Silver paste box and centrifugal device
By setting the contact surface in the silver paste box to tightly tighten the edge of the inner cover, the problem of poor sealing of the silver paste box is solved, and reliable sealing under high temperature and high-speed centrifugation conditions is achieved, which improves the storage and use performance of the silver paste.
Patent Information
- Application Number
- CN202422722277.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The existing silver paste boxes have poor sealing properties and are prone to leakage during high temperatures or centrifugation, which cannot meet the packaging needs of third-generation semiconductor material SiC devices.
A silver paste box is designed, including a box base, a box outer cover and a sealed inner cover. By setting a contact surface in the positioning cavity, the box outer cover can tightly press the edge of the inner cover during assembly, forming a reliable seal to prevent leakage.
It effectively prevents leakage of silver paste box during high temperature or centrifugation, improves sealing performance, ensures the purity and sintering effect of silver paste, and adapts to high temperature and high-speed centrifugation environments.
Smart Images
Figure CN223300172U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of sintering fixture equipment, in particular to a silver paste box and a centrifugal device. Background Art
[0002] Third-generation semiconductor materials (such as SiC) have become a popular choice for optoelectronic devices, high-frequency, high-power, and high-temperature electronic devices due to their wide bandgap, high breakdown voltage, high thermal conductivity, and chemical stability. Research has shown that SiC devices can maintain excellent conversion characteristics and stable operation at temperatures as high as 350°C. However, high-temperature environments place higher demands on device packaging materials. Traditional packaging materials, such as solder paste and conductive adhesives, are unable to meet the high-temperature application requirements of SiC devices due to their low melting point and insufficient electrical and thermal conductivity.
[0003] Therefore, nano-sintered silver paste has become an ideal choice for the next generation of packaging interconnect materials. After low-temperature sintering, it has a melting point and electrical and thermal conductivity close to that of bulk metal, and can perform well in high-temperature service environments, meeting the high-temperature packaging material requirements of SiC semiconductor devices.
[0004] However, current sintered silver paste is generally stored in a silver paste box, but the inner cover of the current silver paste box is often not tightly sealed and is prone to loosening, especially during the centrifugation process, which often leads to leakage of the silver paste in the silver paste box. Utility Model Content
[0005] The purpose of the embodiments of the present application is to provide a silver paste box, aiming to solve the problem of how to improve the sealing performance of the silver paste box.
[0006] To achieve the above objectives, the technical solution adopted in this application is:
[0007] In a first aspect, a silver paste box is provided, comprising: a box base having a accommodating cavity, a sealed inner cover connected to the box base, and an outer box cover connected to the box base, the box base having an open end, the open end being provided with an opening connected to the accommodating cavity, the outer box cover having a positioning cavity and a cavity bottom of the positioning cavity being provided with an abutting surface, the sealed inner cover being provided at the opening, the outer box cover being outermostly provided at the opening end, and the abutting surface abuts and presses the edge of the sealed inner cover toward the box base.
[0008] In some embodiments, the abutting surface extends around the circumference of the outer cover of the box body, and the abutting surface is arranged in an annular surface.
[0009] In some embodiments, the abutting surface is located at the connection between the cavity wall of the positioning cavity and the cavity bottom of the positioning cavity, and an angle is formed between the abutting surface and the plane defined by the cavity bottom of the accommodating cavity.
[0010] In some embodiments, the sealing inner cover includes a positioning ring and an inner cover body connected to the positioning ring, the inner cover body protrudes toward the accommodating cavity and forms an operating cavity, the positioning ring is arranged at the edge of the opening, and the abutting surface abuts the ring edge of the positioning ring.
[0011] In some embodiments, a support plate is further provided on the edge of the positioning ring.
[0012] In some embodiments, an inner wall of the operating cavity is provided with anti-slip strips, and a plurality of the anti-slip strips are arranged at intervals along the circumference of the inner cover body.
[0013] In some embodiments, the cross-sectional area of the box base is gradually reduced along the direction from the opening to the bottom of the accommodating cavity.
[0014] In some embodiments, a limiting ring is provided at the open end of the box base, and the outer cover of the box body abuts against the limiting ring.
[0015] In some embodiments, the open end is provided with an external thread, the inner wall of the positioning cavity is provided with an internal thread adapted to the external thread, and the outer cover of the box body is screwed to the open end.
[0016] In a second aspect, a centrifugal device is provided, which includes the silver paste box, and the centrifugal device also includes a centrifuge for placing the silver paste box.
