing device capable of controlling transport liquid to print patterned surface and printing method

Info

Publication number: WO2019119928A1
Application number: PCT/CN2018/109054
Authority: WO
Inventors: 刘欢; 孟利利; 江雷
Original assignee: 北京赛特超润界面科技有限公司
Priority date: 2017-12-20
Filing date: 2018-09-30
Publication date: 2019-06-27
Also published as: CN109940986B; CN109940986A

Abstract

An inkjet printing device capable of controlling a transport liquid to print a patterned surface, comprising an ink cartridge circuit board (1) containing m rows of ink discharge hole clusters, and m rows of corresponding brush holders (2) fixed to a lower portion of the ink cartridge circuit board. Each row of ink discharge hole clusters contains n ink-discharge holes (5). Correspondingly, each row of brush holders contains n sets of fixing holes (3). A plurality of conical fibers (hairpins) (4) is inserted and fixed inside each fixing hole. The conical fibers have a micro or nano structure on a surface thereof, and form a set of conical fiber array units (brush hairs), such that the bottom of each ink discharge hole corresponds to a set of brush hairs, and a vertical projection of the ink discharge hole corresponds to the tip position of the brush hair. The tip of the brush hairs point downward and form an angle of 12-18° with a horizontal plane. The conical fiber material used in the application is affordable and accessible, and the inkjet printing technology can dispense ink at an accurate position. The fine structure of the conical fibers allows ink to be transported in a controllable, continuous and uniform manner, thereby resolving issues with uniformity present in many film formation techniques.

Description

Inkjet printing device with controllable transport liquid as patterned surface and printing method

Technical field

The present invention relates to the field of functional materials, and in particular to an ink jet printing apparatus and a printing method in which a controllable transport liquid is a patterned surface.

Background technique

Functional material patterning is a necessary means to realize electronic devices and integrated processing. It is widely used in optical displays, electronic circuits, semiconductor devices and solar cells, such as patterned photonic crystals for sensitivity detection, conductive polymers. The patterning is used for the preparation of optoelectronic devices, especially flexible electronic devices, and the quantum dots are prepared into ink for printing, and light-emitting patterns of different shapes and different colors can be obtained. In view of the importance of functional material patterning in the development of information technology, medical technology, energy technology and other fields, it has become a hot issue in various research fields. However, the various problems in the current patterning process have plagued researchers.

Lithography is a widely used method in the semiconductor industry to form uniform, accurate, high-resolution wiring, but this makes lithography still limited to 1:1 copy mode of templates and products. Waste of resources and reduced efficiency. Screen printing is a widely used technique for quickly, inexpensive, and large-area deposition of dye films, and it is easy to define patterns of deposited substrate regions. However, the patterning accuracy of screen printing is low, generally only reachable. The level of a few microns to a few tens of microns, and screen printing requires higher viscosity and lower volatility for the desired solution, resulting in a higher roughness of the patterned film. The method of directly printing a thin film of material can be used to realize its patterning to protect its performance, but the technique has the uniformity of the pattern, the continuity of the processing, and the difference of the thermal expansion coefficient of different materials in realizing large-area high-precision patterning processing. Problems caused by dimensional deviation and alignment accuracy of multilayer processing. Patterned inkjet printing technology is a patterning rapid preparation technique. It has the advantages of fast printing speed, non-contact, high positioning accuracy, and has received extensive attention in the field of optoelectronic devices in recent years. However, the uniformity and film thickness of the patterned film formed by ink jet printing are problematic. It can be seen that the patterning technology still faces great challenges.

Summary of the invention

In order to solve the above problems, the present invention provides an ink jet printing apparatus and a printing method in which a controllable transport liquid is a patterned surface.

The controllable transport liquid of the present invention is a patterned surface ink jet printing apparatus, comprising: a ink cartridge circuit board 1 containing m discharge ink hole groups and a corresponding m row pen holder 2 fixed to the lower portion of the ink cartridge circuit board; Each of the discharge ink set includes n ink discharge holes 5, correspondingly, each row of pen holders includes n sets of fixing holes 3, and each of the fixed holes is inserted and fixed with a plurality of tapered fibers 4 (hair needles) to form a set of tapered fiber arrays. a unit (pen) corresponding to a set of tapered fiber array units under each ink discharge hole; a vertical projection of the ink discharge holes corresponding to a tip position of the tapered fiber array unit; a tip of the tapered fiber array unit Below, with the level is 12 ~ 18 ° angle.

