Ceramic sealing structure of high-current-carrying square-section pin

Abstract

The utility model relates to the technical field of metal packaging shells, and discloses a ceramic sealing structure of a high-current-carrying square cross-section pin, which comprises a metal packaging shell and a square cross-section pin, a metalized frame is arranged on the side surface of the metal packaging shell, pin packaging openings are equidistantly arranged on the metalized frame, and the square cross-section pin is arranged on the metalized frame. And a ceramic insulator is packaged on the square cross section pin. According to the utility model, the ceramic insulator is packaged and installed on the square cross section pin, the ceramic insulator and the square cross section pin are sealed and connected together through the sealing installation inner ring, the anti-oxidation packaging outer ring and the sealing installation inner ring are made of kovar soldering lug materials, the bearing strength is high, and the ceramic insulator has an insulation characteristic, so that the requirements of insulation resistance and dielectric voltage resistance are met; the whole shell is made of metal materials, the packaging strength is good, durability is excellent, the device is provided with the metal packaging shell and the ceramic pin packaging structure, the packaging strength is high, the requirements of insulation resistance and dielectric voltage resistance are met, and assembling and positioning are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of metal packaging shells, in particular to a ceramic sealing structure of a high-current-carrying square-section pin. Background Art

[0002] With the rapid development of microelectronics and electrical engineering, electronic device packaging has become a key technology. With the growing demand for high power, high voltage, and high frequency in power electronics systems, the performance requirements for electronic device packaging structures, particularly pin packaging structures, are also becoming increasingly stringent. Traditional pin packaging structures are gradually failing to meet the demands of modern power electronics systems in terms of current carrying capacity, heat dissipation performance, and high voltage resistance. Therefore, the development of a new, high-performance pin packaging structure is particularly important.

[0003] The existing high-current plastic-encapsulated power device protection structure uses plastic packaging, which has lower mechanical properties, sealing performance, environmental adaptability and service life than metal packaging shells, limiting the application areas of power devices. However, in actual use, the metal packaging shell cannot perform good insulation packaging, and it cannot meet the requirements of insulation resistance and dielectric withstand voltage. In addition, the overall packaging convenience is insufficient, and the packaging sealing and stability are poor. Therefore, we propose a ceramic sealing structure with high-current square cross-section pins to solve the above problems. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a ceramic sealing structure with high current-carrying square cross-section pins, which has a metal packaging shell and a ceramic pin packaging structure. The packaging strength is high, which meets the requirements of insulation resistance and dielectric withstand voltage, and is convenient for assembly and positioning. It solves the problem of relatively insufficient strength of existing plastic packaging and insufficient insulation resistance and dielectric withstand voltage strength of metal packaging.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned metal packaging shell and ceramic pin packaging structure, the packaging strength is high, the requirements of insulation resistance and dielectric withstand voltage are met, and the assembly and positioning are convenient, the utility model provides the following technical solutions: a ceramic sealing structure of a high current-carrying square cross-section pin, comprising a metal packaging shell and a square cross-section pin, wherein the side of the metal packaging shell is provided with a metalized frame;

[0008] The metal frame is provided with pin packaging openings at equal intervals, the square cross-section pins are packaged with ceramic insulators, the ceramic insulators are plugged and installed inside the pin packaging openings, the edges of the ceramic insulators are provided with anti-oxidation packaging outer rings, and the edges of the metal frame are provided with anti-oxidation bearing frames.

[0009] The square cross-section pins are fixed to the metallized frame by ceramic insulators, the ceramic insulators are installed to the metallized frame by the anti-oxidation package outer ring, and the metallized frame is installed on the metal package shell by the anti-oxidation bearing frame package.

[0010] Preferably, a sealing inner ring is encapsulated on the inner side of the ceramic insulator, and the square-section pins are fixed to the inner side of the ceramic insulator by the sealing inner ring.

[0011] Preferably, the connection of the square-section pin is square-shaped, and the inner side of the sealing mounting inner ring and the inner side of the ceramic insulator both match and correspond to the square connection end of the square-section pin.

