Micro filter based on glass and metal sealing technology

Abstract

The utility model provides a miniature filter based on glass and metal sealing technology, which comprises a shell, a sealing cover, a first contact pin, a second contact pin and a ceramic capacitor, the first contact pin is hermetically connected with one end of the shell through a high-temperature glass powder sintering layer, and the second contact pin is also hermetically connected with the sealing cover through the high-temperature glass powder sintering layer. The sealing cover is installed at the other end of the shell, after the sealing cover is installed, the first contact pin and the second contact pin are connected in an inserted mode, and the ceramic capacitor is installed in the shell and arranged on the first contact pin in a sleeving mode; the first contact pin and the second contact pin are respectively connected with the shell and the sealing cover in a sealing mode through the high-temperature glass powder sintering layer, after the ceramic capacitor is placed in the shell, butt joint of the first contact pin and the second contact pin and sealing of the shell are achieved in a mode of installing the sealing cover, and therefore glass sealing of the two ends of the filter is achieved. The microfilter provided by the utility model has high air tightness and high heat resistance, and is suitable for large-scale popularization and application.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to a micro filter based on glass and metal sealing technology. Background Art

[0002] Micro filters achieve high-performance filtering functions by using materials with high integration and miniaturization characteristics and specific structural designs, and are widely used in communication systems, radio frequency and communication fields, etc.

[0003] The Chinese utility model patent with announcement number CN212910448U, announced on April 6, 2021, discloses a bonding filter. In the invention, the outer shell and the short end are sealed and connected by a high-temperature glass powder sintered layer, and the outer shell and the long end are connected by a resin sealing layer, so that the filter has good airtightness and high temperature resistance. In the above-mentioned public documents, due to the high temperature environment during the production of the glass powder sintered layer, when the filter is produced, only one end of the outer shell and the pin can be sintered at high temperature first, and then the capacitor and other accessories can be installed in the outer shell in turn, and then sealed with resin. However, the resin sealing layer will age during use, and its sealing is not as good as that of the glass powder sintered layer, making it difficult to use in some harsh environments. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the utility model provides a micro filter based on glass and metal sealing technology.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] A micro filter based on glass and metal sealing technology comprises a housing, a cover, a first pin, a second pin and a ceramic capacitor;

[0009] The first pin is sealed and connected to one end of the housing through a high-temperature glass powder sintered layer;

[0010] The second pin is also sealed and connected to the cover through a high-temperature glass powder sintered layer;

[0011] The cover is installed at the other end of the housing, and after the cover is installed, the first pin and the second pin are plugged in;

[0012] The ceramic capacitor is installed in the housing and sleeved on the first pin.

[0013] Preferably, a stepped notch matched with the sealing cover is formed at the end of the shell, and the sealing cover is fixed in the stepped notch by soldering.

[0014] Preferably, a docking groove is provided at the top of the first plug pin, and a protrusion matched with the docking groove is provided at one end of the second plug pin close to the first plug pin.

[0015] Preferably, the shell and the cover are both made of Kovar alloy.

[0016] Preferably, the shell is formed by integrally die-casting a small round tube and a large round tube, and the small round tube portion of the shell is provided with an external thread.

[0017] Preferably, the first pins, the ceramic capacitor and the housing are connected in pairs by soldering.

[0018] (III) Beneficial effects

[0019] The beneficial effect of the utility model is that: by adopting the above technical scheme, the first pin and the second pin are respectively sealed and connected to the shell and the cover through the high-temperature glass powder sintering layer. After the ceramic capacitor is placed inside the shell, the first pin and the second pin are connected and the shell is sealed by installing the cover, thereby realizing glass sealing at both ends of the filter, so that the microfilter provided by the application has high air tightness and high heat resistance, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the exploded structure of a micro filter based on glass and metal sealing technology;

[0021] Figure 2 This is a schematic diagram of the combined structure of a micro filter based on glass and metal sealing technology.

