WO2015143748A1 - 一种多功能电流体喷墨打印系统及方法 - Google Patents
一种多功能电流体喷墨打印系统及方法 Download PDFInfo
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- WO2015143748A1 WO2015143748A1 PCT/CN2014/075804 CN2014075804W WO2015143748A1 WO 2015143748 A1 WO2015143748 A1 WO 2015143748A1 CN 2014075804 W CN2014075804 W CN 2014075804W WO 2015143748 A1 WO2015143748 A1 WO 2015143748A1
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- roll
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/072—Ink jet characterised by jet control by thermal compensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/28—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing downwardly on flat surfaces, e.g. of books, drawings, boxes, envelopes, e.g. flat-bed ink-jet printers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
- H10F77/211—Electrodes for devices having potential barriers for photovoltaic cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present invention relates to an ink jet printing system, and more particularly to an ink jet printing apparatus and method using an electrohydrodynamic body.
- Inkjet printing equipment has the advantages of manufacturing environment friendly, saving printing materials, simple operation, etc. In recent years, it has gradually developed from the field of traditional image printing to the fields of printing electronics, micro-flow channels, etc., such as the manufacture of flexible electronic transistors and biosensors by inkjet printing technology. , solar cells, microfluidic chips, etc.
- Conventional inkjet printing technology mainly uses two modes of continuous and on-demand printing, wherein on-demand printing includes piezoelectric and thermal bubble inkjet.
- on-demand printing includes piezoelectric and thermal bubble inkjet.
- the piezoelectric crystal is usually used to generate ink droplets, and then the charging electrode is used to charge the ink.
- the control unit converts the image information into control information of the droplet deflection distance, by changing the ink passing through.
- the ink droplet deflection distance is changed by paralleling the electrode voltage to form a pattern on the printing medium, but this continuous inkjet printing method causes a serious waste of ink.
- Piezoelectric control is more complicated, structural dimensional accuracy is higher, aging and deformation of piezoelectric crystal and its accessories, performance of the print head is degraded at any time, and the life of the nozzle is short, the working energy is high, and the positioning accuracy of the spray droplets not tall.
- the thermal bubble type has a certain selectivity to functional materials due to instantaneous local heating, and the droplet size is large. It is generally accepted that when printing on demand, the droplet diameter is 1.89 times the diameter of the needle, and the print line width is 20 to 50 microns.
- the manufacturing process presents challenges. Due to the effect of the surface tension, even if a thinner needle is manufactured, the size of the droplet cannot be effectively reduced, and the needle is easily clogged. At the same time, in applications such as printing electronics, the ink is mostly a polymer, a high-quality fraction solution, which has the characteristics of high viscosity and high density, so that the nozzle is easily clogged and rebounds, and droplets cannot be efficiently produced.
- the basic structure of an electronic device is a dot, a line, a thin film, etc., and the formation of an electronic device by stacking of microdroplets has disadvantages: 1) In the case of forming a large-area film and a microstructure array, the efficiency is very low; 2) Uniform structure Poor performance, resulting in rough and uneven structure, resulting in electrical and mechanical properties difficult to meet the requirements, especially the deformation performance requirements of flexible electronics.
- the existing inkjet printing technology has the following disadvantages: (1) low resolution of printing and printing, droplet size is limited by nozzle diameter; (2) not suitable for high viscosity polymer solution, nozzle is easy to block (3) The nozzle manufacturing process is complicated; (4) When printing large-area films and microstructures, the efficiency is low; (5) The printing mode is single, and selective preparation of dots, wires, and films cannot be realized.
- electrohydrodynamic technology As a process and equipment for inkjet printing has emerged, mainly for electrostatic spraying (Electrospray), electrospinning (Electrospinning) and electrohydrosonic printing (Electrohysrodynamic jet printing). Studies have shown that these three current body modes can be used to fabricate three structures: point, line and film.
- the current body power printing method is adopted in the US patent application US 20110187798 Al, but the nozzle size is small (several micrometers to several hundred nanometers), and it is easy to be blocked, and the distance between the nozzle and the substrate is 100 micrometers lower, and the ejection height cannot be avoided.
- U.S. Patent Application No. US2008/0003374 A1 is a schematic description of the method of depositing a film by electrostatic spraying, the needle and the ring electrode away from the needle realize the flow of the ink, but the liquid finally splits into small droplets, lacks substrate motion control, and cannot form a uniform film. pattern.
- Patent Application No. 7,324,043 B2 can only perform the deposition printing of fibers in the horizontal direction, and the nozzle cannot perform in-plane movement, so that it is unable to meet the deposition and production requirements of a continuous large area on the substrate.
- U.S. Patent No. 8,586,148 B2 low pressure near field spinning, and its operation is non-steady, and the droplets will drip over a period of time. [Summary of the Invention]
- the object of the present invention is to provide a multifunctional, high-resolution current body inkjet printing system using electrohydrodynamic technology to realize micro/submicron dot printing, micro/submicron line structure direct writing and nano film. Spraying, and can be used for sheet processing and roll-to-roll processing.
- a multi-functional current body printing apparatus which can form a plurality of inkjet printing modes, thereby realizing the printing manufacturing of different types of equipment, characterized in that the printing apparatus Includes:
- a printing module disposed on the support table, having a nozzle for ejecting ink for ejecting onto a printing substrate for pattern printing;
- the rigid substrate carries a motion module disposed on the support table to fix a hard printed medium substrate for use as a pattern printing substrate, and can be driven to move relative to the printing module to achieve the hard printing Pattern printing on the dielectric substrate;
- a roll-to-roll film substrate transport module disposed on the support table to transport a flexible print medium film as a pattern print substrate, the flexible print medium film being moved on the flexible print medium film by moving relative to the print module Print on the pattern;
- a direct write of a single drop, a spray of atomized droplets, or a single continuous jet is produced.
- a variety of different printing methods, combined with different substrates, can be printed on a variety of devices and / or a variety of patterns.
- the printing module comprises: a base fixedly disposed on the support table; a first direction motion module disposed on the base relative to the first direction; the first direction motion module connection board disposed on the motion slide of the first direction motion module is mounted on the base a second motion direction module on the first direction motion module, which is movable in the second direction relative to the first direction motion module; and a second on the motion slide table disposed on the second direction motion module
- the directional motion module connecting plate is mounted on the second direction movement module, and the third movement direction module is movable relative to the second direction movement module in the third direction, and the injection pump is mounted thereon and connected thereto For inkjet nozzles.
- the rigid substrate carrying motion module includes: a base fixed on the support table; a first direction motion module disposed on the base to be movable relative to the first direction a second direction motion module mounted on the first direction motion module by a motion connecting plate fixedly disposed on the first direction motion module, wherein the motion module is movable in the second direction relative to the first direction; An adsorption platform is mounted on the second direction movement module by the slider connecting plate fixedly disposed on the second direction movement module, and can be moved in the same direction, and the adsorption platform is used for adsorption fixing as a pattern printing substrate. Hard print media substrate.
- the roll-to-roll film substrate conveying module includes a front end discharge portion and a rear end receiving portion, wherein the front end discharge portion includes a discharge bottom plate, a discharge roller disposed on the discharge bottom plate, and a pair of rollers, the film substrate is discharged through a discharge roller and passed between the two rollers of the pair of rollers; and the rear end receiving portion includes a receiving bottom plate, an adsorption roller disposed on the receiving bottom plate, and a floating roller And a take-up roll, the film substrate conveyed from the front end discharge film is suction-adhered by the adsorption roller, and further conveyed to the take-up roll for receiving, the floating roll is disposed between the two to be tensioned The film substrate.
- the discharge roller comprises a magnetic powder brake connecting plate, a magnetic powder brake, a coupling, a bearing bearing, an inflation shaft, a coil, wherein the magnetic powder brake connecting plate is used for fixing a magnetic powder brake,
- the vertical fixed connection is made on the discharge bottom plate, and the magnetic powder brake connection plate is fixedly mounted on the side.
- Place The other end of the magnetic powder brake is inserted into the connecting hole of the coupling, and the optical axis of the inflatable shaft passes through the bearing hole in the bearing bearing fixed on the discharging bottom plate, and is connected to the other end of the coupling.
- the roll is wrapped around the expanded end of the inflatable shaft and held in tension to provide a film substrate material.
- the pair of rollers includes upper and lower rollers disposed in parallel opposite sides, the two ends of which are supported by two pairs of symmetric support plates fixed vertically on the discharge floor, wherein the pair of rollers support
- the upper end of the plate is provided with a notch for mounting the cylinder, and the upper roller is connected with the cylinder piston, through which the gap between the upper and lower rollers is adjusted, and one end of the lower roller is connected with the rotating shaft of the motor, and the lower roller is rotated by the motor.
- the take-up roll comprises a take-up roll motor supported by a take-up roll motor support disposed on the receiving bottom plate, the motor shaft of the take-up roll motor being coupled to one end of the clutch, an inflation shaft
- the optical axis passes through a bearing hole in the bearing bearing fixed on the receiving bottom plate, and is connected in the other end hole of the coupling, and the receiving roller is set on the inflation shaft, and receives The drive of the roller motor drives the film to receive the material.
- the receiving roller further includes a magnetic powder clutch supporting plate fixedly disposed on the receiving bottom plate, which is used for installing and installing a magnetic powder clutch for ensuring a certain damping during receiving, and receiving The roll tension is constant to ensure that the roll is tight. Also included is a coupling through which the motor shaft of the take-up reel motor is disconnectably coupled to the magnetic powder clutch, and the other end of the magnetic powder clutch is coupled to one end of the clutch.
- the floating roller comprises a floating roller mounting plate connected to the receiving bottom plate by a corner support and perpendicular to the bottom plate of the receiving roller, further comprising an idler roller and a friction cylinder for driving the movement thereof,
- the idler roller is coupled to the float roller mounting plate by an adapter plate, wherein the idler roller includes a flange coupled to the adapter plate
- the support, the idler roller shaft disposed on the flange support, the idler roller set on the idler roller shaft, and the bearing sleeves at both ends are sleeved and sealed by the bearing cap.
- the adsorption roller includes an adsorption roller shaft, a sleeve fitted outside the adsorption roller shaft, and a suction roller motor connected to one end of the adsorption roller shaft, wherein the adsorption roller shaft is a stepped spindle.
- a shaft groove is formed in the axial direction of the outer circumference of the shaft, and a baffle is disposed in the key groove and disposed between the adsorption roller and the sleeve, and the adsorption roller is fixed to the other end of the adsorption roller motor through the shaft support
- both ends are closed by the adsorption roller end cover, thereby forming a sealed space, and by forming the sealed space to a certain degree of vacuum, the film substrate is adsorbed on the surface of the sleeve through the small hole in the sleeve, and the adsorption is utilized.
- the roller motor drives the rotation of the sleeve to achieve film adsorption and feeding.
- the printing apparatus further includes a jet vision observation module having an observation portion and an illumination portion disposed at the other end of the inkjet module, wherein the observation portion includes an adjustment slide, a connection plate , height adjustment slide table, camera, lens, wherein the adjustment slide is fixedly arranged on the support table, the bottom of the connection plate is connected with the adjustment slide table, and the side is connected with the height adjustment slide table, and the camera is fixed on the top of the height adjustment slide table,
- the lens is connected to the camera by using a thread;
- the illumination part comprises a light source, a light source fixture, an adapter plate, a height adjustment slide table, a support plate, a single-axis horizontal slide table and a support plate, wherein the single-axis horizontal slide table is fixed at On the support plate, the support plate is L-shaped, wherein the bottom plate is connected to the horizontal sliding table, the side surface is connected with the height adjusting sliding table, the height adjusting sliding table slider is connected with the adapter plate, and the other end of the adapt
- the printing apparatus further has a casing disposed on the support table and covering the printing module, the rigid substrate carrying motion module and the roll-to-roll film substrate conveying module, and the casing further has a lower end The temperature control box body, the upper end temperature control box body, the refrigerator and the heater, wherein the lower end temperature control box body is fixed on the support table for isolating the heat emitted by the rigid substrate motion module,
- the upper temperature control box is vertically mounted on the lower temperature control box, and has a partition separating the two to form a temperature control cavity for the printing area, and the refrigerator and the heater are respectively installed at The upper end temperature controls the top and side walls of the box body for real-time control of the temperature inside the box.
