JP4297284B2 - High voltage feedthrough capacitor, high voltage feedthrough capacitor manufacturing method, and magnetron - Google Patents

Description

  The present invention relates to a high-voltage feedthrough capacitor, a method for manufacturing a high-voltage feedthrough capacitor, and a magnetron having a filter made of the high-voltage feedthrough capacitor.

  This type of high-voltage feed-through capacitor is a filter that removes unwanted radiation generated during the magnetron oscillation operation, and is incorporated in, for example, a magnetron such as a microwave oven. The general structure is as follows. It is. That is, two through holes are provided at intervals in the dielectric ceramic body constituting the capacitor unit, and the individual electrodes that are independent from each other on both sides of the through holes are opened and common to the individual electrodes. A common electrode is provided. The common electrode is placed on one side of the grounding metal and is fixed by means such as soldering. In the through conductor, the tab terminal portion is electrically connected to the individual electrode through an electrode connector or the like, and the rod-like conductor portion passes through the through hole of the capacitor portion. An insulating tube is attached to the rod-shaped conductor portion.

  Further, in the inside of the through hole of the capacitor portion, the insulating tube is filled with an insulating resin made of a thermosetting resin such as an epoxy resin, thereby ensuring moisture resistance and insulation.

  By the way, the dielectric porcelain element is composed of barium titanate as a main component and is a ferroelectric substance belonging to the piezoelectric crystal group and exhibits an inverse piezoelectric effect. Therefore, an AC high voltage for oscillating the magnetron is applied to the capacitor unit. As a result, the dielectric ceramic body undergoes a phenomenon that it repeatedly expands and contracts when it is applied with a voltage and contracts to return to its original state when no voltage is applied. Such a phenomenon is called an electrostriction phenomenon.

  The expansion and contraction of the dielectric ceramic body due to the electrostriction phenomenon causes mechanical stress on the insulating resin supplied around the insulating tube, and the insulating resin is exposed from the inner peripheral surface of the through hole provided in the dielectric ceramic body. It has been confirmed that it peels off and creates a gap between the insulating resin and the inner peripheral surface of the through hole. Such a gap must be avoided because it causes deterioration of the characteristics of the high-voltage feedthrough capacitor and a defect due to a short circuit between the electrodes.

In order to avoid the above-mentioned problem, as disclosed in Patent Document 1, the conventional high-voltage feedthrough capacitor is insulated by utilizing its elasticity (elasticity) by using a silicone resin for the insulating tube. Reducing mechanical stress applied to the resin. However, according to the configuration in which the insulating tube is made of a silicone resin, it has excellent stretchability, but there is a problem in handling, for example, it takes time to attach to the through conductor. In general, a silicone resin is expensive, resulting in an increase in cost.
Japanese Patent No. 2756416

  An object of the present invention is to provide a high-voltage feedthrough capacitor, a high-voltage feedthrough capacitor manufacturing method, and a magnetron that can improve withstand voltage resistance and heat cycle performance.

  Another object of the present invention is to relieve stress by reducing the amount of insulating resin used, improve reliability, and further reduce the cost. High voltage feedthrough capacitor, method for manufacturing high voltage feedthrough capacitor, And providing a magnetron.

1. High voltage feedthrough capacitor In order to solve the above-described problems, a high voltage feedthrough capacitor according to the present invention includes a capacitor portion, a through conductor, an insulating tube, and an insulating resin. The capacitor part has a through hole penetrating from one surface to the other surface. The through conductor penetrates the through hole. The insulating tube is attached to at least a portion of the penetrating conductor that penetrates the through hole. The insulating resin is mainly composed of a thermosetting resin and is supplied to at least the inside of the through hole.

  The present invention is characterized in that in the general structure of the above-described high-voltage feedthrough capacitor, the arrangement of the insulating resin is devised. Hereinafter, the characteristic points according to the present invention will be described.

  First, the insulating resin is attached in the form of a film at least on the inner peripheral surface of the through hole. According to this configuration, since a gap is generated between the surface of the insulating resin and the outer peripheral surface of the insulating tube, the insulating resin and the insulating tube are not in contact with each other in the portion where the gap is generated. Therefore, even if mechanical stress is applied to the insulating resin due to electrostriction or the like, the stress can be blocked by the air gap, so that the withstand voltage and heat cycle performance of the high voltage feedthrough capacitor are improved. .