[0017] The beneficial effects of this application are:
[0018] The silver paste box includes a box base, an outer box cover and a sealed inner cover. By arranging an abutment surface in the positioning cavity, when the outer box cover is assembled to the open end, the abutment surface can tightly press the edge of the inner cover, so that a reliable seal is formed between the inner cover and the box base, effectively preventing leakage of the silver paste box due to loose sealing during high temperature or centrifugation, and improving the sealing performance of the silver paste box. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0020] Figure 1 Schematic diagram of the three-dimensional structure of the box base provided in an embodiment of the present application;
[0021] Figure 2 yes Figure 1 A front view schematic diagram of the box base;
[0022] Figure 3 yes Figure 2 A schematic cross-sectional view of the box base along the AA direction;
[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the outer cover of the box provided in another embodiment of the present application;
[0024] Figure 5 yes Figure 4 A schematic cross-sectional view of the outer cover of the box;
[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of a sealed inner cover provided in yet another embodiment of the present application;
[0026] Figure 7 yes Figure 6 A schematic top view of the sealed inner cover;
[0027] Figure 8 yes Figure 7 A schematic cross-sectional view of the sealed inner cover along direction BB.
[0028] Among them, the reference numerals in the figures are:
[0029] 100, box base; 101, opening end; 104, opening; 102, sealing end; 103, limiting ring; 200, box outer cover; 201, abutment surface; 202, positioning cavity; 300, sealed inner cover; 301, inner cover body; 302, positioning ring; 303, support plate; 304, anti-slip strip; 305, operating cavity; DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0031] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.
[0032] See also Figures 1 to 8 The embodiment of the present application provides a silver paste box and a centrifugal device having the same. The silver paste box can be used to store silver paste, and the centrifugal device can centrifugally process the silver paste in the silver paste box.
[0033] See also Figure 3 、 Figure 4 and Figure 6 The silver paste box includes: a box base 100 having a receiving cavity, a sealed inner cover 300 connected to the box base 100, and an outer cover 200 connected to the box base 100. Silver paste can be stored in the receiving cavity. The box base 100 has an open end 101, and the open end 101 is provided with an opening 104 connected to the receiving cavity. The outer cover 200 has a positioning cavity 202, and the bottom of the positioning cavity 202 is provided with an abutting surface 201. The abutting surface 201 is protruding from the inner wall of the positioning cavity 202. The sealed inner cover 300 is sealed and is provided on the opening 104 to prevent the silver paste in the receiving cavity from leaking out of the opening 104. The outer cover 200 is placed outside the open end 101, and the abutting surface 201 abuts and presses the edge of the sealed inner cover 300 toward the box base 100.
[0034] See also Figure 3 、 Figure 4 and Figure 6 The silver paste box provided in the embodiment of the present application has an abutment surface 201 set in the positioning cavity 202. When the outer cover 200 of the box body is assembled to the open end 101, the abutment surface 201 can tightly press the edge of the inner cover, so that a reliable seal is formed between the inner cover and the box body base 100, effectively preventing leakage of the silver paste box due to loose sealing during high temperature or centrifugation, and improving the sealing performance of the silver paste box.
[0035] See also Figure 3 、 Figure 4 and Figure 6 Alternatively, exposure of silver paste to air or contaminants can affect its sintering quality and electrical properties. A tightly sealed silver paste box can effectively isolate air and contaminants, ensuring the purity of the silver paste during storage and use, thereby improving electrical and thermal conductivity after sintering.
[0036] See also Figure 3 、 Figure 4 and Figure 6 Optionally, nano-sintered silver paste often needs to be centrifuged at high speed during processing to prevent the silver paste box from leaking due to loosening of the outer cover 200 of the box body or poor sealing between the sealed inner cover 300 and the box base 100 during centrifugation. The silver paste box provided in the present application can ensure that it can remain tightly sealed under high-speed centrifugation, thereby preventing the silver paste from leaking under the action of centrifugal force.
[0037] In some embodiments, the abutting surface 201 extends around the circumference of the outer cover 200 , and the abutting surface 201 is arranged in an annular surface.
[0038] See also Figure 3 、 Figure 4 and Figure 6 Optionally, the abutment surface 201 is disposed around the circumference of the outer cover 200, ensuring that the entire edge of the sealed inner cover 300 is evenly stressed when the outer cover 200 is tightly closed over the opening 101. The annular contact surface provides a more uniform pressing force, effectively improving the sealing effect, and significantly reducing the risk of localized seal failure, particularly in scenarios where centrifugal force or other mechanical vibrations are present.
[0039] Optionally, the annular abutment surface 201 reduces the possible gap between the box base 100 and the sealed inner cover 300, thereby improving the overall stability of the silver paste box and preventing the sealing performance from being degraded during long-term use.