- the nozzles in the printing module are two layers of upper and lower layers, the upper layer is a PDMS layer, and the lower layer is a silicon-based array nozzle layer, and the two are connected by a bond, wherein the PDMS layer functions.
- the function of the silicon-based array nozzle layer is to integrate a plurality of tiny nozzles, and each nozzle is provided with an external voltage
- the gold electrode of the control circuit acts as a control interface.
- the small hole etched in the silicon wafer serves as an output port of the solution, and when there is a high voltage electrostatic field between the nozzle layer and the bottom receiving plate, the Taylor cone formed at the nozzle can generate a jet.
- the first direction, the second direction, and the third direction are perpendicular to each other.
- a printing apparatus as described above for performing ink jet printing of a MEMS, a biosensor, a piezoelectric film, a solar thin film battery or a bendable tensile corrugated structure.
- the present invention by controlling the distance between the tip and the substrate, the viscosity of the liquid and the magnitude of the applied voltage, different shapes of the jet are realized, thereby generating a single droplet, an atomized droplet and a single continuous jet, which are realized in three sprays.
- the fast switching of the ink printing method solves the problem of implementing different types of device structures with the same device.
- the film substrate roll-to-roll and hard substrate vacuum adsorption printing module is constructed in the same system, which satisfies the requirements of the device for different substrates.
- the two sets of visual observation modules the formation of the pattern and the flight of the space droplets can be observed in real time.
- the vision system for observing the substrate pattern is in direct view mode, and the lens direction is consistent with the nozzle. After the printing pattern is completed, the print appearance is directly observed.
- the visual system for observing the flight of a droplet in a space is back-lit, with the lens in the horizontal direction and the focal plane at the nozzle.
- the printing module comprises a moving platform and a nozzle for controlling the movement of the nozzle, and specifically controls three printing modes, and has a vision system for observing the pattern on the substrate; a rigid substrate carries a motion module for carrying and fixing the hard The medium substrate is printed to move relative to the nozzle; the thin-to-roll thin transport module is used to adsorb the flexible substrate to ensure that it is flat and has no slip during motion; and a jet visual inspection module for detecting the flight path of the droplet space, It can also be used for real-time observation of multi-layer overprint and substrate patterns for optical detection of printed structures.
- a temperature and humidity control module is used to control the temperature and humidity in the printing chamber to ensure the stability of printing.
- the key technology used is the printing method and the motion coordination planning of the motion platform in each module.
- the motion module of the printing system comprises at least three orthogonal moving units
- the rigid substrate carrying motion module comprises at least two horizontally oriented moving units
- the roll-to-roll film transport module comprises a horizontal movement.
- the working mode is as follows:
- the first type is pattern printing on a sheet substrate (hard substrate or flexible substrate), such as silicon wafer, conductive glass, steel sheet, PET polymer substrate, etc., wherein a sheet-bearing motion module is used.
- the moving unit drives the substrate out of the pattern track.
- the nozzle is selected to be fixed after printing, the deposition of dots, fibers and films can be printed.
- the second type is a flexible film, such as polyester film (PET), polyacyl.
- the imine film (PI), etc. adopts a roll-to-roll thin conveying module to drive the film to the printing position, and the nozzle is kept fixed after the printing mode is selected, and the 2 orthogonal horizontal moving unit of the printing module is responsible for walking out of the pattern track, then Dots, fibers and films are printed on the flexible film.
- the key technology used is to select the appropriate printing method and the motion of the motion platform according to the specific application object.
- Specific applications such as for full-print RFID, use the first and second types of substrate motion to combine a single continuous jet to create an antenna, and then use on-demand injection to create resistors and inductors; for biosensors, the first type of motion is combined with a single The continuous jet is used to manufacture the electrode, and the functional active layer film is fabricated by combining the atomized droplets and the second type of substrate movement; for the light emitting diode, the first type and the second type of substrate movement are combined with the atomized droplets to produce a sheet or continuous Different functional films; For solar cells, the first and second types of substrate motion are combined with a single continuous jet to fabricate the back electrode on a single substrate and a continuous substrate.
- the printing environment In order to achieve accurate positioning of nanofibers and droplets, as well as print structure consistency, the printing environment must be stable. In order to further improve the applicability of the equipment and reduce the requirements on the working environment, the micro-environment control unit sealed by the outer casing is used to control the temperature and humidity in the printing chamber. In order to avoid the defects introduced by the traditional air-cooling and cooling, the micro-environment control unit uses a semiconductor heating sheet and a cooling sheet to control the temperature of the space by conduction and radiation.
- the outer casing is made of heat-insulating material to ensure that the loss between temperature and environment is reduced, while the semiconductor heating plate and the cooling plate are made of metal, which has good thermal conductivity and can quickly change its temperature.
- the key technology used is to replace a single nozzle with an array of nozzles for array printing in a single drop and single continuous jet printing mode. Specifically, through the analysis of the pattern, the printing state of a single nozzle can be individually controlled, and the activation and shutdown of each nozzle can be realized, and high-efficiency printing can be performed.
- the printing module comprises at least three moving units in orthogonal directions
- the rigid substrate carrying motion module comprises at least two horizontally moving units
- the roll-to-roll film transport module comprises 1 horizontal movement
- the substrate is vacuum-adsorbed on the carrying platform, and the structure is divided into upper and lower layers, the upper layer is a PDMS layer, and the lower layer is a silicon-based array nozzle layer, and the two are connected by bonding.
- the function of the silicon-based array nozzle layer is to integrate a plurality of tiny nozzles, and each nozzle is provided with a gold electrode connected to an external voltage control circuit as a control interface.
- the small hole etched in the silicon wafer serves as an output port of the solution, and when there is a high voltage electrostatic field between the nozzle layer and the bottom receiving plate, the Taylor cone formed at the nozzle can generate a jet.
- the nozzle may be an arrayed electrohydrodynamic print head.
- the specific process of the pattern printing is: print pattern input; pattern format analysis, nozzle unit preheating (loading voltage, ink supply); start printing pattern; pattern detection and motion parameter control on line; End.
- a plurality of small holes are formed in the sleeve of the adsorption roller, so as to facilitate the adsorption of the film on the surface of the sleeve with a vacuum pump to form a closed region.
- the present invention there is an insulating plate between the adsorption platform and the slider, and the insulating plate functions to isolate electrical interference.
- the present invention has the following outstanding advantages: (1) Integrated processing capability with multiple printing modes, which can print various types of devices; (2) Different types of inkjet printing methods can be selected to select different types of substrate materials; (3) Current body power is used Compared with the traditional printing method, the printing mechanism has high printing precision and is less affected by the nozzle diameter.
- the driving force is electrostatic pulling force, the jet drag force is large, and it is suitable for high viscosity solution;
- Process simplification The nozzle structure is simple; (6) Due to the use of the visual observation device, the flight of the droplet can be observed in real time, and the printing performance is improved; (7) Various patterns can be continuously deposited on a flexible and rigid substrate in a large area.
- 1 is an effect diagram of three different printing states of a single droplet, an atomized droplet, and a single continuous jet according to an embodiment of the present invention
- FIG. 2 is a schematic view showing the overall structure of a printing apparatus according to an embodiment of the present invention.
- FIG. 3 is a schematic diagram of the appearance of a printing apparatus according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of an observation component of an ejection visual inspection module in a printing apparatus according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of an illumination component of an ejection visual observation module in a printing apparatus according to an embodiment of the present invention
- FIG. 6 is a printing apparatus according to an embodiment of the present invention.
- FIG. 7 is a plan view of a roll-to-roll conveying flexible film module in a printing apparatus according to an embodiment of the present invention
- FIG. 8 is a roll-to-roll conveying flexible film in a printing apparatus according to an embodiment of the present invention; Schematic diagram of the module discharge roller;
- Figure 9 is a view showing the structure of a roll-to-roll conveying flexible film module to a roll in a printing apparatus according to an embodiment of the present invention.
- 10 is a schematic structural view of a take-up roller of a receiving end portion of a roll-to-roll flexible film module in a printing apparatus according to an embodiment of the present invention
- 11 is a schematic structural view showing a roll-to-roll conveying flexible film module as a floating roller in a printing apparatus according to an embodiment of the present invention
- Figure 12 is a schematic view showing the explosion of the roll-to-roll conveying flexible film module as an adsorption roller in the printing apparatus of the embodiment of the present invention
- FIG. 13 is a schematic structural view of a printing module in a printing apparatus according to an embodiment of the present invention.
- Figure 14 is a side elevational view of a printing module in a printing apparatus according to an embodiment of the present invention.
- FIG. 15 is a schematic structural view of a rigid substrate carrying motion module in a printing apparatus according to an embodiment of the present invention
- FIG. 16 is a schematic structural view of a housing in a printing apparatus according to an embodiment of the present invention.
- 17 is a specific flow of pattern printing according to an embodiment of the present invention.
- Figure 18 is a view showing the movement of each part when performing a mode printing in the printing apparatus of the embodiment of the present invention.
- Figure 19 is a view showing the movement of each part when the printing apparatus of the embodiment of the present invention performs another mode printing
- FIG. 20 is a typical pattern printed by the printing apparatus in the three printing modes of the embodiment of the present invention
- FIG. 21 is a schematic view of the array nozzle of the printing apparatus according to the embodiment of the present invention
- Figure 22 is a buckling corrugated structure pattern printed directly by the printing apparatus of the embodiment of the present invention
- Figure 23 is a linearly strained buckling corrugated structure pattern of the printing apparatus of the embodiment of the present invention
- Figure 24 is a multi-printing apparatus of the embodiment of the present invention Schematic diagram of a functional sensor.
- the printing system can be applied to a conventional printed circuit board, flexible electronic device, and can be applied to micro/nano devices such as biochips, sensors, MEMS devices, and the like.
- FIG. 1 it is a single continuous jet produced by the process of the present invention, that is, by controlling the distance between the nozzle and the substrate, the viscosity of the liquid, and the magnitude of the applied voltage to achieve different shapes of the jet ( a), the printing state of a single droplet (b), and an atomized droplet (c).
- control unit 100 As shown in Figures 2 and 3, the overall structure and appearance of the ink jet printing system of the present invention are shown. It comprises a control unit (control cabinet) 100, a marble support table 200, a jet vision detection module 300, a roll-to-roll film substrate transport module 400, a print module 500, a rigid substrate carrying motion module 600, and a printer housing 700.
- the jet vision viewing module 300 of the present invention includes both an observation portion and an illumination portion.
- Fig. 4 is an observation portion
- Fig. 5 is an illumination portion
- the observation section includes an adjustment slide 311, a connecting plate 312, a height adjusting slide 313, a camera 315, and a lens 316.
- the adjustment slide table 311 is directly connected to the marble support table 200 by screws.
- the bottom of the connection plate 312 is screwed to the adjustment slide table 311, and the side surface is connected with the height adjustment slide table 313 by screws.
- the camera 315 is fixed on the top of the height adjustment slide table 313.
- the lens 316 is threadedly coupled to the camera 315.
- the illumination portion includes a light source 321, a light source clamp 322, an adapter plate 323, a height adjustment slide 324, a support plate 325, a single-axis horizontal slide 326, and a support plate 327.
- the single-axis horizontal slide table 326 is fixed on the support plate 327 by screws.
- the support plate 325 is L-shaped, the bottom plate is screwed on the horizontal slide table 326, the side surface is connected with the height adjustment slide table 324, and the height adjustment slide table 324 is Adapter plate 323 connection, transfer The other end of the board 323 is connected to the light source holder 322, and the light source 321 is connected to the light source holder 322 by screws.
- the light source is turned on and light is directed into the lens 316 along a straight line and captured by the camera 315. If the nozzle is on the light path illuminated by the light, the flight path of the jet in space can be clearly observed to monitor the printing status in real time.
- the roll-to-roll film substrate conveying module 400 includes a front end discharge portion (a discharge bottom plate 410, a discharge roller 420 and a counter roller 430) and a rear end receiving portion (a receiving bottom plate 440, an adsorption roller).
