JP4002935B2 - Device interface device - Google Patents

Description

[0001] The present invention relates to a device interface apparatus. In particular, the present invention relates to a device interface apparatus that provides a test signal for testing a device under test to the device under test and receives an output signal output from the device under test.

[0002] A test apparatus for testing an electronic device determines the quality of the electronic device by comparing the output signal of the electronic device with an expected value. The test apparatus performs input / output of signals to / from the electronic device by using, for example, a pin electronics boat provided in the test head.

[0003] In recent years, with the increase in the operating speed of electronic devices, the demand for speed on test equipment has also increased. However, a test apparatus that performs a test at a high speed is required to have high accuracy, and thus may be expensive. Therefore, conventionally, the test cost of the electronic device increases due to the influence of the price of the test apparatus, and it may be difficult to reduce the price of the electronic device.
Therefore, an object of the present invention is to provide a device interface apparatus that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

[0004] According to a first aspect of the present invention, there is provided a device interface apparatus for supplying a test signal for testing a device under test to the device under test and receiving an output signal output from the device under test. A pin electronics board having a driver for outputting the test signal and a comparator for sampling the output signal, and a board-side connector provided at an end of the pin electronics board, wherein the test signal and the output signal A board-side connector having a board-side core wire that transmits a transmission signal that is at least one of the signals, a board-side shield provided around the board-side core wire, and holding the device under test and the device under test A socket that contacts the terminal of the socket, and a socket provided in the socket A socket having a socket-side core wire that transmits the transmission signal to and from the device under test via the socket, and a socket-side shield provided around each of the socket-side core wires. Side connector, and a cable unit that transmits the transmission signal between the socket and the pin electronics board, the cable unit including a board fitting connector fitted to the board side connector, and the socket side A socket fitting connector to be fitted to the connector, and a transmission cable for transmitting the transmission signal between the board fitting connector and the socket fitting connector, and each transmission cable is connected to the board side By electrically connecting the core wire and the socket side core wire, the board side core wire and the socket side Provided is a device interface apparatus comprising: a transmission line that transmits the transmission signal to and from a line; and a cable shield that is electrically connected to the board side shield and the socket side shield and surrounds the periphery of the transmission line. .
[0005] The board-side connector includes a plurality of the board-side core wires and the board-side shield provided so as to surround each of the plurality of board-side core wires, and the socket includes the device under test. The socket-side connector has a plurality of socket-side core wires, and the socket-side shield provided so as to surround each of the plurality of socket-side core wires. The cable unit may include a plurality of the transmission cables.
[0006] The socket fitting connector further includes a connector holding portion that holds the socket fitting connector at a predetermined position to be opposed to the socket, and the socket side connector is provided with the socket fitting connector at the predetermined position. And may be fitted.
[0007] A mother board part including the cable unit and the connector holding part, and a detachable part having the socket and the socket side connector, wherein the socket side connector and the socket fitting connector are connected to the mother board part. Depending on whether or not to fit, a mechanically detachable part may be provided.
[0008] The attachment / detachment portion may be formed corresponding to a type of the device under test, and may be attached to the motherboard unit when the device under test of the corresponding type is tested.
[0009] A test head having the pin electronics board and the board-side connector is provided,
The mother board may be mechanically detachable with respect to the test head depending on whether or not the board side connector and the board fitting connector are fitted.
[0010] The board-side connector has a plurality of board-side shields that are electrically independent from each other in the board-side connector, each surrounding the circumference of each of the plurality of board-side core wires.
The cable shields in each of the plurality of transmission cables are electrically independent from each other between the board fitting connector and the socket fitting connector, and each of the plurality of board side shields is electrically It may be connected.
[0011] In the board fitting connector, the board fitting connector includes a plurality of transmission core wires connected to the transmission lines in each of the plurality of transmission cables, and a periphery of each of the plurality of transmission core wires in the board fitting connector. A plurality of transmission shields may be provided that are electrically independent from each other and connect each of the plurality of cable shields and each of the plurality of board-side shields.
[0012] The pin electronics board includes a signal wiring for transmitting the transmission signal and a plurality of grounded grounding wirings, and the board-side core wire is formed by extending linearly with a conductor. The shield is formed by a conductor that extends in the axial direction of the board side core wire and surrounds the board side core wire, and is electrically insulated from the board side core wire, and the board side connector is formed of the board side core wire. A signal electrode for connecting the substrate-side core wire and the signal wiring; and a substrate-side shield formed by extending from the substrate-side shield and facing each other across the signal electrode. And a plurality of ground electrodes that connect each of the plurality of ground wirings.
[0013] The socket-side connector includes a plurality of socket-side shields that surround each of the plurality of socket-side core wires and are electrically independent from each other in the socket-side connector, and the plurality of transmission cables. The cable shield in each of the plurality of sockets may be electrically independent from each other between the board fitting connector and the socket fitting connector, and may be electrically connected to each of the plurality of socket side shields. .
[0014] In the socket fitting connector, the socket fitting connector includes a plurality of transmission core wires connected to the transmission line in each of the plurality of transmission cables, and a periphery of each of the plurality of transmission core wires in the socket fitting connector. A plurality of transmission shields may be provided that are electrically independent from each other and connect each of the plurality of cable shields and each of the plurality of socket-side shields.
[0015] The socket includes a signal wiring for transmitting the transmission signal and a plurality of grounded grounding wirings. The socket-side core wire is formed by extending linearly with a conductor. The socket side core wire is formed by a conductor that is electrically insulated from the socket side core wire so as to extend in the axial direction of the socket side core wire and surround the socket side core wire, and the socket side connector extends from the socket side core wire The socket side core wire, the signal electrode for connecting the signal wiring, and extending from the socket side shield, facing each other across the signal electrode, the socket side shield, You may further have a some ground electrode which connects each of these ground wiring.
[0016] The board fitting connector surrounds the transmission core wire connected to the transmission line in the transmission cable and the periphery of the transmission core wire in the socket fitting connector, and the cable shield and the board side. When the board side connector and the board fitting connector are connected, the board side shield is connected before the board side core wire is connected to the transmission core wire. In contact with the transmission shield.
[0017] The socket fitting connector surrounds the transmission core wire connected to the transmission line in the transmission cable and the periphery of the transmission core wire in the socket fitting connector, and the cable shield and the board side. A transmission shield for connecting a shield, and when the socket side connector and the socket fitting connector are connected, before the board side core wire is connected to the transmission core wire, the socket side shield is In contact with the transmission shield.
[0018] Note that the above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

