A high-reliability support structure for getter built into activation lead pin and implementation method thereof

Abstract

The present invention discloses a high-reliability support structure for a getter built into an activation lead pin and a method for implementing the same. The structure includes a housing, a hollow sealing transition piece, a hollow insulating ceramic transition piece, a hollow brazing transition piece, a "5"-shaped fixed support, a hollow electrical cross-pin sleeve, a getter, and an "L"-shaped fixed support with a hook at the end. The hollow sealing transition piece, the hollow insulating ceramic transition piece, the hollow brazing transition piece, and the "L"-shaped fixed support with a hook at the end are airtightly welded by vacuum brazing, and are airtightly welded to the housing by laser welding, thereby embedding the activation lead pin inside. The present invention presses the electrical cross-pin together with the "5"-shaped and "L"-shaped fixed supports with hooks at the end through a sleeve, and reinforces the "5"-shaped fixed support and the housing by butt welding and silver paste. The present invention introduces a specific structure to achieve a high-reliability support structure for a getter built into the activation lead pin, which is suitable for situations where the getter needs to be tested and assessed in harsh environments.

Description

Technical Field

[0001] This invention relates to a dewar fabrication technology for infrared detector components, specifically a structure for mounting a getter inside a dewar. This structure is suitable for applications where collision protection of getter activation pins requires internal placement, and also for applications where getters require rigorous environmental testing and assessment. Background Art

[0002] Vacuum life is a critical technical indicator for infrared detector dewar assemblies. Factors influencing the vacuum life of infrared detector dewar assemblies primarily include: 1) the overall leak rate of the dewar; 2) the materials and degassing process of the dewar components; 3) the ultimate vacuum, bakeout temperature, and degassing time of the dewar assembly; and 4) the installation of a getter within the dewar assembly. The first three factors are primarily dependent on the quality of infrared detector and dewar fabrication, as well as the production and processing of the raw materials used. Installing a getter is a significant method for increasing vacuum life.

[0003] Traditional getter installation supports generally use a mechanical support Ω ring and a getter single-point butt welding to fix them, and the getter activation metal needle is externally mounted. For example, Chinese patent CN200910226511.4 discloses a getter installation structure and implementation method in an infrared detector dewar, which uses a mechanical support Ω ring, an arc cross needle, a series cross needle and a loop L-shaped needle to connect multiple getters in series. The advantage is that multiple getters in the cavity are connected in series, but the disadvantage is that the series cross needle and the loop L-shaped needle are fixed to the getter needle by single-point butt welding, and the mechanical support Ω ring is single-point butt welding to the metal shell, which is very easy to fall off under harsh conditions such as large-scale mechanical impact; Chinese patent CN201910654876.0 provides a vacuum dewar assembly with an external getter, which connects the getter Externally placed, it reduces the heat transferred to the chip when the getter is activated, but the appearance of this structure is not beautiful, and the mechanical support is not strong; Chinese patents CN201911065018.9 and CN201910654876.0 adopt the same idea, setting two protrusions, which affects the appearance and increases the outgassing source; Chinese patent 202210727728.9 provides an getter adaptive packaging structure and installation method, which adopts a fixed ring composed of a single annular part and a connecting part, and has an elastic adaptive structure, but the mechanical reliability of the support structure is poor, and the reliability of the getter cross-pin reinforcement is poor; Chinese patent CN 201821354714.2 connects each getter in series, and there is no effective getter installation and fixing structure. In the above patents, the insulator (ceramic seal) metal needles connected to the getter activation metal needles are all placed outside the Dewar shell, which is very likely to cause the ceramic seal to fail due to force majeure, thereby causing the entire Dewar assembly to fail in sealing. In summary, there is an urgent need to provide a high-strength reinforcement method for the getter electrical connecting pins, and effectively prevent vacuum leakage caused by accidental contact of the external activation lead pins, so as to achieve high-strength reinforcement of the electrical connecting pins, thereby improving the high reliability of the electrical connecting pins and the activation lead pins. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-reliability support structure for a getter with an activation lead pin built in and an implementation method thereof, so as to solve the problems existing in the external placement of the activation lead pin for the getter in the traditional infrared detector dewar and the installation of the electrical cross pin, which is beneficial to the high reliability of the getter installation structure of the infrared detector dewar assembly, the improvement of the vacuum life and the miniaturization of the dewar.

