An aerosol jet in-situ 3D printing device and method with optical ink delivery

Abstract

The present invention discloses an aerosol jet in-situ 3D printing device and method with optical ink delivery, relating to the field of circuit printing and manufacturing technology. The device comprises: an optical ink delivery print head, a laser power stabilizer, an inert gas source, a carrier gas mass flow rate regulator, a functional ink atomizer, a sheath gas mass flow rate regulator, a motion platform, and a control system. The optical ink delivery print head integrates the laser beam within the print head. This application achieves the integration of aerosol jet technology and laser sintering technology through the optical ink delivery print head, reducing operational difficulty and laser adjustment errors, improving printing adaptability for complex curved substrates, and avoiding the problem of uneven spot energy distribution caused by tilted external laser irradiation of the ink deposition line, thereby improving the stability and reliability of the printed circuit.

Description

Technical Field

[0001] The present application relates to the field of circuit printing and manufacturing technology, and in particular to an aerosol jet in-situ 3D printing device and method with optical ink delivery. Background Art

[0002] To overcome the limitations of traditional printed circuit boards, conformal printing of functional circuits has become a key development direction. Currently, during the printed circuit manufacturing process, lasers are used to locally heat and solidify the printed pattern. This allows for precise control of the post-processing area and temperature, significantly minimizing damage to the substrate and bonding interface while achieving circuit functionalization. This will help advance technologies such as flexible electronics and wearable devices. Therefore, research into laser-assisted printed circuit manufacturing is needed.

[0003] In the prior art, Chinese patent CN117601420A discloses a laser-assisted aerosol jet in-situ printing device and method, wherein the device includes a laser jet alignment adjustment mechanism, which is equipped with a laser sintering nozzle, an aerosol jet printing nozzle and a CCD high-resolution camera; the laser sintering nozzle is connected to a laser power regulator; the aerosol jet printing nozzle is connected to an air pump via a sheath air flow controller; the aerosol jet printing nozzle is connected to a functional ink atomization device, and the functional ink atomization device is connected to the air pump via a carrier air flow controller; and the CCD high-resolution camera is connected to a camera monitor.

[0004] Chinese patent CN109366980A discloses a laser-assisted electrospray in-situ printing method. Under pressure, "functional material ink" flows from the nozzle. Due to the electrohydrodynamic effect, a stable Taylor cone is formed to eject a stable fine jet, which is then sprayed onto the substrate to form a printed layer. Simultaneously, a laser energy device is used to perform composite processing on the printed layer, emitting a laser beam and irradiating it along the printing trajectory, achieving functional processing such as high-temperature curing and crystallization of the printed structure in situ.

[0005] However, the laser assistants in the above two prior arts are both installed on the outside of the print head. Before formal printing, the spatial position, angle and focus of the laser assistant need to be pre-adjusted, which is difficult to operate and easily leads to laser adjustment errors. At the same time, since the laser assistant in the prior art is located outside the print head, there is a certain angle between the irradiation direction of the laser beam and the jet printing direction of the print head. When the surface of the printed substrate is a complex curved surface, the substrate may block the laser beam, and the printing adaptability to complex curved substrates is poor. In addition, the laser beam of the external laser assistant obliquely irradiates the ink deposition line, which makes the energy distribution of the light spot on the deposition line uneven, and the stability and reliability of the printed circuit are low. Summary of the Invention

[0006] The present application provides an aerosol jet in-situ 3D printing device and method with optical ink delivery, which is used to solve the problems of existing circuit printing and manufacturing technology, such as high difficulty in operation, easy to cause laser adjustment errors; poor adaptability to printing on complex curved substrates; uneven spot energy distribution on the deposition line, and low stability and reliability of the printed circuit.

[0007] On the one hand, the present application provides an aerosol jet in-situ 3D printing device with optical ink delivery, including: an optical ink delivery printing nozzle, a laser power stabilizer, an inert gas source, a carrier gas mass flow rate regulator, a functional ink atomizer, a sheath gas mass flow rate regulator, a motion platform and a control system.

