A circuit board structure, a test system, and a circuit board

Abstract

The utility model discloses a circuit board structure, test system and circuit board, this circuit board structure is used for integrated circuit's loopback test, include: first substrate, first port, second port, third port and fourth port, first port, second port with third port set up in first side of first substrate, is used for connecting the port of integrated circuit, fourth port sets up in second side of first substrate, is used for connecting the port of main circuit board of bearing integrated circuit, first wiring and second wiring, set up in first substrate, wherein, first wiring connects first port with second port, second wiring connects third port with fourth port. The utility model can realize loopback test under the premise of not influencing main circuit board structure and function.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to a circuit board structure, a testing system, and a circuit board. Background Technology

[0002] Signal loopback testing is a testing method in communication systems that involves transmitting the signal from the transmitting end back to the receiving end through a channel, forming a closed-loop test link, to verify the integrity and stability of signal transmission and system performance. Signal loopback testing can be used to evaluate high-speed signals in circuits. Utility Model Content

[0003] This invention provides a circuit board structure, a testing system, and a circuit board to enable loopback testing of the main circuit board without affecting its structure and function.

[0004] In a first aspect, embodiments of the present invention provide a circuit board structure for loopback testing of integrated circuits, the circuit board structure comprising:

[0005] First substrate;

[0006] The first port, second port, third port, and fourth port are disposed on a first side of the first substrate and are used to connect to the ports of the integrated circuit. The fourth port is disposed on a second side of the first substrate and is used to connect to the ports of the main circuit board carrying the integrated circuit.

[0007] The first trace and the second trace are disposed within the first substrate;

[0008] The first trace connects the first port and the second port, and the second trace connects the third port and the fourth port.

[0009] Optionally, the circuit board structure further includes a fifth port, a sixth port, and a third trace, wherein the fifth port and the sixth port are disposed on a first side of the first substrate, the third trace is disposed within the first substrate, and the third trace connects the fifth port and the sixth port.

[0010] Optionally, the length of the third trace is the same as the length of the first trace.

[0011] Optionally, the circuit board structure further includes a seventh port, an eighth port, and a fourth trace, wherein the seventh port and the eighth port are disposed on a first side of the first substrate, the fourth trace is disposed within the first substrate, and the fourth trace connects the seventh port and the eighth port.

[0012] Optionally, the length of the fourth trace may be the same as or different from the length of the first trace.

[0013] Optionally, the second side of the first substrate is not provided with a port for connecting the first port and the second port to the main circuit board.

[0014] Optionally, the circuit board structure further includes:

[0015] The first connector connects the first trace and the first port;

[0016] The second connector connects the first trace and the second port.

[0017] Secondly, this utility model embodiment also provides a testing system for loopback testing of integrated circuits, the system comprising:

[0018] The adapter board includes the circuit board structure as described in this embodiment;

[0019] The main circuit board includes a main substrate and a connection port, wherein the connection port is disposed on a first side of the main substrate and connects to a fourth port of the circuit board structure, and the first side of the main substrate is opposite to the second side of the first substrate of the circuit board structure.

[0020] Thirdly, this utility model embodiment also provides a circuit board, which includes:

[0021] The first circuit board includes a circuit board structure as described in any of the embodiments herein;

[0022] The second circuit board includes a circuit board structure as described in any of the embodiments herein;

[0023] The first circuit board and the second circuit board are physically connected, and the lengths of the first traces on the first circuit board and the second circuit board are different.

[0024] Optionally, the first circuit board and the second circuit board are physically detachably connected.

[0025] The technical solution of this utility model allows for loopback testing of integrated circuits by setting up an adapter board in the test system for signal testing of the main circuit board without altering its design, and provides more wiring space for the main circuit board. Furthermore, since no additional resistors are required, the performance of the connection channel between the main circuit board and external devices is guaranteed. The second side of the first substrate of the adapter board is opposite to the first side of the main substrate of the main circuit board. By setting a first port and a second port on the first substrate of the adapter board, and connecting the first port and the second port through a first trace, signal testing is performed based on the first trace. This allows for loopback testing of the main circuit board without affecting its structure and function.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a testing system provided in an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of a test system carrying an integrated circuit under test provided by an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a circuit board structure provided in an embodiment of the present utility model;

[0031] Figure 4 This is a schematic diagram of a circuit board provided in an embodiment of the present invention. Detailed Implementation

[0032] To keep the drawings concise, the figures in the embodiments of this utility model only schematically show the parts related to the corresponding embodiments, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, some figures only schematically show some structures or components, and there may actually be more or fewer identical or similar structures or components.