According to the ink jet printing apparatus of the present invention, preferably, one to four tapered fibers (hair needles) are inserted and fixed in each of the fixing holes to form a set of tapered fiber array units (pens). Further preferably, two tapered fibers are inserted and fixed in each of the fixing holes to form a set of tapered fiber array units. Further, when the tapered fiber array unit is a tapered fiber, the vertical projection center of the ink discharge hole corresponds to the tip position of the tapered fiber; when the tapered fiber array unit is two tapered fibers and above, Each of the tapered fibers is parallel in a row, the vertical projection of the ink discharge hole corresponds to the tip position of the tapered fiber, and the vertical projection center of the ink discharge hole corresponds to the center of the tapered fiber array unit (ie, the most The center position between the outer two needles) ensures that the inkjet material can be evenly distributed on the respective tapered fibers in the tapered fiber array unit.

According to the ink jet printing apparatus of the present invention, the tapered fiber is a polymer fiber, an inorganic non-metal fiber, a metal fiber or animal hair. The shape of the tapered fiber is as shown in FIG.

When the tapered fiber is animal hair, it may be wolf hair, stone mane or rabbit hair or the like. The hair of the animal is 1 to 5 cm in length, and the main body of the hair is a conical material having a polysaccharide and a protein structure; the diameter of the cone material varies from 0 to 150 μm to form a gradual tapered structure; The surface of the structure is covered by a "scale" oriented structure of 50-300 nm height, or nanostructure of the same scale.

When the tapered fiber is a polymer fiber, an inorganic non-metal fiber or a metal fiber, it may be a polyethylene fiber, a polyvinyl alcohol fiber, a glass fiber, a copper wire, a silver wire, a carbon fiber or the like. The diameter of the material varies from 0 to 500 microns. The material is cut to a required length of usually 1 to 5 cm, and then the fiber is fixed on a three-dimensional table for chemical etching to form a tapered tapered structure. The tapered structure The surface has a certain roughness.

An ink jet type printing apparatus according to the present invention, wherein the root of the tapered fiber array unit faces a forward moving direction of the ink cartridge circuit board.

According to the ink jet printing apparatus of the present invention, preferably, the even rows of the pen holders are offset from the odd rows of the pen holders by a set of tapered fiber array units.

The pen holder of the present invention may be any material that can be used in the art, such as titanium alloys and the like. The pen holder of the present invention may be fixed under the ink cartridge circuit board in any known manner, for example, by screwing or bonding the pen holder fixing portion to both sides of the ink cartridge.

The present invention also provides a printing method based on the above ink jet printing apparatus, the method specifically comprising the following steps:

1) loading the functional molecule solution into the ink cartridge, and dropping the solution droplets onto the tapered fiber array unit through the ink outlet holes on the ink cartridge circuit board to obtain a printing tool;

2) Connect the printing tool obtained in step 1) to the three-dimensional mobile station, and place the ink cartridge circuit board horizontally above the substrate, move down to make the tip of the tapered fiber array unit contact the substrate, and then press down 0~3mm to 0~ The speed was moved at 5000 μm/s to produce a patterned surface.

The printing method according to the present invention, wherein the substrate is a glass sheet, a silicon wafer, a polymer substrate (polymer such as PET), paper, or the like.

The functional liquid (ink) mentioned in the present invention includes a polymer solution, a small molecule solution, an inorganic nanoparticle solution, a quantum dot solution, a nanowire solution (silver nanowire, an alumina nanowire, a zinc oxide nanowire, a microbial solution). , copper nanowires, etc.).

The ink jet printing device of the invention can be used for patterning of photonic crystals, and is applied to the fields of intelligent display, optical waveguide, optical fiber, mirror, super prism, photocatalytic solar cell and sensing detection; Patterning, widely used in optoelectronic devices, especially in flexible optoelectronic devices; printing of inorganic nanoparticle inks, quantum dot inks, carbon nanotube inks, graphene inks and carbon black inks, can be applied to green plate making, optics Display, electronic circuits, semiconductor devices and solar cells; for the patterning of metal inks, can be used for large-area preparation of electronic circuits, data storage and other microelectronic devices.