[0008] The optical ink-feeding printing nozzle is respectively connected to the laser power stabilizer, the functional ink atomizer, and the sheath gas mass flow rate regulator; the functional ink atomizer is connected to the inert gas source through the carrier gas mass flow rate regulator; the sheath gas mass flow rate regulator is connected to the inert gas source; and the control system is respectively electrically connected to the laser power stabilizer, the carrier gas mass flow rate regulator, the functional ink atomizer, the sheath gas mass flow rate regulator, and the motion platform.

[0009] The optical inkjet printing nozzle integrates the laser beam inside the printing nozzle.

[0010] In a possible implementation, the optical inkjet printing nozzle includes: a spectrometer, a condenser, an aerosol channel, a sheath gas channel, a laser beam channel, and a printing nozzle housing.

[0011] The beam splitter is fixedly arranged on the inner central axis of the print head housing, and the condenser is fixedly arranged around the inner periphery of the print head housing.

[0012] One end of the aerosol channel is connected to the functional ink atomizer, and the other end enters the print head housing and points to the outlet of the print head housing.

[0013] One end of the sheath gas channel is connected to the sheath gas mass flow rate regulator, and the other end enters the print head housing and points to the outlet of the print head housing.

[0014] One end of the laser beam channel is connected to the laser power stabilizer, and the other end enters the print head housing and points to the outlet of the print head housing.

[0015] In a possible implementation, the portion of the sheath gas channel inside the print head housing is located outside the aerosol channel.

[0016] The portion of the laser beam passageway inside the print head housing is located outside the sheath gas passageway.

[0017] In one possible implementation, during printing, the aerosol channel ejects an aerosol ink flow toward the outlet of the print head housing, the sheath air channel ejects a sheath air flow toward the outlet of the print head housing, and the laser beam channel ejects a laser beam toward the outlet of the print head housing.

[0018] The sheath gas flow is located outside the aerosol ink flow, and the laser beam is located outside the sheath gas flow.

[0019] In a possible implementation, during printing, the focus of the aerosol ink flow coincides with the focus of the laser beam.

[0020] In a possible implementation, the functional ink atomizer adopts an atomization method including ultrasonic atomization, pneumatic atomization, and electro-atomization.

[0021] On the other hand, the present application provides an aerosol jet in-situ 3D printing method with optical ink delivery, comprising the following steps:

[0022] Step 1, preparing functional ink, including: determining functional materials; dispersing the functional materials in a solvent to form a nanoparticle suspension; optimizing the size of nanoparticles in the nanoparticle suspension to obtain functional ink; and adjusting the viscosity and surface tension of the functional ink.

[0023] Step 2, planning the printing path, including: obtaining a model of the substrate and smoothing the surface of the substrate; obtaining the normal vector of the substrate; slicing along the normal vector direction of the substrate to obtain a slice layer; using a contour slicing algorithm to generate a printing path based on the slice layer.

[0024] Step three: Optimize the printing process parameters, including: selecting the nozzle diameter, working distance and volume of the optical inkjet printing nozzle; setting the flow rate of the aerosol ink flow and sheath air flow; setting the power and spot size of the laser beam.

[0025] Step 4: Printing based on the functional ink, the printing path and the printing process parameters.

[0026] In a possible implementation, in step 1, the functional material includes: a conductive material, a semiconductor material, and a dielectric material.

[0027] In a possible implementation, in step 2, the filling strategy of the printing path includes: spiral filling and linear filling.

[0028] The aerosol jet in-situ 3D printing device and method with optical ink delivery in this application has the following advantages:

[0029] The integrated integration of aerosol jet technology and laser sintering technology is realized through the optical ink-feeding printing nozzle, and the laser beam is integrated inside the printing nozzle. There is no need to adjust the laser beam separately, which reduces the difficulty of operation and laser adjustment error. At the same time, the movement of the laser beam and the printing nozzle can be synchronously controlled, which improves the consistency and repeatability of printing; laser sintering and curing can be performed directly on the same position after ink deposition, avoiding the situation where complex curved substrates block the laser beam, improving the printing adaptability to complex curved substrates, and at the same time, there is no need to frequently adjust the position and angle of the laser beam, which improves the convenience of the printing process; by integrating the laser beam inside the printing nozzle, the influence of external environmental changes on the stability of the laser beam is avoided, and the laser beam is vertically irradiated on the ink deposition line as a whole, avoiding the problem of uneven spot energy distribution caused by the external laser obliquely irradiating the ink deposition line, thereby improving the stability and reliability of the printed circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a schematic structural diagram of an aerosol jet in-situ 3D printing device with optical ink delivery provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of the structure of an optical inkjet printing nozzle provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the printing process provided in an embodiment of the present application;

[0034] Figure 4 A physical image of the printing result provided in the embodiment of this application;

[0035] Figure 5 This is a microscopic morphology of the unsintered printing result provided in the embodiment of the present application;

[0036] Figure 6 This is a microscopic morphology of the printing result after laser sintering provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1-Intra-optical inkjet printing nozzle, 2-Laser power stabilizer, 3-Inert gas source, 4-Carrier gas mass flow rate regulator, 5-Functional ink atomizer, 6-Sheath gas mass flow rate regulator, 7-Motion platform, 8-Control system, 9-Substrate, 101-Laser beam, 102-Beam splitter, 103-Condenser, 104-Aerosol channel, 105-Aerosol ink flow, 106-Sheath gas channel, 107-Sheath gas flow, 108-Laser beam channel, 109-Print nozzle housing, 10-Functional circuit. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] like Figures 1 to 3 As shown, an embodiment of the present application provides an aerosol jet in-situ 3D printing device with intra-optical ink delivery, comprising: an intra-optical ink delivery printing nozzle 1, a laser power stabilizer 2, an inert gas source 3, a carrier gas mass flow rate regulator 4, a functional ink atomizer 5, a sheath gas mass flow rate regulator 6, a motion platform 7 and a control system 8.

[0041] The optical ink-feeding printing head 1 is respectively connected to the laser power stabilizer 2, the functional ink atomizer 5, and the sheath gas mass flow rate regulator 6; the functional ink atomizer 5 is connected to the inert gas source 3 through the carrier gas mass flow rate regulator 4; the sheath gas mass flow rate regulator 6 is connected to the inert gas source 3; the control system 8 is respectively electrically connected to the laser power stabilizer 2, the carrier gas mass flow rate regulator 4, the functional ink atomizer 5, the sheath gas mass flow rate regulator 6, and the motion platform 7.

[0042] The optical inkjet printing head 1 integrates the laser beam 101 inside the printing head.

[0043] Specifically, the laser power stabilizer 2 is used to generate a stable laser beam 101 for the inkjet printhead 1 and to adjust the parameters of the laser beam 101, including the power range, spot diameter, and wavelength coverage. In this embodiment, the power range of the laser beam 101 is 150mW-20W, the spot diameter is 10-400μm, and the wavelength coverage range is 400-1500nm. By adjusting the parameters of the laser beam 101, stable in-situ sintering of the deposited ink is achieved.

[0044] Specifically, the inert gas source 3 is used to provide a stable inert gas supply to the optical inkjet printhead 1. In this embodiment, the maximum output pressure of the inert gas source 3 is 3 MPa. During stable printing, the output pressure of the inert gas source 3 is within the range of 0.5-1.5 MPa. When the inert gas output from the inert gas source 3 enters the optical inkjet printhead 1 through the carrier gas mass flow rate regulator 4 and the functional ink atomizer 5, it functions to transport or converge the aerosol ink flow 105. When the inert gas output from the inert gas source 3 enters the optical inkjet printhead 1 through the sheath gas mass flow rate regulator 6, it functions as a sheath gas flow 107 (i.e., a shielding gas) between the aerosol ink flow 105 and the laser beam 101.

[0045] Specifically, the carrier gas mass flow rate regulator 4 is used to adjust the carrier gas mass flow rate (i.e., adjust the flow rate of the aerosol ink flow 105 from the functional ink atomizer 5 into the optical ink printing nozzle 1), and the adjustment range of the carrier gas mass flow rate is 0-400sccm.