[0005] This patent is a high-reliability support structure for the built-in getter of the activation lead needle. Figure 1 As shown, it mainly includes a shell 1, a hollow sealing transition piece 2, a hollow insulating ceramic transition piece 3, a hollow brazing transition piece 4, a "5"-shaped fixed support 5, a hollow electrical cross-needle sleeve 6, a getter 7 and an "L"-shaped fixed support 8 with a hook at the end.

[0006] The shell 1 of the high-reliability support structure of the getter with built-in activation lead pin. Figure 2 , including an outer shell surface 101, an outer shell hole 102, an inner shell hole 103, and an inner shell surface 104. Shell 1 is made of Kovar or stainless steel with a wall thickness of 0.8mm-1.5mm. After processing, the entire shell is nickel-plated with a thickness of 0.01mm-0.02mm. The outer shell hole 102 and the inner shell hole 103 are pre-processed on its side. The outer shell hole 102 has a diameter of 4mm-6mm and a thickness of 0.4mm-1mm. The inner shell hole 103 has a diameter of 4.4mm-6.4mm.

[0007] The hollow sealing transition piece 2 of the high-reliability support structure of the getter with built-in activation lead needle. Figure 3 The hollow sealing transition piece comprises an outer boss 201, an outer boss end face 202, an inner boss 203, and an inner boss end face 204. The hollow sealing transition piece 2 is made of Kovar material and nickel-plated. The nickel layer meets the requirements for vacuum brazing at 700°C-900°C. The outer diameter of the outer boss 201 is 0.02mm-0.06mm smaller than the diameter of the outer hole 102 of the housing. The height of the outer boss 201 is the same as the thickness of the outer hole 102 of the housing. The wall thickness of the outer boss 201 is 0.5mm-0.8mm. The outer diameter of the inner boss 203 of the hollow sealing transition piece is 0.02mm-0.06mm smaller than the diameter of the inner hole 103 of the housing, and the inner hole diameter of the inner boss 203 of the hollow sealing transition piece is 0.2mm-0.4mm larger than the inner hole diameter of the outer boss 201 of the hollow sealing transition piece.

[0008] The hollow insulating ceramic transition piece 3 of the high-reliability support structure of the getter built into the activation lead pin is as shown in the attached Figure 4 A ceramic material with a thickness of 0.3mm to 0.5mm, such as AlN or Al2O3, is used. After the entire piece is plated with a molybdenum-manganese slurry, it is metallized and then nickel-plated. The outer diameter of the hollow insulating ceramic transition piece 3 is equal to the outer diameter of the inner boss 203 of the hollow sealing transition piece, and the inner diameter of the hollow insulating ceramic transition piece 3 is equal to the inner diameter of the inner boss 203 of the hollow sealing transition piece.

[0009] The hollow brazing transition piece 4 of the high-reliability support structure of the getter built into the activation lead needle is as shown in the attached Figure 5The hollow brazing transition piece 4 is made of Kovar with a nickel-plated surface. The nickel layer meets vacuum brazing requirements at 700°C-1060°C. The outer diameter of the hollow brazing transition piece 4 is equal to the outer diameter of the inner boss 203 of the hollow sealing transition piece. The diameter of the hollow brazing transition piece's inner hole 401 is 0.02mm-0.04mm larger than the diameter of the "L"-shaped fixed support weld 803 with a hook at the end.

[0010] The "5"-shaped fixed support 5 of the high-reliability support structure for the built-in getter of the activation lead needle is as shown in the attached Figure 6 The "5"-shaped fixed support 5 is made of Kovar or stainless steel. The inner diameter of the "5"-shaped fixed support crimping portion 501 is 0.2mm-0.4mm larger than the outer diameter of the hollow electrical cross-pin sleeve 6. The outer radius of curvature of the "5"-shaped fixed support welding portion 503 is equal to the radius of curvature of the inner side surface 104 of the housing. The diameter of the "5"-shaped fixed support connecting portion 502 is 0.5mm-1mm.