[0019] According to the present invention, the device under test can be appropriately tested.

[0020] FIG. 1 is a diagram showing an example of a configuration of a test apparatus 500 according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a detailed configuration of a device interface unit 510.
FIG. 3 is a diagram showing an example of a perspective view of a common motherboard 506 and a product type corresponding unit 508.
FIG. 4 is a conceptual diagram for explaining how to connect a product type corresponding unit 508 and a test head 504 to a common motherboard 506.
FIG. 5 is a diagram showing an example of detailed configurations of a connector 710, a connector 702, and a cable unit 708.
FIG. 6 is a diagram showing an example of the configuration of a test module 604.
FIG. 7 is a diagram showing a configuration of a plug connector 100.
FIG. 8 is a diagram showing an example of a detailed configuration of the plug signal terminal 10.
FIG. 9 is a diagram showing an example of a detailed configuration of the plug core wire shield 14 and the plug ground electrode 18.
FIG. 10 is a diagram showing an example of a detailed configuration of a plug-side substrate 200.
FIG. 11 is a cross-sectional view of the plug connector 100 taken along the line BB.
FIG. 12 is a diagram showing a configuration of a receptacle connector 300.
FIG. 13 is a diagram showing an example of the configuration of a receptacle connector 300.
FIG. 14 is a diagram showing an example of a detailed configuration of the receptacle signal core wire 22 and the receptacle core wire shield 24;
FIG. 15 is a diagram showing an example of a detailed configuration of the receptacle-side housing 60.
FIG. 16 is a diagram showing another example of the configuration of the receptacle connector 300.
FIG. 17 is a cross-sectional view showing a state in which the plug signal terminal 10 and the receptacle signal terminal 20 are fitted.
FIG. 18 is a diagram showing another example of the configuration of the plug signal terminal 30.

