Double-sided sintering jig for copper-clad ceramic substrate

Abstract

The utility model provides a double-sided sintering jig for a copper-clad ceramic substrate, which comprises a bottom plate, and a first baffle plate and a second baffle plate are symmetrically arranged on the edge of the surface of one side of the bottom plate; a first supporting strip is arranged at the contact angle of the first baffle and the bottom plate, a second supporting strip is arranged at the contact angle of the second baffle and the bottom plate, and the first supporting strip and the second supporting strip are oppositely arranged; the side, facing the second supporting strip, of the first supporting strip is of a first step structure, and the side, facing the first supporting strip, of the second supporting strip is of a second step structure. Through the specific design that the baffles and the supporting strips are additionally arranged on the bottom plate and the specific structure of the supporting strips is limited, the oxygen inhalation of the product can be prevented, foreign matters are prevented from falling on the surface of the product, so that bad defects caused by the foreign matters to the product are avoided, and the device is simple in structure and suitable for industrial popularization.

Description

Technical Field

[0001] This utility model belongs to the technical field of copper-clad ceramic substrates and relates to a double-sided sintering fixture for copper-clad ceramic substrates. Background Technology

[0002] With the development of new energy vehicles, the development of power semiconductor modules has also been rapid. Packaging technology is becoming increasingly sophisticated, and the requirements for heat dissipation copper-clad ceramic substrates are becoming more and more stringent. The sintering fixture of the copper-clad ceramic substrate is crucial to its final sintering effect.

[0003] The prior art discloses a double-sided sintering fixture for copper-clad ceramic substrates, including a base plate. Several first fixture points are evenly arranged along the edge of the short axis of the base plate. A first bottom protrusion is fixedly connected to the lower surface of each first fixture point. A first positioning hole that mates with the first bottom protrusion is opened on the upper surface of the base plate, and the first bottom protrusion is inserted into the first positioning hole. A second fixture point is installed along the edge of the long axis of the base plate. A second bottom protrusion is fixedly connected to the lower surface of the second fixture point. A second positioning hole that mates with the second bottom protrusion is opened on the upper surface of the base plate, and the second bottom protrusion is inserted into the second positioning hole. The height of the first fixture point is twice the height of the second fixture point.

[0004] The prior art discloses a double-sided sintering fixture, which includes a base plate and support blocks. The base plate is made of alumina and includes a first end face and a second end face. The first end face of the base plate is in direct contact with the ground, and the second end face of the base plate is fixedly connected to the fixing part of the support block. There are multiple support blocks, which are evenly arranged along the periphery of the base plate. The fixing parts of the multiple support blocks are all fixedly connected to the base plate, and the supporting parts of the multiple support blocks are in direct contact with the copper-clad ceramic substrate.

[0005] However, existing technologies suffer from several drawbacks during sintering. Firstly, oxygen absorption by the furnace and conveyor belt during sintering affects product performance. Secondly, furnace ash, conveyor belt ash, and other foreign matter falling from the top can cause surface defects, impacting yield and quality. Thirdly, the sintering process requires the use of gaskets at the bottom of the fixture, which suffers from high breakage rates, high costs, and cumbersome operation. Therefore, there is an urgent need to design and develop a double-sided sintering fixture for copper-clad ceramic substrates to overcome these shortcomings and meet practical application requirements. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a double-sided sintering fixture for copper-clad ceramic substrates. In this utility model, by adding baffles and support strips to the base plate and defining the specific structure of the support strips, oxygen absorption by the product can be prevented and foreign objects can be prevented from falling onto the product surface, thereby avoiding defects caused by foreign objects. The structure is simple and suitable for industrial promotion.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model provides a double-sided sintering fixture for copper-clad ceramic substrates. The double-sided sintering fixture includes a base plate, and a first baffle and a second baffle are symmetrically arranged on one side edge of the base plate.

[0009] A first support strip is provided at the contact angle between the first baffle and the bottom plate, and a second support strip is provided at the contact angle between the second baffle and the bottom plate. The first support strip and the second support strip are arranged opposite to each other.

[0010] The side of the first support bar facing the second support bar has a first stepped structure, and the side of the second support bar facing the first support bar has a second stepped structure.

[0011] In this utility model, by adding baffles and support strips to the base plate and defining the specific structure of the support strips, it is possible to prevent the product from absorbing oxygen and prevent foreign objects from falling onto the product surface, thereby avoiding foreign objects from causing adverse defects to the product. The structure is simple and suitable for industrial promotion.