- a front end discharge portion a discharge bottom plate 410, a discharge roller 420 and a counter roller 430
- a rear end receiving portion a receiving bottom plate 440, an adsorption roller.
- 450, floating roller 460, receiving roller 470 the function and structure of each part are as follows:
- the discharge roller 420 includes a magnetic powder brake connecting plate 421, a magnetic powder brake 422, a coupling 423, a bearing support 424, an inflation shaft 425, and a coil 426.
- the magnetic powder brake connecting plate 421 is for fixing the magnetic powder brake, which is a vertical plate, the bottom surface is connected to the discharge bottom plate 410 by screws, and the side surface is connected to the magnetic powder brake 422 through a flange having a screw hole.
- the other end of the magnetic powder brake 422 is inserted into the connecting hole of the coupling 423 and clamped by a screw.
- the optical axis of the inflation shaft 425 passes through the bearing hole in the bearing bearing 424, and is connected to the other end of the coupling 423.
- the bottom of the bearing bearing 424 is connected to the discharge bottom plate 410 to support the inflation shaft 425. Ensure flexible rotation of the inflation shaft.
- the coupling 423 has a bearing bearing 424 bearing hole, and the inflation shaft 425 remains coaxial.
- the coil 426 is wrapped around the expanded end of the inflation shaft 425 to maintain tension.
- the counter roller 430 includes two opposite roller support plates 431, an upper roller link 432, two cylinders 433, an upper roller 434, a coupling 435, a motor 436, a motor support plate 437, and a lower roller 438.
- the connection relationship is as follows.
- the roller support plate 431 is mirror-mounted on the discharge floor 410 in parallel, and the pitch is determined by the length of the upper roller 434.
- the upper end of the roller support plate 431 is notched, the top end of the notch is mounted with a cylinder 433, the cylinder block is fixed at the upper end of the support plate 431, the cylinder piston is connected to the upper roller connecting member 432, and the upper roller connecting member 432 has a bearing hole for mounting.
- the upper roller 434 is a stepped shaft, and the two ends are respectively inserted Into the bearing hole.
- the lower roller 438 is mounted vertically parallel to the upper roller 434 and ensures that the cylinder piston remains tangent when it is fully extended.
- the lower roller 438 is also a stepped shaft, one end is fixed in the bearing hole of the pair of roller support plates 431, and the other end is passed through the bearing hole of the other pair of roller support plates, and the shaft end is connected to the coupling and locked by screws.
- the other end of the coupling 435 is coupled to the rotating shaft of the motor 436.
- the motor 436 is mounted on the motor supporting plate 437, and the motor supporting plate 437 is fixed to the discharge bottom plate 410 by screws, and is held in parallel with the roller supporting plate 431. When the motor is in operation, the rotating shaft will rotate, which will then drive the lower roller 438 to rotate.
- the take-up roller 470 of the rear end receiving portion includes a take-up roller motor 471, a take-up roller motor support member 472, a coupling 473, a magnetic powder clutch 474, a magnetic powder clutch support plate 475, and a coupling 476.
- the take-up roller motor support 472 is used to fix the motor, and the bottom surface and the receiving bottom plate 440 are connected by screws, and the motor shaft is inserted into the round hole of the coupling 473 and clamped by screws.
- the other end of the coupling 473 is inserted into the optical axis of the magnetic powder clutch 474 and tightened.
- the magnetic powder clutch 474 is supported by the magnetic powder clutch supporting plate 475 on the receiving bottom plate 440.
- the magnetic powder clutch supporting plate 475 has a circular hole in the middle, and the other end of the clutch 473 is connected to the end hole of the other coupling 476.
- the optical axis of the inflation shaft 425 passes through the bearing bore in the bearing support 424 and is connected to the other end bore of the coupling 476.
- the bottom of the bearing support 424 is connected to the receiving bottom plate 440 to support the inflation shaft. 425, while ensuring flexible rotation of the inflation shaft 425.
- the coupling 423 has a bearing support 424 and the inflation shaft 425 remains coaxial.
- the specific structure of the floating roller includes a floating roller fixed angle branch 461, a floating roller mounting plate 462, a rail slider 463, a baffle 464, a collision preventing block 465, an adapter plate 466, and an idle roller 467.
- the idler roller 467 includes a flange support 4671, an idle roller shaft 4672, a bearing pipe 4674, and a bearing cover 4675.
- the float roll mounting plate 462 is coupled to the receiving floor 440 by angle brackets 461 and ensures that the float roll mounting plate 462 is perpendicular to the take-up roll floor 440.
- the flange of the low friction cylinder 469 is fixed by screws Attached to the take-up roll bottom plate 440.
- the adsorption roller 450 includes an adsorption roller motor 451, a suction roller motor support plate 452, a coupling 453, a suction roller motor connection plate 454, a suction roller end cover 455, an adsorption roller shaft 456, a shutter 457, a spring 458, and a bearing 459. , sleeve 4510, support plate 4511, shaft support 4512, pneumatic adapter 4513.
- the suction roller support plate 4511 is fixed to the take-up roller bottom plate 440 by screws.
- the adsorption roller shaft 456 is a stepped mandrel and can be divided into a shaft segment I, a shaft segment II, and a shaft segment III, as shown in the drawing.
- the shaft section II of the adsorption roller shaft 456 has two key grooves distributed in a relationship of 60 to 70°.
- the hole of the end face of the shaft section I of the adsorption roller shaft 456 is in communication with the hole of the surface of the shaft section II.
- the front end of the shaft section I of the suction roller shaft 456 is fixed to the support plate 4511 via the shaft support 4512.
- the gas path adapter 4513 is attached to the end face of the shaft section I of the suction roller shaft 456 by a pipe thread.
- the two baffles 457 are respectively mounted in the key grooves on the shaft section I of the suction roller shaft 456, and the length of the baffle 457 should be the same as the length of the shaft 456I.
- Spring 458 is mounted to the bottom of baffle 457 in contact with the shaft and acts to cause baffle 457 to move outwardly along the axis radius.
- Two adsorption roller end caps 455 are respectively mounted on the shaft section I and the shaft section III of the adsorption roller shaft 456 through bearings 459, and are in contact with both ends of the shaft section ⁇ and the baffle 457, and the adsorption roller end cover 455 can overcome the block The friction between the plates 457 is rotated about the axis.
- the sleeve 4510 is sealingly and fixedly connected to the two adsorption roller end caps 455, respectively, and ensures that the axis of the sleeve 4510 coincides with the axis of the adsorption roller end cover 455, and the inner wall of the sleeve 4510 is in contact with the top surface of the baffle 457.
- the suction roller end cap 455 mounted on the shaft segment III is fixed to the suction roller motor connector 454 by screws, and the other end is coupled to the motor 451 via a coupling 453.
- the adsorption roller motor 451 is fixed to the take-up roller bottom plate 440 by the adsorption roller motor support plate 452.
- the adsorption roller end cap 455, the adsorption roller shaft 456, the baffle 457, and the sleeve 4510 form a closed region.
- the sealed area is brought to a certain degree of vacuum by a vacuum pump.
- the film is adsorbed on the surface of the sleeve 4510 through a small hole in the sleeve 4510, and the sleeve is rotated by the motor to realize film feeding.
- 13 and 14 are jet printing modules, which may be, for example, a Cartesian coordinate three-axis robot, which specifically includes a base 501, an X-direction motion module 502, an X-direction motion module connection plate 503, and a Y-direction motion module 504, Y.
- the base 501 is directly connected to the marble support table 200 by screws, and the X-direction motion module 502 is fixed on the base 501.
- the X-direction motion module connection plate 503 is fixed on the slider of the X-direction motion module 502 by screws, and is used for
- the Y-direction motion module 504 is supported, and the Y-direction motion module connection board 505 is also fixed to the slider of the Y-direction motion module 504 by a screw connection for supporting the single-axis slide table 506, and the Z-direction motion module 508 is directly fixed.
- the Z-direction motion module 508 is connected to the camera fixing plate 507 on the slider, and the camera 509 and the syringe pump 511 are sequentially mounted thereon.
- the lens 510 is directly connected to the camera by a snap.
- a rigid substrate carrying motion module for example, a two-stage Cartesian motion platform package, specifically including a base 601, an X-axis motion module 602, a motion connecting plate 603, a Y-axis motion module 604, and a slider connecting plate 605. , the adsorption connection plate 606, the insulation plate 607, the adsorption platform 608, and the baffle 609.
- the base 601 is directly fixed on the marble support table 200, and has a threaded hole on the upper surface thereof for fixing the X-axis motion module 602.
- the slider of the X-axis motion module 602 is connected with the motion connecting plate 603, and supports the fixed Y-direction motion module 604.
- the slider connecting plate 605 is fixed on the slider of the Y-direction motion module 604 for supporting the adsorption platform 608.
- the adsorption platform 608 and the slider connecting plate 605 are sequentially connected with an adsorption connecting plate 606 and an insulating plate 607, wherein the insulating plate 607 functions to isolate electrical interference.
- the adsorption platform 608 is connected to the insulating edge plate 607, and the outer surface of the adsorption platform 608 is provided with a baffle 609 for shielding the bottom moving platform.
- FIG 16 is a schematic view showing the structure of the outer casing of the printing system, which includes a lower end temperature control case 701, an upper end temperature control case 702, a refrigerator 703, and a heater 704.
- the lower end temperature control box 701 is fixed on the marble support table 200 for isolating the heat emitted by the rigid substrate motion module 600 while avoiding Precision components on the motion platform are affected by print droplets.
- the upper temperature control box 702 is vertically mounted on the lower temperature control box 701 with a partition therebetween, separating 701 and 702 to form a temperature control chamber for the printing area, and the refrigerator 703 and the heater 704 are installed at On the top and side walls of the upper temperature control box 702, the temperature inside the box is controlled in real time by a computer and a sensor.
- the port A on the side wall is the air inlet of the external humidity control module
- the port B is the air inlet of the external humidity control module
- C is the square window opened on the partition plate
- the adsorption platform 608 of the rigid substrate motion module 600 is Extending in the window
- the baffle 609 covers the window to prevent droplets from splashing into the lower case.
- Figure 17 shows the specific flow of pattern printing: print pattern input; pattern format analysis, nozzle unit preheating (loading voltage, ink supply); start printing pattern; pattern detection and motion parameter control on line;
- the control unit in this embodiment includes the control components of the above various components, such as the driver of the motion module motor, the control card and other electrical connections, etc.; vacuum generator; various power sources; industrial computer; temperature, humidity controller; nozzle controller Wait.
- an arrayed electrohydrodynamic printing head of the present invention is shown in Fig. 20.
- the structure is divided into upper and lower layers, the upper layer is a PDMS layer, and the lower layer is a silicon-based array nozzle layer, and the two are connected by bonding.
- the nozzle is based on the principle of current body printing, and the jet is generated from the nozzle by controlling the voltage to form an ink droplet or a liquid line, thereby realizing printing of the target pattern.
- the role of the PDMS layer is to provide an interface for the input of the external solution, and to provide a solution to the flow path of the nozzle layer internally.
- PDMS Since PDMS has the advantages of transparency, stable nature, strong shape, etc., it is widely used in microfluidic chips. field.
- the function of the silicon-based array nozzle layer is to integrate a plurality of tiny nozzles, and each nozzle is provided with a gold electrode connected to an external voltage control circuit as a control interface.
- the small hole etched in the silicon wafer serves as an output port of the solution, and when there is a high voltage electrostatic field between the nozzle layer and the bottom receiving plate, the Taylor cone formed at the nozzle can generate a jet.
- the fabrication process of the silicon-based array nozzle layer adopts a standard semiconductor processing process, and after each mask of the photolithography is designed, photolithography, development, sputtering/ICP etching are respectively performed to form a pre-designed nozzle layer structure.
- the silicon-based array nozzle has the advantages of accurate pattern and stable printing.
- the printing module 500 and the rigid substrate carrying motion module 600 cooperate to move and print a pattern on the rigid substrate.
- the slider is moved to the center of its motion stroke.
- a hard substrate such as a silicon wafer is placed in the center of the adsorption platform, and the vacuum pump is turned on by the control module, and a vacuum is formed on the surface of the vacuum platform, and the substrate is firmly adsorbed on the adsorption platform, and then the movement of the three motion modules of the printing module 500 is adjusted. , so that the nozzle is facing the edge of the substrate, ie the zero point relative to the system.