[0012] Preferably, the metallized frame is mounted on the metal packaging shell by brazing technology, the ceramic insulator is mounted on the metallized frame by brazing technology, and the square-section pin is mounted on the ceramic insulator by brazing technology.

[0013] Preferably, the size tolerance of the square connection section of the square-section pin and the size of the internal connection hole of the ceramic insulator is no more than 0.1mm, the size tolerance of the outer ring of the ceramic insulator and the aperture size of the pin packaging port is no more than 0.1mm, and the thickness of the metallized frame is between 0.35-0.7mm.

[0014] Preferably, the ceramic insulator includes a packaging ring and a carrying ring, the outer ring of the packaging ring is engaged with the pin packaging opening, the carrying ring is engaged with the outer side of the pin packaging opening, and the opposite sides of the packaging ring and the carrying ring are connected to each other as a whole.

[0015] Preferably, the anti-oxidation packaging outer ring and the sealing installation inner ring are both made of metalized materials, and the anti-oxidation packaging outer ring and the sealing installation inner ring are both anti-oxidation protection components.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a ceramic sealing structure for high current-carrying square cross-section pins, which has the following beneficial effects:

[0018] 1. The ceramic sealing structure of the high-current-carrying square-section pin is convenient for disassembly and installation by providing a metallized frame on the metal packaging shell. A ceramic insulator is packaged and installed on the square-section pin, and the two are sealed together by a sealing inner ring. The ceramic insulator is packaged at the pin packaging port by an anti-oxidation packaging outer ring. The anti-oxidation packaging outer ring seal and the sealing inner ring are made of Kovar welding sheet material with high bearing strength. The ceramic insulator has insulating properties and meets the requirements of insulation resistance and dielectric withstand voltage. The overall shell is made of metal, with good packaging strength and excellent durability. The device has a metal packaging shell and a ceramic pin packaging structure with high packaging strength, which meets the requirements of insulation resistance and dielectric withstand voltage and is also convenient for assembly and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a frontal perspective schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a top perspective schematic diagram of the structure of the utility model;

[0021] Figure 3 This is a schematic diagram of a front view cross-section of the structure of the utility model;

[0022] Figure 4 For the utility model structure Figure 3 A in the middle is an enlarged schematic diagram;

[0023] Figure 5 This is a top-view cross-sectional perspective diagram of the structure of the utility model;

[0024] Figure 6 It is a rear perspective schematic diagram of the structure of the utility model.

[0025] In the figure: 1. Metal packaging shell; 2. Square cross-section pins; 3. Metallized frame; 4. Pin packaging port; 5. Ceramic insulator; 51. Packaging ring; 52. Carrying ring; 6. Anti-oxidation packaging outer ring; 7. Anti-oxidation carrying frame; 8. Sealing installation inner ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1-6A ceramic sealing structure for a high current carrying square cross-section pin comprises a metal package shell 1 and a square cross-section pin 2, wherein a metalized frame 3 is provided on the side of the metal package shell 1;

[0028] The metal frame 3 has pin packaging openings 4 at equal intervals. The square cross-section pins 2 are packaged with ceramic insulators 5. The ceramic insulators 5 are plugged and installed inside the pin packaging openings 4. The edge of the ceramic insulator 5 is provided with an anti-oxidation packaging outer ring 6. The edge of the metal frame 3 is installed with an anti-oxidation bearing frame 7.

[0029] The square-section pin 2 is fixed to the metalized frame 3 by a ceramic insulator 5, the ceramic insulator 5 is mounted to the metalized frame 3 by an anti-oxidation packaging outer ring 6, and the metalized frame 3 is encapsulated and mounted on the metal packaging shell 1 by an anti-oxidation carrying frame 7;

[0030] The beneficial effects to be expressed by this solution are: by providing a metallized frame 3 on the metal packaging shell 1, it can be conveniently disassembled and installed, and a ceramic insulator 5 is packaged and installed on the square-section pin 2, and the two are sealed together by a sealing installation inner ring 8. The ceramic insulator 5 is packaged at the pin packaging port 4 by an anti-oxidation packaging outer ring 6. The anti-oxidation packaging outer ring 6 and the sealing installation inner ring 8 are made of Kovar welding sheet material with high bearing strength. The ceramic insulator 5 has insulating properties and meets the requirements of insulation resistance and dielectric withstand voltage. The overall shell is made of metal, with good packaging strength and excellent durability, so that the device has a metal packaging shell and a ceramic pin packaging structure with high packaging strength, which meets the requirements of insulation resistance and dielectric withstand voltage, and is also convenient for assembly and positioning.