[0033] The business scenarios described in this utility model embodiment are for illustrative purposes only and do not constitute a limitation on the technical solutions provided by this utility model embodiment. As those skilled in the art will know, with the evolution of technology and the emergence of new business scenarios, the technical solutions provided by this utility model embodiment are also applicable to similar technical problems.

[0034] In this invention, unless otherwise explicitly specified and limited, "connection" includes direct or indirect connection between objects: connected objects can be directly connected through a medium (e.g., wires, wiring, etc.), or indirectly connected through other components, or can be an internal connection. "Coupling" includes signal connection between objects, which can be achieved directly through a medium (e.g., wires, wiring, etc.), or through other components. "Grounding" includes direct grounding or indirect grounding; indirect grounding includes, for example, grounding through other components.

[0035] In this invention, unless otherwise explicitly specified and limited, ordinal numbers, such as "first" and "second," are used only to distinguish the objects being described and should not be construed as indicating or implying the relative importance or order between the objects being described. Furthermore, ordinal numbers do not represent the quantity of the objects being described. "Multiple" includes two or more, and other quantifiers are similar. "Or" and "and / or" are used to describe the relationship between objects, indicating a non-exclusive inclusion. For example, "A and / or B" or "A or B" can include: "A alone," "B alone," or "A and B." Similarly, "A, B, and / or C" or "A, B, or C" can include: "A alone," "B alone," "C alone," "A and B," "A and C," "B and C," or "A, B, and C." Additionally, the " / " in this invention is used to indicate an "or" relationship between preceding and following objects. The meaning of "one or more of A and B" or "at least one of A and B" in this invention is the same as the meaning of "A and / or B" or "A or B" above. "One or more of A, B and C" or "at least one of A, B and C" has the same meaning as "A, B and / or C" or "A, B or C" above.

[0036] When performing signal loopback testing on integrated circuits, the transmitting and receiving ends of the integrated circuit are connected via channels. The signal transmission performance of an integrated circuit may vary under different channels (e.g., channels of different lengths), therefore, signal loopback testing may be affected by the channel. In view of this, this invention provides a testing system, circuit board structure, and circuit board for loopback testing of integrated circuits.

[0037] Figure 1 This is a schematic diagram of a testing system provided in an embodiment of this utility model. Figure 1As shown, the test system 1 includes an adapter board 10 and a main circuit board 20.

[0038] The adapter board 10 may include a circuit board structure, which may include a substrate 101, ports 111, 112, 113, and 114. Ports 111, 112, and 113 are located on a first side of the substrate 101 and are used to connect to ports of an integrated circuit. Port 114 is located on a second side of the substrate 101 and is used to connect to a port of a main circuit board carrying the integrated circuit, such as port 211 of the main circuit board 20. The circuit board structure may also include traces 121 and 122 disposed within the substrate 101, wherein trace 121 connects ports 111 and 112, and trace 122 connects ports 113 and 114.

[0039] The traces on the adapter board (e.g., trace 121) can be used for loopback testing of integrated circuit signals. The length of the traces can be designed according to the channel length required for loopback testing without changing the main circuit board. If the adapter board includes traces for loopback testing, the main circuit board does not need to set traces for the same loopback test, thus reserving more wiring space.

[0040] The main circuit board 20 includes a main substrate 201 and a connection port 211. The connection port 211 is located on the first side of the main substrate 201 and connects to the port 114 of the adapter board 10. The first side of the main substrate 201 is opposite to the second side of the substrate 101 of the adapter board 10.

[0041] For substrate 101 and main substrate 201, the first side may include the top or upper side, i.e., the TOP (top) surface or TOP side, and the second side may include the bottom or lower side, i.e., the BOT (bottom) surface or BOT side. In addition, the first side and the second side may be distinguished based on the integrated circuit; the first side may be the side facing the integrated circuit, and the second side may be the side facing away from the integrated circuit.

[0042] Figure 2 A schematic diagram of a test system carrying an integrated circuit under test is shown. For substrate 101 and main substrate 201, the first side can be the side facing the integrated circuit 30, and the second side can be the side facing away from the integrated circuit 30.