- the height of the nozzle from the substrate determines the printing mode. After the experiment is calibrated, it can be selected according to the needs. After the specific position is reached, the printing module 500 stops moving and remains stationary during the entire printing process. The rigid substrate carrying motion module 600 moves during printing and is responsible for the formation of the pattern. The state of each module is as shown in FIG.
- the printing process is: print pattern input, pattern format analysis, nozzle unit warm-up (loading voltage, ink supply), select whether the jet vision detection module works, start printing the pattern, and print ends. This kind of work is suitable for small-area, high-precision device printing, such as MEMS, biosensor printing.
- Example 2 Example 2:
- the roll-to-roll film substrate transport module 400 cooperates with the print module 500 to print a pattern on the flexible substrate.
- the roll-to-roll film substrate transport module 400 is responsible for substrate transport in a single direction, and the specific print pattern motion is achieved by the print module 500.
- the roll is mounted on the front end discharge portion discharge roller 420 of the roll-to-roll film substrate conveying module 400, passes through a gap directly between the upper and lower rolls of the pair of rolls 430, is placed above the adsorption platform, and is finally wound around the rear end receiving portion.
- the specific mode and motion state of the receiving roller are shown in Fig. 19.
- the rigid substrate module returns to the initial position, at which point the film substrate is just above the adsorption platform and then remains stationary.
- the printing module 500 stops moving and remains stationary throughout the printing process.
- the height of the nozzle from the substrate determines the printing mode.
- the experiment can be selected according to the needs.
- the printing module 500 is initialized and moved to the zero point of the system, and the printing pattern is started in the printing flow as shown in FIG. 17, in this case, the nozzle is in the two directions and the X-direction motion module of the printing module 500.
- the Y-direction motion module drives the lower movement, completes the motion instruction after the pattern analysis, and cooperates with the printing control to form a pattern, and the roll-to-roll film substrate conveying module remains stationary.
- the print module 500 is reset and returns to zero.
- the roll-to-roll film substrate transport module starts the feed motion, transports the flexible substrate forward, and moves the new print area to the adsorption plate to stop, repeating the printing process.
- This kind of work is suitable for large-area device printing, such as piezoelectric film, solar thin film battery and functional composite materials.
- Example 1 With a single continuous jet printing method, the printing module 500 and the rigid substrate carrying motion module 600 cooperate to move and print a pattern on the sheet substrate.
- the motion module 600 By adjusting the motion module 600 to initialize it, and the X-axis motion module 602, the Y-axis motion module 604, the slider is moved to the center of its motion stroke.
- the PDMS elastic substrate is placed in the center of the adsorption platform, and the vacuum pump is turned on by the control module.
- the surface of the vacuum platform forms a negative pressure, and the substrate is firmly adsorbed on the adsorption platform, and then the movement of the three motion modules of the printing module 500 is adjusted to make the nozzle It is facing the edge of the substrate, that is, the zero point of the system.
- the height between the nozzle and the substrate is adjusted to form a whip phenomenon of the jet, as shown in FIG.
- different corrugated structures can be used. For example, when the substrate speed is 50 mm/s, an overlapping corrugated structure is obtained; at a speed of 100 mm/s, a figure-eight corrugated structure is obtained; at a speed of 200 mm/s, a sinusoidal corrugated structure is obtained.
- the printing module 500 and the rigid substrate carrying motion module 600 cooperate to move and print a pattern on the sheet substrate.
- the motion module 600 By adjusting the motion module 600 to initialize it, and the X-axis motion module 602, the Y-axis motion module 604, the slider is moved to the center of its motion stroke.
- the stretched PDMS elastic substrate is placed in the center of the adsorption platform, and the vacuum pump is turned on by the control module, and a vacuum is formed on the surface of the vacuum platform, the substrate is firmly adsorbed on the adsorption platform, and then the three motion modules of the printing module 500 are adjusted. Move so that the nozzle is facing the edge of the substrate, ie the zero point relative to the system.
- the printing line is basically printed, and after the printing is completed, the elastic substrate is released, as shown in FIG. 23, the sinusoidal corrugated knot can be obtained.
- the motion combination method and the special printing function described above can generate various patterns, and the specific printing method is As illustrated in Figure 1, by means of these three printing methods, a multi-function sensor as shown in Fig. 24 can be printed, which can be used as a strain, temperature and speed sensor for a flexible curved surface.
- the sensor mainly includes electrodes, wires and functional films (strain gauge film, temperature measuring film and speed measuring film) three parts.
