Transmission module and test equipment

Abstract

The utility model relates to a transmission module and test equipment, the transmission module comprises a board card connector, an interface board connector and a flexible circuit board, one end of the flexible circuit board in the extension direction is connected with the board card connector, and the other end of the flexible circuit board is connected with the interface board connector. And the board card connector and the interface board connector realize signal transmission through at least one flexible circuit board. According to the technical scheme, the flexible circuit board is used for replacing a traditional cable to connect the board card connector and the interface board connector, the flexible circuit board has the advantages of being small in thickness, small in bending radius and the like, and the flexible circuit board is not prone to being damaged even if the flexible circuit board is greatly bent in a small wiring space. Moreover, a plurality of signal transmission channels can be printed on the flexible circuit board, and one flexible circuit board can realize the transmission function of a plurality of cables, so that the size of the transmission module can be reduced, and wiring is easier. Besides, the flexible circuit board has the characteristics of long transmission distance, low loss and the like in high-frequency signal transmission, and compared with a traditional cable, the high-quality high-frequency signal transmission requirement can be met.

Description

Technical Field

[0001] This application relates to the field of semiconductor testing technologies, and particularly to a transmission module and a testing device. Background Art

[0002] Semiconductor testing devices such as package testing machines, sorting testing machines, aging testing machines, etc. are usually configured with a transmission module to achieve signal transmission between the system control end and the device under test during the testing process. Generally, the system control end is configured with a test board, and the device under test is configured with a DUT (Device Under Test) interface board. The two ends of the transmission module are usually respectively configured with a board connector plugged into the test board and an interface board connector plugged into the DUT interface board.

[0003] Most transmission modules electrically connect the board connector and the interface board connector together through cables to achieve signal transmission between the two connectors. However, the space for cable routing on the testing device is limited, and other devices often need to be arranged in the routing space, making the cable routing crowded and easily bent and damaged, resulting in a significant reduction in signal transmission reliability. Moreover, as the number of testing channels increases, multiple cables often need to be connected between the same set of board connectors and interface board connectors. The increase in the number of cables makes the routing more crowded. In addition, as the signal frequency of the DUT interface board increases, conventional cables can no longer meet the transmission requirements of high-frequency signals. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a transmission module and a testing device for the problem that in a testing device, the transmission module uses cables for signal transmission, which not only makes the routing crowded and easily bent and damaged, thus reducing signal transmission reliability, but also cannot meet the requirements of high-frequency signal transmission.

[0005] In a first aspect, this application provides a transmission module, including:

[0006] A board connector;

[0007] An interface board connector; and

[0008] A flexible circuit board, one end in its extending direction is connected to the board connector, and the other end is connected to the interface board connector. The board connector and the interface board connector achieve signal transmission through at least one of the flexible circuit boards.

[0009] In some embodiments, at least one strip-shaped groove is formed in the flexible circuit board, and each strip-shaped groove is longitudinally arranged along the extending direction of the flexible circuit board and penetrates through the flexible circuit board in the thickness direction.

[0010] In some embodiments, the flexible circuit board includes a first end portion, a second end portion, and a middle section. The middle section is disposed adjacent to each other between the first end portion and the second end portion along the extending direction of the flexible circuit board. The first end portion and the second end portion are respectively connected to the board card connector and the interface board connector. The strip-shaped groove is disposed in the middle section.

[0011] In some embodiments, a constraint member is provided on the flexible circuit board. The constraint member is wound around the outer periphery of the flexible circuit board and is arranged around the extending direction of the flexible circuit board for bundling the area of the flexible circuit board where each strip-shaped groove is located.

[0012] In some embodiments, the flexible circuit board is welded to the board card connector; and / or, the flexible circuit board is welded to the interface board connector.

[0013] In some embodiments, the board card connector has a mounting groove. The notch of the mounting groove faces the flexible circuit board, and one end of the flexible circuit board is fixedly connected to the bottom of the mounting groove.

[0014] The edge of the groove wall of the mounting groove in the thickness direction of the flexible circuit board is configured as a rounded transition edge.

[0015] In some embodiments, one end of the flexible circuit board connected to the board card connector is the first end portion. The first end portion is bent to form a first folded edge, and the first folded edge is fixedly connected to the bottom of the mounting groove.