[0011] The hollow electric cross needle sleeve 6 of the high-reliability support structure of the built-in getter of the activation lead needle is as shown in the attached Figure 7 The hollow electric coupling needle sleeve 6 is made of Kovar or stainless steel. The diameter of the inner hole 601 of the hollow electric coupling needle sleeve is equal to the outer diameter of the right electric coupling needle 702, and the outer diameter of the hollow electric coupling needle sleeve 6 is 0.6mm-1mm.

[0012] The end portion of the L-shaped fixed support 8 with a hook for the built-in getter of the activation lead needle is as shown in the attached Figure 9 The L-shaped support 8 includes a hooked L-shaped crimping portion 801, a hooked L-shaped connecting portion 802, and a hooked L-shaped welding portion 803. The hooked L-shaped support 8 is made of Kovar or stainless steel. The inner diameter of the hooked L-shaped crimping portion 801 is 0.2mm-0.4mm larger than the outer diameter of the hollow electrical cross-pin sleeve 6. The diameter of the hooked L-shaped welding portion 803 is 0.5mm-1mm.

[0013] The present invention is implemented as follows: the "L"-shaped fixed support welding portion 803 with a hook at the end and the hollow brazing transition piece 4 are airtightly fixed by vacuum brazing, and the length of the "L"-shaped fixed support welding portion 803 with a hook at the end is controlled to be 1mm-5mm, and the end face of the "L"-shaped fixed support welding portion 803 with a hook at the end is ensured to be flush with the end face 202 of the outer boss of the hollow sealing transition piece, the hollow brazing transition piece 4 is airtightly fixed to the hollow insulating ceramic transition piece 3 by vacuum brazing, the hollow insulating ceramic transition piece 3 is airtightly fixed to the hollow sealing transition piece 2 by vacuum brazing, and the outer boss end face 202 of the hollow sealing transition piece formed by welding is airtightly welded to the outer side surface 101 of the shell by laser welding or argon arc welding, as shown in FIG. Figure 10 As shown; the "5"-shaped fixed support welding portion 503 is fixed to the inner side surface 104 of the shell by butt welding, and then the "5"-shaped fixed support 5 and the inner side surface 104 of the shell are reinforced by silver paste solder; the hollow electrical connecting cross needle sleeve 6 is pre-crimped with the left electrical connecting cross needle 701 and the right electrical connecting cross needle 702 respectively, and the getter 7 with the hollow electrical connecting cross needle sleeve 6 is crimped into the "L"-shaped fixed support crimping portion 801 with a hook at the end, and finally the "5"-shaped fixed support crimping portion 501 is crimped into the getter 7.

[0014] The method for implementing the high-reliability support structure of the getter built into the activation lead pin is as follows:

[0015] 1) Pre-process the "L"-shaped fixed support 8 with a hook at the end into the required shape;

[0016] 2) The "L"-shaped fixed support weld portion 803 with a hook at the end and the hollow brazing transition piece 4 are fixed airtightly by vacuum brazing, ensuring that the length of the "L"-shaped fixed support weld portion 803 with a hook at the end is controlled within 1 mm to 5 mm, and that the end surface of the "L"-shaped fixed support weld portion 803 with a hook at the end is flush with the end surface 202 of the outer boss of the hollow sealing transition piece;

[0017] 3) fixing the hollow brazing transition piece 4 welded in step 2 to the hollow insulating ceramic transition piece 3 and the hollow sealing transition piece 2 by vacuum brazing to ensure airtightness;

[0018] 4) Use a special tool to test the hollow insulating ceramic transition piece 3 prepared in step 3) for leakage. When the leakage rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified;

[0019] 5) The outer boss end face 202 of the hollow sealing transition piece completed in step 4) is fixed to the outer side face 101 of the housing by laser welding or argon arc welding to achieve airtightness;

[0020] 6) Use special tooling to test the shell 1 prepared in step 5 for leaks. When the leak rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified;

[0021] 7) Pre-process the "5"-shaped fixed support 5 into the required shape;

[0022] 8) Butt-weld the "5"-shaped fixed support welding portion 503 to the inner side surface 104 of the housing through which the leak detection is conducted;

[0023] 9) Applying silver paste solder to the contact surface between the "5"-shaped fixed support welding portion 503 fixed by butt welding in step 8) and the inner side surface 104 of the housing, and heating and curing;

[0024] 10) Pre-press and form the hollow interconnecting needle sleeve 6 with the left interconnecting needle 701 and the right interconnecting needle 702 respectively;

[0025] 11) The getter 7 completed in step 10) is fixed inside the inner circular hole of the "L"-shaped fixed support crimping part 801 with a hook at the end and the inner circular hole of the "5"-shaped fixed support crimping part 501, and crimped into shape using a special tool.