[0012] It should be noted that currently used double-sided fixtures lack edge guards, leading to oxygen absorption by the product and affecting its performance. Furthermore, a top cover cannot be placed, and foreign objects can cause defects. Additionally, gaskets are required, which are costly and cumbersome. The double-sided sintering fixture designed in this invention overcomes these shortcomings by employing baffles and stepped support strips. It prevents oxygen absorption and foreign objects from falling onto the product surface, thus avoiding defects caused by foreign objects. The structure is simple and the cost is low.

[0013] It should be noted that the specific parameters (such as length, width, etc.) of the first baffle and the second baffle in this utility model can be the same or different, and the specific parameters (such as length, width, etc.) of the first support strip and the second support strip can be the same or different.

[0014] As a preferred technical solution of this utility model, the length of the first baffle is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0015] Preferably, the thickness of the first baffle is 1mm to 2mm, for example, it can be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0016] Preferably, the height of the first baffle is 5mm to 10mm, for example, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0017] In this invention, the length of the first baffle is limited to 188mm to 200mm, the thickness to 1mm to 2mm, and the height to 5mm to 10mm. This is because within this range, the fixture structure itself is more suitable for the product, allowing the product to reach an ideal state during the sintering process. If it is not within this range, the product may become unusable and be scrapped. This is because the structural dimensions of the product itself are 138*190±5mm. If the fixture size is too large, it will affect the product's heating, and the excess part of the fixture will absorb too much heat, leading to product scrapping. If the fixture size is too small, the product will be suspended in mid-air, and the product will be exposed to the fixture, causing foreign objects to fall onto the product surface, resulting in product scrapping.

[0018] Preferably, the height of the first baffle is greater than the height of the first support bar.

[0019] The height of the first baffle is limited to be greater than the height of the first support strip in this utility model because a cover plate is to be placed on the first baffle. This structure can prevent the cover plate from contacting and sticking to the product.

[0020] As a preferred technical solution of this utility model, the length of the second baffle is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0021] Preferably, the thickness of the second baffle is 1mm to 2mm, for example, it can be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0022] Preferably, the height of the second baffle is 5mm to 10mm, for example, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0023] This utility model specifies that the length of the second baffle is 188mm to 200mm, the thickness is 1mm to 2mm, and the height is 5mm to 10mm. This is because within this range, the fixture structure itself is more suitable for the product, allowing the product to reach an ideal state during the sintering process. If it is not within this range, the product may become unusable and be scrapped. This is because the structural dimensions of the product itself are 138*190±5mm. If the fixture size is too large, it will affect the product's heating, and the excess part of the fixture will absorb too much heat, leading to product scrapping. If the fixture size is too small, the product will be suspended in mid-air, and the product will be exposed to the fixture, causing foreign objects to fall onto the product surface, resulting in product scrapping.

[0024] Preferably, the height of the second baffle is greater than the height of the second support bar.

[0025] The height of the second baffle is limited to be greater than the height of the second support bar in this invention because a cover plate is to be placed on the second baffle. This structure can prevent the cover plate from contacting and sticking to the product.

[0026] It should be noted that the first and second baffles in this utility model can serve to support the cover plate and prevent the product from absorbing oxygen and foreign objects from falling off.

[0027] As a preferred technical solution of this utility model, the length of the base plate is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0028] Preferably, the width of the base plate is 135mm to 140mm, for example, it can be 135mm, 136mm, 137mm, 138mm, 139mm, 140mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0029] As a preferred embodiment of the present invention, the first baffle is bonded to the edge of the base plate.

[0030] Preferably, the second baffle is adhered to the edge of the base plate.

[0031] Preferably, the adhesive used is ceramic adhesive.

[0032] It should be noted that the present invention does not impose any special limitations on the specific amount or type of ceramic adhesive. Those skilled in the art can make adaptive adjustments according to the actual situation. Among them, high-temperature resistant ceramic adhesive can be selected.

[0033] As a preferred technical solution of this utility model, the first stepped structure includes a first boss and a second boss arranged sequentially along the direction away from the base plate, wherein the width of the first boss is greater than the width of the second boss.

[0034] Preferably, the surface of the second boss facing the second support bar is a first inclined surface.