[0016] In some embodiments, the interface board connector has a mounting plane. One end of the flexible circuit board connected to the interface board connector is the second end portion. The second end portion is bent to form a second folded edge, and the second folded edge is fixedly connected to the mounting plane.

[0017] In a second aspect, the present application provides a testing device, including:

[0018] A first carrier platform;

[0019] A second carrier platform, supported by the first carrier platform and spaced from the first carrier platform to form a wiring space; and

[0020] A transmission module as described in any of the above embodiments. The board card connector is installed on the first carrier platform, the interface board connector is installed on the second carrier platform, and the flexible circuit board passes through the wiring space.

[0021] In some embodiments, the second carrier platform has a bearing surface facing away from the first carrier platform, and a through groove located on the bearing surface and penetrating the second carrier platform. The through groove communicates with the wiring space. The interface board connector is disposed on the bearing surface, and the flexible circuit board passes through the through groove and is connected to the interface board connector; and / or,

[0022] The test device further includes a support platform, which is located between the first carrier platform and the second carrier platform, and the wiring space penetrates through the support platform; the second carrier platform is supported on the first carrier platform via the support platform and is spaced apart from the support platform.

[0023] In the above transmission module and test device, a flexible circuit board is used to replace the traditional cable to connect the board card connector and the interface board connector. The flexible circuit board has characteristics such as a thin thickness and a small bending radius, and is not easily damaged even when it is greatly bent in a small wiring space. Moreover, multiple signal transmission channels can be printed on the flexible circuit board, and one flexible circuit board can realize the transmission functions of multiple cables. In this way, the volume of the transmission module can be reduced, and it is easier to route the wires. In addition, the flexible circuit board has characteristics such as a long transmission distance and low loss in high-frequency signal transmission. Compared with the traditional cable, it can meet the high-quality high-frequency signal transmission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0025] Figure 1 It is a schematic structural diagram of a transmission module according to some embodiments.

[0026] Figure 2 is Figure 1 a front view of the transmission module shown.

[0027] Figure 3 It is a schematic structural diagram of a flexible circuit board according to some embodiments.

[0028] Figure 4 is Figure 1 a partial schematic diagram of the transmission module shown.

[0029] Figure 5 is Figure 1 another partial schematic diagram of the transmission module shown.

[0030] Figure 6 It is a schematic structural diagram of a test device according to some embodiments.

[0031] The reference numerals in the specific embodiments are as follows:

[0032] 1000, test equipment; 100, transmission module; 10, board connector; 11, installation groove; 12, arc transition edge; 20, interface board connector; 21, installation plane; 30, flexible circuit board; 31, strip groove;

[0033] z1, first end; 32, first fold edge; z2, second end; 33, second fold edge; z3, middle section; 200, first carrier; 300, second carrier; k, routing space; m, bearing surface; 301, through groove; 400, support table. Specific embodiments

[0034] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the specific embodiments of the present application in detail with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0036] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly specified and defined, if used, the terms "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In this application, if used, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if used, when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0040] Regarding the problem in the test device that the transmission module uses cables for signal transmission, not only is the wiring crowded and easily bent and damaged, thus reducing the reliability of signal transmission, but also it cannot meet the requirements of high-frequency signal transmission. The embodiment of this application first proposes a transmission module.

[0041] Figure 1 It is a schematic structural diagram of the transmission module 100 for some embodiments.

[0042] According to some embodiments of this application, please refer to Figure 1 , the transmission module 100 provided by the embodiment of this application includes a board connector 10, an interface board connector 20, and a flexible circuit board 30. One end of the flexible circuit board 30 in the extending direction is connected to the board connector 10, and the other end is connected to the interface board connector 20. The board connector 10 and the interface board connector 20 achieve signal transmission via at least one flexible circuit board 30.

[0043] The board connector 10 is used to dock with the test board on the test device 1000, and those skilled in the art can make conventional selections according to the specifications of the test board. The interface board connector 20 is used to dock with the DUT interface board of the device under test, and those skilled in the art can make conventional selections according to the specifications of the DUT interface board.

