Double-sided sintering jig for improving dispersive bubbles

Abstract

The utility model provides a double-sided sintering jig for improving dispersive bubbles. The double-sided sintering jig comprises a bottom plate and supporting strips arranged on the two sides of the bottom plate. Through holes with the diameter of 1-50 mm are evenly distributed in the bottom plate. The double-sided sintering jig is simple in structure and reasonable in design, enables a product to be heated uniformly in the sintering process, solves the problem of dispersive bubbles, and is suitable for large-scale popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering fixture technical field especially relates to a double -sided sintering fixture of improvement dispersivity bubble. BACKGROUND

[0002] The currently used double -sided fixture is generally of alumina material, and the bottom is a whole ceramic sheet, and the heat transfer efficiency is relatively slow, and the heat dissipation is also relatively slow, and the product is easy to produce irregular dispersivity bubble.

[0003] CN116387163A discloses a method for improving the sintering bubble defect of a DCB substrate of a thin ceramic sheet, comprising the following steps: step one, two parallel ceramic strips are pasted on the upper sides of the left and right sides of a base plate to form a sintering fixture; notches are formed at the front and rear ends of the base plate; step two, the sintering fixture is placed on a conveyor belt, and the base plate of the sintering fixture contacts the conveyor belt; step three, the ceramic sheet to be sintered and the copper foil are placed on the sintering fixture in sequence, and the thickness of the ceramic sheet is less than 0.38mm; step four, sintering is performed. The base plate is designed to have openings at the front and rear ends, so that the ceramic sheet only contacts the base plate in the middle and only contacts the edge at the lengthwise ends, the contact area is reduced to reduce the influence of the base plate on the sintering of the DCB substrate, the thin ceramic sheet is deformed in a natural deformation state, and the copper suboxide eutectic liquid flows uniformly, thereby reducing the sintering bubble defect. However, the structure of the fixture used is prone to breakage, and the structure is not stable enough, and the breakage of the fixture increases the sintering cost, and the position of the connecting strip and the position of the hollow position are not uniformly heated.

[0004] CN116589297A discloses a method for reducing the sintering bubble of the tail end of a DCB substrate, comprising the following steps: step one, cutting a copper foil of the required size by a copper cutting machine, and the directions of the burrs at the two ends of the lengthwise direction of the cut copper foil are opposite, one end of the burr is inclined upward, and the other end of the burr is inclined downward; the distance between the fixed cutter and the moving cutter of the copper cutting machine is 80um-100um, and the movement speed of the moving cutter is 35mm / s-45mm / s; step two, covering the copper foil on the ceramic, conveying by the conveying belt of the sintering furnace and sintering; one end of the burr inclined upward on the copper foil is located at the front end in the conveying direction of the conveying belt, and the other end of the burr inclined downward on the copper foil is located at the rear end in the conveying direction of the conveying belt.

[0005] CN219511279U discloses a sintering jig for copper-clad ceramic substrate, the copper-clad ceramic substrate comprises a ceramic substrate and a copper layer arranged on at least one surface of the ceramic substrate, the copper layer is connected with the ceramic substrate by heat treatment of a sintering furnace, the sintering jig comprises: first and second bearing plate bodies and a hollow structure arranged oppositely; opposite sides of the sintering jig body are provided with placing grooves, the placing grooves are perpendicular to the first and second bearing plate bodies, the placing grooves comprise first and second side walls, the height of the first side wall is greater than that of the second side wall; a support member is arranged obliquely in the placing groove; when the copper layer is connected with the ceramic substrate, the ceramic substrate is suspended on the sintering jig body, and two surfaces of the ceramic substrate form air diffusion spaces in the sintering furnace respectively. Through the above manner, the heat uniformity of the copper layer is improved, and the bonding strength of the copper layer and the ceramic substrate is improved.

[0006] However, the sintering jig mentioned in the above patent still has the problems of slow heat dissipation and easy generation of irregular and dispersed bubbles in the product. Utility model content

[0007] In view of the problems in the prior art, the utility model provides a double-sided sintering jig for improving dispersed bubbles, which uniformly distributes through holes with a specific aperture on the bottom plate of the double-sided sintering jig, improves the heat dissipation efficiency, uniformly heats the product in the sintering process, ensures that the product does not generate dispersed bubbles in the sintering process, and improves the product quality.

[0008] To achieve the purpose, the utility model adopts the following technical solutions:

[0009] The utility model provides a double-sided sintering jig for improving dispersed bubbles, which uniformly distributes through holes with a specific aperture on the bottom plate of the double-sided sintering jig, improves the heat dissipation efficiency, uniformly heats the product in the sintering process, ensures that the product does not generate dispersed bubbles in the sintering process, and improves the product quality.

