Welding jig for full-page ceramic assembled metal enclosure frame

Abstract

According to the welding jig for the full-page ceramic assembled metal enclosure frame, a bottom groove is used for fixing a full-page ceramic wafer, the depth of the bottom groove does not exceed the thickness of the ceramic wafer, a pressure applying space is provided for a pressing block, a first locking hole is formed, the position relative to the pressing block is fixed through a positioning column, and the contact part of the pressing block and the enclosure frame is a pressure applying part; by means of the jig, the limitation of the current process can be overcome, the metal enclosure frame and the full-page ceramic wafer are assembled together so that the full-page ceramic wafer can be electroplated subsequently, the problem that a plating layer overflows in the current process is solved, and the packaging quality can be improved.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging application technology, specifically a welding fixture for assembling a whole ceramic metal frame. Background Technology

[0002] In today's semiconductor packaging industry, ceramic-metal is a common packaging form. In order to reduce the size, surface mount packaging has been developed. However, when manufacturing surface mount packaging, it is not possible to use the electroplating method with plating points on the pins. Only chemical plating can be used. Due to the influence of plating overflow, metal areas on the package that should not be connected become conductive or come into contact with the chip, which has an adverse effect on the packaging quality. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a welding fixture for assembling a metal frame from a single ceramic plate.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a welding fixture for assembling a metal frame from a whole ceramic plate, comprising a base, a pressure block, a positioning core, a positioning post, a frame, and a ceramic sheet, wherein the frame is combined with the ceramic sheet, the middle part of the base is provided with a bottom groove, the base is also provided with a plurality of first locking holes, the pressure block is provided with a plurality of pressure application parts and a second locking hole, and the second locking hole is arranged vertically corresponding to the first locking hole, and the positioning post can penetrate through the second locking hole and the first locking hole;

[0005] The ceramic sheet is placed inside the bottom groove. The positioning core is provided with a ceramic positioning part and a frame positioning part, and the ceramic positioning part is located in the middle part of the frame positioning part.

[0006] Furthermore, an improvement of this utility model is that the plurality of locking holes are respectively located on the periphery of the bottom groove, and the plurality of second locking holes are respectively located on the periphery of the plurality of pressure-applying parts.

[0007] Furthermore, an improvement of this utility model is that the multiple positioning posts have the same size and are all cylindrical structures.

[0008] Furthermore, the improvement of this utility model is that the cross-sections of the first locking hole and the second locking hole are both circular, and the diameters are the same.

[0009] Furthermore, an improvement of this utility model is that the length and width of the bottom groove are matched with the outer dimensions of the ceramic sheet, and the depth does not exceed the thickness of the ceramic sheet.

[0010] Furthermore, an improvement of this utility model is that the positioning core is also provided with a gripper.

[0011] Compared with the prior art, this utility model provides a welding fixture for assembling a metal frame from a single ceramic plate, which has the following advantages:

[0012] The bottom groove is used to fix the entire ceramic sheet, and its depth does not exceed the thickness of the ceramic sheet. It provides space for the pressure block to apply pressure. A first locking hole is provided, and the relative position of the pressure block and the positioning post is fixed. The part of the pressure block that contacts the frame is the pressure application part, which is used to apply pressure evenly to the frame to ensure that the frame and the ceramic sheet are firmly bonded during brazing. With the above-mentioned fixture, the limitations of the current process can be overcome, and the metal frame and the entire ceramic sheet can be assembled together so that the entire ceramic sheet can be electroplated in the future. This avoids the plating overflow problem in the current process and helps to improve the packaging quality. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the bottom groove and positioning core limiting structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the base structure in this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the pressure block in this utility model;

[0017] Figure 5 This is a schematic diagram of the positioning core in this utility model;

[0018] Figure 6 This is a schematic diagram of the positioning column in this utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the whole ceramic plate and the frame in this utility model;

[0020] In the figure: 1. Base; 11. Bottom groove; 12. First locking hole; 2. Pressure block; 21. Pressure application part; 22. Second locking hole; 3. Positioning core; 31. Ceramic positioning part; 32. Frame positioning part; 4. Positioning post; 5. Ceramic piece; 6. Frame. Detailed Implementation

[0021] 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 protection scope of the present utility model.

[0022] Please see Figure 1-7This utility model discloses a welding fixture for assembling a whole ceramic metal frame, including a base 1, a pressure block 2, a positioning core 3, a positioning post 4, a frame 6, and a ceramic sheet 5. The frame 6 is combined with the ceramic sheet 5. The middle part of the base 1 is provided with a bottom groove 11. The base 1 is also provided with a plurality of first locking holes 12. The pressure block 2 is provided with a plurality of pressure application parts 21 and a second locking hole 22. The second locking hole 22 is arranged vertically and vertically corresponding to the first locking hole 12. The positioning post 4 can penetrate the second locking hole 22 and the first locking hole 12.

