Sintering support for copper pole sintering

Abstract

The utility model discloses a copper pole sintering bearing support which comprises a body, the body comprises an inner bearing layer, an outer supporting layer and a middle layer, the inner bearing layer is in a net shape and used for being in contact with a loaded product, the outer supporting layer is in a net shape, the middle layer is located between the inner bearing layer and the outer supporting layer, and the middle layer is used for absorbing oxygen and reducing gas in a sintering furnace. And the middle layer is foamy copper or a copper net. According to the copper pole sintering bearing support, oxygen and reducing gas can be absorbed when a copper pole is sintered, the reducing gas can be absorbed at the front stage of sintering, the adhesive force of the copper pole is improved, and oxygen is absorbed at the rear stage of sintering, so that the oxygen content in the sintering atmosphere in a sintering furnace can be properly widened, the usage amount of nitrogen is reduced, and the requirement for the purity of the nitrogen is lowered; the sintering process difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of copper pole sintering tools, in particular to a copper pole sintering support. Background Art

[0002] In the production of electronic components, copper paste is used to stick the product and then sinter it at high temperature to form a copper pole.

[0003] In the related art, the copper paste will be debinded and sintered in the sintering furnace. The reducing atmosphere generated by debinding is not conducive to the adhesion of the copper pole sintering, and the sintering atmosphere requires the oxygen content to be as low as possible. Nitrogen needs to be flushed into the sintering furnace to expel the oxygen in the sintering furnace.

[0004] At present, the media for sintering products are diverse, such as steel screens, nickel meshes, ceramic frames, titanium meshes, etc.

[0005] However, the existing sintering medium simply serves to support the product for burning, but cannot effectively improve the entire sintering process, so that the sintering furnace has high requirements for nitrogen purity and large gas volume when in use to ensure that the sintering furnace excludes external oxygen and prevents external oxygen from entering the sintering furnace. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a copper electrode sintering support, which can absorb oxygen and reducing gas during copper electrode sintering, can absorb reducing gas in the front stage of sintering to improve the adhesion of the copper electrode, and absorb oxygen in the back stage of sintering, so that the oxygen content in the sintering atmosphere in the sintering furnace can be appropriately relaxed, reducing the amount of nitrogen used and the purity requirements of nitrogen, and reducing the difficulty of the sintering process.

[0007] According to the first aspect of the utility model, a copper pole sintering support tray comprises a main body, wherein the main body comprises an inner supporting layer, an outer supporting layer and an intermediate layer, wherein the inner supporting layer is in a mesh shape and is used for contacting and loading products, the outer supporting layer is in a mesh shape, the intermediate layer is located between the inner supporting layer and the outer supporting layer, the intermediate layer is used for absorbing oxygen and reducing gas in a sintering furnace, and the intermediate layer is configured as foam copper or a copper mesh.

[0008] A copper pole sintering support according to an embodiment of the utility model has at least the following beneficial effects:

[0009] 1. The utility model arranges an inner supporting layer, an outer supporting layer and an intermediate layer, wherein the intermediate layer is located between the inner supporting layer and the outer supporting layer, and is used for absorbing oxygen and reducing gas in the sintering furnace. The intermediate layer is arranged as foam copper or copper mesh, so that in the copper electrode sintering process, the intermediate layer can absorb the reducing gas generated by the copper paddle debinding in the front stage of sintering to improve the adhesion of the copper electrode, and the intermediate layer can absorb oxygen in the rear stage of sintering, so that the oxygen content in the sintering atmosphere in the sintering furnace can be appropriately relaxed, thereby reducing the usage of nitrogen and the requirement for nitrogen purity, and reducing the difficulty of the sintering process. In addition, the foam copper and the copper mesh have a large specific surface area, so that the foam copper or the copper mesh has a relatively large oxygen and reducing gas absorption area, and the oxygen and reducing gas absorption efficiency is high, and the reducing gas and oxygen in the sintering furnace can be quickly absorbed.

[0010] It needs to be explained that during the sintering process of copper electrodes, the copper foam or copper mesh absorbs oxygen and reacts into copper oxide after being heated, thereby allowing the copper foam or copper mesh to absorb oxygen. In addition, the reducing atmosphere of the sintering furnace contains flue gas, carbon monoxide, or small organic molecules such as formaldehyde, methane, etc., which will have a great impact on the adhesion of the copper electrode. After being heated, copper oxide absorbs carbon monoxide and reacts into copper and carbon dioxide, thereby allowing the copper foam and copper mesh to cyclically absorb oxygen and reducing gas.