[0040] See also Figure 3 、 Figure 4 and Figure 6 In some embodiments, the abutting surface 201 is located at the connection between the cavity wall of the positioning cavity 202 and the cavity bottom of the positioning cavity 202, and the abutting surface 201 and the plane determined by the cavity bottom of the accommodating cavity have an angle.
[0041] The angle can range from 30 to 60 degrees, such as 30 degrees, 35 degrees, 40 degrees, 46 degrees, 55 degrees or 60 degrees. The angle in this application is 45 degrees. In other embodiments, it can be selected according to actual conditions and is not limited here.
[0042] See also Figure 3 、 Figure 4 and Figure 6 Optionally, the abutment surface 201 is located at the junction of the cavity wall and the cavity bottom of the positioning cavity 202. This can better utilize the structural characteristics of the positioning cavity 202, so that the abutment surface 201 does not affect the use of the outer box cover 200 and can also prevent the silver paste from leaking. The abutment between the abutment surface 201 and the edge of the sealed inner cover 300 can minimize the entry of air or impurities into the accommodating cavity, while ensuring that the sealed inner cover 300 always maintains a stable and close contact state under different operating environments (such as high temperature and centrifugation).
[0043] It can also effectively enhance the overall compressive resistance of the silver paste box, so that the box base 100, the sealed inner cover 300 and the box outer cover 200 are connected as one. During the centrifugation process, the abutment surface 201 can reduce the deformation of the sealing surface caused by centrifugal force, ensuring that the silver paste will not leak due to deformation of the outer cover under high-speed operation.
[0044] See also Figures 6 to 8 In some embodiments, the sealing inner cover 300 includes a positioning ring 302 and an inner cover body 301 connected to the positioning ring 302, the inner cover body 301 protrudes toward the accommodating cavity and forms an operating cavity 305, the positioning ring 302 is arranged at the edge of the opening 104, and the abutting surface 201 abuts against the ring edge of the positioning ring 302.
[0045] See also Figures 6 to 8 Optionally, the inner cover body 301 protrudes toward the accommodating cavity, thereby improving the sealing of the inner cover body 301 to the opening 104, ensuring that the sealed inner cover 300 will not shift due to vibration during the centrifugal process, preventing the silver paste from leaking from the opening 104, thereby further improving the sealing effect of the silver paste box.
[0046] The positioning ring 302 can accurately position and install the inner cover body 301 at the opening 104 so that it fits tightly with the box base 100 , which not only helps to improve the convenience of operation but also increases the stability of the sealed inner cover 300 .
[0047] The setting of the operating cavity 305 improves the user's convenience in loading and unloading the silver paste box, especially when the box cover needs to be opened or closed quickly, and can effectively avoid misoperation or failure due to slipping hands.
[0048] See also Figures 6 to 8 In some embodiments, a support plate 303 is further provided on the edge of the positioning ring 302 .
[0049] Optionally, two support plates 303 are arranged at intervals. By operating the support plates 303 , a person can quickly open the accommodating cavity by hand, thereby improving the convenience of operation.
[0050] See also Figures 6 to 8 In some embodiments, the inner wall of the operating cavity 305 is arranged with an anti-slip strip 304 , and a plurality of the anti-slip strips 304 are arranged at intervals along the circumference of the inner cover body 301 .
[0051] Optionally, anti-slip strips 304 are arranged on the inner wall of the inner lid operating cavity 305. These strips 304 can improve the user's grip stability when operating the silver paste box, especially in high-intensity working environments, and reduce operational errors caused by slippery hands. The spaced arrangement of the anti-slip strips 304 effectively improves operational precision, ensuring smooth installation and removal of the sealed inner lid 300, and avoiding the risk of silver paste storage or leakage due to improper operation.
[0052] See also Figures 1 to 3 In some embodiments, the cross-sectional area of the box base 100 is gradually reduced along the direction from the opening 104 to the bottom of the accommodating cavity.
[0053] See also Figures 1 to 3 Optionally, the box base 100 is cylindrical and further has a sealing end 102 arranged opposite to the open end 101. The outer diameter of the box base 100 gradually decreases in the direction from the open end 101 to the sealing end 102, that is, a generatrix on the outer wall of the box base 100 has an angle with the plane determined by the bottom of the accommodating cavity, so that the open end 101 of the box base 100 is larger than the sealing end 102 of the box base 100, thereby enabling the silver paste box to be more stably distributed in the centrifuge, reducing shaking during centrifugation, and helping to avoid movement or leakage of the silver paste during centrifugation.