[0026] The advantages of the present invention are:

[0027] (1) The present invention has a simple structure, is easy to operate, and has low cost;

[0028] (2) The present invention adopts the method of placing the getter activation lead pin inside the Dewar housing, which reduces the risk of damaging the activation lead pin compared to placing the activation lead pin outside.

[0029] (3) The getter electrical connection pin of the present invention is formed by crimping with the activation lead pin, which is more reliable than the traditional welding method;

[0030] (4) The getter electrical cross-pin support legs of the present invention adopt a method of butt welding and silver paste reinforcement, which is more reliable than the traditional butt welding method;

[0031] (5) The present invention can solve the problem of high reliability of the getter in the dewar of traditional infrared detectors, and has a compact structure and can be used in situations where harsh environmental testing and assessment are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A general diagram of a high-reliability support structure for a getter built into an activation lead pin and its implementation method;

[0033] In the figure: 1 - housing;

[0034] 101—outer side of the shell;

[0035] 102—hole on the outer side of the shell;

[0036] 103—hole inside the shell;

[0037] 104—Inner side of the shell;

[0038] 2—Hollow sealing transition piece;

[0039] 201—outer boss of hollow sealing transition piece;

[0040] 202—end surface of outer boss of hollow sealing transition piece;

[0041] 203—Inner boss of hollow sealing transition piece;

[0042] 204—end surface of inner boss of hollow sealing transition piece;

[0043] 3—Hollow insulating ceramic transition piece;

[0044] 4—Hollow brazing transition piece;

[0045] 401—Inner hole of hollow brazing transition piece;

[0046] 5—“5” shaped fixed support;

[0047] 501—“5” shaped fixed support crimping portion;

[0048] 502—“5” shaped fixed support connection part;

[0049] 503—“5” shaped fixed support welding part;

[0050] 6—Hollow electric cross needle sleeve;

[0051] 601—Inner hole of hollow electric cross needle sleeve;

[0052] 7—Getter;

[0053] 701—left electrical connection horizontal needle;

[0054] 702—right electrical connection pin;

[0055] 8—"L" shaped fixed support with hook at the end;

[0056] 801—"L" shaped fixed support crimping portion with hook at the end;

[0057] 802 — "L" shaped fixed support connection with a hook at the end;

[0058] 803—"L" shaped fixed support welding part with hook at the end;

[0059] Figure 2 Schematic diagram of the structure of the shell;

[0060] Figure 3 It is a structural schematic diagram of a hollow sealing transition piece;

[0061] Figure 4 It is a structural schematic diagram of a hollow insulating ceramic transition piece;

[0062] Figure 5 It is a structural schematic diagram of a hollow brazing transition piece;

[0063] Figure 6 This is a structural diagram of a "5"-shaped fixed support;

[0064] Figure 7 This is a schematic diagram of the structure of the hollow electric cross-needle sleeve;

[0065] Figure 8 is a schematic diagram of the structure of the getter;

[0066] Figure 9 This is an "L" shaped fixed support diagram with a hook at the end;

[0067] Figure 10 Diagram of an "L"-shaped fixing support with a hook on the end built into the soldered getter activation lead pin. DETAILED DESCRIPTION

