High multi-layer staggered-layer riveted PCB (printed circuit board)

Abstract

The utility model discloses a high multi-layer staggered-layer riveted PCB (Printed Circuit Board), which comprises a plurality of layers of unit boards and at least one group of rivets, and the plurality of layers of unit boards are riveted and fixed through the rivets; every three adjacent layers of unit plates are fixed together through a group of rivets; and the plurality of groups of rivets are staggered with one another and are distributed at the edge position of the PCB at intervals. According to the high multilayer staggered-layer riveted PCB provided by the utility model, the technical problems of layer deviation and dislocation during riveting and pressing caused by excessive riveting layers in the riveting of the multilayer circuit board in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circuit board manufacturing, more particularly to a high multi-layer staggered riveting PCB. BACKGROUND

[0002] With the high-speed development of PCB industry, the circuit board is marching towards the direction of high multi-layer. The power type PCB has reached 18 layers, the inner layer copper thickness is 4oz, and the board thickness reaches 4-6mm. Due to the increase of single layer board thickness, single layer copper thickness and single layer board number, the height of ordinary alloy rivets is also increasing, which leads to the reduction of rivet fixing performance. During the pressing process of high multi-layer board, rivet breaking leads to a large number of pressing slip plates, layer deviation and misalignment, which directly results in scrap. There is no effective process control ability to solve the technical problem of the present art. SUMMARY

[0003] The utility model discloses a high multi-layer staggered riveting PCB, which aims to solve the technical problem of layer deviation and misalignment during riveting pressing due to too many riveting layers in the prior art.

[0004] The high multi-layer staggered riveting PCB provided by the utility model discloses a PCB board including a plurality of unit boards, and the plurality of unit boards are riveted and fixed.

[0005] Among them, the plurality of unit boards are N layers, N is an integer greater than or equal to 3, the N layers of unit boards are respectively the first layer board, the second layer board, the third layer board and the Nth layer board, the PCB board includes at least one group of rivets, one group of rivets includes two, and the two in one group of rivets are located on the opposite edges of the PCB board respectively, each group of rivets passes through at least two layers of unit boards to fix two layers of unit boards.

[0006] Among them, when N / 3=1, the N layers of unit boards are fixed by one group of rivets.

[0007] When N / 3 is greater than or equal to 1, the first layer board to the third layer board are fixed by one group of rivets, the Mth layer board to the M-2th layer board are fixed by one group of rivets until all the unit boards are riveted with each other, and 4≤M≤N.

[0008] A plurality of groups of rivets are staggered and distributed at the edge positions of the PCB board.

[0009] Among them, the PCB board includes a blank area arranged at the edge, and the rivets are installed in the blank area.

[0010] Among them, characterized in that, N=7.

[0011] Among them, the unit plates riveted by the same group of rivets do not exceed 4 layers.

[0012] The multi-layer staggered riveting PCB board disclosed in this utility model does not use all unit boards to be riveted together. Instead, all unit boards are divided into multiple layers, and every three adjacent unit boards are riveted together. When there are many unit board layers, it can ensure that the positioning of every three unit boards is accurate during the riveting process, without any offset or misalignment. This allows all the unit boards to be accurately riveted together and also prevents the rivets from breaking. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the PCB board stacking of this utility model;

[0014] Figure 2 This is a top view of the PCB board of this utility model. Detailed Implementation

[0015] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0016] Please refer to Figure 1 and Figure 2 The present invention provides a multi-layer staggered riveting PCB board 100, wherein the PCB board 100 includes multi-layer unit boards 10, and the multi-layer unit boards 10 are riveted and fixed.

[0017] The multi-layer unit board 10 has N layers, where N is an integer greater than or equal to 3; the N layers of unit boards 10 are respectively the 1st layer, the 2nd layer, the 3rd layer, and so on up to the Nth layer; the PCB board 100 includes at least one set of rivets 20, each set of rivets 20 including two (201, 202), and the two (201, 202) in the set of rivets 20 are respectively located on opposite sides of the PCB board 10; each set of rivets (201, 202) passes through at least two layers of unit boards 10 to fix the two layers of unit boards 10.