[0035] As a preferred technical solution of this utility model, the second stepped structure includes a third boss and a fourth boss arranged sequentially in a direction away from the base plate, wherein the width of the third boss is greater than the width of the fourth boss.

[0036] Preferably, the surface of the fourth protrusion facing the first support bar is a second inclined surface, which is used to cooperate with the first inclined surface to support the edge of the product.

[0037] It should be noted that the first inclined surface in this invention is designed to fit one side edge of the product with the second inclined surface, while the other symmetrical edge fits with the second inclined surface, thus enabling the support strip to provide support. Furthermore, both the side of the first protrusion facing the second support strip and the side of the third protrusion facing the first support strip are inclined surfaces, which increases the contact area between the support strip and the base plate, improves stability, and extends service life. The specific angle of this inclined surface is not specifically limited in this invention, and those skilled in the art can make adaptive adjustments based on actual conditions. Because the product will deform after sintering, the stepped structure allows the design of the second and fourth protrusions to keep the deformed product horizontal. The design of the first and third protrusions can also limit the product's placement, ensuring it remains horizontal.

[0038] In a preferred embodiment of this invention, the height of the third boss is the same as the height of the first boss, and the width of the third boss is the same as the width of the first boss.

[0039] Preferably, the height of the fourth boss is the same as the height of the second boss, and the width of the fourth boss is the same as the width of the second boss.

[0040] As a preferred technical solution of this utility model, the inclination angle of the first inclined surface is 120° to 140°, for example, it can be 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0041] Preferably, the inclination angle of the second inclined plane is 120° to 140°, for example, it can be 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0042] In this invention, the inclination angle of the first inclined surface is limited to 120° to 140°, and the inclination angle of the second inclined surface is also limited to 120° to 140°. This is because within this range, the deformation of the product during sintering is not restricted. If it is outside this range, it may cause ceramic cracks and product distortion during sintering. This is because the product will deform during sintering. If the inclination angle is too large, the product will be distorted. If the inclination angle is too small, it will hinder the deformation of the product, resulting in ceramic cracks and product scrap.

[0043] In a preferred embodiment of this invention, the base plate, the first baffle, the second baffle, the first support strip, and the second support strip are all made of the same material.

[0044] Preferably, the base plate is made of alumina or zirconium oxide.

[0045] It should be noted that the overall structure of this utility model is made of alumina or zirconium oxide because these materials are heat-resistant, can extend service life, are easy to cut and manufacture, and do not absorb oxygen.

[0046] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0047] In this utility model, by adding baffles and support strips to the base plate and defining the specific structure of the support strips, it is possible to prevent the product from absorbing oxygen and prevent foreign objects from falling onto the product surface, thereby avoiding foreign objects from causing adverse defects to the product. The structure is simple and suitable for industrial promotion. Attached Figure Description

[0048] Figure 1 A front view of a double-sided sintering fixture for a copper-clad ceramic substrate provided in a specific embodiment of this utility model;

[0049] Figure 2 A side view of a double-sided sintering fixture for a copper-clad ceramic substrate provided in a specific embodiment of this utility model.

[0050] Wherein, 1-base plate; 2-first baffle; 3-second baffle; 4-first support bar; 5-second support bar; 6-first inclined surface; 7-second inclined surface. Detailed Implementation

[0051] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] Those skilled in the art should understand that this utility model necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving complete process, but the above content is not the main utility model point of this utility model. Those skilled in the art can add layouts based on process flow and equipment structure selection. This utility model does not make any special requirements or specific limitations in this regard.

[0054] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0055] In one specific embodiment, this utility model provides a double-sided sintering fixture for copper-clad ceramic substrates, such as... Figure 1 and Figure 2 As shown, the double-sided sintering fixture includes a base plate 1, and a first baffle 2 and a second baffle 3 are symmetrically arranged on one side edge of the base plate 1.

[0056] A first support strip 4 is provided at the contact angle between the first baffle 2 and the bottom plate 1, and a second support strip 5 is provided at the contact angle between the second baffle 3 and the bottom plate 1. The first support strip 4 and the second support strip 5 are arranged opposite to each other.

[0057] The side of the first support bar 4 facing the second support bar 5 is a first stepped structure, and the side of the second support bar 5 facing the first support bar 4 is a second stepped structure.

