Anti-oxidation sintering carrier
By designing a sintering vehicle with air inlet and air outlet, the problem of an oxygen-free environment during the sintering process is solved, and a low-cost anti-oxidation effect is achieved.
Patent Information
- Application Number
- CN202422288875.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The prior art is difficult to achieve an oxygen-free environment during the sintering process, resulting in material oxidation.
A sintering vehicle including an upper cover and a bottom bracket is designed, with an air inlet and an air outlet on the bottom bracket for inlet and discharge of protective gas, forming a closed chamber to prevent oxidation.
Through a simple structure, a relatively closed oxygen-free environment is achieved, which prevents material oxidation during sintering, which is low in cost and good effect.
Smart Images
Figure CN223056724U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of semiconductor packaging, and specifically relates to an anti-oxidation sintering carrier. Background Art
[0002] Nano silver is a green and pollution-free material, which has a low sintering temperature and a high melting point, and has many excellent properties such as good electrical conductivity and thermal conductivity. It is an ideal connecting material in the field of high-power electronic packaging. Different from soft soldering and adhesives, nano silver is generally based on a silver powder sintering technology below 300°C. After sintering, it forms densified silver with a melting point of 960°C, which is much higher than the welding temperature and can be sintered repeatedly. It is especially suitable for electronic packaging with high temperature, high density and high power. The sintering process needs to be carried out in an oxygen-free environment to avoid oxidation.
[0003] The information disclosed in this background art section is only intended to enhance the overall understanding of the utility model and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a sintering carrier to solve the problem of oxygen-free environment during sintering.
[0005] To achieve the above purpose, a specific embodiment of the utility model provides an anti-oxidation sintering carrier, which includes an upper cover and a bottom tray. The bottom tray is disposed opposite to the upper cover and is detachably fixed, and a chamber for placing the device to be sintered is formed between the bottom tray and the upper cover. The bottom tray is provided with an air inlet and an air outlet communicating with the chamber. The air inlet is used for connecting an external protective gas, and the gas in the chamber is discharged through the air outlet.
[0006] In one or more embodiments of the utility model, a plurality of fixing holes are formed on the side wall of the bottom tray, and a plurality of indexing pins with the same number and corresponding one-to-one are provided on the upper cover. The indexing pins can be inserted into or disengaged from their corresponding fixing holes.
[0007] In one or more embodiments of the utility model, the upper cover includes a cover plate for covering the surface of the bottom tray and a fixing frame for pressing the edge of the cover plate to the bottom tray. The indexing pins are fixed on the fixing frame, and the chamber is formed between the cover plate and the bottom tray.
[0008] In one or more embodiments of the present utility model, a circular limiting protrusion protrudes from the surface of the bottom tray. The limiting protrusions enclose a placement area for placing the device to be sintered. The cover plate includes a covering portion covering the placement area and the limiting protrusions, and a pressure-receiving portion surrounding the covering portion and fitting to the surface of the bottom tray. The fixing frame presses the pressure-receiving portion against the surface of the bottom tray outside the limiting protrusions.
[0009] In one or more embodiments of the present utility model, the air inlet and the air outlet are respectively communicated with opposite ends inside the placement area.
[0010] In one or more embodiments of the present utility model, the fixing frame is provided with a gripping portion for grasping.
[0011] In one or more embodiments of the present utility model, a handle for hand-holding is further provided on the side wall of the bottom tray.
[0012] In one or more embodiments of the present utility model, a rubber sleeve is fixed to the end of the handle away from the bottom tray.
[0013] In one or more embodiments of the present utility model, the bottom tray and the handle are integrally formed or detachably fixed.
[0014] In one or more embodiments of the present utility model, the handle, the air inlet, and the air outlet are provided on the same side wall of the bottom tray.