[0044] The flexible circuit board 30 is a printed circuit board with better flexibility, featuring high wiring density, light weight, thin thickness, and good bendability. The flexible circuit board 30 usually extends in a strip shape, with one end in its extending direction fixed and signal-connected to the board connector 10, and the other end in its extending direction fixed and signal-connected to the interface board connector 20. The interface board connector 20 and the board connector 10 achieve signal transmission through the flexible circuit board 30, thereby realizing the signal transmission between the test board and the DUT interface board.

[0045] One or more flexible circuit boards 30 can be connected between the board connector 10 and the interface board connector 20 to increase the signal transmission channels.

[0046] In this embodiment, the flexible circuit board 30 is used to replace the traditional cable to connect the board connector 10 and the interface board connector 20. The flexible circuit board 30 has the characteristics of thin thickness and small bending radius, and is not easily damaged even when being bent greatly within a small routing space k. Moreover, multiple signal transmission channels can be printed on the flexible circuit board 30, and one flexible circuit board 30 can achieve the transmission functions of multiple cables, thus reducing the volume of the transmission module 100 and making it easier to route. In addition, the flexible circuit board 30 has the characteristics of long transmission distance and low loss in high-frequency signal transmission. Compared with the traditional cable, it can meet the high-quality high-frequency signal transmission requirements.

[0047] Figure 2 is Figure 1 the front view of the shown transmission module 100.

[0048] In some embodiments, referring to Figure 1 and Figure 2 , the flexible circuit board 30 is provided with at least one strip-shaped groove 31. Each strip-shaped groove 31 is longitudinally arranged along the extending direction of the flexible circuit board 30 and penetrates through in the thickness direction of the flexible circuit board 30.

[0049] The strip-shaped groove 31 can be a straight groove, a curved groove, etc. The strip-shaped groove 31 is usually arranged between adjacent signal channels on the flexible circuit board 30 without affecting the signal transmission of the flexible circuit board 30. Different frequency signal channels can be distributed by using the strip-shaped groove 31. The strip-shaped groove 31 can be formed on the flexible circuit board 30 by means such as slotting.

[0050] Specifically, a plurality of strip-shaped grooves 31 are formed in the flexible circuit board 30, and the plurality of strip-shaped grooves 31 are parallel to each other and arranged at intervals.

[0051] At this time, the arrangement of the strip-shaped grooves 31 makes the flexible circuit board 30 easier to bend and deform, and the wiring is more flexible. Moreover, in actual application, the area of the flexible circuit board 30 where the strip-shaped grooves 31 are located can be constrained and bundled into a bundle through a constraint member such as a winding tape, which helps to make the wiring of the flexible circuit board 30 more compact and the wiring more convenient.

[0052] Figure 3 It is a schematic structural diagram of the flexible circuit board 30 of some embodiments.

[0053] Specifically in the embodiment, refer to Figure 3 , the flexible circuit board 30 includes a first end portion z1, a second end portion z2, and a middle section z3. The middle section z3 is arranged adjacent to each other between the first end portion z1 and the second end portion z2 along the extending direction of the flexible circuit board 30. The first end portion z1 and the second end portion z2 respectively correspond to connecting the board card connector 10 and the interface board connector 20, and the strip-shaped grooves 31 are arranged on the middle section z3.

[0054] The area of the flexible circuit board 30 where the middle section z3 is located is easily bent during wiring. That is to say, the strip-shaped grooves 31 are arranged to avoid the two end regions of the flexible circuit board 30, and are only arranged in the area where the middle section z3 is located, which is beneficial to ensuring the connection strength between the flexible circuit board 30 and the board card connector 10 and the DUT interface connection.

[0055] Specifically in the embodiment, a constraint member (not shown) is provided on the flexible circuit board 30. The constraint member is wound around the outer periphery of the flexible circuit board 30 and arranged along the extending direction of the flexible circuit board 30, and is used to bundle the areas of the flexible circuit board 30 where the strip-shaped grooves 31 are located.

[0056] The constraint member can be a winding tape, a tape, etc. Through the constraint member, the areas of the flexible circuit board 30 where the strip-shaped grooves 31 are located can be constrained and bundled into a bundle, improving the strength of the flexible circuit board 30 and making the wiring of the flexible circuit board 30 neater.