[0011] 2. The utility model sets the inner supporting layer in a mesh shape, and the inner supporting layer is used to contact and load the product. On the one hand, the contact between the inner supporting layer and the product can block the contact between the copper pole of the product and the middle layer, avoid adhesion between the copper pole of the product and the middle layer, and protect the foam copper in the middle layer. On the other hand, the mesh inner supporting layer can increase the air permeability of the inner supporting layer, so that the oxygen and reducing gas in the sintering furnace can pass through the mesh holes of the inner supporting layer into the space between the inner supporting layer and the outer supporting layer and be absorbed by the middle layer, thereby ensuring the oxygen and reducing gas absorption effect of the middle layer. Furthermore, the inner supporting layer has supporting strength, which can enhance the structural strength of the main body and reduce the risk of deformation of the main body.

[0012] 3. The utility model sets the outer supporting layer in a mesh shape. Thus, on the one hand, the mesh outer supporting layer can increase the air permeability of the outer supporting layer, so that the oxygen and reducing gas in the sintering furnace can pass through the mesh holes of the outer supporting layer into the space between the inner supporting layer and the outer supporting layer and be absorbed by the middle layer, thereby ensuring the oxygen and reducing gas absorption effect of the middle layer. On the other hand, the outer supporting layer has supporting strength, which can increase the structural strength of the main body and reduce the risk of deformation of the main body.

[0013] According to some embodiments of the present invention, the intermediate layer is configured as foam copper.

[0014] According to some embodiments of the present invention, the inner supporting layer is configured as a copper mesh, and the outer supporting layer is configured as a steel mesh.

[0015] According to some embodiments of the present invention, the intermediate layer is configured as a copper mesh.

[0016] According to some embodiments of the present invention, the main body includes multiple layers of copper mesh, at least one layer of the copper mesh is used to form the inner supporting layer, and at least one layer of the copper mesh is used to form the middle layer.

[0017] According to some embodiments of the present invention, the inner supporting layer is configured as a temperature-resistant mesh.

[0018] According to some embodiments of the present invention, the outer supporting layer is configured as a temperature-resistant mesh.

[0019] According to some embodiments of the present invention, the top of the body is open.

[0020] According to some embodiments of the utility model, the main body is frame-shaped, the middle layer includes a bottom wall and side walls vertically arranged around the bottom wall, and the inner receiving layer and the outer supporting layer are respectively coated on the inner and outer sides of the bottom wall and the side walls.

[0021] According to some embodiments of the present invention, the body is square.

[0022] According to some embodiments of the present invention, the bottom wall and the side wall are integrally connected.

[0023] According to some embodiments of the present invention, the inner receiving layer and the outer supporting layer are connected at the top edge of the side wall.

[0024] According to some embodiments of the present invention, a support frame is provided on the top edge of the side wall, and the inner receiving layer and the outer support layer are covered outside the support frame.

[0025] According to some embodiments of the present invention, the support frame is four round rods connected end to end.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic structural diagram of a copper electrode sintering support tray according to an embodiment of the utility model;

[0029] Figure 2 for Figure 1 An exploded view of the parts shown;

[0030] Figure 3 for Figure 1 A top view is shown;

[0031] Figure 4 for Figure 3 AA cross-sectional view is shown.

[0032] Reference numerals: 100 - main body, 110 - inner receiving layer, 120 - outer supporting layer, 130 - middle layer, 140 - bottom wall, 150 - side wall, 160 - supporting frame. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the 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, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] A copper pole sintering support according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A copper pole sintering support according to an embodiment of the utility model includes a main body 100 . Specifically, the main body 100 includes an inner receiving layer 110 , an outer supporting layer 120 and an intermediate layer 130 .

[0039] The inner supporting layer 110 is in a mesh shape and is used for contacting the loaded products.

[0040] It can be understood that, on the one hand, the contact between the inner supporting layer 110 and the product can prevent the copper pole of the product from contacting the middle layer 130, avoid adhesion between the copper pole of the product and the middle layer 130, and protect the foam copper of the middle layer 130; on the other hand, the mesh inner supporting layer 110 can increase the air permeability of the inner supporting layer 110, so that the oxygen and reducing gas in the sintering furnace can pass through the mesh holes of the inner supporting layer 110 into the space between the inner supporting layer 110 and the outer supporting layer and be absorbed by the middle layer 130, thereby ensuring the oxygen and reducing gas absorption effect of the middle layer 130; furthermore, the inner supporting layer 110 has supporting strength, which can enhance the structural strength of the main body 100 and reduce the risk of deformation of the main body 100.