[0046] Specifically, the functional ink atomizer 5 is used to atomize the liquid functional ink into an aerosol ink flow 105 .

[0047] Specifically, the sheath gas mass flow rate regulator 6 is used to adjust the sheath gas mass flow rate (ie, adjust the flow rate of the sheath gas 107 entering the optical inkjet print head 1), and the adjustment range of the sheath gas mass flow rate is 0-800 sccm.

[0048] Specifically, the motion platform 7 is used to drive the substrate 9 to move in multiple degrees of freedom (X-axis, Y-axis, Z-axis) according to the printing path under the control of the control system 8, so as to achieve high-precision, high-quality deposition and sintering of the functional circuit 10 on the substrate 9.

[0049] Specifically, the laser power stabilizer 2 , the carrier gas mass flow rate regulator 4 , the functional ink atomizer 5 , the sheath gas mass flow rate regulator 6 , and the motion platform 7 are all controlled by the control system 8 .

[0050] Exemplarily, the optical inkjet printing head 1 includes: a beam splitter 102 , a condenser 103 , an aerosol channel 104 , a sheath gas channel 106 , a laser beam channel 108 and a printing head housing 109 .

[0051] The beam splitter 102 is fixedly disposed on the inner central axis of the print head housing 109 , and the condenser 103 is fixedly disposed around the inner periphery of the print head housing 109 .

[0052] One end of the aerosol channel 104 is connected to the functional ink atomizer 5 , and the other end enters the print head housing 109 and points to the outlet of the print head housing 109 .

[0053] One end of the sheath gas channel 106 is connected to the sheath gas mass flow rate regulator 6 , and the other end enters the print head housing 109 and points to the outlet of the print head housing 109 .

[0054] One end of the laser beam channel 108 is connected to the laser power stabilizer 2 , and the other end enters the print head housing 109 and points to the outlet of the print head housing 109 .

[0055] Specifically, in this embodiment, the working principle of the optical ink feeding print head 1 is as follows: the functional ink atomizer 5 atomizes the liquid functional ink into an aerosol ink flow 105, sends it into the aerosol channel 104 and transmits it to the outlet of the print head housing 109; the sheath gas mass flow rate regulator 6 sends the sheath gas flow 107 into the sheath gas channel 106 and transmits it to the outlet of the print head housing 109; the sheath gas flow 107 converges and surrounds the aerosol ink flow 105, so that the aerosol ink flow 105 is deposited on the surface of the substrate 9 as a higher resolution Functional circuit 10; at the same time, the laser power stabilizer 2 sends the laser beam 101 into the laser beam channel 108 and transmits it to the outlet of the print head housing 109. The laser beam 101 is first vertically incident on the beam splitter 102 in the laser beam channel 108, and is dispersed toward the condenser 103 by the beam splitter 102, and then converged toward the outlet of the print head housing 109 by the condenser 103. The laser beam 101 performs real-time solidification (dielectric ink polymerization reaction) or sintering (conductive ink particle growth) on the ink deposition line on the functional circuit 10 of the substrate 9.

[0056] Illustratively, the portion of the sheath gas channel 106 inside the print head housing 109 is located outside the aerosol channel 104 .

[0057] The portion of the laser beam channel 108 inside the print head housing 109 is located outside the sheath gas channel 106 .

[0058] Illustratively, during printing, the aerosol channel 104 emits an aerosol ink flow 105 toward the outlet of the print head housing 109 , the sheath air channel 106 emits a sheath air flow 107 toward the outlet of the print head housing 109 , and the laser beam channel 108 emits a laser beam 101 toward the outlet of the print head housing 109 .

[0059] The sheath air flow 107 is located outside the aerosol ink flow 105 , and the laser beam 101 is located outside the sheath air flow 107 .

[0060] Specifically, the sheath gas flow 107 is located outside the aerosol ink flow 105, and the laser beam 101 is located outside the sheath gas flow 107, so that the sheath gas flow 107 can converge the aerosol ink flow 105 while protecting the aerosol ink flow 105 from oxidation during sintering and curing.