- the electrode is sprayed on-demand by point-on-demand, using copper ink to print repeatedly;
- the curved wire is made of silver particles and conductive ink, and is printed by electrospinning; the functional film is sprayed to give different functions. material
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Abstract
一种多功能、高分辨率电流体喷墨打印系统及方法,该打印系统包括:一控制单元(100),一硬质基板承载运动模块(600),一喷印模块(500),一卷到卷薄膜基板输送模块(400),一喷射视觉检测模块(300),由外壳箱体围成的温度、湿度可控的微环境控制单元。其中喷印模块(500)包括控制喷嘴移动的运动平台和喷嘴,实现三种喷印方式调控,同时具有观测基板上图案的喷射视觉检测模块(300);硬质基板承载运动模块(600),用以承载、固定硬质打印介质基板,使所述基板相对喷嘴移动;卷到卷薄膜输送模块(400),用以进给和吸附柔性基板,保证所述柔性基板的表面平整和在运动中无滑移;一喷射视觉检测模块(300),用以检测液滴空间飞行轨迹;一温度、湿度控制模块,用来控制打印腔体内的温度和湿度,保证打印的稳定性。
Description
一种多功能电流体喷墨打印系统及方法
【技术领域】
本发明涉及一种喷墨打印系统, 特别是一种采用电流体驱动的喷墨打印装 置及方法。
【背景技术】
喷墨打印设备具有制造环境友好、 节省打印材料, 操作简单等优点, 近年 来逐渐从传统图像打印领域发展到打印电子、 微流道等领域, 如采用喷墨打印 技术制造柔性电子晶体管、 生物传感器、 太阳能电池、 微流芯片等。 传统喷墨 打印技术主要采用连续和按需打印两种模式, 其中按需式打印又包括压电式和 热气泡式喷墨。 传统的连续打印方法, 通常采用压电晶体振动产生墨滴, 再利 用充电电极对墨液进行充电, 最后利用控制单元将图像信息转换为墨滴偏转距 离的控制信息, 通过改变滴墨穿过的平行电极电压而改变墨滴偏转距离, 在打 印介质上形成图案, 但是这种连续性喷墨打印方式导致墨水浪费严重。 压电式 控制较复杂, 结构尺寸精度要求较高, 压电晶体及其附件的老化、 变形、 随时 会使打印头性能下降, 并且造成喷头寿命短, 工作能耗高, 而且喷射液滴定位 精度不高。 热气泡式由于瞬间局部加热, 对功能性材料有一定选择性, 液滴尺 寸较大。 目前普遍认为按需打印时, 液滴直径为针头直径的 1.89倍, 打印线宽 为 20〜50微米, 如果需要更小的特征尺寸则需要制造更加细小的针头, 这将对 阵列化喷嘴的微制造工艺提出挑战。 由于表面张力的作用, 即使制造出更细的 针头也无法有效缩小液滴的尺寸, 而且容易堵塞针头。 同时, 在打印电子等应 用领域, 墨水多为聚合物、 高质量分数的溶液, 具有粘度大, 密度大等特点, 使得喷嘴容易堵塞并回弹, 无法有效产生液滴。
电子器件的基本结构为点、 线、 薄膜等, 通过微液滴的堆叠形成电子器件, 存在不足: 1 ) 在形成大面积薄膜和微结构阵列的情况下, 效率非常低; 2) 结 构的均匀性较差, 造成结构粗糙不平, 导致电学性能和机械性能难以满足要求, 特别是柔性电子的变形性能要求。
综上所述, 现有的喷墨打印技术存在以下不足: (1 ) 喷印打印分辨率低, 液滴尺寸受限于喷嘴直径;(2)不适应于高粘度聚合物溶液,喷嘴容易堵塞; ( 3 ) 喷嘴制造工艺复杂; (4) 打印大面积薄膜和微结构时, 效率低; (5 ) 打印模式 单一, 无法实现点、 线、 膜的选择性制备。
为了提高喷墨打印的打印性能, 降低打印成本, 拓展其应用领域。 目前, 出现了利用电流体动力技术作为进行喷墨打印的工艺和装备, 主要应用于静电 喷涂(Electrospray)、 静 电纺丝(Electrospinning)和 电流体动力 喷 印 (Electrohysrodynamic jet printing) 方面。 研究表明, 这三种电流体模式, 分别 可以用来制造点、线和薄膜三种结构。如美国专利申请 US 20110187798 Al中采 用了电流体动力喷印方法, 但其喷嘴尺寸较小 (几微米~几百纳米), 易被堵塞, 同时喷嘴距离基板距离较低 100微米, 无法避免喷射高黏度溶液时的电击穿现 象,而且制造面积小, 效率低,仅适用于实验室。美国专利申请 US2008/0003374 A1为原理性阐述, 采用静电喷涂沉积薄膜, 针头与远离针头的环形电极实现墨 水的流变, 但液体最终分裂成小液滴, 缺少基板运动控制, 无法形成均匀的薄 膜图案。美国专利申请 US7326043B2只能进行在水平方向进行纤维的沉积喷印, 喷头无法进行平面内运动, 因此无法满足连续大面积在基板上的沉积, 生产要 求。 美国专利 US8586148B2低压近场纺丝, 而且其工作在非稳态, 液滴经过一 段时间会滴落。
【发明内容】
本发明的目的在于提供一种多功能、 高分辨率的电流体喷墨打印系统, 采 用电流体动力技术, 实现微米 /亚微米点的喷印、 微米 /亚微米线结构的直写和纳 米薄膜的喷涂, 并能够采用片材加工与卷到卷加工进给方式。
为实现上述目的, 按照本发明的一个方面, 提供一种多功能电流体喷印装 置, 可形成多种喷墨打印方式, 从而实现不同类型器材的喷印制造, 其特征在 于, 该喷印装置包括:
支撑台;
喷印模块, 设置在所述支撑台上, 其具有用于喷墨的喷嘴, 用于喷墨到打 印基底上以进行图案打印;
硬质基板承载运动模块, 其设置在所述支撑台上, 以固定承载用于作为图 案打印基底的硬质打印介质基板, 并可带动其相对所述喷印模块运动, 实现在 该硬质打印介质基板上的图案打印; 以及
卷到卷薄膜基板输送模块, 其设置在所述支撑台上, 以输送作为图案打印 基底的柔性打印介质薄膜, 该柔性打印介质薄膜通过相对所述喷印模块运动, 实现在该柔性打印介质薄膜上的图案打印;
通过控制喷嘴和基板间距、 喷墨液体供给流量和 /或喷嘴与基底之间施加的 电压, 从而产生包括单一液滴的按需喷射、 雾化液滴的喷涂或单根连续射流的 直写的多种不同喷印方式, 并结合不同基底, 即可实现各种器件和 /或各种图案 的喷印。
作为本发明的改进, 所述喷印模块包括: 固定设置在支撑台上的底座; 固
定设置在该底座上的可相对其沿第一方向运动的第一方向运动模组; 通过设置 在该第一方向运动模组的运动滑台上的第一方向运动模组连接板安装在该第一 方向运动模组上的第二运动方向模组, 其可相对该第一方向运动模组沿第二方 向运动; 以及通过设置在该第二方向运动模组的运动滑台上的第二方向运动模 组连接板安装在该第二方向运动模组上的第三运动方向模组, 其可相对该第二 方向运动模组沿第三方向运动, 其上安装有注射泵和与其连通用于喷墨的喷嘴。
作为本发明的改进, 所述硬质基板承载运动模块包括: 固定在所述支撑台 上的底座; 第一方向运动模块, 其设置在所述底座上, 可相对其实现沿第一方 向的运动; 第二方向运动模块, 其通过固定设置在所述第一方向运动模块上的 运动连接板安装在所述第一方向运动模块上, 其可相对该第一方向运动模块沿 第二方向运动; 吸附平台, 其通过所述固定设置在所述第二方向运动模块上的 滑块连接板安装在所述第二方向运动模块上并可同歩运动, 该吸附平台用于吸 附固定作为图案打印基底的硬质打印介质基板。
作为本发明的改进, 所述卷到卷薄膜基板输送模块包括前端放料部分和后 端收料部分, 其中所述前端放料部分包括放料底板、 设置在放料底板上的放料 辊和对辊, 薄膜基板通过放料辊释放并穿过所述对辊的两辊之间后输出; 所述 后端收料部分包括收料底板、 设置在该收料底板上的吸附辊、 浮辊和收料辊, 所述从前端放料薄膜输送的薄膜基底通过该吸附辊吸附紧贴, 并进而输送到所 述收料辊进行收料, 所述浮辊设置在两者之间以张紧所述薄膜基底。
作为本发明的改进, 所述放料辊包括磁粉制动器连接板, 磁粉制动器, 连 轴器, 带轴承支座, 气胀轴, 料卷, 其中所述磁粉制动器连接板用于固定磁粉 制动器, 其竖直固定连接在放料底板上, 侧面固定安装磁粉制动器连接板。 所
述磁粉制动器的另一端插入连轴器的连接孔里, 所述气胀轴的光轴与固定在放 料底板上的带轴承支座中的轴承孔穿过, 与连轴器另一端连接, 所述料卷缠绕 在气胀轴的膨胀端, 并保持张紧状态, 以提供薄膜基底材料。
作为本发明的改进, 所述对辊包括平行对置设置的上辊轮和下辊轮, 其两 端通过两对称竖直固定在放料底板上的对辊支撑板支撑, 其中, 对辊支撑板上 端开有缺口, 用于安装气缸, 所述上辊轮与气缸活塞连接, 通过其以调节上下 滚轮的间隙, 所述下辊轮一端与电机的转轴连接, 通过电机驱动下辊轮旋转从 而带动上下辊轮之间的薄膜基底输出。
作为本发明的改进, 所述收料辊包括收料辊电机, 其通过设置在收料底板 上的收料辊电机支撑件支撑, 该收料辊电机的电机轴与离合器一端连接, 一气 胀轴的光轴从固定在收料底板上的带轴承支座中的轴承孔穿过, 并连接在连轴 器的另一端孔内, 所述收料辊轮套装在该气胀轴上, 通过收料辊电机的驱动带 动薄膜以进行收料。
作为本发明的改进, 所述收料辊还包括固定设置在所述收料底板上的磁粉 离合器支撑板, 其用于安装设置磁粉离合器, 用于保证在收料时具有一定的阻 尼, 使收卷张力恒定, 保证料卷紧实。 还包括连轴器, 所述收料辊电机的电机 轴通过该连轴器与磁粉离合器可断开地连接, 所述磁粉离合器另一端与所述离 合器一端连接。
作为本发明的改进, 所述浮辊包括浮辊安装板, 其通过角支连接于收料底 板上, 且垂直于所述收料辊底板, 还包括惰辊及驱动其运动的摩擦气缸, 该惰 辊通过转接板与浮辊安装板连接, 其中所述惰辊包括与所述转接板连接的法兰
支座, 设置在法兰支座上的惰辊轴, 套装在该惰辊轴上的惰辊轮, 其两端套有 带轴承配管并利用轴承盖封装。
作为本发明的改进, 所述吸附辊包括吸附辊轴、 套装在该吸附辊轴外的套 筒、 与所述吸附辊轴一端连接的吸附辊电机, 其中所述吸附辊轴为阶梯心轴, 其轴体外周在轴向上开有键槽, 挡板设置在该键槽中并置于所述吸附滚轴与套 筒之间, 该吸附滚轴相对吸附辊电机的另一端通过轴支座固定于支撑板上, 两 端通过吸附辊端盖封闭, 从而形成密封空间, 通过使该密闭空间形成一定真空 度, 从而通过所述套筒上的小孔将薄膜基底吸附在套筒表面, 并利用吸附辊电 机带动所述套筒的转动, 实现薄膜吸附并进给。
作为本发明的改进, 所述喷印装置还包括喷射视觉观测模块, 其具有观测 部分和相对于其设置在喷墨模块另一端的照明部分, 其中, 所述观测部分包括 调整滑台, 连接板, 高度调整滑台, 相机, 镜头, 其中调整滑台固定设置在支 撑台上, 连接板底部与调整滑台连接, 侧面与高度调整滑台连接, 所述相机固 定在高度调整滑台顶部, 所述镜头采用螺纹与相机连接; 所述照明部分包括光 源, 光源夹具, 转接板, 高度调节滑台, 支撑板, 单轴水平滑台和支撑板, 其 中, 所述单轴水平滑台固定在支撑板上, 支撑板为 L型, 其中底板连接在水平 滑台上, 侧面与高度调节滑台连接, 所述高度调节滑台滑块与转接板连接, 该 转接板另一端连接光源夹具, 光源连接在光源夹具上。
作为本发明的改进, 所述喷印装置还具有外壳, 其设置在支撑台上并罩住 所述喷印模块、 硬质基板承载运动模块和卷到卷薄膜基板输送模块, 且该外壳 还具有下端温度控制箱体、 上端温度控制箱体, 制冷器和加热器, 其中, 所述 下端温度控制箱体固定在支撑台上, 用于隔绝硬质基板运动模块所散发的热量,
所述上端温度控制箱体竖直安装在下端温度控制箱体上, 中间具有将两者隔开 的隔板, 形成对打印区域的温度控制腔体, 所述制冷器和加热器则分别安装在 所述上端温度控制箱体的箱体顶部和侧壁上, 用于实时控制箱体内的温度。
作为本发明的改进,所述喷印模块中的喷嘴为上下两层结构,上层为 PDMS 层, 下层为硅基阵列化喷嘴层, 两者之间利用键合连接, 其中所述 PDMS层的 作用是给外界溶液的输入提供接口, 并在内部提供溶液往喷嘴层的流道, 所述 硅基阵列化喷嘴层的作用是集成多个微小的喷嘴, 并且每个喷嘴处均设有连接 外电压控制电路的金电极, 作为控制接口。 硅片上刻蚀出来的小孔作为溶液的 输出口, 并且当在喷嘴层与底层接收板之间有高压静电场时, 能够使喷嘴处形 成的泰勒锥产生射流。
本发明中, 所述第一方向、 第二方向和第三方向相互垂直。
按照本发明的另一方面, 提供一种利用上述喷印装置进行喷墨打印的方法, 包括:
( 1 ) 根据待打印的图案, 选择打印方式, 包括电喷、 直写和 /或喷涂;