[0041] In some specific embodiments, the inner supporting layer 110 is configured as a temperature-resistant mesh, so that the inner supporting layer 110 can withstand the high temperature environment during sintering in a sintering furnace and prevent the inner supporting layer 110 from melting.

[0042] Specifically, the inner supporting layer 110 can be set to be a steel mesh, a copper mesh, a nickel mesh, a titanium mesh, a ceramic mesh, etc., so that the inner supporting layer 110 is made of conventional materials and has low manufacturing difficulty.

[0043] As for the outer supporting layer 120 , the outer supporting layer 120 is in a mesh shape.

[0044] It can be understood that, on the one hand, the mesh outer support layer 120 can increase the air permeability of the outer support layer 120, so that the oxygen and reducing gas in the sintering furnace can pass through the mesh holes of the outer support layer 120 into the space between the inner supporting layer 110 and the outer support layer 120 and be absorbed by the middle layer 130, thereby ensuring the oxygen and reducing gas absorption effect of the middle layer 130. On the other hand, the outer support layer 120 has supporting strength, which can increase the structural strength of the main body 100 and reduce the risk of deformation of the main body 100.

[0045] In some specific embodiments, the outer support layer 120 is configured as a temperature-resistant mesh, so that the outer support layer 120 can withstand the high temperature environment during sintering in the sintering furnace and prevent the outer support layer 120 from melting.

[0046] Specifically, the outer support layer 120 can be set to be a steel mesh, a copper mesh, a nickel mesh, a titanium mesh or a ceramic mesh, etc., so that the outer support layer 120 is made of conventional materials and has low manufacturing difficulty.

[0047] The middle layer 130 is located between the inner supporting layer 110 and the outer supporting layer 120 . The middle layer 130 is used to absorb oxygen and reducing gas in the sintering furnace. The middle layer 130 is configured to be foamed copper or a copper mesh.

[0048] It can be understood that during the copper electrode sintering process, the intermediate layer 130 can absorb the reducing gas generated by the copper paddle debinding in the early stage of sintering to improve the adhesion of the copper electrode. The intermediate layer 130 can absorb oxygen in the later stage of sintering, so that the oxygen content in the sintering atmosphere in the sintering furnace can be appropriately relaxed, thereby reducing the amount of nitrogen used and the requirement for nitrogen purity, and reducing the difficulty of the sintering process. In addition, the foam copper and copper mesh have a large specific surface area, so that the foam copper or copper mesh has a relatively large oxygen and reducing gas absorption area, and the oxygen and reducing gas absorption efficiency is high, and it can quickly absorb the reducing gas and oxygen in the sintering furnace.

[0049] It needs to be explained that during the sintering process of copper electrodes, the copper foam or copper mesh absorbs oxygen and reacts into copper oxide after being heated, thereby allowing the copper foam or copper mesh to absorb oxygen. In addition, the reducing atmosphere of the sintering furnace contains flue gas, carbon monoxide, or small organic molecules such as formaldehyde, methane, etc., which will have a great impact on the adhesion of the copper electrode. After being heated, copper oxide absorbs carbon monoxide and reacts into copper and carbon dioxide, thereby allowing the copper foam and copper mesh to cyclically absorb oxygen and reducing gas.

[0050] In some specific embodiments, the middle layer 130 is configured as foam copper, so that the foam copper has a large specific surface area, a high absorption efficiency for oxygen and reducing gas, and a good effect of absorbing oxygen and reducing gas.

[0051] It needs to be explained that specific surface area refers to the total area per unit mass of material, which is divided into two categories: external surface area and internal surface area. Porous and porous materials have external surface area and internal surface area.

[0052] In some specific embodiments, the inner supporting layer 110 is set to a copper mesh, and the outer supporting layer 120 is set to a steel mesh. Therefore, the inner supporting layer 110 can absorb oxygen and reducing gas while protecting the foam copper, thereby improving the oxygen absorption efficiency and reducing gas absorption efficiency of the main body 100. In addition, the outer supporting layer 120 is set to a steel mesh. The steel mesh has a relatively high hardness and can better support the main body 100, thereby reducing the risk of deformation of the main body 100.

[0053] In other embodiments, the middle layer 130 is configured as a copper mesh, so that the middle layer 130 is made of conventional materials and is easy to manufacture.

[0054] In order to further increase the specific surface area of ​​the intermediate layer 130 and improve the absorption efficiency of the intermediate layer 130 for oxygen and reducing gas, the intermediate layer 130 may be made of a multi-layer copper mesh with a high mesh count.

