Test board and test system

Abstract

A test board and a test system are used for low-temperature testing of integrated circuits. The test board includes: a circuit board, including: a test circuit component, which is arranged on one side of the circuit board; and a mounting component, which is arranged on the other side of the circuit board and is configured as a fixture for mounting the integrated circuit, wherein the orthographic projection of the mounting component on the circuit board falls within the orthographic projection of the test circuit component on the circuit board; a reinforcing plate, which is configured to support and fix the circuit board, wherein the reinforcing plate includes a first hollow hole, wherein the orthographic projection of the first hollow hole on the circuit board covers the orthographic projection of the test circuit component on the circuit board, and a gas supply passage, which is substantially parallel to the circuit board, passes through at least a portion of the reinforcing plate, and is configured to blow dry gas into the test circuit component.

Description

Technical Field

[0001] The present disclosure relates to the technical field of integrated circuit testing, and in particular to a testing board and a testing system. Background Art

[0002] The field of integrated circuit testing technology is a core industry of the new generation of information technology industry. It has an extremely important strategic position and is one of the most important high-tech technologies to promote the development of national economy and social informatization. After integrated circuits, such as chips, are packaged, they need to undergo reliability testing, such as low-temperature environment testing, to detect the working performance of integrated circuits in low-temperature environments. Summary of the invention

[0003] Some embodiments of the present disclosure provide a test board for low-temperature testing of integrated circuits, the test board comprising:

[0004] Circuit board, including:

[0005] A test circuit assembly is disposed on one side of the circuit board; and

[0006] A mounting component, disposed on the other side of the circuit board, configured as a fixture for mounting the integrated circuit, wherein the orthographic projection of the mounting component on the circuit board falls within the orthographic projection of the test circuit assembly on the circuit board;

[0007] a reinforcing plate configured to support and fix the circuit board, the reinforcing plate comprising a first hollow hole, the orthographic projection of the first hollow hole on the circuit board covering the orthographic projection of the test circuit assembly on the circuit board, and

[0008] The gas delivery passage is substantially parallel to the circuit board, passes through at least a portion of the reinforcing plate, and is configured to blow dry gas into the test circuit assembly.

[0009] In some embodiments, the gas supply passage includes a gas supply pipe, a first through hole is opened on the side wall of the reinforcing plate, the gas supply pipe passes through the first through hole, one end of the gas supply pipe is located on the side of the side wall away from the first hollow hole, and the other end of the gas supply pipe is located in the first hollow hole.

[0010] In some embodiments, the reinforcing plate further includes a second hollow hole, the second hollow hole is located between the side wall and the first hollow hole, and the first through hole connects the outside with the second hollow hole.

[0011] The reinforcing plate further has a second through hole, and the second through hole communicates with the first hollow hole and the second hollow hole.

[0012] The gas delivery pipe passes through the first through hole and the second through hole so that the other end of the gas delivery pipe is located in the first hollow hole.

[0013] In some embodiments, the test board further comprises:

[0014] A sealing box is sealingly buckled on the reinforcing plate, the orthographic projection of the sealing box on the circuit board covers the orthographic projection of the first hollow hole on the circuit board, so that the first hollow hole is clamped by the circuit board and the sealing box to form a closed space,

[0015] There are multiple gas pipes, at least some of which are gas inlet pipes configured to input dry gas into the enclosed space, and at least some of which are gas outlet pipes configured to lead the gas out of the enclosed space.

[0016] In some embodiments, the reinforcing plate includes a reinforcing rib, which is adjacent to the first hollow hole and extends to the side wall of the reinforcing plate. A hollow channel is formed in the reinforcing rib. At least one air hole is formed on the side wall adjacent to the reinforcing rib and the first hollow hole. The air hole is connected to the hollow channel, and at least a portion of the hollow channel serves as at least a portion of the gas transmission passage.

[0017] In some embodiments, one end of the hollow channel is located on the side wall of the reinforcing plate to form a vent, which is configured to connect to a gas pipeline.

[0018] In some embodiments, the number of the air holes is multiple and evenly distributed on the side wall adjacent to the reinforcing rib and the first hollow hole.