[0058] In this utility model, by adding baffles and support strips to the base plate 1 and defining the specific structure of the support strips, it is possible to prevent the product from absorbing oxygen and prevent foreign objects from falling onto the product surface, thereby avoiding foreign objects causing adverse defects to the product. The structure is simple and suitable for industrial promotion.

[0059] It should be noted that currently used double-sided fixtures lack edge guards, leading to oxygen absorption by the product and affecting its performance. Furthermore, a top cover cannot be placed, and foreign objects can cause defects. Additionally, gaskets are required, which are costly and cumbersome. The double-sided sintering fixture designed in this invention overcomes these shortcomings by employing baffles and stepped support strips. It prevents oxygen absorption and foreign objects from falling onto the product surface, thus avoiding defects caused by foreign objects. The structure is simple and the cost is low.

[0060] In one embodiment, the length of the first baffle 2 is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0061] In one embodiment, the thickness of the first baffle 2 is 1mm to 2mm, for example, it can be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0062] In one embodiment, the height of the first baffle 2 is 5mm to 10mm, for example, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0063] In one embodiment, the height of the first baffle 2 is greater than the height of the first support bar 4.

[0064] In one embodiment, the length of the second baffle 3 is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0065] In one embodiment, the thickness of the second baffle 3 is 1mm to 2mm, for example, it can be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0066] In one embodiment, the height of the second baffle 3 is 5mm to 10mm, for example, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0067] In one embodiment, the height of the second baffle 3 is greater than the height of the second support bar 5.

[0068] It should be noted that the first baffle 2 and the second baffle 3 in this utility model can serve to support the cover plate and prevent the product from absorbing oxygen and foreign objects from falling.

[0069] In one embodiment, the length of the base plate 1 is 188mm to 200mm, for example, it can be 188mm, 190mm, 192mm, 194mm, 196mm, 198mm, 200mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0070] In one embodiment, the width of the base plate 1 is 135mm to 140mm, for example, it can be 135mm, 136mm, 137mm, 138mm, 139mm, 140mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0071] In one embodiment, the first baffle 2 is adhered to the edge of the base plate 1.

[0072] In one embodiment, the second baffle 3 is adhered to the edge of the base plate 1.

[0073] In one embodiment, ceramic adhesive is used for bonding.

[0074] It should be noted that the present invention does not impose any special limitations on the specific amount or type of ceramic adhesive. Those skilled in the art can make adaptive adjustments according to the actual situation. Among them, high-temperature resistant ceramic adhesive can be selected.

[0075] In one embodiment, the first stepped structure includes a first boss and a second boss arranged sequentially in a direction away from the base plate 1, wherein the width of the first boss is greater than the width of the second boss.

[0076] In one embodiment, the surface of the second boss facing the second support bar 5 is a first inclined surface 6.

[0077] In one embodiment, the second stepped structure includes a third boss and a fourth boss arranged sequentially in a direction away from the base plate 1, wherein the width of the third boss is greater than the width of the fourth boss.

[0078] In one embodiment, the side surface of the fourth boss facing the first support bar 4 is a second inclined surface 7, which is used to cooperate with the first inclined surface 6 to support the edge of the product.

[0079] It should be noted that the first inclined surface 6 in this utility model is designed to fit one side edge of the product with it, and the other symmetrical edge fits with the second inclined surface 7, so that the support strip can play a supporting role; furthermore, the side of the first boss facing the second support strip 5 and the side of the third boss facing the first support strip 4 are both inclined surfaces, which can increase the contact area between the support strip and the base plate 1, improve stability, and extend service life. The specific angle of this inclined surface in this utility model is not specifically limited, and those skilled in the art can make adaptive adjustments according to the actual situation; because the product will deform after sintering, the stepped structure allows the design of the second and fourth bosses to keep the deformed product in a horizontal state; the design of the first and third bosses can play a limiting role when the product is placed, so that the product is kept in a horizontal state when placed.

[0080] In one embodiment, the height of the third boss is the same as the height of the first boss, and the width of the third boss is the same as the width of the first boss.

[0081] In one embodiment, the height of the fourth boss is the same as the height of the second boss, and the width of the fourth boss is the same as the width of the second boss.

[0082] In one embodiment, the inclination angle of the first inclined plane 6 is 120° to 140°, for example, it can be 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0083] In one embodiment, the inclination angle of the second inclined plane 7 is 120° to 140°, for example, it can be 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0084] In one embodiment, the base plate 1, the first baffle 2, the second baffle 3, the first support bar 4, and the second support bar 5 are all made of the same material.