[0068] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0069] For example, a 1024×512 short-wave infrared detector dewar assembly for a certain aerospace project has a housing 1 with an inner diameter of Φ56.2mm and an outer diameter of Φ58.2mm. The getter used is a getter with an inlet diameter of 4mm. The diameters of the left and right electrical cross pins 701 and 702 are both Φ0.21mm, and the diameter of the "L"-shaped fixed support weld 803 with a hook at the end is Φ1mm. A high-reliability getter support structure with built-in activation lead pins includes a housing 1, a hollow sealing transition piece 2, a hollow insulating ceramic transition piece 3, a hollow brazing transition piece 4, a "5"-shaped fixed support 5, a hollow electrical cross pin sleeve 6, a getter 7, and an "L"-shaped fixed support 8 with a hook at the end. The "L"-shaped fixed support welding portion 803 with a hook at the end and the hollow brazing transition piece 4 are fixed in an airtight manner by vacuum brazing, and the length of the "L"-shaped fixed support welding portion 803 with a hook at the end is controlled within 1mm-5mm, and the end face of the "L"-shaped fixed support welding portion 803 with a hook at the end is ensured to be flush with the end face 202 of the outer boss of the hollow sealing transition piece. The hollow brazing transition piece 4 is fixed in an airtight manner to the hollow insulating ceramic transition piece 3 by vacuum brazing, and the hollow insulating ceramic transition piece 3 is fixed in an airtight manner to the hollow sealing transition piece 2 by vacuum brazing, and the outer boss end face 202 of the hollow sealing transition piece formed by welding is fixed in an airtight manner to the outer side surface 101 of the shell by laser welding or argon arc welding, as shown in FIG. Figure 10 As shown; the "5"-shaped fixed support welding portion 503 is fixed to the inner side surface 104 of the shell by butt welding, and then the "5"-shaped fixed support 5 and the inner side surface 104 of the shell are reinforced by silver paste solder; the hollow electrical connecting cross needle sleeve 6 is pre-crimped with the left electrical connecting cross needle 701 and the right electrical connecting cross needle 702 respectively, and the getter 7 with the hollow electrical connecting cross needle sleeve 6 is crimped into the "L"-shaped fixed support crimping portion 801 with a hook at the end, and finally the "5"-shaped fixed support crimping portion 501 is crimped into the getter 7.

[0070] 1. Method for preparing parts of the present invention:

[0071] (a) A housing 1 of a high-reliability support structure for a getter with built-in activation lead pin. Figure 2 , including the outer shell side 101, the outer shell hole 102, the inner shell hole 103, and the inner shell side 104. The outer shell 1 is made of 304L material with a wall thickness of 1.2mm. The outer shell hole 102 and the inner shell hole 103 are pre-processed on its side. The outer shell hole 102 has a diameter of 4mm and a thickness of 0.6mm. The inner shell hole 103 has a diameter of 5mm.

[0072] (b) A hollow sealing transition piece 2 of a high-reliability support structure for a getter with a built-in activation lead pin. Figure 3 The hollow sealing transition piece comprises an outer boss 201, an outer boss end face 202, an inner boss 203, and an inner boss end face 204. The hollow sealing transition piece 2 is made of Kovar material and nickel-plated. The nickel layer meets the requirements for vacuum brazing at 700°C-900°C. The outer diameter of the outer boss 201 is 3.96mm. The height of the outer boss 201 is the same as the thickness of the outer hole 102 of the housing, which is 0.6mm. The wall thickness of the outer boss 201 is 0.5mm, and the inner diameter of the outer boss 201 is 3mm. The outer diameter of the inner boss 203 is 4.94mm, and the inner diameter of the inner hole is 3.3mm.

[0073] (c) A hollow insulating ceramic transition piece 3 of a high-reliability support structure for a built-in getter of an activation lead pin, as shown in the attached Figure 4 0.5mm thick AlN ceramic material was used, and after metallization with a molybdenum-manganese slurry, nickel plating was performed. The outer diameter of the hollow insulating ceramic transition piece 3 is equal to the outer diameter of the inner boss 203 of the hollow sealing transition piece, which is 4.94mm. The inner diameter of the hollow insulating ceramic transition piece 3 is equal to the inner diameter of the inner boss 203 of the hollow sealing transition piece, which is 3.3mm.

[0074] (d) A hollow brazing transition piece 4 of a high-reliability support structure for a built-in getter activated lead needle, as shown in the attached Figure 5 The hollow brazing transition piece 4 is made of Kovar with a nickel-plated surface. The nickel layer meets vacuum brazing requirements at 700°C-1060°C. The outer diameter of the hollow brazing transition piece 4 is equal to the outer diameter of the inner boss 203 of the hollow sealing transition piece, both measuring 4.94 mm. The diameter of the hollow brazing transition piece's inner bore 401 is 1.03 mm.