Explanation of symbols

[0021] 10 ... Plug signal terminal, 11 ... Projection, 12 ... Plug signal core wire, 14 ... Shield for plug core wire, 15 ... Stopper, 16 ... Plug signal electrode, 17 ... Insulating member, 18 ... Plug ground electrode, 19 ... Circular extension part, 20 ... Receptacle signal terminal, 22 ... Receptacle signal core wire, 23 ... Half circumference part, 24 ... Shield for receptacle core wire, 26 ... Receptacle signal electrode, 28 ... Receptacle ground electrode, 29 ... Semi-circular extension, 30 ... Plug signal terminal, 32 ... Plug signal core wire, 34 ... First shield 36 ... Projection part 37 ... Second shield 50 ... Plug-side housing 52 ... Positioning member 54 ... Through hole 56 ... Side surface 58 ...・ Protrusions, 60 ... Receptor side housing, 62 ... positioning hole, 64 ... housing portion, 66 ... housing through hole, 68 ... rivet, 100 ... plug connector, 200 ... plug side substrate, 202 ...・ Substrate signal line, 204... Substrate ground line, 250 .. receptacle side substrate, 252 .. substrate through hole, 260 .. receptacle side substrate, 262 .. substrate through hole, 300 .. receptacle Connector, 400 ... Coaxial cable, 500 ... Test device, 502 ... Main frame, 504 ... Test head, 506 ... Common motherboard, 508 ... Product type corresponding part, 510 ... Device Interface unit, 602... Casing, 604 .. test module, 606 .. holding table, 608... Connector holding unit, 610. Socket holder, 612 ... Socket, 614 ... Connector, 702 ... Connector, 704 ... Connector, 706 ... Cable, 708 ... Cable unit, 710 ... Connector, 722 ... Signal terminal, 724 ... Signal terminal, 726 ... Signal terminal, 728 ... Signal terminal, 732 ... Core wire, 734 ... Shield, 736 ... Core wire, 738 ... Shield, 740 ... core wire, 742 ... shield, 744 ... core wire, 746 ... shield, 750 ... device under test, 752 ... terminal, 754 ... transmission line, 756 ... shield, 802 ... Driver pin, 804 ... I / O pin, 806 ... Switch, 808 ... Switch, 810 ... Driver, 812 ... Resistance, 814 ... Comparator Data, 816 ... pin control unit

