A modified device of polyimide inlaid with a conductive ring

Abstract

The utility model relates to a kind of modification device of polyimide inlaying conductive ring comprising vacuum tank and modification unit, modification unit is set in vacuum tank;Modification unit includes bottom plate, top cover, plug post and external electrode, and the cavity is formed between bottom plate, top cover and external electrode, and the cavity is used to receive polyimide inlaying conductive ring;Plug post lower end is fixed on bottom plate, and plug post is coaxially arranged with external electrode;Modification, receive polyimide inlaying conductive ring sleeve on the plug post, and the electrode ring of external electrode is coaxial with the conductive ring on polyimide and staggered arrangement;Polyimide inlaying conductive ring is sleeved on plug post, vacuum tank is evacuated, so that modification unit is in vacuum state;Between external electrode and the conductive ring of polyimide, form oblique electric field, and ionize the rarefied gas in cavity by electric field, and the rarefied gas after ionization is modified to polyimide between conductive ring.

Description

Technical Field

[0001] This invention belongs to the field of technology for modifying conductive rings with attached polyimide films, specifically relating to a device for modifying polyimide with embedded conductive rings. Background Technology

[0002] With the rapid development of my country's space program, more and more spacecraft are being sent into space. While in space, spacecraft surfaces are exposed to radiation from ions, electrons, or plasma. When electrons with energies exceeding tens of kiloelectron volts act on the surface of spacecraft materials, they easily penetrate the surface and deposit inside the material. Over time, different parts of the material will develop potential differences due to variations in electrical potential, accompanied by the formation of an electric field. When the electric field strength exceeds the breakdown threshold, a discharge phenomenon occurs, causing malfunctions such as abnormal spacecraft operation.

[0003] The solar panel drive unit, abbreviated as "SADA," is the power source for spacecraft. Inside the SADA is an assembly of conductive rings embedded in polyimide. To improve the stability of the conductive ring assembly, the polyimide between the conductive rings needs to be modified. To achieve this modification, a device for modifying polyimide with embedded conductive rings needs to be developed. Utility Model Content

[0004] To modify the polyimide between conductive rings and improve the stability of the conductive ring assembly, this invention provides a device for modifying polyimide with embedded conductive rings. To achieve the above objective, the specific technical solution adopted by this invention is as follows: A modification device for polyimide embedded with conductive rings includes a vacuum chamber and a modification unit, wherein the modification unit is disposed inside the vacuum chamber; the modification unit includes a base plate, a top cover, a post, and an external electrode, wherein the base plate, the top cover, and the external electrode enclose a cavity for receiving the polyimide embedded with conductive rings; the lower end of the post is fixed to the base plate, and the post is coaxially arranged with the external electrode; during modification, the polyimide containing the embedded conductive rings is fitted onto the post, and the conductive rings on the polyimide are coaxially and staggered with the electrode rings of the external electrode.

[0005] In a further improvement, the external electrode includes a cylindrical insulating tube and several electrode rings, the electrode rings being fixed on the inner wall of the cylindrical insulating tube; the electrode rings are coaxially arranged with the cylindrical insulating tube and are evenly spaced along the axis of the cylindrical insulating tube.

[0006] In a further improvement, the diameter of the cylindrical insulating tube is adapted to the diameter of the polyimide embedded with the conductive ring. During modification, the gap between the inner surface of the electrode ring and the side surface of the polyimide embedded with the conductive ring is controlled to be 1mm~15mm.

[0007] In a further improvement, the electrode rings are fixed to the inner wall of the cylindrical insulating tube by screws; the electrode rings are connected to the power supply by wires.

[0008] In a further improvement, the lower end of the cylindrical insulating tube is inserted and fixed to the upper end of the base plate, and an annular groove is provided on the top cover for the upper ends of the cylindrical insulating tube and the insertion post to be inserted respectively, and a sealing ring is provided in the annular groove.

[0009] As a further improvement, an injection hole is provided on the top cover for injecting carbon tetrafluoride gas into the chamber.

[0010] In a further improvement, the vacuum tank includes a tank body and a tank door, the tank door being fastened to the tank body, and a perforation for a gas supply pipe or wire to pass through is provided on the tank door, with a sealing rubber ring installed inside the perforation.