[0010] The double-sided sintering jig for improving dispersed bubbles has through holes with a diameter of 1-50 mm uniformly distributed on the bottom plate, which plays the role of rapid heat transfer and rapid heat dissipation, can uniformly heat the product in the sintering process, and can regularly bond the surface metal sheet such as copper sheet to the bottom plate, solves the problem of generation of dispersed bubbles in the sintering process of the product, and obtains qualified sintered products.

[0011] The double-sided sintering jig for improving dispersed bubbles has support strips arranged on the two sides of the bottom plate, which are used to support the product and make the product in a suspended state, so that the product has sufficient space when deforming in the sintering process.

[0012] The bottom plate is uniformly provided with through holes with a diameter of 1-50mm, for example, 1mm, 5mm, 10mm, 20mm, 40mm or 50mm, but not limited to the listed values, and other values not listed in the range are also applicable.

[0013] When the diameter of the through hole is small, the heat dissipation effect is not good, and small dispersed bubbles are still generated in the sintering process of the product, thereby affecting the quality of the product; when the diameter of the through hole is large, the normal sintering process of the surface metal sheet and the bottom plate is affected, and qualified sintered products cannot be obtained.

[0014] Preferably, the bottom plate comprises a zirconia ceramic sheet.

[0015] Preferably, the bottom plate comprises a zirconia ceramic sheet.

[0016] Preferably, the length of the bottom plate is 188-200mm, for example, 188mm, 188.5mm, 189mm, 190mm, 195mm or 200mm, but not limited to the listed values, and other values not listed in the range are also applicable.

[0017] Preferably, the width of the bottom plate is 135-140mm, for example, 135mm, 136mm, 137mm, 137.5mm, 138mm or 140mm, but not limited to the listed values, and other values not listed in the range are also applicable.

[0018] Preferably, the thickness of the bottom plate is 0.635-2mm, for example, 0.635mm, 0.7mm, 0.8mm, 1mm, 1.5mm or 2mm, but not limited to the listed values, and other values not listed in the range are also applicable.

[0019] Preferably, the thickness of the bottom plate is 0.635-2mm, which can realize stable sintering of the surface metal sheet and the bottom plate, and obtain sintered products meeting the requirements.

[0020] Preferably, the spacing of the through holes is 1-100mm, for example, 1mm, 10mm, 30mm, 50mm, 80mm or 100mm, but not limited to the listed values, and other values not listed in the range are also applicable.

[0021] Preferably, the length of the support strip is the same as that of the bottom plate.

[0022] Preferably, the support strip is stacked by at least two layers of edge strips, the width of the bottom layer of edge strips is greater than that of the top layer of edge strips, the contact area between the edge strips and the bottom plate can be increased, and the service life of the double-sided sintering jig is improved.

[0023] Preferably, the width of the edge strip is 2-5mm, for example, it can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm or 5mm, etc., but not limited to the listed values, other values not listed in the value range are also applicable.

[0024] Preferably, the width of the edge strip is 2-3mm, for example, it can be 2mm, 2.1mm, 2.3mm, 2.5mm, 2.8mm or 3mm, etc., but not limited to the listed values, other values not listed in the value range are also applicable.

[0025] Preferably, the edge strip comprises an alumina ceramic sheet.

[0026] Preferably, the height of the support strip is 4-10mm, for example, it can be 4mm, 4.5mm, 5mm, 7mm, 9mm or 10mm, etc., but not limited to the listed values, other values not listed in the value range are also applicable.

[0027] Preferably, the support strip and the bottom plate are fixed by ceramic glue.

[0028] The use method of the double-sided sintering jig for improving dispersible bubbles comprises:

[0029] After placing the copper sheet on the surface of the double-sided sintering jig for improving dispersible bubbles, under the condition of no oxygen and at a temperature of 1065-1080℃, high-temperature sintering treatment is carried out for 15-20min, and then cooling is carried out, so as to obtain a copper-clad ceramic sintering product.

[0030] Compared with the prior art, the double-sided sintering jig for improving dispersible bubbles has at least the following beneficial effects:

[0031] (1) The double-sided sintering jig for improving dispersible bubbles has a simple structure, the through holes uniformly distributed on the bottom plate can make the product evenly heated during sintering, and the problem of dispersible bubbles is solved;

[0032] (2) The double-sided sintering jig for improving dispersible bubbles has high material strength of the bottom plate, long service life, and wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of the double-sided sintering jig for improving dispersible bubbles provided by the utility model.

[0034] Figure 2It is the sectional view of the double-sided sintering jig for improving dispersible bubbles.

[0035] In the figure: 1-bottom plate; 2-through hole; 3-supporting strip. DETAILED DESCRIPTION

[0036] The technical scheme of the utility model is further illustrated below in combination with the drawings and through specific embodiments.