( 2 )根据打印的器件类型选择打印基底材料,包括硬质基板和 /或柔性薄膜;
(3 ) 根据上述确定的打印方式和打印基底, 相应地控制所述喷嘴和基板间 距、 喷墨液体供给流量和 /或喷嘴与基底之间施加的电压, 同时控制所述喷印模 块与硬质基板承载运动模块和 /或卷到卷薄膜基板输送模块的相对运动方向和位 移, 即可实现各种器件和 /或各种图案的喷印。
按照本发明的又一方面,提供一种上述喷印装置在进行微机电系统 MEMS、 生物传感器、 压电薄膜、 太阳能薄膜电池或可屈曲拉伸波纹结构的喷墨打印中
的应用。
本发明中, 通过控制针嘴和基板之间的距离, 液体的黏度和施加电压的大 小实现射流的不同形态, 从而产生单一液滴, 雾化液滴和单根连续射流, 实现 在三种喷墨打印方式的快速切换, 解决了用同一台设备实现不同类型的器件结 构制造的难题。 同时, 借由此原理根据其打印特性, 在同一系统中构建了薄膜 基板卷到卷和硬质基板真空吸附打印模块, 满足了器件对不同基板的要求。 同 时, 配合两套视觉观测模块, 可以实时观测图案的形成情况和空间液滴的飞行 情况。 观测基板图案的视觉系统采用直视方式, 镜头方向和喷嘴一致, 在喷印 图案完成后, 直接观测打印形貌。 观测空间液滴飞行情况的视觉系统则采用背 光方式, 镜头方向在水平方向, 焦平面在喷嘴处。
本发明中, 喷印模块包括控制喷嘴移动的运动平台和喷嘴, 具体调控三种 喷印方式, 同时具有观测基板上图案的视觉系统; 一硬质基板承载运动模块, 用以承载、 固定硬质打印介质基板, 使其相对喷嘴移动; 卷到卷薄薄输送模块, 用以吸附柔性基板, 保证其平整和在运动中无滑移; 一喷射视觉检测模块, 用 以检测液滴空间飞行轨迹, 还可以用于多层套印和基板图案的实时观测, 用于 对打印结构进行光学检测; 一温度湿度控制模块, 用来控制打印腔体内的温度 和湿度, 保证打印的稳定性。
为了实现不同图案的打印, 所采用的关键技术是喷印方式和各个模块中运 动平台的运动配合规划。 优选地, 喷印系统的运动模块至少包括 3 个正交方向 的运动单元, 硬质基板承载运动模块至少包括水平 2个正交方向的运动单元, 卷到卷薄膜输送模块包括 1水平方向运动。
为了实现在多种基板进行图案打印, 按照不同基板可分为两类, 具体模块
的工作方式是: 第一类为在片材基板 (硬质基板或柔性基板) 上的图案打印, 如硅片、 导电玻璃、 钢片、 PET聚合物基板等, 其中采用片材承载运动模块两 运动单元带动基板走出图案轨迹, 喷嘴待打印方式选取后保持固定, 则可以打 印出点、纤维和薄膜的沉积;第二类为采用柔性薄膜的卷材,如聚酯薄膜(PET), 聚酰亚胺薄膜(PI)等, 采用卷到卷薄薄输送模块带动薄膜到打印位置, 喷嘴待 打印方式选取后保持高度固定, 喷印模块的 2正交水平运动单元负责走出图案 轨迹, 则可以在柔性薄膜上打印出点、 纤维和薄膜。
为了实现不同图案的多功能打印, 所采用的关键技术是根据具体的应用对 象, 挑选合适的喷印方式和运动平台的运动。 具体应用如针对全打印 RFID, 采 取第一类和第二类基板运动方式结合单根连续射流制造天线, 再采用按需喷射 方式制造电阻和电感; 针对生物传感器, 采取第一类运动方式结合单根连续射 流制造电极, 结合雾化液滴和第二类基板运动方式制造功能活性层薄膜; 针对 发光二极管, 采取第一类和第二类基板运动方式结合雾化液滴制造片状或者连 续的不同功能薄膜; 针对太阳能电池, 采取第一类和第二类基板运动方式结合 采用单根连续射流在单一基片和连续基片上制造背电极。
为了实现纳米级纤维和液滴的准确定位, 以及打印结构的一致性, 必须保 证打印环境的稳定。 为进一歩提高设备适用性和降低对工况环境的要求, 采用 由外壳箱体密封成的微环境控制单元控制打印腔体内的温度和湿度。 为了避免 传统送风制冷制热引入的缺陷, 微环境控制单元采用半导体加热片与制冷片, 以传导和辐射的方式对空间进行温度控制。 其中外壳箱体采用隔热材料, 保证 温度与环境之间散失减小, 而半导体加热片与制冷片则采用金属, 导热性能好, 能迅速改变自身温度。
为了实现高效打印, 所采用的关键技术是将单一喷嘴替换为阵列化喷嘴, 在单一液滴和单根连续射流打印方式下进行阵列打印。 具体为通过图案的解析, 可单独控制单个喷嘴的喷印状态, 实现每个喷嘴的启动与关闭, 进行高效率的 打印。
本发明中, 所述喷印模块至少包括 3个正交方向的运动单元, 硬质基板承 载运动模块至少包括水平 2个正交方向的运动单元,卷到卷薄膜输送模块包括 1 水平方向运动。
本发明中, 所述基板以真空方式吸附在承载平台上, 其结构上分为上下两 层结构, 上层为 PDMS层, 下层为硅基阵列化喷嘴层, 两者之间利用键合连接。 其中, 硅基阵列化喷嘴层的作用是集成多个微小的喷嘴, 并且每个喷嘴处均设 有连接外电压控制电路的金电极, 作为控制接口。 硅片上刻蚀出来的小孔作为 溶液的输出口, 并且当在喷嘴层与底层接收板之间有高压静电场时, 能够使喷 嘴处形成的泰勒锥产生射流。
本发明中, 所述喷嘴可以为一种阵列化电流体动力喷印头。
本发明中, 所述图案喷印的具体流程为: 打印图案输入; 图案格式解析, 喷嘴单元预热 (加载电压, 墨液开始供给); 开始打印图案; 在线进行图案检测 和运动参数控制; 打印结束。
本发明中, 吸附辊套筒上开有很多小孔, 便于将薄膜吸附在套筒表面有真 空泵使构成的密闭区域
本发明中, 吸附平台与滑块之间有绝缘板, 绝缘板起隔离电气干扰的作用。 与现有的喷印系统相比, 本发明具有以下突出的优点:
( 1 )具有多种喷印模式的集成化处理能力, 可以打印各种类型的器件; (2) 可以选择不同类型的喷墨打印方式, 选择不同类型的基底材料; (3 ) 采用电流 体动力喷印机理, 较传统喷印方法, 喷印精度高, 且受喷嘴直径影响较小; (4) 驱动力采用静电拉力, 射流拖拽力较大, 适用与高粘度溶液; (5 ) 工艺简化, 喷嘴结构简单; (6) 由于采用了视觉观测装置, 可实时观测液滴飞行情况, 提 高了打印性能; (7) 可连续在柔性和刚性基板上大面积沉积各种图案。
【附图说明】
图 1 是本发明实施例的单一液滴、 雾化液滴和单根连续射流的三种不同喷 印状态的效果图;
图 2是本发明实施例的打印装置的总体结构示意图;
图 3是本发明实施例的打印装置的外观示意图;
图 4是本发明实施例的打印装置中喷射视觉检测模块观测部件的示意图; 图 5是本发明实施例的打印装置中喷射视觉观测模块照明部件示意图; 图 6是本发明实施例的打印装置中卷到卷输送柔性薄膜模块的结构示意图; 图 7是本发明实施例的打印装置中卷到卷输送柔性薄膜模块的俯视图; 图 8 是为本发明实施例的打印装置中卷到卷输送柔性薄膜模块放料辊的的 结构示意图;
图 9是本发明实施例的打印装置中卷到卷输送柔性薄膜模块对辊的结构示 意图;
图 10是本发明实施例的打印装置中卷到卷输送柔性薄膜模块后端收料部分 的收料辊的结构示意图;
图 11是本发明实施例的打印装置中卷到卷输送柔性薄膜模块为浮辊的结构 示意图;
图 12是本发明实施例的打印装置中卷到卷输送柔性薄膜模块为吸附辊的爆 炸示意图;
图 13是本发明实施例的打印装置中喷印模块的结构示意图;
图 14是本发明实施例的打印装置中喷印模块的侧视图;
图 15是本发明实施例的打印装置中硬质基板承载运动模块的结构示意图; 图 16是本发明实施例的打印装置中的外壳结构示意图;
图 17是本发明实施例的图案喷印的具体流程;
图 18是本发明实施例的打印装置中进行一种模式打印时各部分运动情况示 意图;
图 19是本发明实施例的打印装置进行另一种模式打印时各部分运动情况示 意图;
图 20是本发明实施例的打印装置在三种打印模式下打印的典型图案; 图 21是本发明实施例的打印装置的阵列化喷嘴的示意图;
图 22是本发明实施例的打印装置直接打印的屈曲波纹结构图案; 图 23是本发明实施例的打印装置的直线应变后的屈曲波纹结构图案; 图 24是本发明实施例的打印装置的多功能传感器的示意图。
【具体实施方式】
为了使本发明的目的、 技术方案及优点更加清楚明白, 下面结合附图和具 体实施例对本发明作进一歩详细说明, 应当理解, 此处所描述的具体实施例仅 仅用以解释本发明, 并不用于限定本发明。 此外, 下面所描述的本发明各个实
施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
根据本发明所揭示的微液滴喷印装置及方法, 此打印系统可以应用于传统 印刷电路板, 柔性电子器件, 而且可以应用于例如生物芯片, 传感器, MEMS 器件等微纳米器件。
如参照图 1 所示, 是在本发明遵循的工艺下, 即通过控制针嘴和基板之间 的距离, 液体的黏度和施加电压的大小实现射流的不同形态, 从而产生的单根 连续射流 (a) ,单一液滴 (b), 和雾化液滴 (c) 的喷印状态。
如图 2、 3所示, 图示为本发明的喷墨打印系统的总体结构示意图和外观图。 其包含有控制单元 (控制柜) 100, 大理石支撑台 200, 喷射视觉检测模块 300, 卷到卷薄膜基板输送模块 400, 喷印模块 500, 硬质基板承载运动模块 600, 打 印机外壳 700。
参照附图 2可知, 本发明中的喷射视觉观测模块 300包括观测部分和照明 两个部分。
如参照图 4, 5所示, 图 4为观测部分, 图 5为照明部分。 其中观测部分包 括调整滑台 311, 连接板 312, 高度调整滑台 313, 相机 315, 镜头 316。 调整滑 台 311直接通过螺钉连接在大理石支撑台 200上, 连接板 312底部与调整滑台 311通过螺钉连接, 侧面与高度调整滑台 313通过螺钉连接, 相机 315固定在高 度调整滑台 313顶部, 镜头 316采用螺纹与相机 315连接。
照明部分包括光源 321, 光源夹具 322, 转接板 323, 高度调节滑台 324, 支撑板 325, 单轴水平滑台 326, 支撑板 327。 单轴水平滑台 326采用螺钉固定 在支撑板 327上, 支撑板 325为 L型, 底板用螺钉连接在水平滑台 326上, 侧 面与高度调节滑台 324连接, 高度调节滑台 324滑块与转接板 323连接, 转接
板 323另一端连接光源夹具 322, 光源 321通过螺钉连接在光源夹具 322上。在 工作时, 光源开启,光线沿着直线直接射入镜头 316中,被相机 315捕获。 如果喷 嘴在光线照射的光路上, 就可以清晰的观测到射流在空间的飞行轨迹, 用以实 时监控喷印状态。
如图 6, 7所示, 卷到卷薄膜基板输送模块 400包括前端放料部分 (放料底 板 410, 放料辊 420和对辊 430) 和后端收料部分 (收料底板 440, 吸附辊 450, 浮辊 460, 收料辊 470), 各部分功能和结构如下:
如图 8所示, 放料辊 420包括磁粉制动器连接板 421, 磁粉制动器 422, 连 轴器 423, 带轴承支座 424, 气胀轴 425, 料卷 426。 磁粉制动器连接板 421用 于固定磁粉制动器, 其为一竖直板, 底面与放料底板 410通过螺钉连接, 侧面 通过带有螺纹孔的法兰与磁粉制动器 422连接。 磁粉制动器 422的另一端插入 连轴器 423 的连接孔里, 通过螺钉夹紧。 气胀轴 425 的光轴从带轴承支座 424 中的轴承孔穿过, 与连轴器 423另一端连接, 带轴承支座 424底部与放料底板 410连接, 以支撑气胀轴 425, 同时保证气胀轴的灵活转动。 连接过程中连轴器 423 ,带轴承支座 424轴承孔,气胀轴 425保持同轴。料卷 426缠绕在气胀轴 425 的膨胀端, 保持张紧状态。
如图 9所示, 对辊 430包括两个对辊支撑板 431, 上辊连接件 432, 两个气 缸 433, 上辊轮 434, 连轴器 435, 电机 436, 电机支撑板 437, 下滚轮 438。 其 连接关系如下, 对辊支撑板 431平行保持镜像安装在放料底板 410上, 其间距 由上辊轮 434长度决定。对辊支撑板 431上端开有缺口,缺口顶端安装气缸 433, 气缸缸体固定在支撑板 431上端缺口处, 气缸活塞连接在上辊连接件 432上, 上辊连接件 432上有轴承孔, 安装有轴承, 上辊轮 434为阶梯轴, 两端分别插
入该轴承孔中。 下辊轮 438与上辊轮 434平行竖直安装, 并保证在气缸活塞完 全伸出时保持相切。 下辊轮 438也为阶梯轴, 一端固定在对辊支撑板 431 的轴 承孔内, 另一端穿过另一对辊支撑板的轴承孔, 轴端与连轴器连接, 并通过螺 钉锁紧。 连轴器 435另一端与电机 436的转轴连接, 电机 436安装在电机支撑 板 437上, 电机支撑板 437则通过螺钉固定在放料底板 410上, 保持和对辊支 撑板 431并列平行。 当电机工作时, 转轴转动, 将随之带动下辊轮 438转动。
