Quartz tube sleeve for assembling bonding wire annealing tube gas sensor
By designing a quartz tube sleeve, the problems of inaccurate gas concentration control inside the annealing tube and the inability to install sensors were solved, enabling real-time monitoring and stable detection under high-temperature conditions, thereby improving production efficiency and detection accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-28
- Publication Date
- 2026-03-31
AI Technical Summary
The existing annealing tube structure cannot accurately control the concentration of the nitrogen and hydrogen mixture, and it cannot be monitored in real time under high temperature conditions. The sensor cannot be directly installed and fixed, resulting in inaccurate production conditions and inaccurate detection.
A quartz tube sleeve is designed, comprising a fixing tube, a limiting protrusion, and a mounting base, for convenient installation of a gas sensor. The inclined design and smooth curved surface structure ensure stable operation of the sensor in high-temperature environments, enabling real-time monitoring of gas concentration.
It enables precise monitoring of gas concentration inside the annealing tube, reduces gas leakage, improves detection accuracy and sensor lifespan, reduces production costs, and enhances the continuity and efficiency of the production process.
Smart Images
Figure CN224066771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of bonding wire production equipment, and in particular to a quartz tube sleeve for assembling a gas sensor for bonding wire annealing tubes. Background Technology
[0002] Bonding wires are core materials used in semiconductor packaging to connect chips to lead frames. Their production process requires annealing in an annealing furnace to improve their mechanical and electrical properties. To prevent secondary oxidation of the bonding wires during annealing and to eliminate trace surface oxidation, a mixture of nitrogen and hydrogen is typically introduced into the annealing furnace as a protective gas. In existing technologies, annealing tubes often only function as gas mixing devices. For example, the publicly disclosed "Gas-Protected Annealing Tube for Bonding Wires in an Annealing Furnace" achieves both gas mixing and protection functions by providing nitrogen and hydrogen inlets at the inlet extension section, outlet extension section, and annealing section, respectively, and by incorporating a partition with a hydrogen inlet hole within the annealing section. However, this structure has obvious drawbacks: on the one hand, nitrogen and hydrogen are introduced from different inlets and mix naturally, making it impossible to accurately obtain the actual concentration of the mixed gas in the annealing tube, which is not conducive to the precise control of production conditions; on the other hand, the temperature of the annealing furnace is extremely high when it is working, and conventional gas sensors cannot work directly in this high-temperature environment. Moreover, the existing annealing tube does not have a structure specifically designed for installing and fixing gas sensors, which makes it impossible to achieve real-time monitoring of the mixed gas concentration. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a quartz tube sleeve for assembling a bonded wire annealed tube gas sensor. It has a simple structure, is easy and reliable to assemble, facilitates monitoring of gas concentration, and has good performance.
[0004] To achieve the above objectives, this utility model provides a quartz tube sleeve for assembling a gas sensor in a bonded wire annealed tube, comprising a tube body, wherein the tube body is provided axially with a fixing tube for inserting into the annealed tube opening to achieve sleeve connection between the tube body and the annealed tube, a limiting protrusion for abutting against the end face of the annealed tube opening, and a mounting base for mounting the gas sensor. The limiting protrusion is disposed on the inner peripheral wall of the tube body, one end of the limiting protrusion is connected between the fixing tube and the mounting base, and the other end is inclined towards the direction of the fixing tube. A connecting platform is provided on the side wall of the mounting base, and a receiving cavity for accommodating the sensor body is formed in the connecting platform.
[0005] The advantages of this design are as follows: The fixed tube can be directly inserted into the annealing tube opening to complete the connection without any modification to the existing annealing tube structure. Assembly is convenient and the connection is secure, effectively preventing the tube sleeve from falling off. The limiting protrusion tilts towards the fixed tube and abuts against the end face of the annealing tube opening, precisely limiting the insertion depth of the tube sleeve and preventing damage to the sensor due to excessive insertion into the high-temperature area of the annealing furnace, ensuring stable operation of the sensor in the appropriate temperature environment. The accommodating cavity can stably accommodate the sensor body, and the connecting platform provides the structural foundation for the cooperation between the sensor and external components. This system enables real-time monitoring of the concentration of the nitrogen and hydrogen mixture inside the annealing tube. The inclined limiting protrusions enhance the sealing between the sleeve and the annealing tube opening, reducing gas leakage and improving the accuracy of concentration detection. Quartz material is the preferred material for the tube body, as it possesses high-temperature and corrosion resistance. Combined with this structure, it can adapt to the extreme working environment of the annealing furnace, extending the service life of the sleeve and sensor. The integrated structural design reduces production and assembly costs while facilitating subsequent disassembly and maintenance, improving the continuity and efficiency of the production process.