  Further, according to the configuration in which the insulating resin is attached to the inner peripheral surface of the through hole in a film shape, the amount of the insulating resin used can be reduced. Therefore, stress can be relieved by reducing the amount of insulating resin used, and the reliability of the high-voltage feedthrough capacitor can be improved. Furthermore, since the amount of insulating resin used is reduced, the manufacturing cost can be reduced.

  As described above, since the stress applied to the insulating resin is blocked by the gap, it is not necessary to use a silicone resin for the insulating tube, and a thermosetting resin or a thermoplastic resin can be used. Specifically, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or a material mainly composed of at least one selected from epoxy resins can be used. For this reason, manufacturing cost can be reduced.

2. Method for Manufacturing High Voltage Feedthrough Capacitor The method for manufacturing a high voltage feedthrough capacitor according to the present invention manufactures a high voltage feedthrough capacitor assembly (hereinafter simply referred to as an assembly) by combining a capacitor portion and a through conductor. Then, this assembly is preheated, an insulating tube is attached to the through conductor of the preheated assembly, and then a powdered insulating resin is supplied to the through hole of the capacitor portion, and a film-like is formed on the inner peripheral surface of the through hole. A step of attaching to the substrate.

  As described above, in the method for manufacturing a high-voltage through-type capacitor according to the present invention, the assembly in which the capacitor portion and the through conductor are combined is preheated, and the insulating tube is attached to the through conductor of the preheated assembly. Because it passes through the process of supplying the insulating resin in the form of powder to the through-hole of the capacitor part, it is closer to the inner peripheral surface of the through-hole in the high temperature state by preheating than the surface of the insulating tube in the low temperature state without being preheated. Insulating resin adheres preferentially. Thereafter, by performing the main curing process, the insulating resin melts and adheres to the inner peripheral surface of the through hole in the form of a film.

  Moreover, since the insulating resin is in the form of powder, it is easy to handle. Therefore, it is possible to appropriately adjust the supply amount of the insulating resin to the through hole and attach it to the inner peripheral surface of the through hole in the form of a film. In addition, since the powdered insulating resin is generally inexpensive, the manufacturing cost can be reduced.

3. Magnetron A magnetron according to the present invention includes the high-voltage feedthrough capacitor described above. Therefore, it has all the advantages of the high voltage feedthrough capacitor described above.

  Furthermore, the high voltage feedthrough capacitor according to the present invention has the general structure of this type of high voltage feedthrough capacitor. Therefore, when used in a magnetron of a microwave oven, a through conductor is used as a power supply terminal, and a high voltage feed-through capacitor is connected between this through terminal and a grounding bracket that is at a ground potential, so that noise passing through the through conductor is high voltage. It can be blocked by the filter action of the feedthrough capacitor.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

As described above, according to the present invention, the following effects can be obtained.
(1) It is possible to provide a high-voltage feedthrough capacitor, a method for manufacturing a high-voltage feedthrough capacitor, and a magnetron that can improve dielectric strength and heat cycle performance.
(2) Another object of the present invention is to reduce the supply amount of the insulating resin, relieve stress and improve the reliability accompanying the reduction in supply amount, and further reduce the cost. A method for manufacturing a voltage feedthrough capacitor and a magnetron can be provided.

  1 is a perspective view showing an assembly structure of a high-voltage feedthrough capacitor according to an embodiment of the present invention, FIG. 2 is a side sectional view of the high-voltage feedthrough capacitor according to an embodiment of the present invention, and FIG. It is front sectional drawing of the high voltage feedthrough type capacitor shown in FIG. FIG. 4 is an enlarged view of a region a circled by a one-dot chain line in FIG.

  Referring to FIGS. 1 to 4, a high-voltage feedthrough capacitor according to an embodiment of the present invention is used as a filter that removes unnecessary radiation generated during the oscillation operation of a magnetron, for example, in a magnetron such as a microwave oven. And includes an insulating case 1, through conductors 2 and 3, electrode connectors 4 and 5, a capacitor portion 6, a grounding fitting 7, insulating tubes 8 and 9, and insulating resins 11 and 12. .