[0055] In some specific embodiments, the main body 100 includes multiple layers of copper mesh, at least one layer of the copper mesh is used to form the inner supporting layer 110, and at least one layer of the copper mesh is used to form the intermediate layer 130, so that the inner supporting layer 110 can also absorb oxygen and reducing gas, further improving the oxygen absorption efficiency and reducing gas absorption efficiency of the main body 100.

[0056] In some specific embodiments, the main body 100 is frame-shaped, the middle layer 130 includes a bottom wall 140 and a side wall 150 vertically arranged around the bottom wall 140, and the inner supporting layer 110 and the outer supporting layer 120 are respectively wrapped around the inner and outer sides of the bottom wall 140 and the side wall 150, so that the middle layer 130 can be distributed on the entire unfolded surface of the main body 100, thereby further increasing the oxygen and reducing gas absorption area of ​​the middle layer 130.

[0057] In some specific embodiments, the top of the body 100 is open, so that it is convenient to take products from the top of the body 100 .

[0058] Furthermore, a frame cover is provided on the top of the main body 100, and the cross-sectional structure of the frame cover is the same as the cross-sectional structure of the main body 100, so that the support tray forms a relatively closed space, so that the oxygen and reducing gas absorption efficiency of the support tray in all directions of the product is uniform.

[0059] In some specific embodiments, the bottom wall 140 and the side wall 150 are integrally connected, thereby making the connection of the bottom wall 140 more secure.

[0060] In some specific embodiments, the main body 100 is square, so that the main body 100 has a square appearance and is easy to manufacture.

[0061] In other embodiments, the body may also be round or barrel-shaped.

[0062] In some specific embodiments, the inner supporting layer 110 and the outer supporting layer 120 are connected at the top edge of the side wall 150 , so that the inner supporting layer 110 and the outer supporting layer 120 cover the middle layer 130 more firmly.

[0063] In some specific embodiments, a support frame 160 is provided at the top edge of the side wall 150, and the inner supporting layer 110 and the outer supporting layer 120 are covered on the outside of the support frame 160, so that the support frame 160 can support the top edge of the side wall 150, making the structure of the main body 100 more stable and not easy to deform.

[0064] Furthermore, the support frame 160 is composed of four round rods connected end to end, so that the inner receiving layer 110 and the outer support layer 120 can be more easily attached to the support frame 160 .

[0065] In other embodiments, the main body 100 may also be configured as a flat structure, thereby making the structural shape of the main body 100 simple and easy to manufacture. In addition, after the main body 100 is loaded with a product, another main body 100 may be stacked on top of the product to form a multi-layer stacking structure.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A copper electrode sintering support, characterized in that: The invention comprises a main body (100), wherein the main body (100) comprises an inner supporting layer (110), an outer supporting layer (120) and an intermediate layer (130), wherein the inner supporting layer (110) is in a mesh shape and is used for contacting and loading products, the outer supporting layer (120) is in a mesh shape, the intermediate layer (130) is located between the inner supporting layer (110) and the outer supporting layer (120), the intermediate layer (130) is used for absorbing oxygen and reducing gas in a sintering furnace, and the intermediate layer (130) is configured as foam copper or a copper mesh.

2. A copper electrode sintering support according to claim 1, characterized in that: The intermediate layer (130) is configured as foam copper.

3. A copper electrode sintering support according to claim 2, characterized in that: The inner receiving layer (110) is configured as a copper mesh, and the outer supporting layer (120) is configured as a steel mesh.

4. The copper electrode sintering support according to claim 1, characterized in that: The intermediate layer (130) is configured as a copper mesh.

5. The copper electrode sintering support according to claim 1, characterized in that: The body (100) comprises multiple layers of copper mesh, at least one layer of the copper mesh is used to form the inner supporting layer (110), and at least one layer of the copper mesh is used to form the intermediate layer (130).

6. The copper electrode sintering support according to claim 1, characterized in that: The inner supporting layer (110) is configured as a temperature-resistant mesh.

7. The copper electrode sintering support according to claim 1, characterized in that: The outer supporting layer (120) is configured as a temperature-resistant mesh.

8. The copper electrode sintering support according to claim 1, characterized in that: The main body (100) is frame-shaped, the middle layer (130) comprises a bottom wall (140) and a side wall (150) vertically arranged around the bottom wall (140), and the inner receiving layer (110) and the outer supporting layer (120) are respectively covered on the inner side and the outer side of the bottom wall (140) and the side wall (150).

9. A copper electrode sintering support according to claim 8, characterized in that: The bottom wall (140) and the side wall (150) are integrally connected.

10. A copper electrode sintering support according to claim 9, characterized in that: A support frame (160) is provided at the top edge of the side wall (150), and the inner receiving layer (110) and the outer support layer (120) are covered outside the support frame (160).

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