Aluminum nitride ceramic substrate with adjustable load sheet structure

Abstract

The utility model belongs to the field of aluminum nitride ceramic substrates, and particularly relates to an aluminum nitride ceramic substrate with an adjustable load sheet structure, which comprises an aluminum nitride ceramic substrate body, a resistance sheet is fixedly connected to the surface of the aluminum nitride ceramic substrate body, a load sheet body is welded to the surface of the resistance sheet, and the load sheet body is connected with the aluminum nitride ceramic substrate body. An adjusting mechanism is arranged on the surface of the aluminum nitride ceramic substrate body; according to the utility model, the aluminum nitride ceramic substrate body, the adjusting mechanism, the resistor discs and the load discs are matched for use, and when a plurality of load discs are welded on the resistor discs on the aluminum nitride ceramic substrate body, the mounting distances of different load discs can be adjusted through the adjusting mechanism, so that the condition that the positions of the load discs mounted on the substrate are uniform is avoided; and if the plurality of resistor discs are mounted on the substrate in too dense positions or non-uniform distribution, the heat flux density in the area is too high, the air circulation in the area is blocked, and local heat is accumulated and is difficult to dissipate.

Description

Technical Field

[0001] This utility model relates to the field of aluminum nitride ceramic substrates, specifically an aluminum nitride ceramic substrate with an adjustable load sheet structure. Background Technology

[0002] Aluminum nitride ceramic substrates are a high-performance electronic packaging material. With their excellent thermal conductivity, electrical insulation and mechanical properties, they have shown broad application prospects in power electronics, LED lighting, radio frequency communication and other fields. Multiple load cells are usually placed on aluminum nitride ceramic substrates.

[0003] A Chinese patent application with application number "202022187359.8" discloses a "Novel RF Load Cell". This patent employs a ceramic substrate, pads, a ground terminal, a resistor, a moisture-proof protective film, an anti-corrosion film, and a back conductor. The pads are fixed to the ceramic substrate, and there are two pads, with a resistor connecting the two pads. The moisture-proof protective film is attached to the resistor, and its area is larger than the resistor's area, so that the edge of the moisture-proof protective film adheres to the pad. The anti-corrosion film covers the moisture-proof protective film. A back conductor is provided on the back of the ceramic substrate. The ground terminal is elongated and attached to both sides of the ceramic substrate, and it is in contact with the pads, resistor, moisture-proof protective film, anti-corrosion film, and back conductor. This application enhances the reliability of the load cell by setting multiple protective films to prevent sulfur-containing gases from corroding the printed silver layer in the external electrode area. This application is designed according to SMT mounting requirements, facilitating direct mounting by customers.

[0004] The resistor sheet is a key component of the load sheet. The position of the load sheet on the substrate is uniform. If multiple resistor sheets are installed too densely or unevenly on the substrate, the heat flux density in that area will be too high, and the air circulation in that area will be blocked, making it difficult for local heat to accumulate and dissipate. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the positions of the load plates on the substrate are uniform. If the positions of multiple resistor plates on the substrate are too dense or unevenly distributed, it will lead to excessively high heat flux density in the area, obstructed air circulation in the area, and difficulty in dissipating local heat accumulation. This utility model proposes an aluminum nitride ceramic substrate with an adjustable load plate structure.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an aluminum nitride ceramic substrate with an adjustable load sheet structure, including an aluminum nitride ceramic substrate body, a resistor sheet fixedly connected to the surface of the aluminum nitride ceramic substrate body, a load sheet body welded to the surface of the resistor sheet, and an adjustment mechanism provided on the surface of the aluminum nitride ceramic substrate body.

[0007] The adjustment mechanism includes two support rods. The bottom of each support rod is movably connected to the top of the aluminum nitride ceramic substrate. The inner sides of the two support rods are movably connected to a movable rod. A rotating block is movably connected to the surface of one of the support rods. A threaded rod is fixedly connected to the surface of the rotating block. One end of the threaded rod passes through the inner cavity of the movable rod and the outer side of the other support rod. A limit block is threadedly connected to the surface of the threaded rod. There are five limit blocks. A movable block is fixedly connected to the surface of each limit block. The surface of the movable block is movably connected to the surfaces of the movable rod and the resistor sheet.

[0008] Preferably, the inner cavity of the movable rod is provided with a limiting groove, and the inner cavity of the limiting groove is movably connected to the surface of the limiting block.

[0009] Preferably, a limiting ring is fixedly connected to the surface of the limiting block, and the surface of the limiting ring is movably connected to the surface of one of the support rods.

[0010] Preferably, the surface of the support rod is provided with a sliding groove, and a sliding block is movably connected to the inner cavity of the sliding groove. The inner cavity of the sliding block is movably connected to the surface of the limiting block.

[0011] Preferably, the surface of the support rod is provided with a movable groove, and the inner cavity of the movable groove is movably connected to the surface of the limiting block.