[0054] It is understandable that the centrifuge is provided with positioning holes for fixing the box base 100 , and the shape of the positioning holes matches the shape of the box base 100 , so that the box base 100 can remain stable during the centrifugation process.
[0055] See also Figures 1 to 3 In some embodiments, a limiting ring 103 is provided at the open end 101 of the box base 100 , and the outer cover 200 abuts against the limiting ring 103 .
[0056] Optionally, the provision of a retaining ring 103 ensures that the outer cover 200 does not damage the sealing structure due to overtightening, and also prevents the outer cover 200 from loosening due to insufficient tightening, thereby enhancing the sealing reliability of the silver paste box. The presence of the retaining ring 103 effectively improves the fault tolerance of operation and reduces the risk of silver paste leakage due to improper operation.
[0057] See also Figures 1 to 3The limiting ring 103 can also provide additional support for the outer cover 200 of the box body. When subjected to external vibration or impact, the limiting ring 103 can effectively buffer and prevent the structural failure of the sealed inner cover 300 and the outer cover 200 of the box body.
[0058] See also Figures 1 to 3 In some embodiments, the open end 101 is provided with external threads, see Figures 4 and 5 The inner wall of the positioning cavity 202 is provided with an internal thread adapted to the external thread, and the outer cover 200 of the box body is screwed to the open end 101.
[0059] See also Figures 1 to 3 Optionally, a screw lock structure of external and internal threads can ensure that the outer cover 200 fits tightly with the box base 100. The threaded connection can improve the reliability of the connection between the box base 100 and the outer cover 200, ensuring that the silver paste will not be affected by the external environment during the sealing process.
[0060] The threaded structure ensures the double sealing design of the silver paste box, so that it can still maintain excellent sealing performance under high temperature and high speed working environment, and adapt to various harsh application environments.
[0061] The present invention also proposes a centrifugal device, which includes a silver paste box. The specific structure of the silver paste box refers to the above embodiment. Since the present centrifugal device adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0062] See also Figures 1 to 3 In some embodiments, the centrifugal device further comprises a centrifuge for placing the silver paste box. The centrifuge is used to centrifuge the silver paste in the silver paste box, which can improve the sealing performance of the silver paste.
[0063] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.
Claims
1. A silver paste box, characterized in that: include: A box body base having a accommodating cavity, a sealed inner cover connected to the box body base, and a box body outer cover connected to the box body base, the box body base having an open end, the open end having an opening connected to the accommodating cavity, the box body outer cover having a positioning cavity and a cavity bottom of the positioning cavity being provided with an abutting surface, the sealed inner cover sealing cover is provided on the opening, the box body outer cover is outermostly placed on the open end, and the abutting surface abuts and presses the edge of the sealed inner cover toward the box body base.
2. The silver paste box according to claim 1, characterized in that: The abutting surface extends around the circumference of the outer cover of the box body, and the abutting surface is arranged in an annular surface.
3. The silver paste box according to claim 1, wherein: The abutting surface is located at the connection between the cavity wall of the positioning cavity and the cavity bottom of the positioning cavity, and an angle is formed between the abutting surface and the plane defined by the cavity bottom of the accommodating cavity.
4. The silver paste box according to any one of claims 1 to 3, characterized in that: The sealing inner cover includes a positioning ring and an inner cover body connected to the positioning ring. The inner cover body protrudes toward the accommodating cavity and forms an operating cavity. The positioning ring is arranged at the edge of the opening, and the abutting surface abuts the ring edge of the positioning ring.
5. The silver paste box according to claim 4, characterized in that: A supporting plate is also provided on the edge of the positioning ring.
6. The silver paste box according to claim 4, characterized in that: The inner wall of the operating cavity is provided with anti-slip strips, and a plurality of the anti-slip strips are arranged at intervals along the circumference of the inner cover body.
7. The silver paste box according to any one of claims 1 to 3, characterized in that: The cross-sectional area of the box body base is gradually reduced along the direction from the opening to the bottom of the accommodating cavity.
8. The silver paste box according to any one of claims 1 to 3, characterized in that: A limiting ring is provided at the open end of the box body base, and the outer cover of the box body abuts against the limiting ring.
9. The silver paste box according to any one of claims 1 to 3, characterized in that: The open end is provided with an external thread, the inner wall of the positioning cavity is provided with an internal thread adapted to the external thread, and the outer cover of the box body is screwed to the open end.
10. A centrifugal device, characterized in that: It comprises the silver paste box as described in any one of claims 1-9, and the centrifugal device also includes a centrifuge for placing the silver paste box.