[0037] The utility model is further illustrated in detail below. However, the examples described below are only simple examples of the utility model and do not represent or limit the protection scope of the utility model, and the protection scope of the utility model is subject to the claims.

[0038] The utility model provides double-sided sintering jig for improving dispersible bubbles, its structural schematic diagram as Figure 1 Indicated, its sectional view as Figure 2 Indicated.

[0039] The double-sided sintering jig includes bottom plate 1 and the supporting strip 3 arranged at both sides of bottom plate;The bottom plate 1 is evenly distributed with the through hole 2 with the diameter of 1~50mm, can play the role of fast heat transfer and fast heat dissipation, makes the product even in the sintering process Heat, surface metal sheet has the regular bonding with the bottom plate, solves the problem that the product generates dispersible bubbles in the sintering process, obtains the qualified sintering product.

[0040] The bottom plate 1 includes zirconia porcelain sheet, and the strength is higher, can greatly improve the service life of double-sided sintering jig.

[0041] The length of the bottom plate 1 is 188~200mm, and the width is 135~140mm. The thickness of the bottom plate 1 is 0.635~2mm, which realizes the stable sintering of the surface metal sheet and the bottom plate, and obtains the sintering product meeting the requirements.

[0042] The spacing of the through hole 2 is 1~100mm, which ensures fast heat dissipation without affecting the effective sintering process of the surface metal sheet and the bottom plate.

[0043] The length of the supporting strip is same with the bottom plate. The supporting strip 3 is stacked by at least 2 edge strips, and the width of the bottom edge strip is greater than that of the top edge strip, which can increase the contact area of the edge strip and the bottom plate and improve the service life of the double-sided sintering jig.

[0044] The width of the edge strip is 2~5mm.

[0045] The edge strip includes alumina ceramic sheet.

[0046] The height of the supporting strip 3 is 4~10mm.

[0047] The support strip 3 is fixed with the bottom plate 1 by ceramic glue.

[0048] It should be understood that, in the description of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specified.

[0049] It should be noted that, in the description of the present application, unless otherwise specified and limited, the terms "provided", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] Example 1

[0051] The present embodiment provides a double-sided sintering jig for improving dispersion bubbles, which comprises a bottom plate and support strips arranged on both sides of the bottom plate; the bottom plate is uniformly distributed with through holes with a diameter of 30mm.

[0052] The bottom plate comprises zirconia ceramic sheets. The length of the bottom plate is 188mm, and the width is 140mm. The thickness of the bottom plate is 1mm.

[0053] The pitch of the through holes is 60mm.

[0054] The length of the support strip is the same as that of the bottom plate. The support strip is stacked by 3 layers of edge strips, the width of the bottom layer of edge strips is 4mm, the width of the middle layer of edge strips is 3mm, and the width of the top layer of edge strips is 2.5mm.

[0055] The edge strip comprises an alumina ceramic sheet.

[0056] The height of the support strip is 6mm.

[0057] The support strips are fixed to the bottom plate by ceramic glue.

[0058] Embodiment 2

[0059] The double-sided sintering jig for improving dispersible bubbles comprises a bottom plate and support strips arranged on both sides of the bottom plate.

[0060] The bottom plate comprises a zirconia ceramic sheet. The length of the bottom plate is 200 mm, and the width is 138 mm. The thickness of the bottom plate is 0.8 mm.

[0061] The pitch of the through holes is 10 mm.

[0062] The length of the support strips is the same as that of the bottom plate. The support strips are stacked by three layers of edge strips, the width of the bottom layer of edge strips is 4 mm, the width of the middle layer of edge strips is 3 mm, and the width of the top layer of edge strips is 2 mm.

[0063] The edge strips comprise an alumina ceramic sheet.

[0064] The height of the support strips is 8 mm.

[0065] The support strips are fixed to the bottom plate by ceramic glue.

[0066] Embodiment 3

[0067] The double-sided sintering jig for improving dispersible bubbles comprises a bottom plate and support strips arranged on both sides of the bottom plate. The bottom plate is uniformly distributed with through holes with a diameter of 50 mm.

[0068] The bottom plate comprises a zirconia ceramic sheet. The length of the bottom plate is 189 mm, and the width is 135 mm. The thickness of the bottom plate is 2 mm.

[0069] The pitch of the through holes is 100 mm.

[0070] The length of the support strips is the same as that of the bottom plate. The support strips are stacked by three layers of edge strips, the width of the bottom layer of edge strips is 4.3 mm, the width of the middle layer of edge strips is 2.5 mm, and the width of the top layer of edge strips is 2.5 mm.

[0071] The edge strips comprise an alumina ceramic sheet.

[0072] The height of the support strips is 10 mm.

[0073] The support strips are fixed to the bottom plate by ceramic glue.