  The ground metal fitting 7 is made of a conductive metal material such as iron, copper, and brass, and has a floating portion 71, a concave portion 72, and a through hole 73. The floating portion 71 rises on one side of the grounding metal 7. The recess 72 is provided at a position corresponding to the raised portion 71 on the other surface side of the grounding metal 7. The through hole 73 is provided in the surface of the floating portion 71.

  The insulating case 1 is preferably made of PET or PBT, is provided on one surface side of the grounding fitting 7, and one end is inserted into the outer periphery of the floating portion 71.

  Capacitor unit 6 includes a dielectric ceramic body 60, two through holes 61 and 62, two individual electrodes 63 and 64, a common electrode 65, and a recess 66.

The dielectric ceramic element body 60 can have a composition containing, for example, BaTiO ₃ —BaZrO ₃ —CaTiO ₃ as a main component and one or more kinds of additives. The dielectric ceramic body 60 preferably has a moderate R (roundness) as a whole in order to avoid concentration of mechanical stress and electrical stress.

  The through holes 61 and 62 are provided in the dielectric ceramic body 60 and penetrate the dielectric ceramic body 60 from one surface to the other surface.

  The individual electrodes 63 and 64 and the common electrode 65 are preferably composed mainly of Ag and contain Fe, Co, Ni, or a combination thereof as a magnetic material. Each of the individual electrodes 63 and 64 is provided on one surface side of the dielectric ceramic body 11 so as to surround a region where the through holes 61 and 62 are opened. The individual electrodes 63 and 64 are separated by a recess 66. Although not shown, a convex portion may be used instead of the concave portion 66. Since the recess 66 is for increasing the creepage distance between the individual electrodes 63 and 64, the width and depth thereof are selected so that a necessary creepage distance can be secured. The common electrode 65 is provided on the other surface side of the dielectric ceramic body 11.

  The capacitor portion 6 is mounted on the floating portion 71 on one surface of the grounding metal 7, and the common electrode 65 is electrically formed on the surface of the floating portion 71 by means of, for example, soldering, It is fixed mechanically.

  The through conductor 2 is made of a conductive metal material such as iron, copper, and brass, and includes a tab terminal portion 21 used as a tab connector and a rod-like conductor portion 22 that penetrates the through hole 61. The rod-shaped conductor portion 22 is covered with the insulating tube 8 at least at a portion that penetrates the through hole 61. Tab terminal portion 21 and rod-shaped conductor portion 22 are connected by caulking 23.

  The through conductor 2 has a rod-shaped conductor portion 22 that passes through the electrode connector 4 and the through hole 73, and a base portion of the tab terminal portion 21 is fixed to the electrode connector 4 by means such as soldering. 4 is electrically and mechanically connected to the individual electrode 63.

  The through conductor 3 is also made of a conductive metal material such as iron, copper, and brass, and includes a tab terminal portion 31 used as a tab connector and a rod-like conductor portion 32 that penetrates the through hole 62. The rod-shaped conductor portion 32 is covered with the insulating tube 9 at least at a portion that penetrates the through hole 62. The rod-shaped conductor portion 32 and the tab terminal portion 31 are connected by caulking 33.

  The through conductor 3 has a rod-shaped conductor portion 32 that penetrates the electrode connector 5 and the through hole 73, and a base portion of the tab terminal portion 31 is fixed to the electrode connector 5 by means such as soldering. 5 is electrically and mechanically connected to the individual electrode 64.

  The insulating resin 11 is supplied around the capacitor unit 6 and is in close contact with the surface of the dielectric ceramic body 60. Specifically, the insulating resin 11 is mainly composed of a thermosetting resin such as an epoxy resin, and is filled inside the insulating case 1 from one surface of the ground metal fitting 7 to a position covering the caulkings 23 and 33. Yes.

  The insulating resin 12 is mainly composed of a thermosetting resin such as an epoxy resin, and is supplied from the inside of the through holes 61 and 62 to the internal space leading to the recess 72 and is in close contact with the surface of the dielectric ceramic body 60. . Further, one end of the insulating tubes 8 and 9 is embedded in the insulating resin 12.

  The structure described above is generally known in this type of high-voltage feedthrough capacitor. When used in a magnetron for a microwave oven, the through conductors 2 and 3 are used as power supply terminals, and a capacitor portion 6 is connected between the through conductors 2 and 3 and a grounding metal fitting 7 that is at ground potential. Thus, a high-voltage feedthrough capacitor that cuts off the noise passing through the capacitor portion 6 by the filter action of the capacitor portion 6 is obtained.