[0043] Integrated circuit 30 may include a chip. The ports of integrated circuit 30 may include pins. (See reference...) Figure 1 and Figure 2Integrated circuit 30 includes ports 311, 312, and 313. The ports of integrated circuit 30 may include pins. Port 311 is connected to port 111, and port 312 is connected to port 112. Ports 311 and 312 can serve as the transmitting and receiving ports of a first signal, respectively. After being connected via ports 111 and 112 and trace 121, the first signal can complete loopback on the adapter board. Loopback testing of the signal can be completed based on ports 111, 112, and trace 121 on the adapter board. Port 313 is connected to port 113. Port 313 may include a port that is not used for loopback testing based on the adapter board. It can be connected to ports of the main circuit board 20 via port 113, trace 122, and port 114, for example, to port 211; and can be further connected to traces on the main circuit board 20.

[0044] In some embodiments, such as Figure 1 and Figure 2 As shown, the ports of the adapter board 10 and the main circuit board 20, and / or the ports of the adapter board 10 and the integrated circuit 30, can be connected by soldering (e.g., solder balls). However, the embodiments are not limited to this; the ports of the adapter board 10 and the main circuit board 20, and / or the ports of the adapter board 10 and the integrated circuit 30, can be connected by plugging or other detachable means.

[0045] In some embodiments, the circuit board structure further includes ports 115 and 116 and trace 123, wherein ports 115 and 116 are disposed on a first side of substrate 101, trace 123 is disposed within substrate 101, and trace 123 connects ports 115 and 116.

[0046] Integrated circuits can be loopback tested for multiple signals, and traces 121 and 123 on the adapter board can be used for loopback testing of multiple signals of integrated circuits.

[0047] In some embodiments, refer to Figure 1 and Figure 2 The integrated circuit 30 also includes ports 315 and 316. Port 315 is connected to port 115, and port 316 is connected to port 116. Ports 315 and 316 can be used as the transmitting port and receiving port of the second signal, respectively. After being connected through ports 115 and 116 and trace 123, the second signal can complete loopback on the adapter board. The loopback test of the signal can be completed based on ports 115 and 116 and trace 123 of the adapter board.

[0048] Optionally, the length of trace 123 is the same as the length of trace 121. Having the same trace length satisfies the loopback testing requirements for the corresponding data and clock signals. The corresponding signal can represent the clock signal used to indicate the clock reference for the data signal.

[0049] In some embodiments, the first signal may include a first data signal or a first clock signal. The second signal may include a first clock signal or a first data signal. When the first signal and the second signal are respectively the corresponding first data signal and first clock signal, the same length for traces 121 and 123 ensures that the channel lengths of the first signal and the second signal are the same during loopback testing.

[0050] In some embodiments, the circuit board structure further includes ports 117 and 118 and trace 124, wherein ports 117 and 118 are disposed on a first side of the first substrate 101, and trace 124 is disposed within the substrate 101 and connects ports 117 and 118.

[0051] In some embodiments, refer to Figure 1 and Figure 2 Integrated circuit 30 also includes ports 317 and 318. Port 317 is connected to port 117, and port 318 is connected to port 118. Ports 317 and 318 can be used as the transmitting port and receiving port of the third signal, respectively. After being connected through ports 117 and 118 and trace 124, the third signal can complete loopback on the adapter board. Based on ports 117 and 118 and trace 124 of the adapter board, the signal loopback test can be completed.

[0052] Optionally, the length of trace 124 may be the same as or different from the length of trace 121. The third signal may include a second data signal or a second clock signal, and the third signal is not a signal corresponding to the first signal. The first signal does not need to use the third signal as a clock reference, and the third signal does not need to use the first signal as a clock reference. The length of trace 124 may be the same as or different from the length of trace 121, but they do not need to be the same. If the length of trace 124 is the same as the length of trace 121, loopback testing of the first and third signals can be performed with the same channel length, thus unifying the testing standards. If the length of trace 124 is different from the length of trace 121, loopback testing of the first and third signals can be performed with different channel lengths, satisfying the different testing requirements of the first and third signals.

[0053] By configuring traces 121 and 123, loopback testing of different signal types with the same loopback length can be achieved; by configuring traces 121 / 123 and 124, loopback testing of the same or different signal types with different loopback lengths can be achieved. This allows for a comprehensive evaluation of the functionality and performance of high-speed signals in integrated circuits.

[0054] In some embodiments, the second side of the substrate 101 does not have ports for connecting ports 111 and 112 to the main circuit board 20. (Refer to...) Figure 1and Figure 2 Ports and solder balls that do not need to be set are represented by dashed lines.