[0006] As a further feature of this invention, the end of the limiting protrusion is connected to the inner wall of the mounting base via a smooth curved surface.
[0007] The beneficial effects of this design are as follows: The smooth curved surface eliminates structural sharp edges, significantly reducing the resistance to gas flow within the tube. This allows the mixed gas inside the annealing tube to flow smoothly through the sensor's detection area, preventing localized concentration deviations caused by airflow turbulence and ensuring that the sensor collects accurate and uniform gas concentration data from within the tube. The smooth transition structure without sharp edges avoids stress concentration, effectively improving the structural strength of the quartz tube under the cyclical environment of high-temperature thermal expansion and contraction in the annealing furnace. This prevents cracking or damage caused by stress accumulation, extending product lifespan. The smooth curved surface also reduces gas eddies within the tube, avoiding interference with the stable gas atmosphere required for bonding wire annealing and indirectly ensuring the annealing quality of the bonding wire. The smooth gas channel also accelerates the response speed to concentration changes, allowing the sensor to more quickly capture fluctuations in gas concentration within the tube, improving the real-time performance of monitoring.
[0008] As a further feature of this invention, the connecting platform is provided with several wiring holes for sensor pins to pass through and to be electrically connected to an external PCB board.
[0009] The advantages of this design are as follows: Firstly, the wiring holes ensure precise alignment between the sensor pins and the external PCB board, guaranteeing a stable and reliable connection. This ensures a continuous and stable power supply to the sensor and avoids interruptions and interference during data transmission, allowing gas concentration data to be smoothly transmitted to the computer data acquisition software for real-time recording and analysis. Secondly, the wiring holes provide a clear installation and positioning reference for the pins, reducing alignment difficulties during assembly, improving assembly efficiency, and preventing poor contact due to installation deviations, thus reducing subsequent debugging and maintenance costs. The multiple wiring holes design can accommodate gas sensors with different pin counts and layouts, enhancing the versatility and adaptability of the quartz tube sleeve. The wiring holes also provide physical protection for the pins, reducing damage from high temperatures and gas corrosion, and extending the sensor's lifespan.
[0010] As a further feature of this invention, the limiting protrusion is connected to the middle position of the tube body.
[0011] The advantages of this design are as follows: The limiting protrusion in the middle position allows the length of the fixed tube inserted into the annealing tube to be balanced with the space in the mounting base to accommodate the sensor. This ensures the stability of the connection between the sleeve and the annealing tube, and also places the sensor at a reasonable distance from the annealing tube opening. This ensures the accuracy of concentration detection by being close to the gas detection area, while keeping it away from the high-temperature core area of the annealing furnace to prevent sensor failure due to high temperature. This layout also makes the sleeve uniformly stressed, reducing deformation caused by uneven stress during thermal expansion and contraction in high-temperature environments, thus ensuring structural stability and consistency in detection accuracy. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0013] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;
[0014] Figure 3 This is a structural schematic diagram of the embodiment of the present invention and the sensor assembly state. Detailed Implementation
[0015] This utility model provides an embodiment of a quartz tube sleeve for assembling a bonded wire annealed tube gas sensor, such as... Figures 1 to 3As shown, the device includes a tube body 1. The tube body 1 is provided axially with a fixing tube 11 for inserting into the annealing tube opening to achieve sleeve connection between the tube body 1 and the annealing tube, a limiting protrusion 12 for abutting against the end face of the annealing tube opening, and a mounting base 13 for installing a gas sensor. The limiting protrusion 12 is provided on the inner peripheral wall of the tube body 1. One end of the limiting protrusion 12 is connected between the fixing tube 11 and the mounting base 13, and the other end is inclined towards the direction of the fixing tube 11. A connecting platform 14 is provided on the side wall of the mounting base 13, and a receiving cavity for accommodating the sensor body is formed in the connecting platform 14. The advantages of this design are as follows: The fixed tube 11 can be directly inserted into the annealing tube opening to complete the connection without any modification to the existing annealing tube structure. Assembly is convenient and the connection is secure, effectively preventing the tube sleeve from falling off. The limiting protrusion 12 tilts towards the fixed tube 11 and abuts against the end face of the annealing tube opening, precisely limiting the insertion depth of the tube sleeve and preventing damage to the sensor due to excessive insertion into the high-temperature area of the annealing furnace, ensuring stable operation of the sensor in the appropriate temperature environment. The accommodating cavity can stably accommodate the sensor body, and the connecting platform 14 provides the structural basis for the cooperation between the sensor and external components. Ultimately, this enables real-time monitoring of the concentration of the nitrogen and hydrogen mixture inside the annealing tube. The inclined limiting protrusion 12 also enhances the fit and sealing between the sleeve and the annealing tube opening, reducing gas leakage and improving the accuracy of concentration detection. As a preferred material for manufacturing the tube body 1, quartz itself has high temperature resistance and corrosion resistance. Combined with this structure, it can adapt to the extreme working environment of the annealing furnace and extend the service life of the sleeve and sensor. The integrated structural design reduces production and assembly costs, while facilitating subsequent disassembly and maintenance, and improving the continuity and efficiency of the production process.