[0057] In some embodiments, the flexible circuit board 30 is welded to the board card connector 10, and / or the flexible circuit board 30 is welded to the interface board connector 20.

[0058] Specifically, based on the reflow soldering process, the flexible circuit board 30 can be welded and connected to the board card connector 10 and / or the interface board connector 20 through solder pads.

[0059] At this time, the flexible circuit board 30 is welded and connected to the board card connector 10 and / or the interface board connector 20, which not only has high production efficiency but also has a reliable connection.

[0060] Of course, in other embodiments, the flexible circuit board 30 may also be fixedly connected to the board connector 10 and / or the interface board connector 20 by fastening or the like.

[0061] Figure 4 As Figure 1 a partial schematic view of the transmission module 100 shown.

[0062] In some embodiments, referring to Figure 4 , the board connector 10 has a mounting groove 11, the notch of the mounting groove 11 is arranged facing the flexible circuit board 30, and one end of the flexible circuit board 30 is fixedly connected to the bottom of the mounting groove 11. The edge of the groove wall of the mounting groove 11 in the thickness direction of the flexible circuit board 30 is configured as an arc transition edge 12.

[0063] Specifically, the first end portion z1 of the flexible circuit board 30 is welded and fixed to the bottom of the mounting groove 11. The arc transition edge 12 forms the groove wall of the mounting groove 11 and is located in the thickness direction of the flexible circuit board 30. In actual application, the first end portion z1 of the flexible circuit board 30 is likely to be bent in its thickness direction. At this time, the arc transition edge 12 is located in the bending direction of the first end portion z1, and the arc transition edge 12 can guide the first end portion z1 to be bent in a curved surface, effectively preventing the flexible circuit board 30 from being damaged by excessive bending due to pressure near the board connector 10.

[0064] In some embodiments, in combination with Figure 3 and Figure 4 , one end of the flexible circuit board 30 connected to the board connector 10 is the first end portion z1, and the first end portion z1 is bent to form a first folded edge 32 for fixedly connecting to the bottom of the mounting groove 11.

[0065] Preferably, the first end portion z1 has a first folded edge 32 bent toward the arc transition edge 12 in the thickness direction of the flexible circuit board 30, and the first folded edge 32 is adapted to be parallel to the bottom surface of the mounting groove 11 of the board connector 10. The first folded edge 32 is bent toward the arc transition edge 12 in the thickness direction of the flexible circuit board 30. By the first folded edge 32, the bent portion of the flexible circuit board 30 is separated from the arc transition edge 12, so that the bendability of the first end portion z1 of the flexible circuit board 30 becomes larger and it is not easily bent and damaged. Moreover, the first end portion z1 can be fixedly connected to the bottom of the mounting groove 11 (such as by welding) through the first folded edge 32, and the connection area between the two is large, and the connection is more reliable.

[0066] Specifically, fixing holes may be provided on the arc transition edge 12 of the board connector 10, and the board connector 10 is mounted on the test device 1000 by fasteners installed in the fixing holes.

[0067] Figure 5 As Figure 1Another partial schematic diagram of the transmission module 100 is shown.

[0068] In some embodiments, reference Figure 5 The interface board connector 20 has a mounting plane 21, and one end of the flexible circuit board 30 connected to the interface board connector 20 is the second end z2, and the second end z2 is bent to form a second folded edge 33 for fixed connection with the mounting plane 21. Preferably, the second end z2 is bent along the edge of the thickness direction of the flexible circuit board 30 away from the mounting plane 21 to form the second folded edge 33, and the second folded edge 33 is parallel to the mounting plane 21.

[0069] At this time, the second end portion z2 can be fixedly connected to the mounting plane 21 through the second folded edge 33 (such as welding), the connection area between the two is larger, and the connection is more reliable.

[0070] Specifically, a fixing hole may be provided on the edge of the mounting plane 21 of the interface board connector 20 , and the interface board connector 20 may be mounted on the test device 1000 by fasteners installed in the fixing holes.