如图 10所示, 后端收料部分的收料辊 470包括收料辊电机 471, 收料辊电 机支撑件 472, 连轴器 473, 磁粉离合器 474, 磁粉离合器支撑板 475, 连轴器 476, 带轴承支座 424, 气胀轴 425, 传感器座 477, 光电传感器 478。 收料辊电 机支撑件 472用于固定电机, 底面与收料底板 440通过螺钉连接, 电机轴插入 连轴器 473的圆孔里, 用螺钉夹紧。 连轴器 473的另一端孔里插入磁粉离合器 474的光轴, 并加紧。磁粉离合器 474由磁粉离合器支撑板 475支撑固定在收料 底板 440上, 磁粉离合器支撑板 475的中间开有圆孔, 离合器 473的另一端光 轴连接在另一个连轴器 476的端孔内。 气胀轴 425的光轴从带轴承支座 424中 的轴承孔穿过, 连接在连轴器 476的另一端孔内, 带轴承支座 424底部与收料 底板 440连接, 以支撑气胀轴 425, 同时保证气胀轴 425的灵活转动。 连接过程 中连轴器 423, 带轴承支座 424, 气胀轴 425保持同轴。
如图 11所示,为浮辊的具体结构,包括浮辊固定角支 461,浮辊安装板 462, 导轨滑块 463, 挡板 464, 防撞块 465, 转接板 466, 惰辊 467, 活动转接头 468, 低摩擦气缸 469。 其中惰辊 467包括法兰支座 4671, 惰辊轴 4672, 带轴承配管 4674, 轴承盖 4675。 浮辊安装板 462通过角支 461连接于收料底板 440, 并保 证浮辊安装板 462垂直于收料辊底板 440。低摩擦气缸 469的法兰通过螺钉固定
连接在收料辊底板 440上。
如图 12所示, 为吸附辊的爆炸图。 所述吸附辊 450包括吸附辊电机 451, 吸附辊电机支撑板 452, 联轴器 453, 吸附辊电机连接板 454, 吸附辊端盖 455, 吸附辊轴 456, 挡板 457, 弹簧 458, 轴承 459, 套筒 4510, 支撑板 4511, 轴支 座 4512, 气路转接头 4513。 吸附辊支撑板 4511通过螺钉固定于收料辊底板 440 上。 所述吸附辊轴 456为一阶梯心轴, 可分为轴段 I, 轴段 II, 轴段 III, 如图 所示。 所述吸附辊轴 456的轴段 II上有两键槽, 分布成 60〜70° 的关系。 所述 吸附辊轴 456轴段 I端面的孔与轴段 II表面的孔相连通。 吸附辊轴 456的轴段 I前端通过轴支座 4512固定于支撑板 4511上。 气路转接头 4513通过管螺纹安 装在吸附辊轴 456轴段 I端面。 两挡板 457分别安装于吸附辊轴 456轴段 I上 的键槽内, 所述挡板 457长度应与轴 456 I段长度一致。 弹簧 458安装于挡板 457与轴相接触的底部, 其作用为使挡板 457有沿轴半径向外运动的趋势。两个 吸附辊端盖 455通过轴承 459分别安装在吸附辊轴 456的轴段 I和轴段 III上, 与轴段 Π两端和挡板 457两端接触, 吸附辊端盖 455可克服与挡板 457间的摩 擦力绕轴转动。 套筒 4510分别与两个吸附辊端盖 455密封固定连接, 且保证套 筒 4510轴线与吸附辊端盖 455轴线重合, 套筒 4510内壁与挡板 457的顶面接 触。 安装于轴段 III上的吸附辊端盖 455与吸附辊电机连接件 454通过螺钉固定, 另一端通过一联轴器 453与电机 451连接。 吸附辊电机 451通过吸附辊电机支 撑板 452固定于收料辊底板 440上。 吸附辊端盖 455, 吸附辊轴 456, 挡板 457, 套筒 4510形成一密闭区域。 由真空泵使所述密闭区域达到一定真空度。 通过套 筒 4510上的小孔将薄膜吸附在套筒 4510表面, 通过电机带动套筒转动, 实现 薄膜进给。
图 13, 14为喷印模块, 例如可以是笛卡儿坐标三轴机器人, 其具体包括底 座 501, X方向运动模组 502, X方向运动模组连接板 503, Y方向运动模组 504, Y方向运动模组连接板 505, 单轴滑台 506, 相机固定板 507, Z方向运动模组 508, 相机 509, 镜头 510, 注射泵 511。 底座 501直接通过螺钉连接在大理石支 撑台 200上, X方向运动模组 502固定在底座 501上, X方向运动模组连接板 503通过螺钉固定在 X方向运动模组 502的滑块上, 用于支撑 Y方向运动模组 504, Y方向运动模组连接板 505同样采用螺钉连接固定在 Y方向运动模组 504 的滑块上, 用于支撑单轴滑台 506, Z方向运动模组 508直接固定在支撑单轴滑 台 506上, Z方向运动模组 508滑块上连接相机固定板 507, 上面依次安装相机 509和注射泵 511。 镜头 510通过卡扣直接和相机连接。
图 15为硬质基板承载运动模块, 例如可以是两级笛卡儿运动平台包, 具体 可以括底座 601, X轴运动模块 602, 运动连接板 603, Y轴运动模块 604, 滑 块连接板 605, 吸附连接板 606, 绝缘板 607, 吸附平台 608, 挡板 609。 底座 601直接固定在大理石支撑台 200上, 其上面设计有螺纹孔, 用来固定 X轴运 动模块 602, X轴运动模块 602的滑块与运动连接板 603连接, 支撑固定 Y方 向运动模组 604, 同样滑块连接板 605固定在 Y方向运动模组 604的滑块上, 用来支撑吸附平台 608。吸附平台 608与滑块连接板 605依次连接有吸附连接板 606和绝缘板 607, 其中绝缘板 607起隔离电气干扰的作用。 吸附平台 608连接 在绝缘缘板 607上,吸附平台 608外围装有挡板 609,用于遮挡底下的运动平台。
图 16是打印系统的外壳结构示意图, 其包括下端温度控制箱体 701, 上端 温度控制箱体 702, 制冷器 703, 加热器 704。 下端温度控制箱体 701固定在大 理石支撑台 200上, 用于隔绝硬质基板运动模块 600所散发的热量, 同时避免
运动平台上的精密部件受到打印液滴飞溅的影响。 上端温度控制箱体 702竖直 安装在下端温度控制箱体 701上, 中间具有隔板, 将 701与 702隔开, 形成对 打印区域的温度控制腔体, 制冷器 703和加热器 704则安装在上端温度控制箱 体 702 的箱体顶部和侧壁上, 通过电脑和传感器实时控制箱体内的温度。 其中 侧壁上的 A口是外接湿度控制模块的进气口, B 口是外接湿度控制模块的进气 口, C是隔板上开的方形窗口,硬质基板运动模块 600的吸附平台 608从窗口中 伸出, 挡板 609则遮住窗口, 避免液滴飞溅到下面箱体。
附图 17为图案喷印的具体流程: 打印图案输入; 图案格式解析, 喷嘴单元 预热 (加载电压, 墨液开始供给); 开始打印图案; 在线进行图案检测和运动参 数控制; 打印结束。
本实施例中的控制单元包括以上各个部件的控制器件, 如运动模块电机的 驱动器, 控制卡和其它电气连接等; 真空发生器; 各种电源; 工控机; 温度, 湿度控制器; 喷嘴控制器等。
为了解决传统玻璃毛细管喷嘴和不锈钢喷嘴的打印效率低的问题, 本发明 的一种阵列化电流体动力喷印头, 如附图 20所示。 结构上分为上下两层结构, 上层为 PDMS层, 下层为硅基阵列化喷嘴层, 两者之间利用键合连接。 该喷头 基于电流体喷印的原理, 通过控制电压实现射流从喷嘴处发生, 形成墨滴或者 液线, 从而实现目标图案的打印。 具体来讲, PDMS 层的作用是给外界溶液的 输入提供接口, 并在内部提供溶液往喷嘴层的流道, 由于 PDMS具有透明、 性 质稳定, 可成型强等优点, 广泛应用于微流体芯片的领域。 在本发明实施例中 为了制作 PDMS层, 需要先设计并加工出一组模具, 并且将 PDMS材料的组分 按一定的比例混合 (例如基体: 固化剂 =10:1 ) 形成初始的 PDMS溶液, 然后将
该溶液浇铸到模具中,加温到 100摄氏度,维持 15分钟,即可以得到 PDMS层。 硅基阵列化喷嘴层的作用是集成多个微小的喷嘴, 并且每个喷嘴处均设有连接 外电压控制电路的金电极, 作为控制接口。 硅片上刻蚀出来的小孔作为溶液的 输出口, 并且当在喷嘴层与底层接收板之间有高压静电场时, 能够使喷嘴处形 成的泰勒锥产生射流。 硅基阵列化喷嘴层的制作过程采用标准的半导体加工工 艺, 设计好每次光刻的掩膜板后, 分别进行光刻、 显影、 溅射 /ICP刻蚀来形成 预先设计的喷嘴层结构。 该硅基的阵列化喷嘴具有图案精确, 打印稳定等优点。
由于本发明针对多种基板和三种打印方式, 具有多种打印组合, 下面结合 具体实例介绍几种典型的工作过程:
实例 1 :
喷印模块 500和硬质基板承载运动模块 600配合运动, 在硬质基板上打印 图案。 通过调整运动模块 600, 使其初始化, 及 X轴运动模块 602, Y轴运动模 块 604, 得滑块运动到其运动行程中央。在吸附平台上正中央搁置硅片等硬质基 板, 通过控制模块, 开启真空泵, 真空平台表面形成负压, 基板牢牢吸附在吸 附平台上, 再通过调整喷印模块 500三个运动模块的运动, 使喷嘴正对基板的 边缘, 即相对系统的零点。 喷嘴距离基板的高度, 决定了喷印模式, 可通过实 验标定后, 根据需要, 自行选择。 具体位置到达后, 喷印模块 500停止运动, 在整个打印过程中保持静止状态, 硬质基板承载运动模块 600在打印时运动, 负责图案的成形, 其各个模块状态如图 18所示。其打印流程为: 打印图案输入, 图案格式解析, 喷嘴单元预热 (加载电压, 墨液开始供给), 选择喷射视觉检测 模块是否工作, 开始打印图案, 打印结束。 此种工作情况, 适合小面积, 高精 度的器件打印, 如微机电系统 MEMS, 生物传感器的打印。
实例 2:
卷到卷薄膜基板输送模块 400与喷印模块 500配合运动, 在柔性基板上打 印图案。 此种工作模式下卷到卷薄膜基板输送模块 400负责单一方向的基板输 送, 具体打印图案运动由喷印模块 500实现。 首先料卷安装在卷到卷薄膜基板 输送模块 400的前端放料部分放料辊 420的上, 穿过对辊 430上下辊直接的缝 隙, 放置在吸附平台上方, 最后缠绕在后端收料部分的收料辊上, 其具体的模 式和运动状态如图 19所示。 打印之前, 硬质基板模块回到初始位置, 此时薄膜 基板正好在吸附平台正上方, 然后保持静止状态。 可通过实验标定。 具体位置 到达后, 喷印模块 500停止运动, 在整个打印过程中保持静止状态。 喷嘴距离 基板的高度, 决定了喷印模式, 可通过实验标定后, 根据需要, 自行选择。 打 印开始时, 喷印模块 500初始化, 运动到系统的零点, 如图 17所述的打印流程 中开始打印图案, 在这种情况下, 喷嘴在喷印模块 500两个方向及 X方向运动 模组和 Y方向运动模组带动下运动, 完成图案解析后的运动指令, 配合喷印控 制, 形成图案, 卷到卷薄膜基板输送模块保持静止。 打印完成后, 喷印模块 500 复位, 回到零点。 卷到卷薄膜基板输送模块开始做进给运动, 将柔性基板向前 输送, 待新的打印区域移动到吸附板停止, 重复打印过程。 此种工作情况, 适 合大面积的器件打印, 如压电薄膜, 太阳能薄膜电池和功能复合材料等。
如参照图 21所示, 为三种打印模式下典型的图案(a) 纤维阵列; (b)单一 液滴阵列; (c) 液膜。
采用本方面的打印方式, 还可获得多种可伸缩式新结构, 下面介绍具体两 种可屈曲拉伸波纹结构的制造 :
实例 1 :
采用单根连续射流打印方式, 喷印模块 500和硬质基板承载运动模块 600 配合运动, 在片状基板上打印图案。 通过调整运动模块 600, 使其初始化, 及 X 轴运动模块 602, Y轴运动模块 604, 得滑块运动到其运动行程中央。 在吸附平 台上正中央搁置 PDMS弹性基板, 通过控制模块, 开启真空泵, 真空平台表面 形成负压, 基板牢牢吸附在吸附平台上, 再通过调整喷印模块 500三个运动模 块的运动, 使喷嘴正对基板的边缘, 即相对系统的零点。 调整喷嘴与基板之间 的高度, 形成射流的鞭动现象, 如图 22所示。 配合不同的基板速度, 可以不同 的波纹结构。如在基板速度为 50mm/s时,获得重叠的波纹结构;在速度 100mm/s 时, 获得 8字形波纹结构; 在速度 200mm/s时, 获得正弦波纹结构。
实例 2:
采用单根连续射流打印方式, 喷印模块 500和硬质基板承载运动模块 600 配合运动, 在片状基板上打印图案。 通过调整运动模块 600, 使其初始化, 及 X 轴运动模块 602, Y轴运动模块 604, 得滑块运动到其运动行程中央。 在吸附平 台上正中央搁置已拉伸的 PDMS弹性基板, 通过控制模块, 开启真空泵, 真空 平台表面形成负压, 基板牢牢吸附在吸附平台上, 再通过调整喷印模块 500三 个运动模块的运动, 使喷嘴正对基板的边缘, 即相对系统的零点。 在弹性基本 上打印直线, 待打印完成后, 释放弹性基板, 如图 23所示, 可获得正弦波纹结 采用以上介绍的运动组合方式和特殊打印功能可以产生多种图案, 具体的 喷印方式在图 1中已经阐明, 借由这三种喷印方式, 可以打印如图 24的多功能 传感器, 该传感器可以用作运动柔性曲面的应变, 温度和速度传感器。 该传感 器主要包括电极、 导线和功能薄膜 (测应变薄膜、 测温度薄膜和测速度薄膜)