  Since the ground metal fitting 7 has a through hole 73 and the capacitor unit 6 has through holes 61 and 62, the through conductors 2 and 3 having a high potential with respect to the ground, and the ground metal fitting having a ground potential. 7 and the common electrode 65 can ensure sufficient electrical insulation by the through holes 61 and 62.

  Since the insulating resin 11 and 12 are supplied around the capacitor unit 6, reliability tests such as a high temperature load test and a humidity resistance load test, or when used in a high temperature and high humidity environment are improved. To do.

  Since the insulating tubes 8 and 9 are mounted so as to cover a part of the rod-shaped conductor portions 22 and 32, the grounding fitting 7 is limited in terms of the mounting mode of the insulating tubes 8 and 9 and the quantitative limit corresponding to the thickness. And the withstand voltage between the through conductors 2 and 3 can be secured.

  Further, since the insulating tubes 8 and 9 are attached to the rod-shaped conductor portions 22 and 32, it is not necessary to fix the insulating tubes 8 and 9 to the grounding metal 7. Accordingly, it is possible to reduce the size of the high-voltage feedthrough capacitor, reduce the supply amount of the insulating resin 12, and reduce the cost.

  The high-voltage feedthrough capacitor according to an embodiment of the present invention is further devised with respect to the arrangement of the insulating resin 12 and the configuration of the insulation tubes 8 and 9 in the basic structure of the above-described high-voltage feedthrough capacitor. There is a feature in the point. This feature point will be further described in detail with reference to FIG.

  Referring to FIG. 4, the insulating resin 12 is preferably configured by attaching an epoxy resin powder to the inner peripheral surfaces 610 and 620 of the through holes 61 and 62 in a film shape. The film thickness of the insulating resin 12 is about 0.2 mm. Further, inside the through holes 61 and 62, there is a gap 13 between the surface of the insulating resin 12 and the outer peripheral surfaces of the insulating tubes 8 and 9.

  The insulating tube 8 is mainly composed of a thermosetting resin or a thermoplastic resin, and is preferably at least one selected from PBT, PET, or an epoxy resin. It is attached in close contact so as to cover the part located inside.

  Similarly, the insulating tube 9 is mainly composed of a thermosetting resin or a thermoplastic resin, and is preferably at least one selected from PBT, PET, or an epoxy resin. It is attached in close contact so as to cover a portion located inside 62.

  The configuration described with reference to FIG. 4 is for solving the conventional problems described below. That is, when this type of high-voltage feedthrough capacitor is used as a filter in a magnetron such as a microwave oven, when an AC high voltage that oscillates the magnetron is applied to the capacitor unit 6, Electrostriction occurs when the voltage is applied and when the voltage is not applied, the electrostriction is caused to shrink in order to return to the original state.

  Assuming the prior art in which the gap 13 is filled with the insulating resin 12, the expansion and contraction of the dielectric ceramic body 60 due to the electrostriction phenomenon is caused in the through holes 61 and 62 as already described in the background art section. In addition, mechanical stress is applied to the insulating resin 12 supplied around the insulating tubes 8 and 9, and the insulating resin 12 peels from the inner peripheral surfaces 610 and 620, and the peeling surface of the insulating resin 12 and the through holes 61 and 62 A gap is generated between the inner peripheral surfaces 610 and 620. Such a gap must be avoided because it causes deterioration of the characteristics of the high-voltage feedthrough capacitor and a defect due to a short circuit between the electrodes. Therefore, conventionally, in order to relieve stress applied to the insulating resin 12, a silicone resin having excellent stretchability has been used for the insulating tubes 8 and 9. However, according to the configuration in which the insulating tubes 8 and 9 are made of a silicone resin, the insulating tubes 8 and 9 are excellent in stretchability, but there is a problem in handling, for example, it takes time to attach to the through conductors 2 and 3. In general, the silicone resin is expensive, which increases the cost.