[0015] Compared with the prior art, the sintering carrier of the present utility model has a low manufacturing cost. A relatively airtight environment can be achieved through a simple structure. After introducing nitrogen or other inert gases, an oxygen-free environment can be achieved, thereby preventing material oxidation during the sintering process. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 It is a schematic diagram of a sintering carrier in an embodiment of the present utility model;
[0018] Figure 2 It is an exploded view of a sintering carrier in an embodiment of the present utility model;
[0019] Figure 3 It is a cross-sectional view of a sintering carrier in an embodiment of the present utility model;
[0020] Figure 4 is Figure 3 a partially enlarged view of
[0021] Description of main reference numerals:
[0022] 100 - sintering carrier, 10 - upper cover, 11 - indexing pin, 12 - cover plate, 121 - covering portion, 122 - pressed portion, 13 - fixed frame, 131 - gripping portion, 20 - bottom tray, 21 - air inlet, 22 - air outlet, 23 - fixing hole, 24 - limiting projection, 25 - placement area, 26 - handle, 27 - rubber sleeve, 30 - device to be sintered, 40 - chamber. Detailed implementation manners
[0023] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0024] As Figures 1-4 shown, the sintering carrier 100 in an embodiment of the present utility model includes an upper cover 10 and a bottom tray 20, which are detachably fixed. The upper cover 10 can be buckled onto the bottom tray 20, and a sealed chamber 40 for placing the device to be sintered 30 is formed therebetween. The bottom tray 20 is provided with an air inlet 21 and an air outlet 22 communicating with the chamber 40, which are used to introduce nitrogen or other inert gases during the sintering process and discharge the gas in the chamber 40 through the air outlet 22, so as to create an anaerobic environment and avoid oxidation during sintering.
[0025] After placing the device to be sintered on the bottom tray 20 in this embodiment and fixing the upper cover 10, a relatively sealed environment can be achieved. It has advantages such as simple structure and low manufacturing cost.
[0026] In one embodiment, a plurality of fixing holes 23 are formed on the side wall of the bottom tray 20, and a plurality of indexing pins 11 are provided on the upper cover 10, and the number of the indexing pins 11 is the same as that of the fixing holes 23 and they correspond to each other one by one. After covering the upper cover 10 on the bottom tray 20, inserting the indexing pins 11 into the corresponding fixing holes 23 can fix the upper cover 10 and the bottom tray 20.
[0027] Specifically, the indexing pin 11 can be a bolt, and a hole is formed on the upper cover 10 to pre - fix it. The fixing hole 23 is a threaded hole. Rotating the indexing pin 11 can screw it into the fixing hole 23 to achieve fixation, and reversing the indexing pin 11 can screw it out of the fixing hole 23.
[0028] As shown Figure 2 in the figure, indexing pins 11 are distributed on both sides of the upper cover 10, and corresponding fixing holes 23 are distributed on both sides of the bottom support 20, so as to form a plurality of fixing positions between the upper cover 10 and the bottom support 20, improve the fixing effect, and prevent gas leakage.
[0029] Preferably, the upper cover 10 includes a cover plate 12 and a fixing frame 13. The former is used to cover the surface of the bottom support 20, and the latter surrounds the edge of the cover plate 12 and presses the cover plate 12 onto the bottom support 20. A chamber 40 is formed between the cover plate 12 and the bottom support 20, and the indexing pins 11 are fixed on the fixing frame 13. As shown Figure 1 in the embodiment, the bottom support 20 and the cover plate 12 are in a rectangular plate structure, and the fixing frame 13 is in a square frame structure. Of course, the bottom support 20 and the cover plate 12 can also be designed into a disc shape or other shapes, and this embodiment does not limit.
[0030] In one embodiment, an annular limiting protrusion 24 protrudes from the surface of the bottom support 20, and a placement area 25 surrounded by it is used to place the device 30 to be sintered. Correspondingly, the cover plate 12 includes a covering portion 121 for covering the placement area 25 and the limiting protrusion 24, and a pressing portion 122 that surrounds the covering portion 121 and extends along the outer side wall of the limiting protrusion 24 towards the surface of the bottom support 20 on its periphery. The placement area 25 and the covering portion 121 form the chamber 40, and the pressing portion 122 fits on the surface of the bottom support 20 outside the limiting protrusion 24. The fixing frame 13 acts on the pressing portion 122 and presses the pressing portion 122 on the surface of the bottom support 20 to achieve the fixation of the upper cover 12 and the sealing of the chamber 40.
[0031] As shown Figure 4 in the figure, since the component 30 to be measured is placed between the limiting protrusions 24, the fitting part of the cover plate 12 and the bottom support 20 includes the top wall and the outer side wall of the limiting protrusion 24, and a part of the surface of the bottom support 20 surrounding the outside of the limiting protrusion 24, and the sealing performance is good, which can well prevent external air from flowing into the chamber 40.
[0032] Preferably, to improve the fluidity of nitrogen or other inert gases in the chamber 40, the air inlet 21 and the air outlet 22 are respectively communicated to opposite ends in the placement area 25, so that nitrogen or other inert gases flow in from one end of the placement area 25 and flow out from the other end. Such a design enables nitrogen or other inert gases to flow through the entire placement area 25, so that the exhaust effect can be improved, and it can be avoided that the two channel openings are too close to completely evacuate the internal oxygen, and there is still oxygen remaining in the chamber 40, resulting in oxidation still occurring.