[0019] In some embodiments, the test board further comprises:

[0020] A sealing box is sealingly buckled on the reinforcing plate, the orthographic projection of the sealing box on the circuit board covers the orthographic projection of the first hollow hole on the circuit board, so that the first hollow hole is clamped by the circuit board and the sealing box to form a closed space,

[0021] There are multiple reinforcing ribs, at least a portion of the hollow channels of the multiple reinforcing ribs are air inlet pipes configured to input dry gas into the enclosed space, and at least a portion of the hollow channels of the multiple reinforcing ribs are air outlet pipes configured to lead the gas out of the enclosed space.

[0022] In some embodiments, the dry gas includes at least one of dry air, dry nitrogen, or dry inert gas.

[0023] In some embodiments, the flow rate of the drying gas is inversely correlated with the provided temperature of the low temperature test.

[0024] Some embodiments of the present disclosure further provide a testing system, comprising the testing board described in the aforementioned embodiments.

[0025] Compared with the related art, the above solution of the embodiment of the present disclosure has at least the following beneficial effects:

[0026] By adding a gas transmission passage in the test board, dry gas is blown into the test circuit components in the circuit board in the test board, so that the test circuit components work in a dry environment, avoiding condensation of water droplets on the test circuit components due to low-temperature testing, affecting the working performance of the test circuit, extending the service life of the test board, and protecting the automatic testing machine.

[0027] By integrating the gas transmission passage into the reinforcement plate in the test plate, the volume occupied by the gas transmission passage is not increased, and the structure is stable, thereby ensuring the gas transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 A schematic diagram of the structure of a test system provided in some embodiments of the present disclosure;

[0030] Figure 2 A schematic diagram of the structure of a test board provided for some embodiments of the present disclosure;

[0031] Figure 3 A schematic diagram of the structure of a circuit board facing a reinforcing plate provided in some embodiments of the present disclosure;

[0032] Figure 4 A schematic diagram of the structure of a circuit board provided in some embodiments of the present disclosure, which is away from a reinforcing plate;

[0033] Figure 5 A schematic diagram of the structure of a reinforcement plate provided in some embodiments of the present disclosure;

[0034] Figure 6 A schematic diagram of the structure of a reinforcement plate provided in some other embodiments of the present disclosure;

[0035] Figure 7 A schematic diagram of the structure of a reinforcement plate provided in some other embodiments of the present disclosure;

[0036] Figure 8 A schematic diagram of the structure of a reinforcement plate provided in some other embodiments of the present disclosure;

[0037] Fig. 9 A schematic structural diagram of a reinforcement plate provided in some other embodiments of the present disclosure. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0039] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0040] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] It should be understood that although the terms first, second, third, etc. may be used to describe in the present disclosure, these should not be limited to these terms. These terms are only used to distinguish. For example, without departing from the scope of the present disclosure, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0042] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or device. In the absence of more restrictions, the elements defined by the sentence "comprises a" do not exclude the presence of other identical elements in the product or device including the elements.

[0043] The present disclosure provides a test board for low-temperature testing of integrated circuits, characterized in that the test board includes a circuit board and a reinforcing plate for supporting and fixing the circuit board, the circuit board includes: a test circuit component, which is arranged on one side of the circuit board; and a mounting component, which is arranged on the other side of the circuit board and is configured as a fixture for mounting the integrated circuit, and the orthographic projection of the mounting component on the circuit board falls within the orthographic projection of the test circuit component on the circuit board. The reinforcing plate is configured to support and fix the circuit board, and the reinforcing plate includes a first hollow hole, and the orthographic projection of the first hollow hole on the circuit board covers the orthographic projection of the test circuit component on the circuit board. The test board also includes a gas supply passage, which is substantially parallel to the circuit board, and the gas supply passage passes through at least a portion of the reinforcing plate and is configured to blow dry gas into the test circuit component.

[0044] The present invention adds a gas transmission passage in the test board, blows dry gas into the test circuit assembly in the circuit board in the test board, so that the test circuit assembly works in a dry environment, avoids condensation of water droplets at the test circuit assembly due to low temperature testing, affects the working performance of the test circuit assembly, prolongs the service life of the test board, and protects the automatic test machine. In addition, by integrating the gas transmission passage into the reinforcement plate in the test board, the volume occupied by the gas transmission passage is not increased, and the structure is stable, ensuring the gas transmission performance.