  On the other hand, in the high voltage feedthrough capacitor according to the embodiment of the present invention, the insulating resin 12 is attached to the inner peripheral surfaces 610 and 620 in a film shape. According to this configuration, a gap 13 is formed between the surface of the insulating resin 12 and the outer peripheral surface of the insulating tubes 8 and 9 inside the through holes 61 and 62, and the insulating resin is formed in a portion where the gap 13 is generated. 12 and the insulating tubes 8 and 9 are in a non-contact state. Therefore, even if stress occurs in the insulating resin 12, the stress can be blocked by the gap 13, so that the withstand voltage and heat cycle performance of the high voltage feedthrough capacitor are improved.

  Further, according to the configuration in which the insulating resin 12 is attached to the inner peripheral surfaces 610 and 620 as a film, the amount of the insulating resin 12 used can be reduced. Therefore, the stress can be relieved by reducing the amount of the insulating resin 12 used, and the reliability of the high-voltage feedthrough capacitor can be improved. Furthermore, since the usage amount of the insulating resin 12 is reduced, the manufacturing cost can be reduced.

  As described above, since the stress applied to the insulating resin 12 is blocked by the gap 13, it is not necessary to use a silicone resin for the insulating tubes 8 and 9. For this reason, manufacturing cost can be reduced.

  5 to 8 are views showing a method for manufacturing a high-voltage feedthrough capacitor according to an embodiment of the present invention. 5 to 8, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals.

  First, referring to FIG. 5, an assembly is manufactured by combining the insulating case 1, the through conductors 2 and 3, the electrode connecting bodies 4 and 5, the capacitor portion 6, the grounding fitting 7 and the insulating resin 11. Preheat this assembly.

  This preheating step is preferably performed in a preheating furnace. In the preheating process according to one embodiment of the present invention, the assembly is preheated at a heating temperature of 140 ° C. for 30 minutes. The heating temperature is usually set in the range of 70 to 150 ° C, and preferably in the range of 90 to 140 ° C.

  Next, referring to FIG. 6, after the process shown in FIG. 5, the insulating tubes 8 and 9 are attached to the through conductors 2 and 3 of the preheated assembly. One end of each of the insulating tubes 8 and 9 is guided into the through holes 61 and 62 of the capacitor unit 6. Since the insulating tubes 8 and 9 are made of a thermosetting resin such as an epoxy resin instead of the conventional silicone resin, they can be easily attached. Thereafter, the powdery insulating resin 12 is supplied to the assembly from the other surface side of the grounding metal 7 into the through holes 61 and 62 of the capacitor unit 6.

  Next, referring to FIG. 7, the powdered insulating resin 12 supplied by the process shown in FIG. 6 is in a higher temperature state by preheating than the surfaces of the insulating tubes 8 and 9 in a low temperature state without being preheated. Are preferentially attached to the surfaces of the electrode connecting bodies 4 and 5, the capacitor portion 6, and the grounding fitting 7.

  In particular, in the through holes 61 and 62 of the capacitor unit 6, the insulating resin 12 is not preheated and the inner peripheral surfaces 610 and 620 are in a high temperature state by preheating rather than the surfaces of the insulating tubes 8 and 9 in a low temperature state. The air gap 13 appears between the surface of the insulating resin 12 and the outer peripheral surfaces of the insulating tubes 8 and 9.

  After the process shown in FIG. 7, the assembly undergoes a main curing process, whereby the powdered insulating resin 12 is melted. In the main curing process, the assembly is heated in an induction furnace at a heating temperature of 150 ° C. for 90 minutes. The insulating resin 12 melted in the main curing step covers the vicinity of the through hole 73 of the grounding metal 7, adheres to the inner peripheral surfaces 610 and 620 of the through holes 61 and 62, and is cured (see FIG. 8). ). The main curing step can be performed by a preheating furnace as in the preheating step.

  According to the manufacturing method described with reference to FIGS. 5 to 8, a high-voltage feedthrough capacitor having all the advantages described with reference to FIGS. 1 to 4 can be manufactured.

  The high-voltage feedthrough capacitor according to the present invention described with reference to FIGS. 1 to 8 constitutes a magnetron such as a microwave oven in combination with a cathode stem, an inductor, and the like. Next, a magnetron using a high voltage feedthrough capacitor according to an embodiment of the present invention will be described. FIG. 9 is a partially broken sectional view of a magnetron for a microwave oven according to an embodiment of the present invention, and FIG. 10 is an electric circuit diagram of the magnetron shown in FIG. 9 and 10, the same reference numerals are given to the same components as those shown in FIGS. 1 to 8.