[0074] It can be seen from the combination of embodiments 1-3 that the double-sided sintering jig for improving dispersible bubbles has simple structure, the through holes uniformly distributed on the bottom plate can make the product evenly heated in the sintering process, and the problem of dispersible bubbles is solved; and the double-sided sintering jig has long service life and wide application prospect.

[0075] Embodiment 4

[0076] The embodiment provides a double-sided sintering jig for improving dispersible bubbles, which is the same as that in embodiment 1, with the exception that the width of the bottom layer of the edge strip is 2.5 mm, the width of the middle layer of the edge strip is 2.5 mm, and the width of the top layer of the edge strip is 5 mm.

[0077] In the embodiment, the width of the bottom layer of the edge strip is smaller than that of the top layer of the edge strip, so that the contact area of the bottom layer of the edge strip with the bottom plate is small, and the service life of the double-sided sintering jig is shortened.

[0078] Comparative example 1

[0079] The comparative example provides a double-sided sintering jig, which comprises a bottom plate and support strips arranged on both sides of the bottom plate; the bottom plate is not provided with through holes; the bottom plate comprises a zirconia ceramic sheet; and the thickness is 1 mm.

[0080] The support strip is stacked by three layers of edge strips, the width of the bottom layer of the edge strip is 4 mm, the width of the middle layer of the edge strip is 3 mm, and the width of the top layer of the edge strip is 2.5 mm.

[0081] The edge strip comprises an alumina ceramic sheet.

[0082] The height of the support strip is 6 mm. The support strip and the bottom plate are fixed by ceramic glue.

[0083] In the comparative example, the bottom plate is not provided with through holes, the heat transfer efficiency is slow, and the heat dissipation is also slow, so that irregular dispersible bubbles are generated in the product in the sintering process, and the product quality is affected.

[0084] Comparative example 2

[0085] The comparative example provides a double-sided sintering jig for improving dispersible bubbles, which is the same as that in embodiment 1, with the exception that the support strips arranged on both sides of the bottom plate are one layer of edge strips with a height of 2 mm.

[0086] In the comparative example, the support strips arranged on both sides of the bottom plate are one layer of edge strips with a height of 2 mm, the product is deformed in the sintering process, and the product and the jig are scrapped.

[0087] Comparative example 3

[0088] The comparative example provides a double-sided sintering jig for improving dispersed bubbles, which is the same as example 1 except that the diameter of the through hole is 0.2mm.

[0089] In the comparative example, the diameter of the through hole is small, and the heat dissipation effect cannot be well played, which can cause fine dispersed bubbles in the sintering process of the product, and further affect the quality of the product.

[0090] Comparative example 4

[0091] The comparative example provides a double-sided sintering jig for improving dispersed bubbles, which is the same as example 1 except that the diameter of the through hole is 70mm.

[0092] In the comparative example, the diameter of the through hole is large, which can affect the normal sintering process of the surface metal sheet and the bottom plate, and qualified sintered products cannot be obtained.

[0093] The applicant declares that the detailed structural features of the utility model are illustrated by the above examples, but the utility model is not limited to the above detailed structural features, that is, it does not mean that the utility model must rely on the above detailed structural features to be implemented. It should be understood by those skilled in the art that any improvement of the utility model, equivalent replacement of the components selected by the utility model, increase of auxiliary components, selection of specific modes, etc. fall within the protection scope and disclosure scope of the utility model.

[0094] The preferred embodiments of the utility model are described in detail above, but the utility model is not limited to the specific details in the above embodiments, and within the technical concept scope of the utility model, the technical scheme of the utility model can be subjected to various simple modifications, and these simple modifications all belong to the protection scope of the utility model.

Claims

1. A double-sided sintering jig for improving dispersibility of bubbles, characterized by, The double-sided sintering jig comprises a bottom plate and support strips arranged on both sides of the bottom plate; the bottom plate is uniformly provided with through holes with a diameter of 1-50 mm; The length of the bottom plate is 188-200 mm, and the width is 135-140 mm; The thickness of the bottom plate is 0.635-2 mm; The spacing of the through holes is 1-100 mm; The length of the support strip is the same as that of the bottom plate.

2. The double-sided sintering jig for improving dispersibility bubbles according to claim 1, wherein, The support strip is stacked by at least two edge strips, and the width of the bottom edge strip is greater than that of the top edge strip.

3. The double-sided sintering jig for improving dispersibility bubbles according to claim 2, wherein The width of the edge strip is 2-5 mm.

4. The double-sided sintering jig for improving dispersibility bubbles according to claim 3, wherein The width of the edge strip is 2-3 mm.

5. The double-sided sintering fixture for improving dispersible bubbles according to claim 1, wherein The height of the support strip is 4-10 mm.

6. The double-sided sintering fixture for improving dispersible bubbles according to claim 1, wherein The support strip and the bottom plate are fixed by ceramic glue.

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