[0012] Preferably, the inner cavity of the sliding groove is fixedly connected with a block, and the number of the block is four, with the surface of the block being movably connected to the surface of the sliding block.

[0013] Preferably, the bottom of the support rod is fixedly connected to a snap-fit ​​post, and the surface of the snap-fit ​​post is movably connected to the inner cavity of the aluminum nitride ceramic substrate body.

[0014] The advantages of this utility model are:

[0015] This invention utilizes an aluminum nitride ceramic substrate body, an adjustment mechanism, resistors, and load plates in conjunction. When welding multiple load plates onto the resistors on the aluminum ceramic substrate body, the adjustment mechanism can be used to adjust the different installation spacing of the load plates. This avoids the problem that if the load plates are installed in a uniform position on the substrate, and the multiple resistors are installed too densely or unevenly, it will lead to excessively high heat flux density in that area, obstructed airflow in that area, and local heat accumulation that is difficult to dissipate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0019] Figure 3 This is an exploded view of the support rod structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the support rod of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the movable rod of this utility model.

[0022] In the figure: 1. Aluminum nitride ceramic substrate body; 2. Adjustment mechanism; 201. Support rod; 202. Rotating block; 203. Movable rod; 204. Block; 205. Threaded rod; 206. Limiting ring; 207. Movable block; 208. Movable groove; 209. Snap-fit ​​post; 210. Limiting groove; 211. Limiting block; 212. Sliding block; 213. Sliding groove; 3. Resistor sheet; 4. Load sheet body. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses an aluminum nitride ceramic substrate with an adjustable load sheet structure. (Refer to...) Figure 1 and Figure 5 An aluminum nitride ceramic substrate with an adjustable load sheet structure includes an aluminum nitride ceramic substrate body 1, a resistor sheet 3 fixedly connected to the surface of the aluminum nitride ceramic substrate body 1, a load sheet body 4 welded to the surface of the resistor sheet 3, and an adjustment mechanism 2 provided on the surface of the aluminum nitride ceramic substrate body 1.

[0026] The adjustment mechanism 2 includes a support rod 201. The bottom of the support rod 201 is movably connected to the top of the aluminum nitride ceramic substrate body 1. There are two support rods 201. The inner sides of the two support rods 201 are movably connected to a movable rod 203. A rotating block 202 is movably connected to the surface of one of the support rods 201. A threaded rod 205 is fixedly connected to the surface of the rotating block 202. One end of the threaded rod 205 passes through the inner cavity of the movable rod 203 and the outer side of the other support rod 201. A limiting block 211 is threadedly connected to the surface of the threaded rod 205. There are five limiting blocks 211. A movable block 207 is fixedly connected to the surface of each limiting block 211. The surface of the movable block 207 is movably connected to the surface of the movable rod 203 and the resistive element 3.

[0027] Reference Figure 5 The inner cavity of the movable rod 203 is provided with a limiting groove 210. The inner cavity of the limiting groove 210 is movably connected to the surface of the limiting block 211. The limiting groove 210 limits the sliding of the limiting block 211 in the inner cavity of the movable rod 203, and prevents the limiting block 211 from rotating when the threaded rod 205 rotates with the threaded inner cavity of the limiting block 211. This allows the limiting block 211 to slide smoothly in the inner cavity of the movable rod 203.

[0028] Reference Figure 2 and Figure 4 A limiting ring 206 is fixedly connected to the surface of the limiting block 211. The surface of the limiting ring 206 is movably connected to the surface of one of the support rods 201. The limiting ring 206 limits the rotation of the threaded rod 205 in the inner cavity of the support rod 201 and the movable rod 203, preventing the threaded rod 205 from disengaging from the inner cavity of the support rod 201 and the movable rod 203 during rotation.

[0029] Reference Figure 4 The surface of the support rod 201 is provided with a sliding groove 213, and a sliding block 212 is movably connected to the inner cavity of the sliding groove 213. The inner cavity of the sliding block 212 is movably connected to the surface of the limiting block 211. The sliding groove 213 guides the sliding block 212 in the inner cavity of the support rod 201, thereby improving the stability of the sliding block 212 in the inner cavity of the support rod 201.

[0030] Reference Figure 4 The surface of the support rod 201 is provided with a movable groove 208. The inner cavity of the movable groove 208 is movably connected to the surface of the limiting block 211. The movable groove 208 provides space for the threaded rod 205 to slide in the inner cavity of the support rod 201, thus avoiding jamming when the movable rod 203 drives the threaded rod 205 to slide in the inner cavity of the support rod 201.

[0031] Reference Figure 3 The inner cavity of the sliding groove 213 is fixedly connected with four blocking blocks 204. The surface of the blocking blocks 204 is movably connected to the surface of the sliding block 212. By setting the blocking blocks 204, when the movable rod 203 drives the sliding block 212 to slide in the inner cavity of the support rod 201 and is in close contact with the blocking blocks 204, the sliding block 212 slides to the far position, thus preventing the sliding block 212 from detaching from the inner cavity of the support rod 201 when it slides in the inner cavity of the support rod 201.