[0045] The optional embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0046] Figure 1 A schematic diagram of the structure of a test system provided in some embodiments of the present disclosure, such as Figure 1 As shown, the test system 100 includes an automatic tester 10 (ATE, Automatic Test Equipment), for example, an integrated circuit automatic tester. The automatic tester is used to detect the performance and function of an integrated circuit, such as a chip, and has a plurality of connection parts on its top surface for connecting with a test board to provide the test board with tester resources, i.e., various signals. The chip is, for example, an FBGA chip, a flash chip, etc.

[0047] The test board 20 is arranged on the top surface of the automatic test machine 10 and is connected to the automatic test machine. The test board 20 includes a circuit board 21 and a reinforcing plate 22 that supports and fixes the circuit board 21. The circuit board 21 is used to receive resources from the automatic test machine to test an integrated circuit to be tested, such as a chip. The circuit board 21 is, for example, a PCB board. The reinforcing plate 22 is used to support and fix the circuit board, so that the overall strength of the test board 20 is enhanced and it is not easy to deform, such as Figure 1 As shown, the stiffener 22 is located between the circuit board 22 and the automatic tester 10 when performing integrated circuit testing.

[0048] A fixture 40 may be installed on the side of the test board 20 away from the automatic test machine 10 . The fixture 40 is used to fix and connect the integrated circuit 50 to be tested. The fixture 40 has an interface for connecting the integrated circuit 50 and the circuit board 21 .

[0049] The test system 100 further includes a temperature regulating device 30, such as a heat flow hood, which can be buckled on the test board 20 to form a receiving space, and the fixture 40 on the test board 20 and the integrated circuit 50 fixed by the fixture 40 are received in the receiving space. The temperature regulating device 30 can adjust the temperature in the receiving space to provide a required temperature environment for the integrated circuit 50 to be tested, such as a low temperature environment, such as a low temperature environment of -20°C.

[0050] Figure 2 A schematic diagram of the structure of a test board provided for some embodiments of the present disclosure; Figure 3 A schematic diagram of the structure of a circuit board facing a reinforcing plate provided in some embodiments of the present disclosure; Figure 4 A schematic diagram of the structure of a circuit board provided in some embodiments of the present disclosure, which is away from a reinforcing plate; Figure 5 A schematic diagram of the structure of a reinforcement plate provided in some embodiments of the present disclosure.

[0051] like Figure 2-5 As shown, the test board 20 includes a circuit board 21 and a reinforcing plate 22 supporting the circuit board 21. The circuit board 21 includes a test circuit assembly 211, which is arranged on one side of the circuit board 21, for example, on the side facing the reinforcing plate 22. The test circuit assembly 211 converts the test signal provided by the automatic test machine 10 into a test signal required for testing the integrated circuit 50. The test board 20 also includes a mounting component 212, which is arranged on the other side of the circuit board, for example, on the side away from the reinforcing plate 22, and is configured as a fixture 40 for mounting the integrated circuit. The orthographic projection of the mounting component 212 on the circuit board 21 falls within the orthographic projection of the test circuit assembly 211 on the circuit board, that is, the test circuit assembly 211 occupies the same or larger area than the mounting component 212.

[0052] The reinforcing plate 22 is configured to support and fix the circuit board 21, and the reinforcing plate 22 includes a first hollow hole 221, and the orthographic projection of the first hollow hole 221 on the circuit board 21 covers the orthographic projection of the test circuit assembly 211 on the circuit board 21. That is, the area of ​​the first hollow hole 221 is the same as or larger than the area occupied by the test circuit assembly 211.

[0053] In other embodiments, Figure 3As shown, the circuit board 21 may further include a peripheral test circuit assembly 213, for example, arranged on both sides of the test circuit assembly 211 and spaced apart from the test circuit assembly 211. The peripheral test circuit assembly 213 is used to provide auxiliary test signals, for example, including relays, amplifiers, memories, etc. The circuit board 21 may further include a plurality of interface circuit assemblies 214, arranged on both sides of the test circuit assembly 211 and the peripheral test circuit assembly 213, and configured to receive resources of the automatic test machine, for example, electrically connected to the probe of the automatic test machine 10. Figure 3 As shown, on each side of the test circuit component 211 and the peripheral test circuit component 213, the interface circuit components 214 are arranged side by side, for example, in a row, and are spaced apart from each other.