[0071] In a specific embodiment, the transmission module 100 includes two flexible circuit boards 30, and the interface board connector 20 and the board card connector 10 are respectively welded to the two extended ends of each flexible circuit board 30. Strip grooves 31 are provided on the two flexible circuit boards 30. The first folded edges 32 of the two first ends z1 of the two flexible circuit boards 30 are bent in opposite directions, and the second folded edges 33 of the two second ends z2 of the two flexible circuit boards 30 are bent toward each other.

[0072] Figure 6 Schematic diagram of the structure of the testing device 1000 of some embodiments.

[0073] In addition, refer to Figure 6 The embodiment of the present application also provides a test device 1000, comprising a first carrier 200, a second carrier 300 and the transmission module 100 in the above embodiment. The second carrier 300 is supported on the first carrier 200 and is spaced from the first carrier 200 to form a wiring space k. The board connector 10 is mounted on the first carrier 200, the interface board connector 20 is mounted on the second carrier 300, and the flexible circuit board 30 passes through the wiring space k.

[0074] The test device 1000. Since the transmission module 100 signals to connect the board connector 10 and the interface board connector 20 via the flexible circuit board 30, and since the flexible circuit board 30 has characteristics such as a thin thickness and a small bending radius, it is not easily damaged even when being bent greatly within a relatively small wiring space k. Moreover, multiple signal transmission channels can be printed on the flexible circuit board 30, and one flexible circuit board 30 can achieve the transmission functions of multiple cables. In this way, the volume of the transmission module 100 can be reduced, and it is easier for the flexible circuit board 30 to route within the wiring space k. In addition, the flexible circuit board 30 has characteristics such as a long transmission distance and low loss in high-frequency signal transmission. Compared with traditional cables, it can meet the requirements for high-quality high-frequency signal transmission.

[0075] In addition, the test device 1000 also has other beneficial effects in the above embodiments, which will not be elaborated here.

[0076] The test device 1000 can be a semiconductor test device 1000 such as an aging test machine, a packaging test machine, a sorting test machine, etc. Generally, the test device 1000 is used to provide a test space for a device under test (such as a chip), and the interface board connector 20 is used to plug into the DUT interface board of the device under test. In addition, the test device 1000 usually further includes a test board (not shown), and the test board is plugged into the board connector 10, and the signal transmission between the DUT interface board and the test board is realized through the transmission module 100 to obtain the performance of the device under test during the test process.

[0077] In some embodiments, referring to Figure 6 , the second carrier 300 has a bearing surface m disposed away from the first carrier 200, and a through groove 301 located on the bearing surface m and penetrating the second carrier 300. The through groove 301 communicates with the wiring space k, the interface board connector 20 is disposed on the bearing surface m, and the flexible circuit board 30 passes through the through groove 301 and is connected to the interface board connector 20.

[0078] The bearing surface m is usually located in a horizontal plane. The through groove 301 is provided from top to bottom and communicates with the bearing surface m and the wiring space k. The through groove 301 can be an arc groove, an annular groove, etc. Usually, a plurality of interface board connectors 20 are installed on the bearing surface m, and the through groove 301 can expose a plurality of interface board connectors 20 at the same time.

[0079] The interface board connector 20 can be installed on the bearing surface m through a fastener, and its installation plane 21 faces the through groove 301. When the flexible circuit board 30 passes through the through groove 301, the second end portion z2 of the flexible circuit board 30 can be fixedly connected to the installation plane 21 without being bent, and the routing of the flexible circuit board 30 is more reliable.

[0080] In some embodiments, the testing device 1000 further includes a support platform 400. The support platform 400 is located between the first carrier platform 200 and the second carrier platform 300, and a wiring space k runs through the support platform 400. The second carrier platform 300 is supported by the first carrier platform 200 via the support platform 400 and is spaced apart from the support platform 400.

[0081] Specifically, a wiring hole is provided on the support platform 400, and the wiring hole serves as a partial space of the wiring space k. A gap can be provided both between the first carrier platform 200 and the support platform 400 and between the second carrier platform 300 and the support platform 400 to form the wiring space k. Preferably, the support platform 400 is vertically movable relative to the first carrier platform 200. For example, the support platform 400 is arranged on the first carrier platform 200 through a lifting cylinder. The specific solution for realizing the lifting of the support platform 400 is not limited herein, and those skilled in the art can make conventional settings. When the support platform 400 moves up and down relative to the first carrier platform 200, the second carrier platform 300 is synchronously driven to move up and down.