[0061] Illustratively, during printing, the focus of the aerosol ink flow 105 coincides with the focus of the laser beam 101 .

[0062] Specifically, by coinciding the focus of the aerosol ink flow 105 with the focus of the laser beam 101, the laser beam 101 will only affect the ink deposition line on the functional circuit 10 of the substrate 9 when performing real-time solidification or sintering, and will not affect the substrate 9.

[0063] Exemplarily, the atomization methods adopted by the functional ink atomizer 5 include: ultrasonic atomization, pneumatic atomization and electro-atomization.

[0064] Specifically, in this embodiment, the functional ink atomizer 5 uses ultrasonic atomization. When using ultrasonic atomization, the piezoelectric ceramic plate provides a frequency range of 200kHz-10MHz, and the input voltage is adjustable within a range of 15-60V. The droplet diameter of the generated aerosol ink flow 105 is 1-5μm, thereby achieving the printing of fine circuit patterns.

[0065] The present application also provides an aerosol jet in-situ 3D printing method with optical ink delivery, comprising the following steps:

[0066] Step 1, preparing functional ink, including: determining functional materials; dispersing the functional materials in a solvent to form a nanoparticle suspension; optimizing the size of nanoparticles in the nanoparticle suspension to obtain functional ink; and adjusting the viscosity and surface tension of the functional ink.

[0067] Step 2, planning the printing path, including: obtaining a model of the substrate 9 and smoothing the surface of the substrate 9; obtaining a normal vector of the substrate 9; slicing along the normal vector direction of the substrate 9 to obtain a slice layer; using a contour slicing algorithm to generate a printing path based on the slice layer.

[0068] Step three, optimizing the printing process parameters, including: selecting the nozzle diameter, working distance and volume of the functional ink of the optical inkjet printing nozzle 1; setting the flow rate of the aerosol ink flow 105 and the sheath gas flow 107; setting the power and spot size of the laser beam 101.

[0069] Step 4: Printing based on the functional ink, the printing path and the printing process parameters.

[0070] Illustratively, in step one, the functional material includes: a conductive material, a semiconductor material, and a dielectric material.

[0071] Illustratively, in step 2, the filling strategy of the printing path includes: spiral filling and linear filling.

[0072] Specifically, the conductive materials in the functional materials include silver nanoparticles and copper nanoparticles; the semiconductor materials include carbon nanotubes and graphene; and the dielectric materials include acrylates. Conductive and semiconductor materials are commonly used in the fabrication of circuits, antennas, and passive electronic components, while dielectric materials are typically used in the fabrication of insulating and encapsulating layers between different conductive layers. In this embodiment, the functional material is silver nanoparticles, a conductive material.

[0073] Commonly used solvents include: water, ethylene glycol, isopropyl alcohol; in order to improve dispersibility and stability, a dispersant (such as polyvinyl pyrrolidone) can also be added to the solvent.

[0074] The size of the nanoparticles is usually controlled between 1nm-100nm to ensure that the ink has good fluidity and jetting performance, and the diameter of the resulting functional ink droplets is 1-5μm.

[0075] When adjusting the viscosity and surface tension of functional inks, thickeners (such as hydroxyethyl cellulose) or solvent mixtures are typically added to adjust the viscosity, and surfactants are added to adjust the surface tension. For functional inks used with ultrasonic atomization, the viscosity adjustment range is 0-20 cp, while for functional inks used with pneumatic atomization, the viscosity adjustment range is 0-2000 cp.

[0076] Specifically, in this embodiment, 3D scanning technology is used to obtain the model of the substrate 9 and perform surface smoothing, thereby eliminating noise and small defects and improving model accuracy. In other possible embodiments, CAD software may also be used.

[0077] By analyzing the normal vector of the substrate 9, the printing direction can be determined to ensure that the aerosol ink flow 105 generated by the functional ink can be accurately deposited at the target position to form an ink deposition line.