[0054] Accordingly, in other embodiments, Figure 5 As shown, the reinforcing plate 22 also has a second hollow hole 222, corresponding to the peripheral test circuit component 213 on the circuit board 21, for example, arranged on both sides of the first hollow hole 221. The orthographic projection of the second hollow hole 222 on the circuit board 21 covers the orthographic projection of the corresponding peripheral test circuit component 213 on the circuit board 21. The reinforcing plate 22 also has a plurality of third hollow holes 223, corresponding one-to-one to the plurality of interface circuit components 214 on the circuit board 21, for example, arranged on both sides of the first hollow hole 221 and the second hollow hole 222, as shown in FIG. Figure 5 As shown, on each side of the first hollow hole 221 and the second hollow hole 222, the third hollow holes 223 are arranged side by side, for example, in a row, and are spaced apart from each other. In this case, the reinforcing plate 22 is basically a grid-like structure.

[0055] The inventor discovered that Figure 3-5 The test board 20 composed of the circuit board 21 and the reinforcing board 22 is applied to Figure 1 When the test system 100 shown in the figure performs a low temperature test on the integrated circuit 50, the temperature at the test circuit assembly 211 of the circuit board 21 is relatively low due to the relatively low temperature provided by the temperature adjustment device 30. Since the test circuit assembly 211 is located in the gap between the circuit board and the automatic test machine 10 and is exposed to the air, the relatively low temperature at the test circuit assembly 211 of the circuit board 21 may cause moisture in the air to condense on the test circuit assembly 211, thereby affecting the performance of the test circuit assembly and even damaging the automatic test machine 10.

[0056] In order to overcome the above problems, some embodiments of the present disclosure provide an improved test board 20. Figure 5 A gas transmission passage is added to the reinforcement plate shown. Figure 6 Schematic diagram of the structure of the reinforcement plate provided in some other embodiments of the present disclosure. Figure 2-4, as shown in FIG6 , the test board 20 further includes a gas supply passage 23, which is substantially parallel to the circuit board 21, and passes through at least a portion of the reinforcing plate 22, and is configured to blow dry gas into the test circuit assembly 211. The dry gas includes at least one of dry air, dry nitrogen, or dry inert gas. In this way, when performing a low-temperature test, even if the test circuit assembly 211 of the circuit board 21 has a lower temperature, no moisture or other liquid substances will condense, thereby ensuring the performance of the test circuit assembly 211 and protecting the automatic test machine 10.

[0057] In some embodiments, the flow rate of the dry gas is negatively correlated with the temperature provided by the low-temperature test, ensuring that the test circuit component 211 of the circuit board 21 is always in a dry gas environment.

[0058] Specifically, combined Figure 2-4 ,6, the gas supply passage 23 includes a gas supply pipe 231, and a first through hole 224 is opened on the side wall of the reinforcing plate 22. The gas supply pipe 231 passes through the first through hole 224. One end of the gas supply pipe 231, such as the air inlet end, is located on the side of the side wall away from the first hollow hole 221, and the other end of the gas supply pipe 231, such as the air outlet end, is located in the first hollow hole 221. The one end of the gas supply pipe 231 can be connected to the gas source, and dry air is blown into the test circuit component 211 in the first hollow hole 221 through the gas supply pipe 231 to avoid condensation of water vapor and the like. In this embodiment, the gas supply pipe 231 passes through at least a portion of the reinforcing plate 22 in parallel with the circuit board 21. Compared with the solution of adding an additional gas supply pipe between the reinforcing plate 22 of the test board 20 and the automatic testing machine 10 in the related art, the gas supply pipe 231 in this embodiment has a stable structure, and the distance between the test board 20 and the automatic testing machine 10 remains unchanged during the test, and no additional Figure 1 The space occupied by the test system 100 is shown, such as the height.