[0011] The beneficial effects of this invention are as follows: A polyimide sleeve with embedded conductive rings is mounted on the insertion post, and the vacuum chamber is evacuated to place the modification unit in a vacuum state. An inclined electric field is formed between the external electrode and the conductive rings of the polyimide. The electric field ionizes the rarefied gas in the chamber, and the ionized rarefied gas modifies the polyimide between the conductive rings. The modified polyimide between the conductive rings undergoes a modification treatment. From a surface morphology perspective, the roughness of the modified polyimide is increased, thus having a certain adhesion and collection effect on the generated wear debris. On the other hand, the dielectric constant and secondary electron emission coefficient of the modified polyimide are reduced, and the breakdown voltage is increased, suppressing the possibility of internal discharge. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the modification device for polyimide with embedded conductive rings according to this utility model. Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional view of the modification unit of the modification device for polyimide with embedded conductive rings according to this utility model. Figure 4 This is a cross-sectional view of polyimide with embedded conductive rings.

[0013] Numbering in the diagram: 1-Vacuum tank, 11-Tank body, 12-Tank door, 13-Perforation, 14-Sealing rubber ring, 2-Modified unit, 21-Base plate, 22-Top cover, 23-Insertion post, 24-External electrode, 241-Cylindrical insulating tube, 242-Electrode ring, 25-Cavity, 26-Sealing ring, 27-Gas injection hole, 3-Polyimide, 4-Conductive ring. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: The specific structure of the modification device for polyimide with embedded conductive rings according to this invention is as follows: Figure 1 and Figure 4 As shown, it includes a vacuum tank 1 and a modification unit 2, with the modification unit 2 fixed inside the vacuum tank 1.

[0015] The structure of modified unit 2 is as follows Figure 2 As shown, it includes a base plate 21, a top cover 22, a post 23, and an external electrode 24. The base plate 21, the top cover 22, and the external electrode 24 enclose a cavity 25, which is used to house the polyimide 3 embedded with the conductive ring 4.

[0016] In this embodiment, as Figure 2 and Figure 3 As shown, the external electrode 24 includes a cylindrical insulating tube 241 and several electrode rings 242, the number of which matches the number of conductive rings 4 on the polyimide 3. The electrode rings 242 are fixed to the inner wall of the cylindrical insulating tube 241; the electrode rings 242 are coaxially arranged with the cylindrical insulating tube 241 and evenly spaced along the axis of the cylindrical insulating tube 241. The fixed connection between the electrode rings 242 and the cylindrical insulating tube 241 is specifically a screw connection; screws are used to fix the electrode rings 242 to the inner surface of the cylindrical insulating tube 241. Screw connections offer the advantages of simple installation and secure fixing. In other embodiments, an annular groove can be formed on the inner wall of the cylindrical insulating tube, and the electrode rings can be embedded in the annular groove.

[0017] like Figure 2 As shown, several electrode rings 242 are connected by wires and to an external power supply. When the external power supply supplies power to the electrode rings 242, a potential difference is generated between the electrode rings 242 and the conductive rings 4, forming an electric field. The electrode rings 242 and the conductive rings 4 are staggered, resulting in an inclined electric field direction. The electric field ionizes the rarefied gas in the chamber 25, and the ionized rarefied gas modifies the polyimide 3 between the conductive rings 4. In other examples, the conductive rings on the polyimide can be connected to a ground wire via wires.

[0018] like Figure 1As shown, the lower end of the insertion post 23 is fixed to the base plate 21, and the insertion post 23 is coaxially arranged with the external electrode 24. During modification, a polyimide 3 containing an embedded conductive ring 4 is fitted onto the insertion post 23. The conductive ring 4 on the polyimide 3 is coaxial with and staggered from the electrode ring 242 of the external electrode 24. In this embodiment, the diameter of the cylindrical insulating tube 241 is matched with that of the polyimide 3 containing the conductive ring 4, so that the gap between the side of the electrode ring 242 away from the cylindrical insulating tube 241 and the outer side of the polyimide 3 is controlled at 1mm~15mm. During improvement, the gap between the inner surface of the electrode ring 242 and the side of the polyimide 3 containing the conductive ring 4 is controlled at 1mm~15mm. This allows the rarefied gas to pass through the space between the electrode ring 242 and the polyimide 3, while the electric field formed between the electrode ring 242 and the conductive ring 4 becomes more inclined, increasing the amount of modified polyimide 3. In other embodiments, the electrode ring is kept at a gap greater than 15 mm or in contact with the polyimide.