[0031] Furthermore, a sealed mounting inner ring 8 is encapsulated on the inner side of the ceramic insulator 5, and the square cross-section pin 2 is fixed to the inner side of the ceramic insulator 5 by the sealed mounting inner ring 8;

[0032] By providing the sealing mounting inner ring 8, the ceramic insulator 5 and the square-section pin 2 can be mounted in one body, with stable mounting adaptation, easy assembly and disassembly, and high mounting strength.

[0033] Furthermore, the connection of the square-section pin 2 is square-shaped, and the inner side of the sealing mounting inner ring 8 and the inner side of the ceramic insulator 5 both match and correspond to the square connection end of the square-section pin 2;

[0034] By arranging the square-section pins 2 and the sealing mounting inner ring 8 to match the ceramic insulator 5, the overall mounting and adaptation are stable and the packaging is convenient.

[0035] Furthermore, the metallized frame 3 is mounted on the metal packaging shell 1 by using a brazing technique, the ceramic insulator 5 is mounted on the metallized frame 3 by using a brazing technique, and the square cross-section pin 2 is mounted on the ceramic insulator 5 by using a brazing technique;

[0036] By providing the metallized frame 3, the ceramic insulator 5 and the square-section pin 2, all of which are installed by adopting the brazing technology, the whole is packaged into one body, and the installation adaptability is excellent.

[0037] Furthermore, the size tolerance of the square connection cross-section of the square cross-section pin 2 and the size of the internal connection hole of the ceramic insulator 5 is no more than 0.1 mm, the size tolerance of the outer ring of the ceramic insulator 5 and the aperture size of the pin packaging opening 4 is no more than 0.1 mm, and the thickness of the metallized frame 3 is between 0.35-0.7 mm;

[0038] By setting the tolerance between the square cross-section pin 2 and the ceramic insulator 5 to be small, the tolerance between the ceramic insulator 5 and the pin packaging port 4 to be small, and the thickness of the metallized frame 3 to be between 0.35-0.7mm, the overall tolerance is relatively small, the load-bearing installation is stable, and the adaptation effect is good.

[0039] Furthermore, the ceramic insulator 5 includes a packaging ring 51 and a carrying ring 52. The outer ring of the packaging ring 51 is engaged with the pin packaging opening 4, and the carrying ring 52 is engaged with the outer side of the pin packaging opening 4. The opposite sides of the packaging ring 51 and the carrying ring 52 are connected to each other as a whole.

[0040] By setting the ceramic insulator 5 to include a packaging ring 51 and a carrying ring 52, the packaging ring 51 plays a bearing role, and the carrying ring 52 plays a packaging and sealing role, so that the ceramic insulator 5 can stably carry the square-section pin 2 and can be stably assembled at the pin packaging port 4, with stable bearing and good installation and adaptation effect.

[0041] Furthermore, the anti-oxidation packaging outer ring 6 and the sealing installation inner ring 8 are both made of metalized materials, and the anti-oxidation packaging outer ring 6 and the sealing installation inner ring 8 are both anti-oxidation protection components;

[0042] By arranging the anti-oxidation packaging outer ring 6 and the sealing installation inner ring 8, both are made of anti-oxidation metallized material, which has good durability, excellent corrosion resistance and anti-oxidation effect, and a long service life.