[0016] As a further feature of this embodiment, the end of the limiting protrusion 12 is connected to the inner wall of the mounting base 13 via a smooth curved surface. The advantages of this design are: the smooth curved surface eliminates structural sharp edges, significantly reducing the resistance to gas flow within the tube sleeve, allowing the mixed gas in the annealing tube to flow smoothly through the sensor detection area, avoiding local concentration deviations caused by airflow turbulence, and ensuring that the sensor collects true and uniform gas concentration data within the tube; the smooth transition structure without sharp edges avoids stress concentration, effectively improving the structural strength of the quartz tube sleeve under the cyclical environment of high-temperature thermal expansion and contraction in the annealing furnace, preventing cracking or damage due to stress accumulation, and extending product lifespan. The smooth curved surface also reduces gas eddies within the tube sleeve, avoiding interference with the stable gas atmosphere required for bonding wire annealing, indirectly ensuring the annealing quality of the bonding wire; the smooth gas channel also accelerates the response speed to concentration changes, allowing the sensor to more quickly capture fluctuations in gas concentration within the tube, improving the real-time performance of monitoring.
[0017] As a further feature of this embodiment, the connecting platform 14 is provided with several wiring holes 15 for sensor pins to pass through and electrically connect to an external PCB board. The advantages of this design are: Firstly, the wiring holes 15 ensure precise alignment between the sensor pins and the external PCB board, guaranteeing a stable and reliable connection. This ensures a continuous and stable power supply to the sensor and avoids interruptions and interference during data transmission, allowing gas concentration data to be smoothly transmitted to the computer data acquisition software for real-time recording and analysis. Secondly, the wiring holes 15 provide a clear installation and positioning reference for the pins, reducing alignment difficulties during assembly, improving assembly efficiency, and preventing poor contact due to installation deviations, thus reducing subsequent debugging and maintenance costs. The multiple wiring holes 15 can accommodate gas sensors with different pin counts and layouts, enhancing the versatility and adaptability of the quartz tube sleeve. The wiring holes 15 also provide physical protection for the pins, reducing damage from high temperatures and gas corrosion, and extending the sensor's lifespan.
[0018] As a further feature of this embodiment, the limiting protrusion 12 is connected at the middle position of the tube body 1. The beneficial effects of this configuration are as follows: With this configuration, the limiting protrusion 12 at the middle position allows the length of the fixed tube 11 inserted into the annealing tube to be balanced with the space of the mounting base 13 for accommodating the sensor. This ensures the stability of the connection between the tube sleeve and the annealing tube, and also allows the sensor to be positioned at a reasonable distance from the opening of the annealing tube. This position ensures the accuracy of concentration detection by being close to the gas detection area, while keeping it away from the high-temperature core area of the annealing furnace, preventing the sensor from failing due to high temperature. This layout also ensures that the tube sleeve is subjected to uniform stress, reducing deformation caused by uneven stress during thermal expansion and contraction in a high-temperature environment, and ensuring the consistency of structural stability and detection accuracy.
[0019] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.
Claims
1. A quartz tube sleeve for a bonded wire annealed tube gas sensor assembly comprising a tube body, characterised in that: The pipe body is sequentially provided with a fixing pipe for inserting into the annular pipe nozzle to realize the sleeving of the pipe body and the annular pipe, a limiting protrusion for abutting against the end face of the annular pipe nozzle, and a mounting seat for mounting a gas sensor, the limiting protrusion is arranged on the inner circumferential wall of the pipe body, one end of the limiting protrusion is connected between the fixing pipe and the mounting seat, and the other end is arranged in an inclined manner towards the direction of the fixing pipe, and a connecting table is arranged on the side wall of the mounting seat, and a containing cavity for containing a sensor main body is formed in the connecting table.
2. The quartz tube sleeve for a bonded wire annealed tube gas sensor assembly of claim 1, wherein: The end of the limiting protrusion is connected with the inner wall of the mounting seat through a smooth curved surface.
3. The quartz tube sleeve for a bonded wire annealed tube gas sensor assembly of claim 1, wherein: A plurality of wiring holes for allowing sensor pins to pass through and be electrically connected with an external PCB are arranged on the connecting table.
4. The quartz tube sleeve for a bonded wire annealed tube gas sensor assembly of claim 1, wherein: The limiting protrusion is connected at the middle position of the pipe body.