[0022] Description of reference numerals:

[0023] 1. Shell;

[0024] 2. First pin;

[0025] 3. High temperature glass powder sintering layer;

[0026] 4. Ceramic capacitors;

[0027] 5. Capping;

[0028] 6. Second pin. DETAILED DESCRIPTION

[0029] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0030] Please refer to Figure 1 to Figure 2 The utility model provides a micro filter based on glass and metal sealing technology, including a housing 1, a cover 5, a first pin 2, a second pin 6 and a ceramic capacitor 4;

[0031] The first pin 2 is sealed and connected to one end of the housing 1 through a high-temperature glass powder sintered layer 3;

[0032] The second pin 6 is also sealed and connected to the cover 5 through the high-temperature glass powder sintered layer 3;

[0033] The cover 5 is installed at the other end of the housing 1, and after the cover 5 is installed, the first pin 2 and the second pin 6 are plugged in;

[0034] The ceramic capacitor 4 is installed in the housing 1 and sleeved on the first pin 2;

[0035] When in use, the first pin 2 and the second pin 6 are respectively sealed and connected to the shell 1 and the cover 5 through the high-temperature glass powder sintered layer 3. After the ceramic capacitor 4 is placed inside the shell 1, the first pin 2 and the second pin 6 are connected and the shell 1 is sealed by installing the cover 5, thereby realizing glass sealing at both ends of the filter, so that the microfilter provided in the present application has high air tightness and high heat resistance, and is suitable for large-scale promotion and use.

[0036] It should be noted that, in the present application, the glass sealing at both ends of the filter is achieved by sealing the corresponding outer shell 1 and the cover 5 through the first pin 2 and the second pin 6 with the high-temperature glass powder sintered layer 3, and then the connection between the outer shell 1 and the cover 5 is achieved by soldering, thereby avoiding the influence of high temperature on the internal ceramic capacitor 4 during the production process.

[0037] In this embodiment, a stepped notch matched with the cover 5 is formed at the end of the housing 1, and the cover 5 is fixed in the stepped notch by soldering.

[0038] In this embodiment, a docking groove is provided at the top of the first pin 2, and a protrusion adapted to the docking groove is provided at one end of the second pin 6 close to the first pin 2, and the connection between the first pin 2 and the second pin 6 is achieved through the docking groove and the protrusion.

[0039] In this embodiment, the shell 1 and the cover 5 are both made of Kovar alloy. The sintering process of Kovar alloy and glass powder can improve the density and hardness of the material, have lower porosity and roughness, and have excellent heat resistance, corrosion resistance and mechanical properties.

[0040] In this embodiment, the housing 1 is formed by integrally die-casting a small round tube and a large round tube. The small round tube portion of the housing 1 is provided with external threads, and the provision of the external threads facilitates direct installation.

[0041] In this embodiment, the first pins 2, the ceramic capacitor 4 and the housing 1 are connected in pairs by soldering.

[0042] The working principle of the utility model is as follows:

[0043] The first pin 2 and the second pin 6 are respectively sealed and connected to the shell 1 and the cover 5 through the high-temperature glass powder sintered layer 3. After the ceramic capacitor 4 is placed inside the shell 1, the first pin 2 and the second pin 6 are connected and the shell 1 is sealed by installing the cover 5, thereby realizing glass sealing at both ends of the filter, so that the microfilter provided in the present application has high air tightness and high heat resistance, and is suitable for large-scale promotion and use.

[0044] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to software and methods.

[0045] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A micro filter based on glass and metal sealing technology, characterized in that: It includes a housing, a cover, a first pin, a second pin and a ceramic capacitor; The first pin is sealed and connected to one end of the housing through a high-temperature glass powder sintered layer; The second pin is also sealed and connected to the cover through a high-temperature glass powder sintered layer; The cover is installed at the other end of the housing, and after the cover is installed, the first pin and the second pin are plugged in; The ceramic capacitor is installed in the housing and sleeved on the first pin.

2. A microfilter based on glass-to-metal sealing technology according to claim 1, characterized in that: The end of the shell is provided with a stepped notch matched with the cover, and the cover is fixed in the stepped notch by soldering.

3. A microfilter based on glass-to-metal sealing technology according to claim 1, characterized in that: A docking groove is arranged at the top of the first plug pin, and a protrusion matched with the docking groove is arranged at one end of the second plug pin close to the first plug pin.

4. The microfilter based on glass-to-metal sealing technology according to claim 1, characterized in that: The shell and the cover are both made of Kovar alloy.

5. The microfilter based on glass-to-metal sealing technology according to claim 1, characterized in that: The shell is formed by integrally die-casting a small round tube and a large round tube, and the small round tube portion of the shell is provided with an external thread.

6. The microfilter based on glass-to-metal sealing technology according to claim 1, characterized in that: The first pins, the ceramic capacitor and the housing are connected in pairs by soldering.

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