Electrochemical deposition preparation method of micro sugarcoated haw-shaped symmetrical antenna structure

Abstract

The invention discloses an electrochemical deposition preparation method of a micro sugarcoated haw-shaped symmetrical antenna structure, which comprises the following steps: S1, carrying out pressurization experiment simulation on the tail end of a glass microprobe in an MCED system through COMSOL software to obtain correlation characteristics of droplet bridge forms at the tip of the glass microprobe under different pressures; s2, adding a pressurizing assembly in the MCED system, and applying pressure to the glass microprobe through the pressurizing assembly under a sealing condition, so that the droplet bridge is expanded and enlarged; s3, feeding back the spatial position of the tail end of the glass microprobe and the droplet form to the MCED controller in real time based on an image processing method of visual detection; and S4, the MCED controller adjusts the droplet form of the tip of the probe and the spatial height of the glass microprobe based on the feedback of the S4, thereby completing the preparation of the micro sugar-coated haw-shaped symmetric antenna structure. According to the electrochemical deposition preparation method of the micro sugar-coated haw-shaped symmetrical antenna structure, under the condition that the preparation stability is guaranteed, micro-nano manufacturing of a complex structure is completed, and the method has wider adaptability.

Description

Technical Field

[0001] The present invention relates to the field of metal micro-nano structure preparation, and more specifically, to an electrochemical deposition preparation method of a micro-sugar-fruit-shaped symmetrical antenna structure used in the medical, industrial and aviation fields. Background Art

[0002] With the increasing demand for micro-nano structures and in-depth exploration, the technology used to manufacture 3D micro-nano structures with controllable shape quality and detect the morphology of micro-nanoscale objects has become increasingly important. Among them, droplet confinement electrochemical deposition (MCED) has great development potential in the field of additive manufacturing (AM) for 3D printing of metals at the microscale. It mainly uses electrochemical deposition technology to obtain metal elements by using the electron reduction reaction of metal cations. The specific implementation method is to form a stable micro-liquid current bridge between the outlet of the pipette filled with metal ion solution and the anode substrate, and the metal is deposited on the substrate. The ideal metal shape is obtained by moving the pipette and depositing layers of metal.

[0003] Among them, there are many factors that affect MCED, such as: electrolyte solution concentration, inter-electrode gap, deposition voltage, glass microprobe opening, etc. At present, the research on MCED is gradually deepening, usually by applying an external energy field to it to explore the influence of factors such as temperature, electric potential, and magnetic field on the efficiency, stability, and surface quality of deposition. Through in-depth research, many research teams have found that changing the shape of the opening of the glass microprobe tip, adjusting parameters, and combining with other high-end technologies can prepare complex structures, but these preparation methods have low success rates, high costs, and poor stability. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0005] In order to achieve these purposes and other advantages of the present invention, a method for preparing a micro-sugar gourd-shaped symmetrical antenna structure by electrochemical deposition is provided, comprising:

[0006] S1. Use COMSOL software to simulate the pressurization experiment on the tail end of the glass microprobe in the MCED system to obtain the correlation characteristics of the droplet bridge morphology at the tip of the glass microprobe under different pressures;

[0007] S2, adding a pressurizing component to the MCED system to apply pressure to the glass microprobe through the pressurizing component under a sealed condition, so that the droplet bridge expands;

[0008] S3, an image processing method based on visual detection, feeds back the spatial position of the glass microprobe tail and the droplet morphology to the MCED controller in real time;

[0009] Based on the droplet morphology fed back by S4, the S4 and MCED controllers adjust the pressure through the pressurizing component to achieve the control of the droplet morphology at the probe tip;

[0010] The MCED controller adjusts the spatial height of the glass microprobe based on the spatial position fed back by S4 to complete the preparation of the micro-sugar-shaped symmetrical antenna structure on the substrate.

[0011] Preferably, in S1, the association characteristic is:

[0012] When positive pressure is applied to the inside of the glass microprobe, the droplet bridge morphology at the probe tip expands and becomes larger;

[0013] When negative pressure is applied to the inside of the glass microprobe, the droplet bridge morphology at the probe tip shrinks.

[0014] Preferably, in S2, the pressurizing component is configured to include:

[0015] A syringe connected to the patch clamp inside the glass microprobe via a flexible tube;

[0016] A push plate disposed spatially opposite to the push rod on the syringe;

[0017] A telescopic mechanism connected to the push plate through a mounting seat;

[0018] Wherein, the push plate is provided with a pressure sensor at the position in contact with the push rod, and the syringe is connected with the inside of the glass microprobe through a hose and a patch clamp to form a sealed environment.