[0075] (e) The "5"-shaped fixed support 5 of the high-reliability support structure for the built-in getter of the activation lead needle, as shown in the attached Figure 6 The "5"-shaped fixed support 5 is made of stainless steel, including a "5"-shaped fixed support crimping portion 501, a "5"-shaped fixed support connecting portion 502, and a "5"-shaped fixed support welding portion 503. The inner diameter of the "5"-shaped fixed support crimping portion 501 is 0.8mm. The outer radius of curvature of the "5"-shaped fixed support welding portion 503 is equal to the curvature radius of the inner side surface 104 of the housing, which is 56.2mm. The diameter of the "5"-shaped fixed support connecting portion 502 is 1mm.

[0076] (f) A hollow electrical cross-needle sleeve 6 of a high-reliability support structure for the built-in getter of the activation lead needle, as shown in the attached Figure 7 The hollow electric coupling needle sleeve 6 is made of Kovar or stainless steel. The diameter of the inner hole 601 of the hollow electric coupling needle sleeve is equal to the outer diameter of the right electric coupling needle 702, which is 0.21mm. The outer diameter of the hollow electric coupling needle sleeve 6 is 0.6mm.

[0077] (g) The "L"-shaped fixed support 8 with a hook at the end of the high-reliability support structure of the built-in getter of the activation lead needle, as shown in the attached Figure 9 The L-shaped support 8 includes a hooked L-shaped crimping portion 801, a hooked L-shaped connecting portion 802, and a hooked L-shaped welding portion 803. The L-shaped support 8 is made of Kovar or stainless steel. The inner diameter of the hooked L-shaped crimping portion 801 is 0.8 mm, and the diameter of the hooked L-shaped welding portion 803 is 1 mm.

[0078] 2. Assembly and connection steps

[0079] 1) Pre-process the "L"-shaped fixed support 8 with a hook at the end into the required shape;

[0080] 2) The "L"-shaped fixed support weld portion 803 with a hook at the end and the hollow brazing transition piece 4 are fixed airtightly by vacuum brazing, ensuring that the length of the "L"-shaped fixed support weld portion 803 with a hook at the end is controlled within 1 mm to 5 mm, and that the end surface of the "L"-shaped fixed support weld portion 803 with a hook at the end is flush with the end surface 202 of the outer boss of the hollow sealing transition piece;

[0081] 3) fixing the hollow brazing transition piece 4 welded in step 2 to the hollow insulating ceramic transition piece 3 and the hollow sealing transition piece 2 by vacuum brazing to ensure airtightness;

[0082] 4) Use a special tool to test the hollow insulating ceramic transition piece 3 prepared in step 3) for leakage. When the leakage rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified;

[0083] 5) The outer boss end face 202 of the hollow sealing transition piece completed in step 4) is fixed to the outer side face 101 of the housing by laser welding or argon arc welding to achieve airtightness;

[0084] 6) Use special tooling to test the shell 1 prepared in step 5 for leaks. When the leak rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified;

[0085] 7) Pre-process the "5"-shaped fixed support 5 into the required shape;

[0086] 8) Butt-weld the "5"-shaped fixed support welding portion 503 to the inner side surface 104 of the housing through which the leak detection is conducted;

[0087] 9) Applying silver paste solder to the contact surface between the "5"-shaped fixed support welding portion 503 fixed by butt welding in step 7) and the inner side surface 104 of the housing, and heating and curing;

[0088] 10) Pre-press and form the hollow interconnecting needle sleeve 6 with the left interconnecting needle 701 and the right interconnecting needle 702 respectively;

[0089] 11) The getter 7 completed in step 10) is fixed inside the inner circular hole of the "L"-shaped fixed support crimping part 801 with a hook at the end and the inner circular hole of the "5"-shaped fixed support crimping part 501, and crimped into shape using a special tool.

[0090] The above has realized the final assembly of a high-reliability support structure of a getter with built-in activation lead pins for a 1024×512 short-wave infrared detector component.