[0085] In one embodiment, the base plate 1 is made of alumina or zirconium oxide.

[0086] Example 1

[0087] This embodiment provides a double-sided sintering fixture for copper-clad ceramic substrates, wherein:

[0088] The double-sided sintering fixture includes a base plate 1. A first baffle 2 and a second baffle 3 are symmetrically arranged on one side edge of the base plate 1. A first support strip 4 is provided at the contact angle between the first baffle 2 and the base plate 1, and a second support strip 5 is provided at the contact angle between the second baffle 3 and the base plate 1. The first support strip 4 and the second support strip 5 are arranged opposite to each other. The side of the first support strip 4 facing the second support strip 5 has a first stepped structure, and the side of the second support strip 5 facing the first support strip 4 has a second stepped structure.

[0089] The length of the first baffle 2 is 80mm, the thickness of the first baffle 2 is 2mm, the height of the first baffle 2 is 6mm, and the height of the first baffle 2 is greater than the height of the first support bar 4.

[0090] The second baffle 3 has a length of 80mm, a thickness of 2mm, and a height of 6mm. The height of the second baffle 3 is greater than the height of the second support bar 5.

[0091] The base plate 1 is 90mm long and 30mm wide.

[0092] The first baffle 2 is bonded to the edge of the base plate 1, and the second baffle 3 is bonded to the edge of the base plate 1. Ceramic adhesive is used for bonding.

[0093] The first stepped structure includes a first boss and a second boss arranged sequentially in a direction away from the base plate 1. The width of the first boss is greater than the width of the second boss, and the surface of the second boss facing the second support bar 5 is a first inclined surface 6.

[0094] The second stepped structure includes a third boss and a fourth boss arranged sequentially in the direction away from the base plate 1. The width of the third boss is greater than the width of the fourth boss. The surface of the fourth boss facing the first support bar 4 is a second inclined surface 7. The second inclined surface 7 is used to cooperate with the first inclined surface 6 to support the edge of the product.

[0095] The height of the third boss is the same as the height of the first boss, and the width of the third boss is the same as the width of the first boss; the height of the fourth boss is the same as the height of the second boss, and the width of the fourth boss is the same as the width of the second boss.

[0096] The inclination angle of the first inclined plane 6 is 137°; the inclination angle of the second inclined plane 7 is 137°.

[0097] The base plate 1, the first baffle 2, the second baffle 3, the first support bar 4, and the second support bar 5 are all made of aluminum oxide.

[0098] Example 2

[0099] This embodiment provides a double-sided sintering fixture for copper-clad ceramic substrates, wherein:

[0100] The double-sided sintering fixture includes a base plate 1. A first baffle 2 and a second baffle 3 are symmetrically arranged on one side edge of the base plate 1. A first support strip 4 is provided at the contact angle between the first baffle 2 and the base plate 1, and a second support strip 5 is provided at the contact angle between the second baffle 3 and the base plate 1. The first support strip 4 and the second support strip 5 are arranged opposite to each other. The side of the first support strip 4 facing the second support strip 5 has a first stepped structure, and the side of the second support strip 5 facing the first support strip 4 has a second stepped structure.

[0101] The length of the first baffle 2 is 100mm, the thickness of the first baffle 2 is 3mm, the height of the first baffle 2 is 10mm, and the height of the first baffle 2 is greater than the height of the first support bar 4.

[0102] The second baffle 3 has a length of 100mm, a thickness of 2mm, and a height of 10mm. The height of the second baffle 3 is greater than the height of the second support bar 5.

[0103] The base plate 1 is 100mm long and 50mm wide.

[0104] The first baffle 2 is bonded to the edge of the base plate 1, and the second baffle 3 is bonded to the edge of the base plate 1. Ceramic adhesive is used for bonding.

[0105] The first stepped structure includes a first boss and a second boss arranged sequentially in a direction away from the base plate 1. The width of the first boss is greater than the width of the second boss, and the surface of the second boss facing the second support bar 5 is a first inclined surface 6.

[0106] The second stepped structure includes a third boss and a fourth boss arranged sequentially in the direction away from the base plate 1. The width of the third boss is greater than the width of the fourth boss. The surface of the fourth boss facing the first support bar 4 is a second inclined surface 7. The second inclined surface 7 is used to cooperate with the first inclined surface 6 to support the edge of the product.