[0032] Reference Figure 3 The bottom of the support rod 201 is fixedly connected to a snap-fit ​​post 209. The surface of the snap-fit ​​post 209 is movably connected to the inner cavity of the aluminum nitride ceramic substrate body 1. By setting the snap-fit ​​post 209, when the support rod 201 drives the snap-fit ​​post 209 to snap into the inner cavity of the aluminum nitride ceramic substrate body 1, the position of the support rod 201 will be limited, so that the support rod 201 will not shake on the surface of the aluminum nitride ceramic substrate body 1.

[0033] Working principle: When the spacing of the load plate body 4 needs to be adjusted and welded onto the resistor plate 3, firstly, the support rod 201 is moved, which drives the locking post 209 to lock into the inner cavity of the aluminum nitride ceramic substrate body 1. Then, the movable rod 203 is pulled, which drives the sliding block 212 to slide in the inner cavity of the support rod 201, thereby driving the threaded rod 205 to slide in the inner cavity of the movable groove 208, thereby driving the rotating block 202 to slide on the surface of the support rod 201. At the same time, the movable rod 203 will indirectly drive the threaded rod 205 and the movable block 207 to move. When the spacing of the movable block 207 needs to be adjusted, the rotating block 202 is rotated, which drives the threaded rod 205 to move. 05 rotates, and the surface of the threaded rod 205 is threadedly connected to the inner cavity of the limiting block 211. Since the position of the limiting block 211 is limited by the limiting groove 210, the limiting block 211 itself will not rotate, but will slide in the inner cavity of the movable rod 203. The limiting block 211 drives the movable block 207 to slide on the surface of the resistor sheet 3. At this time, the worker can use the angle formed by the movable rod 203 and the movable block 207 to position the load sheet body 4 that is about to be welded to the surface of the resistor sheet 3. When a row of load sheet bodies 4 are welded to the surface of the resistor sheet 3, the movable rod 203 is pushed upward. With the spacing of the movable blocks 207 unchanged, the load sheet bodies 4 are then welded upward on the surface of the resistor sheet 3.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An aluminum nitride ceramic substrate having an adjustable load sheet structure, comprising an aluminum nitride ceramic substrate body (1), characterized in that: The surface of the aluminum nitride ceramic substrate body (1) is fixedly connected with a resistance sheet (3), the surface of the resistance sheet (3) is welded with a load sheet body (4), and the surface of the aluminum nitride ceramic substrate body (1) is provided with an adjusting mechanism (2). The adjusting mechanism (2) comprises a supporting rod (201), the bottom of the supporting rod (201) is movably connected with the top of the aluminum nitride ceramic substrate body (1), the number of the supporting rod (201) is two, the inner sides of the two supporting rods (201) are movably connected with an activity rod (203), the surface of one of the supporting rods (201) is movably connected with a rotating block (202), the surface of the rotating block (202) is fixedly connected with a threaded rod (205), one end of the threaded rod (205) penetrates the inner cavity of the activity rod (203) and the outer side of the other supporting rod (201), the surface of the threaded rod (205) is screwedly connected with a limiting block (211), the number of the limiting block (211) is five, the surface of each limiting block (211) is fixedly connected with a movable block (207), and the surface of the movable block (207) is movably connected with the surface of the activity rod (203) and the resistance sheet (3).

2. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 1, characterized by: The inner cavity of the activity rod (203) is provided with a limiting groove (210), and the inner cavity of the limiting groove (210) is movably connected with the surface of the limiting block (211).

3. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 1, wherein: The surface of the limiting block (211) is fixedly connected with a limiting ring (206), and the surface of the limiting ring (206) is movably connected with the surface of one of the supporting rods (201).

4. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 1, wherein: The surface of the supporting rod (201) is provided with a sliding groove (213), and the inner cavity of the sliding groove (213) is movably connected with a sliding block (212), and the inner cavity of the sliding block (212) is movably connected with the surface of the limiting block (211).

5. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 1, wherein: The surface of the supporting rod (201) is provided with an activity groove (208), and the inner cavity of the activity groove (208) is movably connected with the surface of the limiting block (211).

6. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 4, wherein: The inner cavity of the sliding groove (213) is fixedly connected with a plug (204), the number of the plug (204) is four, and the surface of the plug (204) is movably connected with the surface of the sliding block (212).

7. The aluminum nitride ceramic substrate having an adjustable load sheet structure according to claim 1, wherein: The bottom of the supporting rod (201) is fixedly connected with a clamping column (209), and the surface of the clamping column (209) is movably connected with the inner cavity of the aluminum nitride ceramic substrate body (1).

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