[0033] In one embodiment, a gripping portion 131 for an operator to grip is provided on the fixed frame 13. The gripping portion 131 may be a protruding structure protruding from the main body portion of the fixed frame 13. The operator can hold the gripping portion 131 by hand to separate the fixed frame 13 from the base 20.
[0034] Similar to the above-mentioned gripping portion 131, a handle 26 is provided on the side wall of the base 20. The operator can place the sintering carrier 100 into the sintering furnace or take it out of the sintering furnace through the handle 26.
[0035] In one embodiment, the handle 26 and the base 20 are integrally formed. To improve the sintering efficiency, the base 20 is made of a high thermal conductivity material. Since the two are integrally formed, the handle 26 is usually made of the same material as the base 20. Therefore, after sintering, the temperature of the handle 26 is relatively high and it is difficult to directly take it out by hand. Usually, other tools are needed to take it out. Therefore, a rubber sleeve 27 is provided at the distal end of the handle 26 to reduce the temperature of the gripping position and increase the friction force at the same time.
[0036] Of course, the handle 26 and the base 20 can also be designed separately, that is, a hole (not shown in the figure) for fixing the handle 26 is provided on the base 20. After placing the base 20 into the sintering furnace through the handle 26, the handle 26 is removed from the base 20. After sintering is completed, the handle 26 is fixed to the base 20 and taken out of the furnace. Such a setting form makes the handle 26 not participate in the sintering in the furnace, so the temperature will not be too high and it is convenient to take.
[0037] In the embodiment as Figure 2 shown, the handle 26, the air inlet 21 and the air outlet 22 are arranged on the same side wall of the base 20. Of course, the handle 26, the air inlet 21 and the air outlet 22 can be arranged on different sides of the base 20, and this embodiment does not limit this.
[0038] The sintering carrier 100 disclosed in the embodiment of the present utility model can be used for sintering semiconductor materials such as nano silver, and of course can also be applied to sintering of other materials.
[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
[0040] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An oxidation-proof sintering carrier, characterized in that, Comprising: Upper cover; Bottom tray, which is disposed opposite to the upper cover and is detachably fixed, and a chamber for placing the device to be sintered is formed between the bottom tray and the upper cover. The bottom tray is provided with an air inlet and an air outlet communicating with the chamber. The air inlet is used for connecting an external protective gas, and the gas in the chamber is discharged through the air outlet.
2. The anti-oxidation sintering carrier according to claim 1, wherein A plurality of fixing holes are formed in the side wall of the bottom tray, and a plurality of indexing pins with the same number and one-to-one correspondence are provided on the upper cover. The indexing pins can be inserted into or disengaged from their corresponding fixing holes.
3. The anti-oxidation sintering carrier according to claim 2, wherein, The upper cover includes a cover plate for covering the surface of the bottom tray and a fixing frame for pressing the edge of the cover plate to the bottom tray. The indexing pins are fixed on the fixing frame, and the chamber is formed between the cover plate and the bottom tray.
4. The antioxidant sintering carrier according to claim 3, wherein A ring-shaped limiting projection protrudes from the surface of the bottom tray. The limiting projection encloses a placement area for placing the device to be sintered. The cover plate includes a covering portion covering the placement area and the limiting projection, and a pressed portion surrounding the covering portion and fitting to the surface of the bottom tray. The fixing frame presses the pressed portion against the surface of the bottom tray outside the limiting projection.
5. The antioxidant sintering carrier according to claim 4, wherein, The air inlet and the air outlet are respectively communicated with opposite ends in the placement area.
6. The antioxidant sintering carrier according to claim 3, wherein, The fixing frame is provided with a gripping portion for grasping.
7. The oxidation-proof sintering carrier according to claim 1, wherein A handle for hand-holding is further provided on the side wall of the bottom tray.
8. The anti-oxidation sintering carrier according to claim 7, wherein, A rubber sleeve is fixed to the end of the handle away from the bottom tray.
9. The oxidation-proof sintering carrier according to claim 7, wherein The bottom tray and the handle are integrally formed or detachably fixed.
10. The antioxidant sintering carrier according to claim 7, characterized in that, The handle, the air inlet and the air outlet are disposed on the same side wall of the bottom tray.