[0055] Ports 111 and 112 are both located on the first side of substrate 101 and connected to each other via trace 121. The corresponding loopback test can be completed without the main circuit board, which can reduce the number of ports on the main circuit board for the signal loopback test section, prevent the traces on the main circuit board from introducing additional signal reflections, and ensure the reliability and stability of the loopback test.

[0056] The number of ports on the first side of substrate 101 for connection to integrated circuit 30 can be the same as the number of ports on integrated circuit 30. The number of ports on the first side of main substrate 201 for connection to integrated circuit 30 via adapter plate 10 can be less than the number of ports on integrated circuit 30.

[0057] In this invention, the number, location, and relative positional relationship of the ports are illustrative. For example, ports disposed on one side of substrate 101 and substrate 102 can be arranged in a two-dimensional array, such as in the x and y directions. As another example, ports 111 and 112 may not be directly adjacent to each other, but may have other ports disposed between them. Furthermore, ports 115 and 111 may have other ports disposed between them, or they may be directly adjacent.

[0058] In this invention, the connection relationship between the traces and the ports is only schematically shown, and the extension method of the traces is illustrative. For example, the trace 121 connecting the ports 111 and 112 arranged in the x-direction may include a portion extending in the x-direction and / or a portion extending in the y-direction.

[0059] The circuit board structure of this invention can improve the flexibility of loopback testing. Figure 3 This is a schematic diagram of a circuit board structure provided in an embodiment of the present invention. The circuit board structure 300 can be used in the adapter board 10. The circuit board structure 300 may include: a connector 141, connecting trace 121 and port 111; and a connector 142, connecting trace 121 and port 112. For clarity, in Figure 3 Only a portion of the circuit board structure 300 is shown in the diagram. Other structures of the circuit board structure 300 can be referred to the adapter board or circuit board structure in the above embodiments, and will not be described again.

[0060] Both connectors 141 and 142 may include resistors. Trace 121 is not directly connected to ports 111 and 112, but rather connected to ports 111 and 112 via connectors 141 and 142 respectively. During testing, connectors 141 and 142 can be configured on the circuit board structure as needed (e.g., soldered or plugged in) to select trace 121 as the loopback test trace for ports 111 and 112; conversely, if trace 121 is not selected as the loopback test trace for ports 111 and 112, the corresponding connectors can be omitted, thus improving the flexibility of loopback testing.

[0061] In some embodiments, the circuit board structure 300 may further include traces 121'. Connectors corresponding to traces 121' can be provided (see...). Figure 3 The dashed box indicates where connectors can be placed, allowing trace 121' to connect to ports 111 and 112 via the corresponding connectors; otherwise, connectors 141 and 142 are not set. By setting the corresponding connectors, trace 121 or 121' can be selected as the loopback test trace for ports 111 and 112, improving the flexibility of loopback testing.

[0062] Optionally, trace 121 and trace 121' have different lengths. During testing, corresponding connectors can be set on the circuit board structure to select traces of appropriate lengths based on the length requirements of loopback testing. The circuit board structure can be adapted to different channel length requirements for loopback testing. Additionally, although... Figure 3 The circuit board structure 300 is shown to include two trace lengths for loopback testing of ports 111 and 112. However, the embodiment is not limited to this, and the circuit board structure 300 may include three or more trace lengths for loopback testing of ports 111 and 112.

[0063] In loopback testing, different loopback test requirements can exist for the same signal / port of an integrated circuit, such as loopback test requirements for different channel lengths. Figure 3 As shown, different testing requirements can be provided by setting multiple traces and corresponding configurable connectors on the circuit board structure for the same signal / the same port. Alternatively, multiple circuit board structures can be used to provide different testing requirements, each including traces for loopback testing of the same signal / the same port of the integrated circuit, with different trace lengths.

[0064] Compared to the main circuit board, the adapter board is smaller in size, and multiple circuit board structures can be designed and manufactured on the same circuit board for the adapter board. The lengths of the traces for loopback testing of the same signals / ports of the integrated circuits in the multiple circuit board structures are different from each other.