[0019] Preferably, in S4, the regulation of the droplet morphology refers to:

[0020] During the electrochemical deposition process, if the droplet expansion diameter exceeds a given error range, the pressurizing component is controlled to output negative pressure to make the droplet bridge smaller;

[0021] During the electrochemical deposition process, if the droplet bridge becomes smaller due to the change in the probe position during the pulling process, the pressure component is controlled to output positive pressure to make the droplet bridge larger.

[0022] Preferably, in S3, the image processing method for visual detection includes:

[0023] S30, preprocessing the image data collected by the camera or the webcam;

[0024] S31, performing an opening operation on the preprocessed image to reduce edge noise;

[0025] S32, performing contour detection on the image after the open operation processing to obtain contour information corresponding to the tip of the glass microprobe, the shape of the droplet bridge, and the shape of the sediment, and feeding it back to the MCED controller;

[0026] S33, the MCED controller compares each value in the received droplet bridge profile information with the pre-stored droplet bridge standard comparison sample, and if it is greater than the profile of the droplet bridge standard comparison sample, controls the pressurizing component to apply negative pressure to the liquid surface, otherwise applies positive pressure;

[0027] The MCED controller calculates the distance between the sediment and the glass probe based on the received sediment profile information. If the distance is less than the threshold, the Z-axis motor is controlled to move upward to pull the glass probe upward; otherwise, the Z-axis motor is controlled to move downward to adjust the spatial position of the mobile probe.

[0028] Preferably, the preprocessing includes graying, equalizing, and binarizing the image;

[0029] The opening operation refers to performing corrosion and expansion operations on the image.

[0030] The present invention includes at least the following beneficial effects: The present invention proposes a method for making a micro-sugar-fruit-shaped symmetrical antenna using the MCED method, which completes micro-nano manufacturing of complex structures while ensuring preparation stability, and has wider adaptability.

[0031] The present invention proposes a control method. At present, the diameter of the MCED deposit is mainly determined by the size of the droplet bridge due to the size of the glass microprobe opening. However, this method proposes that under the same opening diameter, the diameter of the deposit can be changed by adjusting the droplet bridge size.

[0032] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the MCED technology principle used in the present invention;

[0034] Figure 2 It is an assembly diagram of the pressurizing assembly used in the present invention;

[0035] Figure 3 A diagram of a sealed patch clamp model used in the present invention;

[0036] Figure 4 Schematic diagram of the preparation method of the present invention;

[0037] Figure 5 Schematic diagram of the droplet bridge morphology in the present invention;

[0038] Figure 6 It is a control flow chart of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0040] In order to solve the problem of complex structure preparation, the present invention proposes a method for preparing a micro-sugar-fruit-shaped symmetrical antenna structure. To explore the root of MCED, its key reaction is in the meniscus area where the anode and the cathode are connected. If the connection area can be controlled, the structural morphology of the metal deposition can be controlled. In response to this problem, through research and experiments, it was found that applying pressure to the electrolyte solution in the glass microprobe can regulate the morphology of the droplet bridge. Therefore, the present invention proposes to prepare a micro-sugar-fruit-shaped symmetrical antenna structure by controlling the droplet morphology at the tip of the probe.

[0041] In the MCED technology of the present invention, the droplet bridge is a key reaction area in the MCED deposition process. Changes in the external environment will have a certain impact on the morphology of the droplet bridge. At the same time, changes in the morphology of the droplet bridge will cause changes in the deposition structure and ion current.

[0042] The present invention firstly establishes a 1:1 physical simulation model through COMSOL software, simulates the pressurization experiment on the tail end of the glass microprobe, and analyzes the simulation results. It is found that applying positive pressure will cause the droplet bridge morphology of the probe tip to expand and become larger; applying negative pressure will cause the droplet bridge morphology of the probe tip to shrink.

[0043] Subsequently, a miniature pressurizing component was developed, which is composed of a high-precision miniature pressure sensor and a small-stroke lead screw. Figure 2 Insert the glass microprobe into Figure 3 The front end of the patch clamp shown in the figure is tightly connected. At the same time, since the front end of the patch clamp is equipped with an electrode wire, a circuit can be formed when the probe contacts the substrate to achieve the deposition of metal ions. The pressurizing component is used to slowly infuse the solution into the glass microprobe under sealed conditions (it should be noted that since the entire device is sealed, the syringe in the pressurizing component is filled with solution. When adjusting the pressure of the glass microprobe, pressurization can be achieved by squeezing the solution into the glass needle, and vice versa), thereby applying pressure and regulating the droplet morphology at the tip of the probe. By using the pressurizing component to conduct tail end pressurization experiments on the glass microprobe, it is verified that the deposition structure can be regulated by adjusting the droplet bridge morphology during the MCED deposition process, thereby preparing complex structures.