三部分。 其中电极采用按需的点喷方式, 采用铜墨水反复打印而成; 弯曲的导 线采用银颗粒和导电局和物的墨水, 采用电纺丝方式打印; 功能薄膜则采用喷 雾方式, 答应不同的功能材料
结合以上具体的实施例, 对本发明进行了详细说明, 通过本发明的技术思 想, 本领域的技术人员可以更为广泛的对本发明进行各种变更和修正, 这种变 更和修正也属于本发明领域。
Claims
权 利 要 求
1、 一种多功能电流体喷印装置, 其可执行多种喷墨打印方式, 从而实现不同 类型器件的喷印制造, 其特征在于, 该喷印装置包括:
支撑台 (200);
喷印模块 (500), 设置在所述支撑台 (200) 上, 其具有用于喷墨的喷嘴, 用 于喷墨到打印基底上以进行图案打印;
硬质基板承载运动模块 (600), 其设置在所述支撑台 (200) 上, 以固定承载 用于作为图案打印基底的硬质打印介质基板, 并可带动其相对所述喷印模块(500) 运动, 实现在该硬质打印介质基板上的图案打印; 以及
卷到卷薄膜基板输送模块 (400), 其设置在所述支撑台 (200) 上, 以输送作 为图案打印基底的柔性打印介质薄膜, 该柔性打印介质薄膜可通过相对所述喷印模 块 (500) 运动, 实现在该柔性打印介质薄膜上的图案打印;
通过控制喷嘴和基板间距、 喷墨液体供给流量和 /或喷嘴与基底之间施加的电 压, 从而产生包括单一液滴的按需喷射、 雾化液滴的喷涂和单根连续射流的直写中 的一种或多种喷印方式, 并结合不同的图案打印基底, 即可实现各种器件或各种图 案的喷印。
2、 根据权利要求 1 所述的一种多功能电流体喷印装置, 其中, 所述喷印模块 (500) 包括:
固定设置在支撑台 (500) 上的底座 (501 );
固定设置在该底座 (501 ) 上的可相对其沿第一方向运动的第一方向运动模组 (502);
通过设置在该第一方向运动模组 (502) 上的第一方向运动模组连接板 (503 ) 安装于该第一方向运动模组 (502) 上的第二运动方向模组 (504), 其可相对该第 一方向运动模组 (502) 沿第二方向运动; 以及
通过设置在该第二方向运动模组 (504) 上的第二方向运动模组连接板 (505 ) 安装在该第二方向运动模组 (504) 上的第三运动方向模组 (508 ), 其可相对该第 二方向运动模组 (504) 沿第三方向运动, 其上安装有注射泵 (511 ) 和与其连通用 于喷墨的喷嘴。
3、 根据权利要求 1或 2所述的一种多功能电流体喷印装置, 其中, 所述硬质 基板承载运动模块 (600) 包括:
固定在所述支撑台 (200) 上的基板底座 (601 );
第一方向运动模块 (602), 其设置在所述基板底座 (601 ) 上, 可相对其实现 沿第一方向的运动;
第二方向运动模块 (604), 其通过固定设置在所述第一方向运动模块 (602) 上的运动连接板 (603 ) 安装于所述第一方向运动模块 (602) 上, 其可相对该第一 方向运动模块 (602) 沿第二方向运动;
吸附平台 (608 ), 其通过所述固定设置在所述第二方向运动模块 (604) 上的 滑块连接板 (605 ) 安装于所述第二方向运动模块 (604) 上并可同歩运动, 该吸附 平台 (608 ) 用于吸附固定作为图案打印基底的硬质打印介质基板。
4、根据权利要求 1-3中任一项所述的一种多功能电流体喷印装置, 其中, 所述 卷到卷薄膜基板输送模块 (400) 包括前端放料部分和后端收料部分, 其中所述前 端放料部分包括放料底板 (410)、 设置在该放料底板 (410) 上的放料辊 (420) 和 对辊 (430), 薄膜基底通过放料辊 (420) 释放并穿过所述对辊 (430) 的两辊之间
后输出; 所述后端收料部分包括收料底板 (440)、 设置在该收料底板 (440) 上的 吸附辊 (450)、 浮辊 (460) 和收料辊 (470), 从前端放料薄膜输送的所述薄膜基 底通过该吸附辊 (450) 吸附紧贴, 并进而输送到所述收料辊 (470) 以进行收料, 所述浮辊 (460) 设置在两者之间以张紧所述薄膜基底。
5、根据权利要求 4所述的一种多功能电流体喷印装置,其中,所述放料辊(420) 包括磁粉制动器连接板(421 ),磁粉制动器(422),连轴器(423 ),带轴承支座(424), 气胀轴 (425 ) 和料卷 (426), 其中所述磁粉制动器连接板 (421 ) 底面与放料底板
(410) 固定连接, 其侧面与所述磁粉制动器连接板 (421 ) —端固定连接, 该磁粉 制动器 (422) 的另一端插入连轴器 (423 ) 的连接孔里, 所述气胀轴 (425 ) 的光 轴从固定在放料底板 (410) 上的带轴承支座 (424) 中的轴承孔穿过, 并与连轴器
(423 ) 另一端连接, 所述料卷 (426) 缠绕在气胀轴 (425 ) 的膨胀端, 并保持张 紧状态, 在气胀轴 (425 ) 的驱动下同歩转动以输出薄膜基底。
6、 根据权利要求 4或 5所述的一种多功能电流体喷印装置, 其中, 所述对辊 (430) 包括平行对置的上辊轮 (434) 和下辊轮 (438), 两辊轮端部通过两对称竖 直固定在放料底板 (410) 上的对辊支撑板 (431 ) 支撑, 其中, 对辊支撑板 (431 ) 上端开有缺口, 用于安装气缸 (433 ), 所述上辊轮 (434) 与气缸活塞连接, 通过 其以调节上下辊轮的间隙, 所述下辊轮 (438) —端与电机 (436) 的转轴连接, 通 过该电机 (436) 驱动所述下辊轮 (438 ) 旋转从而带动上下辊轮 (434) 之间的薄 膜基底输出。
7、根据权利要求 4-6中任一项所述的一种多功能电流体喷印装置, 其中, 所述 收料辊 (470) 包括收料辊电机 (471 ), 其通过设置在收料底板 (440) 上的收料辊 电机支撑件 (472) 支撑, 该收料辊电机 (471 ) 的电机轴与离合器 (476) —端连
接, 一气胀轴 (425 ) 的光轴从固定在收料底板 (440) 上的带轴承支座 (424) 中 的轴承孔穿过, 并连接在一连轴器 (476) 的另一端孔内, 所述收料辊轮套装在该 气胀轴 (425 ) 上, 通过收料辊电机 (471 ) 的驱动带动薄膜以进行收料。
8、根据权利要求 7所述的一种多功能电流体喷印装置,其中,所述收料辊(470) 还包括固定设置在所述收料底板 (440) 上的磁粉离合器支撑板 (475 ), 其用于安 装设置磁粉离合器 (474), 用于保证在收料时使收卷张力恒定, 保证料卷紧实, 还 包括连轴器 (473 ), 所述收料辊电机 (471 ) 的电机轴通过该连轴器 (473 ) 后与磁 粉离合器(474)可断开地连接, 所述磁粉离合器(474)另一端与所述离合器(476) 一端连接。
9、根据权利要求 4-8中任一项所述的一种多功能电流体喷印装置, 其中, 所述 浮辊 (460) 包括浮辊安装板 (462), 其通过角支 (461 ) 连接于收料底板 (440) 上, 且垂直于所述收料底板 (440), 还包括惰辊 (467) 及驱动其运动的摩擦气缸, 该惰辊(467 )通过一转接板(466)与浮辊安装板(462)连接, 其中所述惰辊(467) 包括与所述转接板 (466) 连接的法兰支座 (4671 ), 设置在法兰支座 (4671 ) 上的 惰辊轴 (4672), 套装在该惰辊轴 (4672) 上的惰辊轮 (4673 ), 其两端套有带轴承 配管 (4674) 并利用轴承盖 (467 ) 封装。
10、 根据权利要求 4-9中任一项所述的一种多功能电流体喷印装置, 其中, 所 述吸附辊(450)包括吸附辊轴(456)、套装在该吸附辊轴(456)外的套筒(4510)、 与所述吸附辊轴 (456) —端连接的吸附辊电机 (451 ), 其中所述吸附辊轴 (456) 为阶梯芯轴, 其轴体外周在轴向上开有键槽, 该键槽中设置有挡板 (450) 且其置 于所述吸附滚轴 (456) 与套筒 (4510) 之间, 该吸附滚轴 (456) 相对吸附辊电机
(451 ) 的另一端通过轴支座 (4512) 固定于支撑板 (4511 ) 上, 两端通过吸附辊
端盖 (455 ) 封闭, 从而形成密封空间, 通过使该密闭空间形成一定真空度, 从而 通过所述套筒 (4510) 上的小孔将薄膜基底吸附在套筒 (4510) 表面, 并利用吸附 辊电机 (451 ) 带动所述套筒 (4510) 的转动, 实现薄膜吸附并进给。
11、 根据权利要求 1-10中任一项所述的一种多功能电流体喷印装置, 其中, 所 述喷印装置还包括喷射视觉观测模块(300), 其具有观测部分和相对于其设置在喷 墨模块 (500) 另一端的照明部分, 其中, 所述观测部分包括调整滑台 (311 ), 连 接板(312), 高度调整滑台(313 ), 相机(315 )和镜头(316), 其中调整滑台(311 ) 固定设置在支撑台 (200) 上, 连接板 (312) 底部与调整滑台 (311 ) 连接, 侧面 与高度调整滑台 (313 ) 连接, 所述相机 (315 ) 固定在高度调整滑台 (313 ) 顶部, 所述镜头 (316) 采用螺纹与相机 315连接;
所述照明部分包括光源 (321 ), 光源夹具 (322), 转接板 (323 ), 高度调节滑 台 (324), 第一支撑板 (325 ), 单轴水平滑台 (326) 和第二支撑板 (327), 其中, 所述单轴水平滑台 (326) 固定在第二支撑板 (327) —端上, 该支撑板 327的另一 端固定在底座 501上,所述第一支撑板(325 )为 L型,其底板连接在水平滑台(326) 上,侧面与高度调节滑台(324)连接,所述高度调节滑台(324)滑块与转接板(323 ) 连接, 该转接板 (323 ) 另一端连接光源夹具 (322), 所述光源 (321 ) 连接在光源 夹具 (322) 上。
12、 根据权利要求 1-11中任一项所述的一种多功能电流体喷印装置, 其中, 所 述喷印装置还具有外壳, 其设置在支撑台 (200) 上并罩住所述喷印模块 (500)、 硬质基板承载运动模块 (600) 和卷到卷薄膜基板输送模块 (400), 且该外壳还具 有下端温度控制箱体 (701 )、 上端温度控制箱体 (702), 制冷器 (703 ) 和加热器
(704), 其中, 所述下端温度控制箱体 (701 ) 固定在支撑台 (200) 上, 用于隔绝
硬质基板运动模块 (600) 所散发的热量, 所述上端温度控制箱体 (702) 竖直安装 在下端温度控制箱体 (701 ) 上, 中间具有将两者隔开的隔板, 形成对打印区域的 温度控制腔体, 所述制冷器 (703 ) 和加热器 (704) 则分别安装在所述上端温度控 制箱体 (702) 的箱体顶部和侧壁上, 用于实时控制箱体内的温度。
13、 根据权利要求 1-12中任一项所述的一种多功能电流体喷印装置, 其中, 所 述喷印模块中的喷嘴为上下两层结构,上层为 PDMS层,下层为硅基阵列化喷嘴层, 两者之间利用键合连接, 其中所述 PDMS层用于给外界溶液的输入提供接口, 并在 内部设有喷印溶液流向喷嘴层的流道, 所述硅基阵列化喷嘴层集成有多个微小的喷 嘴, 每个喷嘴处均设有电极, 通过所述喷嘴层与图案打印基底之间的高压静电场, 使喷嘴处的喷印溶液形成射流喷出。
14、 利用权利要求 1-13中任一项所述的喷印装置进行喷墨打印的方法, 包括:
( 1 ) 根据待打印的图案, 选择打印方式, 包括电喷、 直写和 /或喷涂;
(2) 根据打印的器件类型选择打印基底材料, 包括硬质基板和 /或柔性薄膜;
( 3 ) 根据上述确定的打印方式和打印基底, 相应地控制所述喷嘴和基板间距、 喷墨液体供给流量和 /或喷嘴与基底之间施加的电压,同时控制所述喷印模块与硬质 基板承载运动模块(600)和 /或卷到卷薄膜基板输送模块(400) 的相对运动方向和 位移, 即可实现各种器件和 /或各种图案的喷印。
15、 权利要求 1-13中任一项所述的喷印装置在进行微机电系统 MEMS、 生物 传感器、 压电薄膜、 太阳能薄膜电池或可屈曲拉伸波纹结构的喷墨打印中的应用。
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| CN103895345A (zh) | 2014-07-02 |
| US9796183B2 (en) | 2017-10-24 |
| CN103895345B (zh) | 2016-01-20 |
| US20160001550A1 (en) | 2016-01-07 |
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