[0078] Slicing is performed along the normal vector direction of the substrate 9, and the obtained slice layer remains conformal to the curved surface of the substrate 9. The slice thickness is adjusted according to the curved surface change of the substrate 9 to ensure a smooth transition between layers. The printing layer thickness is determined by the volume and coverage area of ​​the deposited ink deposition line.

[0079] In this embodiment, a contour slicing algorithm is used to generate a printing path based on the sliced ​​layers, adapting to the geometry of substrate 9. This algorithm is particularly effective when the surface of substrate 9 is complex and curved. When filling each layer, spiral or linear filling strategies are typically used to ensure structural strength and stability. The spacing between adjacent ink deposit lines is designed to be half the width of a single ink deposit line to ensure overlap and coverage between the ink deposit lines, improving conductivity and reducing printing defects.

[0080] Specifically, the nozzle diameter, working distance and volume of the functional ink of the optical inkjet printing head 1 are selected appropriately according to the size of the substrate 9 and the size of the printed pattern of the functional circuit 10. The commonly used nozzle diameter is 100-400μm, the working distance is 2-5mm, and the volume of the functional ink is generally 2mL.

[0081] The flow rate of aerosol ink stream 105 is generally controlled within a range of 0-400 sccm, the flow rate of sheath gas stream 107 is generally controlled within a range of 0-800 sccm, and the line width of the ink deposited line is generally controlled within a range of 10-400 μm. In this embodiment, ultrasonic atomization is employed, and the piezoelectric ceramic chip used provides a frequency range of 200 kHz-10 MHz, with an adjustable input voltage range of 15-60 V.

[0082] In this embodiment, the power of the laser beam 101 is in the range of 150 mW-20 W, the spot diameter is in the range of 10-400 μm, and the wavelength coverage range is in the range of 400-1500 nm. By adjusting the parameters of the laser beam 101, stable in-situ sintering of the deposited ink is achieved.

[0083] Based on the configured functional ink, planned printing path, and optimized printing process parameters, printing can be performed using an aerosol jet in-situ 3D printing device with optical ink delivery in the present application.

[0084] like Figure 4 As shown, it is a physical picture of the printing result of the present application. It can be seen that by printing with the functional ink prepared by silver nanoparticles, combined with an optically-integrated ink-feeding aerosol jet in-situ 3D printing device and an optically-integrated ink-feeding aerosol jet in-situ 3D printing method of the present application, when manufacturing the functional circuit 10, an ink deposition line width of 100 μm can be achieved, which not only ensures the surface uniformity and good morphology of the functional circuit 10, but also ensures that the ink is sintered and solidified during the deposition process, thereby improving the circuit performance and reliability.

[0085] like Figure 5 and Figure 6 The following images show the microscopic topography of the printed circuit before and after laser sintering. It can be seen that after in-situ sintering by laser beam 101, the silver nanoparticles in the ink deposit lines grow and bond with each other, forming a stable and efficient conductive path. In contrast, the silver nanoparticles in the unsintered ink deposit lines are separated and fail to form a continuous conductive path. Therefore, in-situ sintering by laser beam 101 significantly improves the performance and reliability of functional circuit 10.

[0086] The embodiment of the present application realizes the integrated integration of aerosol injection technology and laser sintering technology through the optical inkjet printing nozzle 1, and integrates the laser beam 101 inside the printing nozzle. There is no need to adjust the laser beam 101 separately, which reduces the operation difficulty and laser adjustment error. At the same time, the movement of the laser beam 101 and the printing nozzle can be synchronously controlled, thereby improving the consistency and repeatability of printing; laser sintering and curing can be performed directly on the same position after ink deposition, thereby avoiding the situation where the complex curved surface substrate blocks the laser beam 101, thereby improving the printing adaptability to complex curved surface substrates, and at the same time, there is no need to frequently adjust the position and angle of the laser beam 101, thereby improving the convenience of the printing process; by integrating the laser beam 101 inside the printing nozzle, the influence of external environmental changes on the stability of the laser beam 101 is avoided, and at the same time, the laser beam 101 is vertically irradiated on the ink deposition line as a whole, thereby avoiding the problem of uneven spot energy distribution caused by the external laser obliquely irradiating the ink deposition line, thereby improving the stability and reliability of the printed circuit.