[0019] In this embodiment, the lower end of the cylindrical insulating tube 241 is inserted and fixed to the upper end of the base plate 21. An annular groove is provided on the top cover 22 for the upper ends of the cylindrical insulating tube 241 and the insert 23 to be inserted, respectively. A sealing ring 26 is provided within the annular groove. When the top cover 22 is closed, the cylindrical insulating tube 241 and the insert 23 are inserted into the sealing ring 26, thereby improving the sealing performance of the chamber 25. In other embodiments, provided that the sealing performance meets the requirements, a sealing ring may not be provided within the annular groove.

[0020] In this embodiment, a gas injection port 27 is provided on the fixed cover for injecting carbon tetrafluoride gas into the chamber 25. The gas injection port 27 is connected to a carbon tetrafluoride gas source via a gas pipe. During modification, the chamber 25 is in a carbon tetrafluoride atmosphere, which is ionized under the action of an electric field, thus improving the polyimide 3. In other examples, the gas injection port is located on the bottom plate instead of the top cover.

[0021] like Figure 1 As shown, in this embodiment, the vacuum tank 1 includes a tank body 11 and a tank door 12. The tank door 12 is fastened onto the tank body 11. A through hole 13 is provided on the tank door 12 for a gas supply pipe or wire to pass through, and a sealing rubber ring 14 is provided inside the through hole 13. The sealing rubber ring 14 inside the through hole 13 improves the sealing performance of the vacuum tank 1.

[0022] In use, the polyimide set 3 with the conductive ring 4 embedded is loaded onto the insert 23. The vacuum tank 1 is evacuated. When the vacuum degree reaches below 20 Pa, carbon tetrafluoride is injected into the chamber 25, and the gas flow rate is maintained at 30 cm³. 3 / min; An electric current is applied to electrode ring 242, creating an inclined electric field between electrode ring 242 and the conductive ring 4 of polyimide 3. This electric field ionizes the rarefied gas in chamber 25, and the ionized rarefied gas modifies the polyimide 3 between the conductive rings 4. The modified polyimide 3 between the conductive rings 4 exhibits improved surface roughness, thus providing some adhesion and collection of the generated wear debris. Furthermore, the modified polyimide 3 has a lower dielectric constant, a lower secondary electron emission coefficient, and a higher breakdown voltage, suppressing the possibility of internal discharge.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A device for modifying polyimide with embedded conductive rings, characterized in that, The device includes a vacuum chamber and a modification unit, wherein the modification unit is disposed inside the vacuum chamber. The modification unit includes a base plate, a top cover, a plug, and an external electrode. The base plate, top cover, and external electrode enclose a cavity for housing polyimide embedded with conductive rings. The lower end of the plug is fixed to the base plate, and the plug is coaxially arranged with the external electrode. During modification, the polyimide containing the embedded conductive rings is fitted onto the plug, and the conductive rings on the polyimide are coaxially and staggered with the electrode rings of the external electrode.

2. The modification device for polyimide with embedded conductive rings according to claim 1, characterized in that, The external electrode includes a cylindrical insulating tube and several electrode rings, the electrode rings being fixed on the inner wall of the cylindrical insulating tube; the electrode rings are coaxially arranged with the cylindrical insulating tube and are evenly spaced along the axis of the cylindrical insulating tube.

3. The modification device for polyimide with embedded conductive rings according to claim 2, characterized in that, The diameter of the cylindrical insulating tube is adapted to the diameter of the polyimide embedded with the conductive ring. During modification, the gap between the inner surface of the electrode ring and the side surface of the polyimide embedded with the conductive ring is controlled at 1mm~15mm.

4. The modification device for polyimide with embedded conductive rings according to claim 2, characterized in that, The electrode rings are fixed to the inner wall of the cylindrical insulating tube by screws; the electrode rings are connected to the power supply by wires.

5. The modification device for polyimide with embedded conductive rings according to claim 3 or 4, characterized in that, The lower end of the cylindrical insulating tube is inserted and fixed to the upper end of the base plate. An annular groove is provided on the top cover for the upper ends of the cylindrical insulating tube and the insertion post to be inserted respectively. A sealing ring is provided in the annular groove.

6. The modification device for polyimide with embedded conductive rings according to claim 3 or 4, characterized in that, An injection port is provided on the top cover for injecting carbon tetrafluoride gas into the chamber.

7. The modification device for polyimide with embedded conductive rings according to claim 1, characterized in that, The vacuum tank includes a tank body and a tank door. The tank door is fastened onto the tank body, and a through hole is provided on the tank door for a gas supply pipe or wire to pass through. A sealing rubber ring is provided inside the through hole.

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