[0018] When N / 3=1, the Nth layer of unit plate 10 is fixed by a set of rivets 20.

[0019] When N / 3≥1, the first layer to the third layer are fixed by a set of rivets 20, and the Mth layer to the (M-2)th layer are fixed by a set of rivets 20 until all the unit plates 10 are riveted together, 4≤M≤N.

[0020] Multiple sets of rivets 20 are staggered and spaced apart at the edge of the PCB board 100; wherein the PCB board 100 includes a blank area 30 disposed at the edge, and the rivets are installed in the blank area 30.

[0021] In this utility model, the number of unit plates 10 riveted by the same group of rivets (201, 202) does not exceed 4 layers.

[0022] The multi-layer staggered riveting PCB board disclosed in this utility model does not use all unit boards to be riveted together. Instead, all unit boards are divided into multiple layers, and every three adjacent unit boards are riveted together. When there are many unit board layers, it can ensure that the positioning of every three unit boards is accurate during the riveting process, without any offset or misalignment. This allows all the unit boards to be accurately riveted together and also prevents the rivets from breaking.

[0023] When the number of unit board layers riveted by each rivet decreases, the length of the rivet also decreases accordingly, and the pressing height during pressing also decreases. Therefore, the external pressure that the rivet needs to withstand also decreases accordingly. Compared with multi-layer, such as 6-layer unit boards, the possibility of layer misalignment is further reduced, which can overcome the technical problems of layer misalignment and rivet breakage in the prior art. In this utility model, especially for PCB boards with 7 layers, the riveting positions and the number of rivet sets used for PCB boards with 7 or fewer unit boards are shown in Table 1 below:

[0024]

[0025] Table 1 Rivet Position Table

[0026] In Table 1, when the PCB board has three-layer unit boards, N=3. At this time, the three-layer unit boards can be directly riveted together by the first set of rivets.

[0027] When the PCB board has 5 unit boards, N=5, and the values ​​of M are 4 and 5 respectively. Therefore, during riveting, the first to third layers are fixed with the first set of rivets, and the second to fourth layers are fixed with the second set of rivets. Similarly, when the PCB board has 7 unit boards, N=7, and the values ​​of M are 4, 5, 6, and 7 respectively. Therefore, during riveting, the first to third layers are fixed with the first set of rivets, the second to fourth layers with the second set of rivets, the third to fifth layers with the third set of rivets, the fourth to sixth layers with the fourth set of rivets, and the fifth to seventh layers with the fifth set of rivets.

[0028] In this invention, although the number of rivets is increased, the number of unit plates riveted by each rivet is reduced, which can improve the stability of riveting and reduce layer misalignment.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A multi-layer staggered riveted PCB board, wherein the PCB board comprises multi-layer unit boards, the multi-layer unit boards being riveted and fixed together, characterized in that... The multilayer unit board has N layers, where N is an integer greater than or equal to 3; the N-layer unit boards are respectively the 1st layer board, the 2nd layer board, the 3rd layer board, and so on up to the Nth layer board; the PCB board includes at least one set of rivets, and each set of rivets includes two rivets, with the two rivets in each set located on opposite sides of the PCB board; Each set of rivets passes through at least two layers of the unit plate to secure the two layers of the unit plate; When N / 3=1, the Nth layer of unit plates is fixed by a set of rivets; When N / 3≥1, the first layer to the third layer are fixed by a set of rivets, and the Mth layer to the (M-2)th layer are fixed by a set of rivets until all the unit plates are riveted together, 4≤M≤N; The multiple sets of rivets are staggered and spaced apart at the edge of the PCB board.

2. The high-multilayer staggered riveting PCB board as described in claim 1, characterized in that, The PCB board includes a blank area at the edge, and the rivet is installed in the blank area.

3. The high-multilayer staggered riveting PCB board as described in claim 1, characterized in that, N=7。 4. The high-multilayer staggered riveting PCB board as described in claim 1, characterized in that, The number of unit plates riveted together by the same set of rivets does not exceed 4 layers.

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