Claims

1. A high-reliability support structure for a built-in getter in an activation lead pin, comprising a housing (1), a hollow sealing transition piece (2), a hollow insulating ceramic transition piece (3), a hollow brazing transition piece (4), a "5"-shaped fixed support (5), a hollow electrical cross-pin sleeve (6), a getter (7), and an "L"-shaped fixed support (8) with a hook at the end, characterized in that: The "L"-shaped fixed support welding portion (803) with a hook at the end and the hollow brazing transition piece (4) are fixed in an airtight manner by vacuum brazing, and the length of the "L"-shaped fixed support welding portion (803) with a hook at the end is controlled within 1 mm to 5 mm, and the end face of the "L"-shaped fixed support welding portion (803) with a hook at the end is ensured to be flush with the end face (202) of the outer boss of the hollow sealing transition piece, the hollow brazing transition piece (4) and the hollow insulating ceramic transition piece (3) are fixed in an airtight manner by vacuum brazing, the hollow insulating ceramic transition piece (3) and the hollow sealing transition piece (2) are fixed in an airtight manner by vacuum brazing, and the outer boss end face (202) of the hollow sealing transition piece formed by welding is flush with the end face (203) of the outer boss of the hollow sealing transition piece. 2) achieving airtight welding fixation with the outer side surface (101) of the shell by laser welding or argon arc welding; fixing the "5"-shaped fixed support welding portion (503) with the inner side surface (104) of the shell by butt welding, and then reinforcing the "5"-shaped fixed support (5) and the inner side surface (104) of the shell by silver paste solder; pre-pressing the hollow electric connecting needle sleeve (6) with the left electric connecting needle (701) and the right electric connecting needle (702) respectively, pressing the getter (7) with the hollow electric connecting needle sleeve (6) and the "L"-shaped fixed support pressing portion (801) with a hook at the end to form, and finally pressing the "5"-shaped fixed support pressing portion (501) and the getter (7) to form.

2. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The shell (1) comprises: an outer shell surface (101), an outer shell hole (102), an inner shell hole (103), and an inner shell surface (104); wherein the shell (1) is made of Kovar or stainless steel, and has a wall thickness of 0.8 mm to 1.5 mm. The outer shell hole (102) and the inner shell hole (103) are pre-processed, the outer shell hole (102) has a diameter of 4 mm to 6 mm, a thickness of 0.4 mm to 1 mm, and the inner shell hole (103) has a diameter of 4.4 mm to 6.4 mm.

3. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The hollow sealing transition piece (2) comprises: an outer boss (201) of the hollow sealing transition piece, an end face (202) of the outer boss of the hollow sealing transition piece, an inner boss (203) of the hollow sealing transition piece, and an end face (204) of the inner boss of the hollow sealing transition piece; wherein the hollow sealing transition piece (2) is made of Kovar material, and the outer diameter of the outer boss (201) of the hollow sealing transition piece is 0.02mm-0.06mm smaller than the diameter of the outer hole (102) of the shell; the outer boss of the hollow sealing transition piece is 0.02mm-0.06mm smaller than the diameter of the outer hole (102) of the shell; the outer boss of the hollow sealing transition piece is 0.02mm-0.06mm smaller than the outer ... The height of the platform (201) is equal to the thickness of the outer hole (102) of the shell, and the wall thickness of the outer boss (201) of the hollow sealing transition piece is 0.5mm-0.8mm; the outer diameter of the inner boss (203) of the hollow sealing transition piece is 0.02mm-0.06mm smaller than the diameter of the inner hole (103) of the shell, and the inner hole diameter of the inner boss (203) of the hollow sealing transition piece is 0.2mm-0.4mm larger than the inner hole diameter of the outer boss (201) of the hollow sealing transition piece.

4. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The hollow insulating ceramic transition piece (3) is made of a ceramic material with a thickness of 0.3mm to 0.5mm; the outer diameter of the hollow insulating ceramic transition piece (3) is equal to the outer diameter of the inner boss (203) of the hollow sealing transition piece, and the inner diameter of the hollow insulating ceramic transition piece (3) is equal to the inner hole diameter of the inner boss (203) of the hollow sealing transition piece.

5. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The hollow brazing transition piece (4) is made of Kovar material. The outer diameter of the hollow brazing transition piece (4) is equal to the outer diameter of the inner boss (203) of the hollow sealing transition piece. The diameter of the inner hole (401) of the hollow brazing transition piece is 0.02mm-0.04mm larger than the diameter of the "L"-shaped fixed support welding part (803) with a hook at the end.

6. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The "5"-shaped fixed support (5) comprises: a "5"-shaped fixed support crimping portion (501), a "5"-shaped fixed support connecting portion (502), and a "5"-shaped fixed support welding portion (503). The "5"-shaped fixed support (5) is made of Kovar or stainless steel. The inner diameter of the "5"-shaped fixed support crimping portion (501) is 0.2mm-0.4mm larger than the outer diameter of the hollow electrical cross-pin sleeve (6). The outer circle curvature radius of the "5"-shaped fixed support welding portion (503) is equal to the curvature radius of the inner side surface (104) of the shell. The diameter of the "5"-shaped fixed support connecting portion (502) is 0.5mm-1mm.

7. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The hollow electric coupling needle sleeve (6) is made of Kovar or stainless steel; the diameter of the inner hole (601) of the hollow electric coupling needle sleeve is equal to the outer diameter of the right electric coupling needle (702), and the outer diameter of the hollow electric coupling needle sleeve (6) is 0.6mm-1mm.

8. The high-reliability support structure for a getter with built-in activation lead pin according to claim 1, characterized in that: The "L"-shaped fixed support (8) with a hook at the end comprises: an "L"-shaped fixed support crimping portion (801) with a hook at the end, an "L"-shaped fixed support connecting portion (802) with a hook at the end, and an "L"-shaped fixed support welding portion (803) with a hook at the end. The "L"-shaped fixed support (8) with a hook at the end is made of Kovar or stainless steel. The inner diameter of the "L"-shaped fixed support crimping portion (801) with a hook at the end is 0.2mm-0.4mm larger than the outer diameter of the hollow electrical cross-needle sleeve (6), and the diameter of the "L"-shaped fixed support welding portion (803) with a hook at the end is 0.5mm-1mm.

9. A method for realizing a high-reliability support structure of a getter built into a lead pin, characterized in that The following steps are involved: 1) Pre-process the "L"-shaped fixed support (8) with a hook at the end into the required shape; 2) The "L"-shaped fixed support welding portion (803) with a hook at the end and the hollow brazing transition piece (4) are fixed together in an airtight manner by vacuum brazing, ensuring that the length of the "L"-shaped fixed support welding portion (803) with a hook at the end is controlled within a range of 1 mm to 5 mm, and ensuring that the end surface of the "L"-shaped fixed support welding portion (803) with a hook at the end is flush with the end surface of the outer boss (202) of the hollow sealing transition piece; 3) fixing the hollow brazing transition piece (4) welded in step 2) to the hollow insulating ceramic transition piece (3) and the hollow sealing transition piece (2) by vacuum brazing to ensure airtightness; 4) Use a special tool to test the hollow insulating ceramic transition piece (3) prepared in step 3) for leakage. When the leakage rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified; 5) The outer boss end face (202) of the hollow sealing transition piece completed in step 4) is fixed to the outer side face (101) of the housing by laser welding or argon arc welding to achieve airtight welding; 6) Use special tooling to test the shell (1) prepared in step 5) for leaks. When the leak rate is less than 3×10 -11 Pa.m 3 / s, the leak test is qualified; 7) Pre-process the "5"-shaped fixed support (5) into the required shape; 8) Butt-welding the "5"-shaped fixed support welding portion (503) to the inner side surface (104) of the housing through which the leak detection passes; 9) coating the contact surface between the "5"-shaped fixed support welding portion (503) fixed by butt welding in step 8) and the inner side surface (104) of the housing with silver paste solder, and heating and curing; 10) Pre-compression-bonding the hollow electrical connection needle sleeve (6) with the left electrical connection needle (701) and the right electrical connection needle (702) respectively; 11) The getter (7) completed in step 10) is fixed inside the inner circular hole of the "L"-shaped fixed support crimping portion (801) with a hook at the end and the inner circular hole of the "5"-shaped fixed support crimping portion (501), and crimped into shape using a special tool.

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