[0059] In some embodiments, Figure 6 As shown, as mentioned above, the reinforcing plate 22 also includes a second hollow hole 222, the second hollow hole 222 is located between the side wall and the first hollow hole 221, the first through hole 224 connects the outside with the second hollow hole 222, the reinforcing plate 22 also has a second through hole 225, the second through hole 225 connects the first hollow hole 221 and the second hollow hole 222, the air pipe 231 passes through the first through hole 224 and the second through hole 225 so that the other end of the air pipe 231 is located in the first hollow hole 221.

[0060] like Figure 6As shown, the number of the air pipes 231 is, for example, 2, which can be inserted into the reinforcing plate 22 from both sides of the reinforcing plate 22, such as the left and right sides as shown in the figure, to blow dry air into the test circuit component 211 in the first hollow hole 221. After the dry air fills the first hollow hole, it can overflow from the gap between the reinforcing plate 22 around the first hollow hole 221 and the automatic testing machine 10.

[0061] It can be understood by those skilled in the art that the technical solution disclosed in the present invention is not limited to Figure 6 In the embodiment shown, the gas delivery pipe 231 can also be Figure 6 The upper and lower sides of the reinforcing plate 22 shown in the figure are inserted into the reinforcing plate, and dry air is blown into the test circuit assembly 211 in the first hollow hole 221. The number of the air delivery pipes 231 is not limited to 1 or 2, and there can be more, and dry air can be blown into the test circuit assembly 211 in the first hollow hole 221 from multiple directions at the same time, ensuring that the test circuit assembly 211 in the first hollow hole 221 is quickly and evenly surrounded by dry air.

[0062] Figure 7 A schematic diagram of a structure of a reinforcement plate provided in some other embodiments of the present disclosure. In some embodiments, Figure 6 As shown in the reinforcement plate basis, Figure 2-4 As shown in FIG. 7 , the test board 20 further includes: a sealing box 24, which is sealingly fastened on the reinforcing plate 22, and the orthographic projection of the sealing box 24 on the circuit board 21 covers the orthographic projection of the first hollow hole 221 on the circuit board 21, so that the first hollow hole 221 is clamped by the circuit board 21 and the sealing box 24 to form a closed space. At this time, the number of the gas pipes 231 is multiple, and at least a part of the multiple gas pipes 231 is an air inlet pipe, which is connected to a gas source and configured to input dry gas into the closed space, and at least a part of the multiple gas pipes is an air outlet pipe, which is connected to a dry gas recovery device and configured to lead the gas out of the closed space. For example, Figure 7 As shown, there are two gas delivery pipes 231. The gas delivery pipe 231 on the left side is used as an air inlet pipe. Its end away from the first hollow hole 211 is connected to the gas source, and dry gas is input into the enclosed space, so that the test circuit assembly 211 located in the enclosed space is in a dry gas environment. The gas delivery pipe 231 on the right side is used as an air outlet pipe. Its end away from the first hollow hole 221 is connected to a dry gas recovery device. The dry gas recovery device can process the recovered dry gas, such as compressing it, and supply it to the gas source, thereby realizing the recycling of the dry gas and saving costs.

[0063] The above-mentioned embodiments provide a method of inserting the gas pipe into at least a portion of the reinforcing plate 22 as a gas passage. In other embodiments of the present disclosure, a method of directly utilizing at least a portion of the reinforcing plate 22 itself as a gas passage is also provided, which is described in detail below.

[0064] Figure 8 This is a schematic diagram of the structure of the reinforcement plate provided in some other embodiments of the present disclosure. Figure 2-4 As shown in FIG. 8 , the reinforcing plate 22 includes a reinforcing rib 25, the reinforcing rib 25 is adjacent to the first hollow hole 221 and extends to the side wall of the reinforcing plate 22, a hollow channel 251 is formed in the reinforcing rib 25, at least one air hole 252 is provided on the side wall adjacent to the reinforcing rib 25 and the first hollow hole 221, the air hole 252 is connected to the hollow channel 251, and at least a part of the hollow channel 251 serves as at least a part of the gas transmission passage 23. One end of the hollow channel 251 is located on the side wall of the reinforcing plate to form a vent 253, which is connected to the gas transmission pipeline 26, which is, for example, an outlet pipe of an air source, and dry air is blown into the test circuit assembly 211 in the first hollow hole 221 through the hollow channel 251 and the air hole 252 to avoid condensation of water vapor. In this embodiment, at least a portion of the hollow channel 251 is used as at least a portion of the gas delivery passage 23. Compared with the solution of adding an additional gas delivery pipeline between the reinforcing plate 22 of the test plate 20 and the automatic testing machine 10 in the related art, the internal structure of the reinforcing plate 22 is used as the gas delivery passage in this embodiment, and no additional gas delivery pipe is required. Moreover, the distance between the test plate 20 and the automatic testing machine 10 remains unchanged during the test, and no additional gas delivery pipe is required. Figure 1 The space occupied by the test system 100 is shown, such as the height.