  Referring to FIGS. 9 and 10, the magnetron for a microwave oven according to one embodiment of the present invention includes a cathode stem 21, a filter box 92, an inductor 93, a cooling fin 94, a gasket 95, and an RF output end 96. And a magnet 97 and an oscillator 98, in which the high-voltage feedthrough capacitor 100 described with reference to FIGS. 1 to 8 is incorporated. GND is a ground electrode.

  Specifically, the filter box 92 is disposed so as to cover the cathode stem 21. The high-voltage feedthrough capacitor 100 is provided through the through holes provided in the side plate 921 of the filter box 92 so that the through conductors 2 and 3 are exposed to the outside. It is fixedly attached to the side plate 921. The inductor 93 is connected in series between the cathode terminal of the cathode stem 21 and the through conductors 2 and 3 of the high voltage feedthrough capacitor 100 inside the filter box 92.

In order to oscillate the magnetron shown in FIGS. 9 and 10, a voltage of about 4 kV _0-P having a commercial frequency or a frequency of 20 kHz to 40 kHz is supplied to the through conductors 2 and 3 of the high voltage feedthrough capacitor 100. . The supplied high voltage is supplied from the through conductors 2 and 3 to the magnetron through the inductor 93, and the magnetron oscillates. At this time, as described above, an unnecessary radiation wave that becomes noise is generated. Noise passing through the through conductors 2 and 3 is blocked by the filter function of the capacitor unit 6 and the inductor 93.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

1 is a perspective view showing an assembly structure of a high-voltage feedthrough capacitor according to an embodiment of the present invention. It is side surface sectional drawing of the high voltage feedthrough type capacitor which concerns on one Embodiment of this invention. FIG. 3 is a front sectional view of the high voltage feedthrough capacitor shown in FIG. 2. It is a figure which expands and shows a part of high voltage feedthrough type capacitor shown in FIG. It is a figure which shows the manufacturing method of the high voltage feedthrough type capacitor which concerns on one Embodiment of this invention. FIG. 6 is a diagram showing a step after the step shown in FIG. 5. It is a figure which expands and shows the process after the process shown in FIG. It is a figure which shows the process after the process shown in FIG. It is a partial fracture sectional view of the magnetron concerning one embodiment of the present invention. FIG. 10 is an electric circuit diagram of the magnetron shown in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 High voltage through-type capacitor 2, 3 Through-conductor 6 Capacitor part 61, 62 Through-hole 610, 620 Through-hole inner peripheral surface 8, 9 Insulating tube 11, 12 Insulating resin 13 Space

Claims (4)

A method of manufacturing a high-voltage feedthrough capacitor,
The high-voltage feedthrough capacitor includes a capacitor portion, a through conductor, an insulating tube, and an insulating resin.
The capacitor portion has a through hole penetrating from one surface to the other surface,
The through conductor passes through the through hole,
The insulating tube is mainly composed of a thermosetting resin or a thermoplastic resin, and at least the through conductor is attached to a portion that penetrates the through hole,
The insulating resin is mainly composed of a thermosetting resin, and is attached to the inner peripheral surface of at least the through-hole in a film shape ,
The manufacturing method manufactures a high voltage feedthrough capacitor assembly by combining the capacitor portion and the through conductor,
Preheat the high voltage feedthrough capacitor assembly;
The insulating tube is attached to the through conductor of the preheated high voltage feedthrough capacitor assembly,
Supplying the powdered insulating resin to the through hole of the capacitor unit, and attaching it to the inner peripheral surface of the through hole in a film form;
A method for manufacturing a high-voltage feedthrough capacitor including a process. A method of manufacturing a high-voltage feedthrough capacitor according to claim 1,
The high-voltage feedthrough capacitor has a gap between at least the surface of the insulating resin and the outer peripheral surface of the insulating tube.
Production method. A method for manufacturing a high-voltage feedthrough capacitor according to claim 1 or 2,
The insulating tube is made of at least one selected from polyethylene terephthalate, polybutylene terephthalate, or epoxy resin.
Production method. A method for manufacturing a high-voltage feedthrough capacitor according to any one of claims 1 to 3,
The insulating resin is configured by adhering epoxy resin powder.
Production method.

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