[0043] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0044] Working principle: By providing a metalized frame 3 on the metal packaging shell 1, it can be easily disassembled and installed, which is convenient for early installation and later maintenance operations. The metalized frame 3 is provided with a pin packaging port 4, which can be used for the packaging and installation of square-section pins 2;

[0045] A ceramic insulator 5 is packaged and installed on the square-section pin 2. The square-section pin 2 is made of oxygen-free copper, and the ceramic insulator 5 as an insulating medium is made of Al2O3. The two are sealed together by a sealed inner ring 8. The ceramic insulator 5 is packaged at the pin packaging port 4 by an anti-oxidation packaging outer ring 6. The metallized frame 3 is packaged on the metal packaging shell 1 by an anti-oxidation bearing frame 7. The anti-oxidation packaging outer ring 6 and the sealed inner ring 8 are made of Kovar welding sheet material with high bearing strength. The ceramic insulator 5 has insulating properties, meets the requirements of insulation resistance and dielectric withstand voltage, and is also convenient for assembly and positioning. The anti-oxidation packaging outer ring 6 and the sealed inner ring 8 play a role of wear resistance and load-bearing installation, which is convenient for brazing packaging. The overall shell is made of metal, has good packaging strength, and excellent overall durability. The device has a metal packaging shell and a ceramic pin packaging structure with high packaging strength, meets the requirements of insulation resistance and dielectric withstand voltage, and is also convenient for assembly and positioning, solving the problem of relatively insufficient strength of existing plastic packaging and insufficient insulation resistance and dielectric withstand voltage strength of metal packaging.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceramic sealing structure for a high current carrying square cross-section pin, comprising a metal packaging shell (1) and a square cross-section pin (2), characterized in that: A metalized frame (3) is provided on the side of the metal packaging shell (1); The metallized frame (3) is provided with pin encapsulation openings (4) at equal intervals, the square-section pins (2) are encapsulated with ceramic insulators (5), the ceramic insulators (5) are plugged and installed inside the pin encapsulation openings (4), an anti-oxidation encapsulation outer ring (6) is provided at the edge of the ceramic insulator (5), and an anti-oxidation bearing frame (7) is installed at the edge of the metallized frame (3). The square cross-section pin (2) is fixed to the metalized frame (3) by a ceramic insulator (5), the ceramic insulator (5) is installed to the metalized frame (3) by an anti-oxidation packaging outer ring (6), and the metalized frame (3) is packaged and installed on the metal packaging shell (1) by an anti-oxidation bearing frame (7).

2. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 1, characterized in that: The inner side of the ceramic insulator (5) is encapsulated with a sealed mounting inner ring (8), and the square cross-section pin (2) is fixed to the inner side of the ceramic insulator (5) by the sealed mounting inner ring (8).

3. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 2, characterized in that: The connection of the square-section pin (2) is square-shaped, and the inner side of the sealing mounting inner ring (8) and the ceramic insulator (5) both match and correspond to the square connection end of the square-section pin (2).

4. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 1, characterized in that: The metallized frame (3) is mounted on the metal packaging shell (1) using a brazing technique, the ceramic insulator (5) is mounted on the metallized frame (3) using a brazing technique, and the square-section pin (2) is mounted on the ceramic insulator (5) using a brazing technique.

5. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 1, characterized in that: The size tolerance of the square connection section of the square-section pin (2) and the size of the internal connection hole of the ceramic insulator (5) is no more than 0.1 mm, the size tolerance of the outer ring of the ceramic insulator (5) and the aperture size of the pin packaging opening (4) is no more than 0.1 mm, and the thickness of the metallized frame (3) is between 0.35 and 0.7 mm.

6. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 1, characterized in that: The ceramic insulator (5) comprises a packaging ring (51) and a carrying ring (52); the outer ring of the packaging ring (51) is engaged with the pin packaging opening (4); the carrying ring (52) is engaged with the outer side of the pin packaging opening (4); and the opposite sides of the packaging ring (51) and the carrying ring (52) are connected to each other as a whole.

7. The ceramic sealing structure of a high current carrying square cross-section pin according to claim 2, characterized in that: The anti-oxidation packaging outer ring (6) and the sealing installation inner ring (8) are both made of metalized materials, and the anti-oxidation packaging outer ring (6) and the sealing installation inner ring (8) are both anti-oxidation protection components.

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