[0087] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0088] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. An aerosol jet in-situ 3D printing device with optical ink delivery, characterized in that: include: Inkjet printing nozzle, laser power stabilizer, inert gas source, carrier gas mass flow rate regulator, functional ink atomizer, sheath gas mass flow rate regulator, motion platform and control system; The optical ink feeding printing nozzle is respectively connected to the laser power stabilizer, the functional ink atomizer, and the sheath gas mass flow rate regulator; the functional ink atomizer is connected to the inert gas source through the carrier gas mass flow rate regulator; the sheath gas mass flow rate regulator is connected to the inert gas source; the control system is respectively electrically connected to the laser power stabilizer, the carrier gas mass flow rate regulator, the functional ink atomizer, the sheath gas mass flow rate regulator, and the motion platform; The optical inkjet printing nozzle integrates the laser beam inside the printing nozzle; The optical inkjet printing nozzle comprises: a spectroscope, a condenser, an aerosol channel, a sheath gas channel, a laser beam channel and a printing nozzle housing; The beam splitter is fixedly arranged on the inner central axis of the print head housing, and the condenser is fixedly arranged around the inner periphery of the print head housing; One end of the aerosol channel is connected to the functional ink atomizer, and the other end enters the print head housing and points to the outlet of the print head housing; One end of the sheath gas channel is connected to the sheath gas mass flow rate regulator, and the other end enters the print head housing and points to the outlet of the print head housing; One end of the laser beam channel is connected to the laser power stabilizer, and the other end enters the print head housing and points to the outlet of the print head housing; The portion of the sheath gas channel inside the print head housing is located outside the aerosol channel; The portion of the laser beam passageway inside the print head housing is located outside the sheath gas passageway.

2. The aerosol jet in-situ 3D printing device with optical ink delivery according to claim 1, characterized in that: During printing, the aerosol channel emits an aerosol ink flow toward the outlet of the print head housing, the sheath air channel emits a sheath air flow toward the outlet of the print head housing, and the laser beam channel emits a laser beam toward the outlet of the print head housing; The sheath gas flow is located outside the aerosol ink flow, and the laser beam is located outside the sheath gas flow.

3. The aerosol jet in-situ 3D printing device with optical ink delivery according to claim 2, characterized in that: During printing, the focus of the aerosol ink stream coincides with the focus of the laser beam.

4. The aerosol jet in-situ 3D printing device with optical ink delivery according to claim 1, characterized in that: The atomization methods adopted by the functional ink atomizer include ultrasonic atomization, pneumatic atomization and electric atomization.

5. An aerosol jet in-situ 3D printing method with internal ink delivery, using an aerosol jet in-situ 3D printing device with internal ink delivery according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1, preparing functional ink, including: determining functional materials; dispersing the functional materials in a solvent to form a nanoparticle suspension; optimizing the size of nanoparticles in the nanoparticle suspension to obtain functional ink; and adjusting the viscosity and surface tension of the functional ink; Step 2: planning the printing path, including: obtaining a model of the substrate and smoothing the surface of the substrate; obtaining a normal vector of the substrate; slicing along the normal vector direction of the substrate to obtain a slice layer; and generating a printing path based on the slice layer using a contour slicing algorithm; Step 3: Optimize the printing process parameters, including: selecting the nozzle diameter, working distance, and volume of the functional ink for the optical inkjet print head; setting the flow rates of the aerosol ink flow and sheath gas flow; and setting the power and spot size of the laser beam. Step 4: Printing based on the functional ink, the printing path and the printing process parameters.

6. The aerosol jet in-situ 3D printing method with optical ink delivery according to claim 5, characterized in that: In step 1, the functional material includes: a conductive material, a semiconductor material or a dielectric material.

7. The aerosol jet in-situ 3D printing method with optical ink delivery according to claim 5, characterized in that: In step 2, the filling strategies of the printing path include: spiral filling and linear filling.

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