[0044] By using this pressurizing component, when preparing a micro-sugar gourd-shaped symmetrical structure, it was found that as the deposition process progressed, the height of the copper column increased, and the gap between the probe tip and the copper column gradually decreased, causing the droplet bridge at the probe tip to be squeezed a second time and the shape to change again. To address this problem, the present invention proposes to use a visual detection method to feedback control the solution pressure and the vertical movement of the probe. During the electrochemical deposition process, a camera is used to observe the morphology of the droplets. If the droplets expand too much and the diameter exceeds the given error range, the micro pressurizing component outputs negative pressure to make the droplet bridge smaller. If the droplet bridge becomes smaller due to the pulling of the probe, the micro pressurizing component outputs positive pressure to make the droplet bridge larger. Figure 5 At the same time, the distance between the sediment and the glass probe is calculated. If it is too small, the Z-axis motor is controlled to pull the glass probe upward; if the gap is too large, the Z-axis motor is controlled to move the probe downward. According to this feedback control method, the stable preparation of the micro-tanghulu-shaped symmetrical antenna structure is achieved.

[0045] The invention is theoretically reasonable, and the rationality and feasibility of the method are verified through simulation analysis and experiments, and has high application value in the field of micro-nano manufacturing of complex structures.

[0046] Example 1

[0047] This example provides a method for preparing a micro-tanghulu symmetrical antenna structure based on droplet-confined electrodeposition, wherein the MCED method involved has a DC and AC power supply, an adjustable DC power supply, such as Figure 1 As shown. The DC power supply provides energy for metal deposition, the AC power supply is used to detect the distance between the probe tip and the substrate, and the adjustable DC power supply is used to adjust the size of the deposition current to ensure the stability of the deposition current during the deposition process. At the same time, the existing MCED experimental platform has been improved, and a miniature pressurizing component has been added to actively control the morphology of the droplet bridge.

[0048] The principle of this example is: during the MCED deposition process, the droplet bridge is the key reaction area in the MCED technology ( Figure 1 The metal ions in the solution are connected to the negative electrode substrate at the droplet bridge, gaining electrons, and are reduced to metal elements to form the corresponding metal structure. Therefore, in view of this key factor affecting electrochemical deposition, a pressurized component is designed in this example to regulate the droplet morphology during the deposition process.

[0049] Principle of pressurized components: control Figure 2The stepper motor 1 rotates, driving the push plate 2 on the small stroke lead screw to move, wherein the push plate 2 is equipped with a high-precision pressure sensor, which can collect the thrust of the push rod 3 of the sealed syringe 4 during the horizontal movement. Since the syringe 4 is connected to the patch clamp 7 through the hose 5, and the glass microprobe 6 is inserted into the front end of the patch clamp 7 to achieve a sealed connection, the syringe is also connected to the inside of the glass microprobe 6 through the hose 5, and the solution can be input into it. According to Pascal's principle, the liquid pressure in a sealed environment is equal everywhere, and then according to the effect of the force and the reaction force, the approximate value of the solution pressure can be obtained through the pressure sensor, and then the solution pressure inside the glass microprobe can be detected.

[0050] Principle of control algorithm: Based on the image processing method of visual detection, the image collected by the camera is processed, the droplet morphology is analyzed, and the micro-pressurization component and Z-axis motor are controlled to eliminate the influence of the droplet bridge morphology change caused by the squeezed droplets as the sediment grows, and the automatic control printing of the micro-tanghulu-shaped symmetrical antenna structure is realized, such as Figure 6 As shown in FIG. 1 , the specific operation flow of the image processing method based on visual detection includes:

[0051] Step 1: pre-process the image data collected by the camera and convert it into a black and white image by grayscale, equalization, and binarization;

[0052] Step 2: Open the binary image to erode and dilate it to reduce edge noise; then, perform contour detection to detect the morphology of the glass microprobe tip, droplet bridge morphology, and sediment;

[0053] Step three, the detection result is fed back to the MCED controller, and the MCED controller controls the actuator based on the detection result (the actuator includes: a servo driver for controlling the change of the substrate position, and a pressurizing component for controlling the liquid surface pressure inside the glass microprobe, that is, negative pressure is added when it is detected that the contour is large, and positive pressure is added when the contour is small. The positive or negative pressure is achieved by the forward and reverse rotation of the lead screw. Because the horizontal displacement of the lead screw is very small, whether it is forward or reverse, the motor basically rotates half a circle, and the morphological changes are checked through the visual detection device, and the value of the pressure sensor is obtained through the MCED controller for the next step of control. In the whole process, various adjustments are based on the change of droplet morphology) to perform corresponding actions to achieve structure printing.