[0065] For example, Figure 4 This is a schematic diagram of a circuit board provided in an embodiment of the present invention. Circuit board 400 may include circuit board 401 and circuit board 402. Circuit board 401 and circuit board 402 are physically connected, and the lengths of traces 1211 on circuit board 401 and traces 1212 on circuit board 402 are different. Circuit boards 401 and 402 may include the circuit board structure described in the above embodiment. For clarity, in... Figure 4 Only a portion of the structure of circuit boards 401 and 402 is shown in the diagram. The other structures of circuit boards 401 and 402 can be referred to the adapter board or circuit board structure in the above embodiments, and will not be described again.

[0066] Because the traces 1211 on circuit board 401 and 1212 on circuit board 402 have different lengths, circuit boards 401 and 402 can be used for loopback testing of different channel lengths. Circuit boards 401 and 402 are physically connected, allowing them to be panelized and simultaneously put into production without the need for separate production of circuit boards of different channel lengths, thus improving production efficiency and saving production costs.

[0067] Optionally, circuit boards 401 and 402 are physically detachably connected. Circuit boards 401 and / or 402 can be easily detached from circuit board 400 when it is used for loopback testing for corresponding channel lengths.

[0068] The circuit board 400 may also include a circuit board 403, which is physically connected to the circuit board 402, for example, physically detachable. The trace 1213 of the circuit board 403 is different in length from the trace 1211 of the circuit board 401 and the trace 1212 of the circuit board 402.

[0069] Optionally, the traces 1211 of circuit board 401 may include traces of a first length, which are short traces; the traces 1212 of circuit board 402 may include traces of a second length, which are medium-length traces; and the traces 1213 of circuit board 403 may include traces of a third length, which are long traces. However, the embodiments are not limited to this. Circuit board 400 may include two, three, or more circuit boards that are physically connected, and the circuit boards include traces of different lengths for loopback testing of the same signals / ports of integrated circuits.

[0070] In the above embodiments, the descriptions of different embodiments each have their own emphasis. Parts not described in detail or recorded in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Furthermore, the different embodiments above can be freely combined as needed. Moreover, with the evolution of technology, the elements described in this utility model can be replaced by equivalent elements that appear later in this utility model.

Claims

1. A circuit board structure, characterized in that, Loopback testing for integrated circuits includes: First substrate; The first port, second port, third port, and fourth port are disposed on a first side of the first substrate and are used to connect to the ports of the integrated circuit. The fourth port is disposed on a second side of the first substrate and is used to connect to the ports of the main circuit board carrying the integrated circuit. The first trace and the second trace are disposed within the first substrate; The first trace connects the first port and the second port, and the second trace connects the third port and the fourth port.

2. The circuit board structure according to claim 1, characterized in that, The circuit board structure further includes a fifth port, a sixth port, and a third trace, wherein the fifth port and the sixth port are disposed on the first side of the first substrate, the third trace is disposed within the first substrate, and the third trace connects the fifth port and the sixth port.

3. The circuit board structure according to claim 2, characterized in that, The length of the third trace is the same as the length of the first trace.

4. The circuit board structure according to any one of claims 1 to 3, characterized in that, The circuit board structure further includes a seventh port, an eighth port, and a fourth trace, wherein the seventh port and the eighth port are disposed on the first side of the first substrate, the fourth trace is disposed within the first substrate, and the fourth trace connects the seventh port and the eighth port.

5. The circuit board structure according to claim 4, characterized in that, The length of the fourth trace may be the same as or different from the length of the first trace.

6. The circuit board structure according to any one of claims 1 to 3, characterized in that, The second side of the first substrate does not have a port for connecting the first port and the second port to the main circuit board.

7. The circuit board structure according to any one of claims 1 to 3, characterized in that, The circuit board structure also includes: The first connector connects the first trace and the first port; The second connector connects the first trace and the second port.

8. A testing system, characterized in that, Loopback testing for integrated circuits includes: The adapter board includes the circuit board structure as described in any one of claims 1 to 7; The main circuit board includes a main substrate and a connection port, wherein the connection port is disposed on a first side of the main substrate and connects to a fourth port of the circuit board structure, and the first side of the main substrate is opposite to the second side of the first substrate of the circuit board structure.

9. A circuit board, characterized in that, include: The first circuit board includes the circuit board structure as described in any one of claims 1 to 7; The second circuit board includes the circuit board structure as described in any one of claims 1 to 7; The first circuit board and the second circuit board are physically connected, and the lengths of the first traces on the first circuit board and the second circuit board are different.

10. The circuit board according to claim 9, characterized in that, The first circuit board and the second circuit board are physically detachably connected.

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