The invention combines the inkjet printing technology and the direct printing method of the writing brush. The inkjet printing technology can accurately spray the ink on the writing brush to accurately and continuously supply the ink, and the ink is further patterned by the brush, and the surface unique to the writing brush has micro-nano. The structured tapered fiber structure enables controlled and uniform transfer of ink onto the substrate. This method combines the advantages of both technologies while also addressing issues such as uniformity and thickness of the film in ink jet printing technology.

Most of the patterning technologies have problems such as technical cost, precision, and film formation. The prior art cannot solve these problems at the same time. The method proposed by the present invention simultaneously solves these problems to be solved, and the adopted The tapered fiber material is cheap and easy to obtain, and the inkjet printing technology can print the ink at a precise position. The microstructure of the tapered fiber can be controlled and continuously and uniformly transmitted by the ink, solving the problem of uniformity of film formation in many technologies.

DRAWINGS

Figure 1 is a front view of the ink jet printing apparatus of the present invention (taking two needles as an example, including an ink cartridge);

Figure 2 is a side view of the ink jet printing apparatus of the present invention (taking two needles as an example, including an ink cartridge);

Figure 3 is a front elevational view of the carriage of the ink jet printing apparatus of the present invention;

Figure 4 is a side view of the pen holder of the ink jet printing apparatus of the present invention;

Figure 5 is a schematic view of a polymer hair needle of the ink jet printing apparatus of the present invention;

Figure 6 is a schematic view showing the printing of the ink jet printing apparatus of the present invention.

Reference numeral

1. Ink cartridge circuit board 2. Pen holder 3. Fixing hole 4. Conical fiber

5, ink outlet 6, storage cartridge

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the embodiments.

As shown in FIG. 1-2, the inkjet printing device of the present invention for controlling a transport liquid is a patterned surface, wherein the ink cartridge circuit board 1 including the m discharge ink hole group and the lower portion of the ink cartridge circuit board are fixed. Corresponding m row pen holder 2; each ink ejection group contains n ink discharging holes 5, correspondingly, each row of pen holders includes n sets of fixing holes 3, and each of the fixing holes is inserted and fixed with a plurality of tapered fibers 4 (hair needles) Forming a set of tapered fiber array units (pens), each of which corresponds to a set of tapered fiber array units; a vertical projection of the ink discharge holes corresponding to a tip position of the tapered fiber array unit; The tip of the fiber array unit faces downwards at an angle of 12 to 18 degrees from the horizontal.

The pen root portion faces a forward moving direction of the ink cartridge circuit board. Preferably, the even rows of the pen holders and the odd rows of the pen holders are in a wrong set of pens.

As shown in FIG. 3-4, the pen holder structure is preferably a titanium alloy pen holder, and the pen holder fixing portion is fixed to both sides of the ink cartridge 6 by screwing or bonding.

As shown in FIG. 6, when the patterned film is printed by using the inkjet printing device of the present application, first, the functional molecule solution is loaded into the ink cartridge, and the solution droplets are dropped on the pen through the ink outlet hole of the ink cartridge circuit board. On the wool, the printing tool is prepared; then, the printing tool obtained in the step 1) is connected to the three-dimensional mobile station, so that the ink cartridge circuit board is horizontally placed above the substrate, and the downward movement causes the pen head to contact the substrate, and then is pressed down to The speed was shifted from 0 to 5000 μm/s to obtain a patterned surface.

Example 1

(1) Take a 1cm-length anisotropic micro-conical fiber, which is sonicated with acetone, alcohol and water for 5 minutes, cleaned and dried at room temperature; cone-shaped fiber is selected from animal newborn hair with "scaled" structure surface. (wolf fiber);

(2) The selected ink tank has several different ink storage areas, and each ink storage area corresponds to several different ink discharge holes, and the ink discharge hole spacing can be between 0 and 1 cm according to different pattern requirements. Make adjustments.