[0107] The height of the third boss is the same as the height of the first boss, and the width of the third boss is the same as the width of the first boss; the height of the fourth boss is the same as the height of the second boss, and the width of the fourth boss is the same as the width of the second boss.

[0108] The first inclined plane 6 has an inclination angle of 100°; the second inclined plane 7 has an inclination angle of 100°.

[0109] The base plate 1, the first baffle 2, the second baffle 3, the first support bar 4, and the second support bar 5 are all made of zirconium oxide.

[0110] Comparative Example 1

[0111] This comparative example provides a double-sided sintering fixture for a copper-clad ceramic substrate, which differs from Example 1 in that it does not have a first support bar 4 and a second support bar 5, while other parameters are the same as in Example 1.

[0112] Comparative Example 2

[0113] This comparative example provides a double-sided sintering fixture for a copper-clad ceramic substrate, which differs from Example 1 in that it does not have a first baffle 2 and a second baffle 3, while other parameters are the same as in Example 1.

[0114] Comparative Example 3

[0115] This comparative example provides a double-sided sintering fixture for a copper-clad ceramic substrate. Unlike Example 1, the first support bar 4 and the second support bar 5 are both block-shaped support structures, while other parameters are the same as in Example 1.

[0116] The copper-clad ceramic substrates were sintered using the double-sided sintering fixtures in the above embodiments and comparative examples. Specifically, the same sintering furnace was used, and the same temperature was used for continuous sequential sintering. The results are shown in Table 1 below.

[0117]

[0118] From Table 1 above, we can see that:

[0119] The double-sided sintering fixture in Examples 1-2 has a better sintering effect on copper-clad ceramic substrates than the double-sided sintering fixture in Comparative Examples 1-3. This is because the present invention, by adding baffles and support strips to the base plate 1 and defining the specific structure of the support strips, can prevent the product from absorbing oxygen and prevent foreign objects from falling onto the product surface, thereby avoiding foreign objects from causing adverse defects to the product.

[0120] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A double-sided sintering fixture for copper-clad ceramic substrates, characterized in that, The double-sided sintering fixture includes a base plate, and a first baffle and a second baffle are symmetrically arranged on one side edge of the base plate. A first support strip is provided at the contact angle between the first baffle and the bottom plate, and a second support strip is provided at the contact angle between the second baffle and the bottom plate. The first support strip and the second support strip are arranged opposite to each other. The side of the first support bar facing the second support bar has a first stepped structure, and the side of the second support bar facing the first support bar has a second stepped structure. The first stepped structure includes a first protrusion and a second protrusion arranged sequentially in a direction away from the base plate. The width of the first protrusion is greater than the width of the second protrusion, and the surface of the second protrusion facing the second support bar is a first inclined surface. The second stepped structure includes a third protrusion and a fourth protrusion arranged sequentially in a direction away from the base plate. The width of the third protrusion is greater than the width of the fourth protrusion. The surface of the fourth protrusion facing the first support strip is a second inclined surface. The second inclined surface is used to cooperate with the first inclined surface to support the edge of the product. The height of the third boss is the same as the height of the first boss, and the width of the third boss is the same as the width of the first boss. The height of the fourth boss is the same as the height of the second boss, and the width of the fourth boss is the same as the width of the second boss.

2. The double-sided sintering fixture according to claim 1, characterized in that, The length of the first baffle is 188mm~200mm; The thickness of the first baffle is 1mm~2mm; The height of the first baffle is 5mm~10mm; The height of the first baffle is greater than the height of the first support bar.

3. The double-sided sintering fixture according to claim 1, characterized in that, The length of the second baffle is 188mm~200mm; The thickness of the second baffle is 1mm~2mm; The height of the second baffle is 5mm~10mm; The height of the second baffle is greater than the height of the second support bar.

4. The double-sided sintering fixture according to claim 1, characterized in that, The length of the base plate is 188mm~200mm; The width of the base plate is 135mm~140mm.

5. The double-sided sintering fixture according to claim 1, characterized in that, The first baffle is bonded to the edge of the base plate; The second baffle is bonded to the edge of the base plate.

6. The double-sided sintering fixture according to claim 1, characterized in that, The inclination angle of the first inclined plane is 120°~140°.

7. The double-sided sintering fixture according to claim 6, characterized in that, The inclination angle of the second inclined plane is 120°~140°.

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