[0065] In some embodiments, Figure 8 As shown, there are multiple air holes 252, which are evenly distributed on the side wall of the reinforcing rib 25 adjacent to the first hollow hole 221. Thus, dry air can be evenly blown into the test circuit assembly 211 in the first hollow hole 221.

[0066] like Figure 8 As shown, the number of reinforcing ribs 25 is, for example, 2, and they can be arranged on both sides of the first hollow hole 221, for example, on the left and right sides as shown in the figure. A hollow channel 251 is arranged in each reinforcing rib 25, and the hollow channels 251 are connected to the first hollow hole 221 through the air holes 252. Dry air is blown into the test circuit assembly 211 in the first hollow hole 221 from the left and right sides of the first hollow hole 221. After the dry air fills the first hollow hole, it can overflow from the gap between the reinforcing plate 22 around the first hollow hole 221 and the automatic testing machine 10.

[0067] It can be understood by those skilled in the art that the technical solution disclosed in the present invention is not limited to Figure 8 The embodiment shown, Figure 8 Hollow channels may also be provided in the adjacent reinforcing ribs on the upper and lower sides of the first hollow hole 221 of the reinforcing plate 22 shown in the figure, and air holes may also be provided on the side walls of the reinforcing ribs adjacent to the first hollow hole, and the air holes connect the corresponding hollow channels with the first hollow hole 211, so that dry air can be blown into the test circuit assembly 211 in the first hollow hole 221 through the air holes through the hollow channels. The number of reinforcing ribs provided with hollow channels is not limited to 1 or 2, and there may be more, and the hollow channels in the intersecting reinforcing ribs may be interconnected or not. In this way, dry air can be blown into the test circuit assembly 211 in the first hollow hole 221 from multiple directions at the same time, ensuring that the test circuit assembly 211 in the first hollow hole 221 is quickly and evenly surrounded by dry air.

[0068] Fig. 9 A schematic diagram of a structure of a reinforcement plate provided in some other embodiments of the present disclosure. In some embodiments, Figure 8 As shown in the reinforcement plate basis, Figure 2-4 As shown in Figure 7, the test board 20 also includes: a sealing box 24, which is sealingly fastened on the reinforcing plate 22, and the orthographic projection of the sealing box 24 on the circuit board 21 covers the orthographic projection of the first hollow hole 221 on the circuit board 21, so that the first hollow hole 221 is clamped by the circuit board 21 and the sealing box 24 to form a closed space. At this time, the number of the reinforcing ribs 25 with hollow channels is multiple, and at least a part of the hollow channels of the multiple reinforcing ribs is an air inlet pipe, which is connected to the gas source and configured to input dry gas into the closed space, and at least a part of the hollow channels of the multiple reinforcing ribs is an air outlet pipe, which is connected to the dry gas recovery device and configured to lead the gas out of the closed space. For example, Fig. 9 As shown, there are two reinforcing ribs 25 with hollow channels 251. The hollow channel 251 of the reinforcing rib 25 on the left side serves as an air inlet pipe, and one end thereof, such as the lower end, is connected to an air outlet pipe of the gas source, and dry gas is input into the enclosed space, so that the test circuit assembly 211 located in the enclosed space is in a dry gas environment. The hollow channel 251 of the reinforcing rib 25 on the right side serves as an air outlet pipe, and one end thereof, such as the lower end, is connected to an air inlet pipe of a dry gas recovery device. The dry gas recovery device can process the recovered dry gas, such as compressing it, and supply it to the gas source, thereby realizing the recycling of the dry gas and saving costs.