[0023] The ceramic sheet 5 is placed inside the bottom groove 11. The positioning core 3 is provided with a ceramic positioning part 31 and a frame positioning part 32, and the ceramic positioning part 31 is located in the middle part of the frame positioning part 32.

[0024] In this embodiment, the plurality of locking holes 12 are located on the periphery of the bottom groove 11, and the plurality of second locking holes 22 are located on the periphery of the plurality of pressure-applying parts 21.

[0025] In this embodiment, the multiple positioning pins 4 are the same size and are all cylindrical structures. The cross-sections of the first locking hole 12 and the second locking hole 22 are both circular and have the same diameter.

[0026] In this embodiment, the length and width of the bottom groove 11 are matched with the outer dimensions of the ceramic sheet 5, and the depth does not exceed the thickness of the ceramic sheet 5.

[0027] In this embodiment, the positioning core 3 is also provided with a gripper.

[0028] The bottom groove 11 is used to fix the whole ceramic sheet 5, and its depth does not exceed the thickness of the ceramic sheet 5, providing space for the pressure block 2 to apply pressure;

[0029] The first locking hole 12 is provided, and the relative position of the positioning pin 4 to the pressure block 2 is fixed.

[0030] The part of the pressure block 2 that contacts the frame 6 is the pressure application part 21, which is used to apply pressure evenly to the frame 6 to ensure that the frame 6 and the ceramic sheet 5 are firmly bonded during brazing.

[0031] A second locking hole 22 is provided, which is fixed to the relative position of the base 1 by the positioning post 4;

[0032] The positioning core 3 is used to limit the relative position of the frame 6 and the corresponding ceramic cavity to ensure that the frame 6 will not be misaligned after welding. Specifically, the positioning core 3 has a ceramic positioning part 31, a frame positioning part 32 and a gripper part.

[0033] The length and width of the ceramic positioning part 31 are matched with the size of the ceramic cavity to fix the positioning core 3. A step is provided to prevent it from touching the bottom of the ceramic cavity, which would cause the frame positioning part 32 to be suspended and the position of the frame 6 to be uncontrollable.

[0034] The length and width of the frame positioning part 32 match the inner dimensions of the frame 6, thereby fixing the frame 6 in place;

[0035] The above two parts fix the relative positions of ceramic sheet 5, positioning core 3, and frame 6, ensuring the correct welding position;

[0036] The gripper part, which is only an extension of the frame positioning part 32, has no special size requirements and is used to provide a gripper for assembly and disassembly;

[0037] The dimensions of the positioning post 4 are adapted to the first locking hole 12 and the second locking hole 22 to fix the relative position of the base 1 and the pressure block 2, ensuring that the pressure block 2 can apply pressure evenly to the frame 6, which is made of metal.

[0038] The aforementioned fixture overcomes the limitations of current processes, allowing the metal frame and the entire ceramic sheet to be assembled for subsequent electroplating. This avoids the plating overflow problem present in current processes and helps improve packaging quality.

[0039] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A welding fixture for assembling a metal frame from a single ceramic plate, characterized in that: The device includes a base (1), a pressure block (2), a positioning core (3), a positioning post (4), a frame (6), and a ceramic sheet (5). The frame (6) is combined with the ceramic sheet (5). The middle part of the base (1) is provided with a bottom groove (11). The base (1) is also provided with a plurality of first locking holes (12). The pressure block (2) is provided with a plurality of pressure parts (21) and a second locking hole (22). The second locking hole (22) is arranged vertically and vertically corresponding to the first locking hole (12). The positioning post (4) can penetrate the second locking hole (22) and the first locking hole (12). The ceramic sheet (5) is placed inside the bottom groove (11). The positioning core (3) is provided with a ceramic positioning part (31) and a frame positioning part (32), and the ceramic positioning part (31) is located in the middle part of the frame positioning part (32).

2. The welding fixture for assembling a whole ceramic plate metal frame according to claim 1, characterized in that: The plurality of locking holes (12) are located on the periphery of the bottom groove (11), and the plurality of second locking holes (22) are located on the periphery of the plurality of pressure parts (21).

3. The welding fixture for assembling a whole ceramic plate metal frame according to claim 2, characterized in that: The multiple positioning posts (4) are the same size and are all cylindrical structures.

4. The welding fixture for assembling a whole ceramic plate metal frame according to claim 3, characterized in that: The cross-sections of the first locking hole (12) and the second locking hole (22) are both circular and have the same diameter.

5. The welding fixture for assembling a whole ceramic plate metal frame according to claim 4, characterized in that: The length and width of the bottom groove (11) are matched with the outer dimensions of the ceramic sheet (5), and the depth does not exceed the thickness of the ceramic sheet (5).

6. The welding fixture for assembling a whole ceramic plate metal frame according to claim 5, characterized in that: The positioning core (3) is also provided with a gripper.

Images