[0082] In practical applications, the support platform 400 can be used to support other structures such as cameras and air pipes. By setting the support platform 400 to be vertically movable, and thus realizing the vertical movement of the second carrier platform 300, the wiring space k can be enlarged when maintaining and installing the structures (such as the flexible circuit board 30 of the transmission module 100) in the wiring space k, facilitating the operation.

[0083] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0084] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A transmission module (100), characterized in that, Comprising: A board connector (10); An interface board connector (20); And A flexible circuit board (30), one end in its extending direction is connected to the board connector (10), and the other end is connected to the interface board connector (20), and the board connector (10) and the interface board connector (20) realize signal transmission via at least one said flexible circuit board (30).

2. The transmission module (100) according to claim 1, characterized in that, At least one strip-shaped groove (31) is formed in the flexible circuit board (30), each said strip-shaped groove (31) is longitudinally arranged along the extending direction of the flexible circuit board (30) and penetrates through in the thickness direction of the flexible circuit board (30).

3. The transmission module (100) according to claim 2, characterized in that, The flexible circuit board (30) includes a first end portion (z1), a second end portion (z2) and a middle section (z3), the middle section (z3) is arranged adjacent in the extending direction of the flexible circuit board (30) between the first end portion (z1) and the second end portion (z2), the first end portion (z1) and the second end portion (z2) are respectively connected to the board connector (10) and the interface board connector (20); the strip-shaped groove (31) is arranged in the middle section (z3).

4. The transmission module (100) according to claim 2, wherein The flexible circuit board (30) is provided with a constraint member, the constraint member winds around the outer periphery of the flexible circuit board (30) and is arranged around the extending direction of the flexible circuit board (30) for binding the area of the flexible circuit board (30) where each said strip-shaped groove (31) is located.

5. The transmission module (100) according to claim 1, characterized in that, The flexible circuit board (30) is welded to the board connector (10); and / or, the flexible circuit board (30) is welded to the interface board connector (20).

6. The transmission module (100) according to claim 1, characterized in that, The board connector (10) has a mounting groove (11), the notch of the mounting groove (11) faces the flexible circuit board (30), and one end of the flexible circuit board (30) is fixedly connected to the bottom of the mounting groove (11); The edge of the groove wall of the mounting groove (11) in the thickness direction of the flexible circuit board (30) is configured as an arc transition edge (12).

7. The transmission module (100) according to claim 6, characterized in that, One end of the flexible circuit board (30) connected to the board connector (10) is the first end portion (z1), the first end portion (z1) is bent to form a first folded edge (32), and the first folded edge (32) is fixedly connected to the bottom of the mounting groove (11).

8. The transmission module (100) according to claim 1, characterized in that, The interface board connector (20) has a mounting plane (21), one end of the flexible circuit board (30) connected to the interface board connector (20) is the second end portion (z2), the second end portion (z2) is bent to form a second folded edge (33), and the second folded edge (33) is fixedly connected to the mounting plane (21).

9. A test device (1000), characterized in that, Comprising: A first carrier (200); A second carrier (300), supported on the first carrier (200) and spaced from the first carrier (200) to form a wiring space (k); and The transmission module (100) according to any one of claims 1 to 8, wherein the board connector (10) is mounted on the first carrier (200), the interface board connector (20) is mounted on the second carrier (300), and the flexible circuit board (30) passes through the routing space (k).

10. The test device (1000) according to claim 9, characterized in that, The second carrier (300) has a bearing surface (m) disposed away from the first carrier (200), and a through groove (301) located on the bearing surface (m) and penetrating the second carrier (300). The through groove (301) communicates with the routing space (k). The interface board connector (20) is disposed on the bearing surface (m). The flexible circuit board (30) passes through the through groove (301) and is connected to the interface board connector (20); and / or, The test device (1000) further includes a support platform (400). The support platform (400) is located between the first carrier (200) and the second carrier (300), and the routing space (k) penetrates the support platform (400). The second carrier (300) is supported on the first carrier (200) via the support platform (400) and is spaced apart from the support platform (400).

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