[0069] The present disclosure also provides a test system, including the test board described in any of the above embodiments. The specific structure can be found in Figure 1. The test system provided by the present disclosure adds a gas transmission passage in the test board, blows dry gas into the test circuit assembly in the circuit board in the test board, so that the test circuit assembly works in a dry environment, avoids condensation of water droplets on the test circuit assembly due to low-temperature testing, affects the working performance of the test circuit, extends the service life of the test board, and protects the automatic testing machine. In addition, by integrating the gas transmission passage into the reinforcement plate in the test board, the volume occupied by the gas transmission passage is not increased, and the structure is stable, ensuring the gas transmission performance.

[0070] Finally, it should be noted that: each embodiment in this specification is described by way of example, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0071] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A test board for low temperature testing of integrated circuits using an automatic tester, characterized in that , the test board comprises: Circuit board, including: A test circuit assembly is disposed on one side of the circuit board; and A mounting component, disposed on the other side of the circuit board, configured as a fixture for mounting the integrated circuit, wherein the orthographic projection of the mounting component on the circuit board falls within the orthographic projection of the test circuit assembly on the circuit board; a reinforcing plate configured to support and fix the circuit board, the reinforcing plate comprising a first hollow hole, the orthographic projection of the first hollow hole on the circuit board covers the orthographic projection of the test circuit component on the circuit board, and the first hollow hole exposes the test circuit component, and a gas delivery passage, substantially parallel to the circuit board, the gas delivery passage passing through at least a portion of the reinforcing plate, and configured to blow dry gas into the test circuit assembly; The reinforcing plate includes a reinforcing rib, which is adjacent to the first hollow hole and extends to the side wall of the reinforcing plate, a hollow channel is formed in the reinforcing rib, and at least one air hole is opened on the side wall adjacent to the reinforcing rib and the first hollow hole, and the air hole is connected to the hollow channel, and at least a part of the hollow channel serves as at least a part of the gas transmission passage; one end of the hollow channel is located on the side wall of the reinforcing plate to form an air vent, which is configured to connect the gas transmission pipeline; the number of the air holes is multiple, and they are evenly distributed on the side wall adjacent to the reinforcing rib and the first hollow hole.

2. The test board according to claim 1, wherein: The gas supply passage includes a gas supply pipe. A first through hole is opened on the side wall of the reinforcing plate. The gas supply pipe passes through the first through hole. One end of the gas supply pipe is located on the side of the side wall away from the first hollow hole, and the other end of the gas supply pipe is located in the first hollow hole.

3. The test board according to claim 2, wherein: The reinforcing plate further includes a second hollow hole, the second hollow hole is located between the side wall and the first hollow hole, and the first through hole connects the outside with the second hollow hole. The reinforcing plate further has a second through hole, and the second through hole communicates with the first hollow hole and the second hollow hole. The gas delivery pipe passes through the first through hole and the second through hole so that the other end of the gas delivery pipe is located in the first hollow hole.

4. The test board according to claim 2 or 3, wherein: The test board also includes: A sealing box is sealingly buckled on the reinforcing plate, the orthographic projection of the sealing box on the circuit board covers the orthographic projection of the first hollow hole on the circuit board, so that the first hollow hole is clamped by the circuit board and the sealing box to form a closed space, There are multiple gas pipes, at least some of which are gas inlet pipes configured to input dry gas into the enclosed space, and at least some of which are gas outlet pipes configured to lead the gas out of the enclosed space.

5. The test board according to claim 1, wherein: The test board also includes: A sealing box is sealingly buckled on the reinforcing plate, the orthographic projection of the sealing box on the circuit board covers the orthographic projection of the first hollow hole on the circuit board, so that the first hollow hole is clamped by the circuit board and the sealing box to form a closed space, There are multiple reinforcing ribs, at least a portion of the hollow channels of the multiple reinforcing ribs are air inlet pipes configured to input dry gas into the enclosed space, and at least a portion of the hollow channels of the multiple reinforcing ribs are air outlet pipes configured to lead the gas out of the enclosed space.

6. The test board according to claim 1 or 2, wherein: The dry gas includes at least one of dry air, dry nitrogen or dry inert gas.

7. The test board according to claim 1 or 2, wherein: The flow rate of the drying gas is inversely related to the provided temperature of the low temperature test.

8. A test system comprising the test board according to any one of claims 1 to 7.

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