(3) The two pieces of the wolf fiber obtained in the step (1) are closely arranged to form a pen hair, and the thick end of the tapered fiber is bonded to the ink discharge hole of the ink cartridge (as shown in FIG. 2), and the ink cartridge is connected with the ink cartridge. The printing tool is prepared at a certain inclination angle (preferably 15 degrees) of the ink discharge plane. The ink discharge hole of one ink cartridge corresponds to a set of pen hair, the ink cartridge can be controlled by a computer program, and the ink can be replaced at any time according to need, and sealed after replacement;

(4) Adding 5% dimethyl sulfoxide to a PEDOT:PSS aqueous solution (containing 0.8% of PEDOT and 0.5% of PSS) to enhance its conductivity, and then mixing the liquid material Inject the ink cartridge;

(5) Linking the printing tool obtained in the step (3) to the three-dimensional mobile station so as to be close to the substrate at an angle of 15° to the plane, and pressing the substrate to be pressed down by 0 to 3 mm, and the pattern to be brushed is input into the computer program in the computer program. Under control, the film was quickly moved at a speed of 100 μm/s to produce a patterned film.

Example 2

(1) Take 3cm length of anisotropic micro-conical fiber, use acetone, alcohol and water for 5 minutes, clean and dry at room temperature; cone-shaped fiber selects polymer-cone fiber with microstructure ( Polyethylene fiber needle)

(2) The selected ink tank has several different ink storage areas, and each ink storage area corresponds to several different ink discharge holes, and the ink discharge hole spacing can be between 0 and 1 cm according to different pattern requirements. Make adjustments;

(3) Selecting 2 to 4 of the tapered polyethylene fibers obtained in the step (1), and bonding the thick ends of the tapered fibers to the ink discharge holes of the ink cartridge, and forming a plane with the ink discharge holes of the ink cartridge. A printing tool is prepared at a certain angle of inclination (preferably 12 degrees). Making an ink outlet corresponding to a set of needles, the ink cartridge can be controlled by a computer program, and the ink can be replaced at any time as needed, and sealed after replacement;

(4) The red, green and blue quantum dot solutions with the concentration of 2 mg/mL were respectively loaded into different ink storage areas of the ink cartridge.

(5) linking the printing tool obtained in the step (3) to the three-dimensional mobile station to be close to the substrate at an angle of 12° to the plane, pressing the substrate to be pressed down 0 to 2 mm, and inputting the pattern to be input into the computer program in the computer program. Under control, the film is quickly moved at a speed of 300 μm/s to produce a patterned film;

Example 3

(1) Take a 2cm-length anisotropic micro-conical fiber, which is ultrasonicated for 5 minutes using acetone, alcohol and water, and cleaned at room temperature; the tapered fiber is made of polymer-conical fiber with microstructure ( Glass fiber needle)

(3) Selecting 2 to 4 of the tapered glass fibers obtained in the step (1), and bonding the coarse ends of the fibers to the lower side of the ink outlet of the ink cartridge, and inclined to the plane of the ink discharge port of the ink cartridge. An angle (preferably 18 degrees) produces a printing tool. Making an ink outlet corresponding to a set of needles, the ink cartridge can be controlled by a computer program, and the ink can be replaced at any time as needed, and sealed after replacement;

(4) Injecting a polymethyl methacrylate (PMMA) solution (solvent is acetone) with a mass fraction of 9% into the ink cartridge;

(5) linking the printing tool obtained in the step (3) to the three-dimensional mobile station to be close to the substrate at an angle of 18° to the plane, pressing the substrate to press 0 to 3 mm, and inputting the pattern to be input into the computer program in the computer program. Under control, the film was quickly moved at a speed of 500 μm/s to produce a patterned film.

Example 4

(1) Take 2cm length of anisotropic micro-conical fiber, use acetone, alcohol and water for 5 minutes, clean and dry at room temperature; taper fiber selects metal cone-shaped fiber with microstructure (copper wire);

(3) The tapered copper wire fibers obtained in the step (1) are closely arranged, and the coarse ends of the fibers are bonded to the lower side of the nozzle of the ink cartridge (as shown), and are aligned with the nozzle plane of the ink cartridge. A printing tool is prepared at an oblique angle (preferably 13 degrees). Making an ink outlet corresponding to a set of needles, the ink cartridge can be controlled by a computer program, and the ink can be replaced at any time as needed, and sealed after replacement;

(4) Injecting a polystyrene (PS) solution (solvent is dichloromethane) with a mass fraction of 5% into the ink cartridge;

(5) linking the printing tool obtained in the step (3) to the three-dimensional mobile station so as to be close to the substrate at an angle of 13° to the plane, pressing the substrate and pressing down 0 to 2 mm, and inputting the pattern to be brushed into the computer program in the computer program. Under control, the film was quickly moved at a speed of 2000 μm/s to produce a patterned film.