[0054] Example 2

[0055] The present invention provides a method for preparing a complex structure, such as Figure 4 As shown, taking the micro-sugar gourd-shaped symmetrical antenna structure as an example, the preparation process includes:

[0056] During the deposition process, first, the glass microprobe is pressurized by a micro-pressurization device to expand the droplet bridge;

[0057] Secondly, the droplet bridge morphology is monitored by visual inspection, and the micro-pressurization device is feedback-controlled to prevent the droplet bridge morphology from changing;

[0058] Again, as the electrochemical deposition proceeds, the Z-axis motor is controlled to move to achieve the preparation of the antenna structure.

[0059] The above solution is only an illustration of a preferred embodiment, but is not limited thereto. When implementing the present invention, appropriate replacement and / or modification can be performed according to user needs.

[0060] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Without departing from the general concept defined by the claims and equivalent scopes, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. An electrochemical deposition preparation method for a micro-sugar gourd-shaped symmetrical antenna structure, characterized in that: include: S1. Use COMSOL software to simulate the pressurization experiment on the tail end of the glass microprobe in the MCED system to obtain the correlation characteristics of the droplet bridge morphology at the tip of the glass microprobe under different pressures; S2, adding a pressurizing component to the MCED system to apply pressure to the glass microprobe under a sealed condition through the pressurizing component to expand the droplet bridge; S3, an image processing method based on visual detection, feeds back the spatial position of the glass microprobe tail and the droplet morphology to the MCED controller in real time; Based on the droplet morphology fed back by S4, the S4 and MCED controllers adjust the pressure through the pressurizing component to achieve the control of the droplet morphology at the probe tip; The MCED controller adjusts the spatial height of the glass microprobe based on the spatial position of the S4 feedback to complete the preparation of the micro-sugar-shaped symmetrical antenna structure on the substrate.

2. The electrochemical deposition preparation method of the micro-sugar gourd-shaped symmetrical antenna structure according to claim 1, characterized in that: In S1, the association characteristic is: When positive pressure is applied to the inside of the glass microprobe, the droplet bridge morphology at the probe tip expands and becomes larger; When negative pressure is applied to the inside of the glass microprobe, the droplet bridge morphology at the probe tip shrinks.

3. The electrochemical deposition preparation method of the micro-sugar gourd-shaped symmetrical antenna structure according to claim 1, characterized in that: In S2, the pressurizing component is configured to include: A syringe connected to the patch clamp inside the glass microprobe via a flexible tube; A push plate disposed spatially opposite to the push rod on the syringe; A telescopic mechanism connected to the push plate through a mounting seat; Wherein, the push plate is provided with a pressure sensor at the position in contact with the push rod, and the syringe is connected with the inside of the glass microprobe through a hose and a patch clamp to form a sealed environment.

4. The electrochemical deposition preparation method of the micro-sugar gourd-shaped symmetrical antenna structure according to claim 1, characterized in that: In S4, the regulation of droplet morphology refers to: During the electrochemical deposition process, if the droplet expansion diameter exceeds a given error range, the pressurizing component is controlled to output negative pressure to make the droplet bridge smaller; During the electrochemical deposition process, if the droplet bridge becomes smaller due to the change in the probe position during the pulling process, the pressure component is controlled to output positive pressure to make the droplet bridge larger.

5. The electrochemical deposition preparation method of the micro-sugar gourd-shaped symmetrical antenna structure according to claim 1, characterized in that: In S3, the image processing method for visual detection includes: S30, preprocessing the image data collected by the camera or the webcam; S31, performing an opening operation on the preprocessed image to reduce edge noise; S32, performing contour detection on the image after the open operation processing to obtain contour information corresponding to the tip of the glass microprobe, the shape of the droplet bridge, and the shape of the sediment, and feeding it back to the MCED controller; S33, the MCED controller compares each value in the received droplet bridge profile information with the pre-stored droplet bridge standard comparison sample, and if it is greater than the profile of the droplet bridge standard comparison sample, controls the pressurizing component to apply negative pressure to the liquid surface, otherwise applies positive pressure; The MCED controller calculates the distance between the sediment and the glass probe based on the received sediment profile information. If the distance is less than the threshold, the Z-axis motor is controlled to move upward to pull the glass probe upward; otherwise, the Z-axis motor is controlled to move downward to adjust the spatial position of the mobile probe.

6. The electrochemical deposition preparation method of the micro-sugar gourd-shaped symmetrical antenna structure according to claim 2, characterized in that: The preprocessing includes graying, equalizing and binarizing the image; The opening operation refers to performing corrosion and expansion operations on the image.

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