Example 5

(1) Take 4cm length of anisotropic microstructured conical fiber, respectively, using acetone, alcohol and water for 5 minutes, clean and dry at room temperature; cone-shaped fiber is selected with microstructured polymer cone fiber ( Polyvinyl alcohol fiber needle)

(3) The conical polyvinyl alcohol fibers obtained in the step (1) are closely arranged, and the thick ends of the tapered fibers are bonded to the ink discharge holes of the ink cartridge, and are aligned with the ink discharge hole plane of the ink cartridge. A tilting angle (preferably 16 degrees) is used to prepare a printing tool. Making an ink outlet corresponding to a set of needles, the ink cartridge can be controlled by a computer program, and the ink can be replaced at any time as needed, and sealed after replacement;

(4) adding 0.1% PVA as a stabilizer to the silver nanoparticle solution, and then injecting the mixed solution into the ink cartridge;

(5) linking the printing tool obtained in the step (3) to the three-dimensional mobile station to be close to the substrate at an angle of 16° to the plane, pressing the substrate to be pressed down 0 to 2 mm, and inputting the pattern to be input into the computer program in the computer program. Under control, the film was quickly moved at a speed of 5000 μm/s to produce a patterned film.

The invention may, of course, be embodied in various embodiments and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the invention. Changes and modifications are intended to be included within the scope of the appended claims.

Claims

An ink jet printing device with a controllable transport liquid as a patterned surface, characterized in that the ink jet printing device comprises a ink cartridge circuit board (1) containing m discharge ink hole groups and fixed in the ink cartridge circuit Corresponding m row pen holder (2) in the lower part of the plate; each ink ejection group contains n ink discharging holes (5), correspondingly, each row pen holder contains n sets of fixing holes (3), and each fixing hole is inserted and fixed a plurality of tapered fibers (4) having a micro-nano structure forming a set of tapered fiber array units, corresponding to a set of tapered fiber array units under each ink discharge hole, the vertical projection of the ink discharge holes corresponding to the tapered fiber array The top position of the unit;

The tip of the tapered fiber array unit faces downward, at an angle of 12 to 18 degrees from the horizontal.
The ink jet printing apparatus according to claim 1, wherein one to four tapered fibers are inserted and fixed in each of the fixing holes to form a set of tapered fiber array units.
The ink jet printing apparatus according to claim 2, wherein two tapered fibers are inserted and fixed in each of the fixing holes to form a set of tapered fiber array units.
The ink jet printing apparatus according to any one of claims 1 to 3, wherein the tapered fiber is a polymer fiber, an inorganic non-metal fiber, a metal fiber or animal hair.
The ink jet printing apparatus according to claim 4, wherein said animal hair has a length of 1 to 5 cm, and the main body of the hair is a conical fibrous material having a polysaccharide and a protein structure; and said tapered material The diameter varies from 0 to 150 microns to form a graded tapered structure; the surface of the tapered structure is covered by a "scale" oriented structure of 50 to 300 nanometers in height, or a nanostructure of the same scale.
The ink jet printing apparatus according to claim 4, wherein the tapered fiber is a polymer fiber, an inorganic non-metal fiber or a metal fiber, and the diameter of the tapered fiber material varies from 0 to 500 μm. 1 to 5 cm, the needle is chemically etched into a tapered structure, and the surface of the tapered structure has a rough structure.
The ink jet printing apparatus according to any one of claims 1 to 3, wherein the root of the tapered fiber array unit faces the forward moving direction of the ink cartridge circuit board.
A printing method based on the ink jet printing apparatus according to any one of claims 1 to 7, comprising the steps of:

1) loading the functional molecule solution into the ink cartridge, and dropping the solution droplet onto the tapered fiber array unit through the ink outlet hole on the ink cartridge circuit board to obtain a printing tool;

2) connecting the printing tool obtained in step 1) to the three-dimensional mobile station, placing the ink cartridge circuit board horizontally above the substrate, moving down so that the tip of each set of tapered fiber array unit contacts the substrate, and then pressing down 0 to 3 mm, The patterning surface was prepared by moving at a speed of 0 to 5000 μm/s.
The printing method according to claim 8, wherein the substrate is a glass sheet, a silicon wafer, a polymer substrate or paper.