[0022] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and are combinations of features described in the embodiments. Not all are essential to the solution of the invention.
[0023] FIG. 1 shows an exemplary configuration of a test apparatus 500 according to an embodiment of the present invention. The purpose of this example is to provide a test apparatus that performs high-speed and high-accuracy signal input / output to the device under test 750 at a low cost. The test apparatus 500 includes a device interface unit 510 and a main frame 502. The device interface unit 510 includes a test head 504, a common motherboard 506, and a product type corresponding unit 508.
[0024] The test head 504 generates a test signal for testing the device under test 750, for example, in response to an instruction from the main frame 502, and outputs the test signal to the common motherboard 506. Further, the test head 504 receives the output signal of the device under test 750 via the common motherboard 506. For example, the test head 504 detects the value of this output signal and supplies it to the main frame 502. The device under test 750 is an electronic device (DUT) to be tested.
[0025] The common motherboard 506 is an example of a motherboard unit, and supplies a test signal received from the test head 504 to the product type corresponding unit 508. Further, the common motherboard 506 receives the output signal of the device under test 750 via the product type corresponding unit 508 and supplies it to the test head 504. In this example, the common motherboard 506 is commonly used for a plurality of types of devices under test 750 to be tested by the test apparatus 500.
[0026] The product type corresponding unit 508 places and fixes the device under test 750. Then, the product type corresponding unit 508 supplies the test signal received from the common motherboard 506 to the device under test 750. Further, the product type corresponding unit 508 receives the output signal of the device under test 750 and supplies it to the common motherboard 506. As a result, the device interface unit 510 fixes the device under test 750 and inputs / outputs signals to / from the device under test 750.
In this example, the product type corresponding unit 508 is formed corresponding to the product type of the device under test 750, and is used interchangeably according to the product type of the device under test 750. The product type corresponding unit 508 may be attached to the common motherboard 506 when the device under test 750 of the corresponding product type is tested. The product type corresponding unit 508 is an example of an attaching / detaching unit. According to this example, the device under test 750 of many types can be tested by exchanging the type corresponding unit 508.
[0028] The main frame 502 is, for example, a workstation or the like, and causes the test head 504 to output a test signal by giving a control signal to the test head 504. Further, the main frame 502 receives the value of the output signal of the device under test 750 from the test head 504, and determines whether the device under test 750 is good or bad by comparing it with an expected value, for example. Thereby, the main frame 502 manages the test for the device under test 750. According to this example, the device under test 750 can be appropriately tested. In another example, the test head 504 may determine pass / fail of the device under test 750. In this case, the main frame 502 may receive a pass / fail determination result from the test head 504.
FIG. 2 shows an example of a detailed configuration of the device interface unit 510. In this example, the test head 504 includes a housing 602 and a plurality of test modules 604. The housing 602 is a frame made of, for example, metal, and accommodates and holds a plurality of test modules 604 therein.
[0030] The plurality of test modules 604 are removably held in the housing 602. In this example, the test module 604 is a pin electronics board, generates a test signal to be given to the device under test 750 (see FIG. 1) in accordance with an instruction from the main frame 502, and generates the test signal as the common motherboard 506. Output to. The test module 604 receives the output signal of the device under test 750 from the common motherboard 506 and detects its value. The test module 604 may supply the detected value to the main frame 502.
[0031] In another example, some of the plurality of test modules 604 may have a function of a pattern generator, for example. In this case, the test module 604 having a pin electronics board function may output a test signal in response to a signal received from the test module 604 having a pattern generator function.
[0032] The common motherboard 506 includes a plurality of connector holding portions 608, a plurality of connectors 614, and a plurality of holding bases 606. Each of the plurality of connector holding portions 608 is disposed on the upper surface of the holding table 606, and fixes and holds the plurality of connectors 614. The plurality of connectors 614 are electrically connected to the product type corresponding unit 508 when the product type corresponding unit 508 and the common motherboard 506 are connected.
[0033] The plurality of holding bases 606 are electrically connected to the plurality of test modules 604 on the lower surface by being placed on the test head 504. Further, the holding table 606 is fixed by placing the connector holding portion 608 on the upper surface. In this case, the holding table 606 is electrically connected to the plurality of connectors 614. Therefore, when the common motherboard 506 and the test head 504 are connected, the holding base 606 electrically connects the plurality of test modules 604 and the plurality of connectors 614. As a result, the common motherboard 506 electrically connects the test head 504 and the product type corresponding unit 508.
[0034] The product type corresponding unit 508 includes a plurality of sockets 612 and a plurality of socket holding units 610. Each of the plurality of sockets 612 holds a device under test 750. Further, the socket 612 is electrically connected to the connector 614, thereby electrically connecting the connector 614 and the device under test 750.
[0035] Each of the plurality of socket holding units 610 fixes and holds the plurality of sockets 612. The socket holding unit 610 is disposed on the connector holding unit 608 to connect the plurality of sockets 612 and the plurality of connectors 614.
[0036] According to this example, the device under test 750 and the test head 504 can be appropriately connected. The device interface unit 510 may supply a test signal to the device under test 750 and receive an output signal output from the device under test 750. According to this example, the device under test 750 can be appropriately tested.
FIG. 3 shows an example of a perspective view of the common motherboard 506 and the product type corresponding unit 508. In this example, the common mother board 506 is divided into two parts, and has two holding bases 606a and b and two connector holding parts 608a and b. Thereby, the weight of the holding base 606 and the connector holding portion 608 per piece is reduced, and the operability of the common motherboard 506 is improved. Further, in this example, the connector holding unit 608 holds the plurality of connectors 614 by arranging them, for example, in rows at predetermined positions that should face the sockets 612.
[0038] The product type corresponding unit 508 includes four socket holding units 610a to 610d. The two socket holding portions 610a and 610b are placed on the connector holding portion 608a, and the two socket holding portions 610c and d are placed on the connector holding portion 608b.
[0039] The socket holding unit 610 holds a plurality of sockets 612, respectively. Each socket holding unit 610 may hold a different number of sockets 612, such as a socket holding unit 610a and a socket holding unit 610b.
[0040] Here, in this example, the socket holding unit 610 holds the plurality of sockets 612 at positions to face the plurality of connectors 614. In this case, by setting the position of the socket 612 in advance corresponding to the position of the connector 614, for example, even when the terminal arrangement of the device under test 750 (see FIG. 1) changes according to the product type, the common motherboard 506 can be used in common.
[0041] In recent years, with the diversification of applications, the types of electronic device packages have also diversified. In this case, if the connection between the test head 504 and the device under test 750 is changed for each product type of the device under test 750, for example, the test cost of the device under test 750 increases. However, according to this example, the device under test 750 of a plurality of types can be tested by exchanging the type corresponding unit 508 according to the type of the device under test 750, thereby reducing the cost of the test apparatus 500. it can. Further, this can reduce the cost of the device under test 750.
[0042] FIG. 4 is a conceptual diagram illustrating how the product type corresponding unit 508 and the test head 504 are connected to the common motherboard 506. Except for the points described below, in FIG. 4, the components denoted by the same reference numerals as those in FIG. 2 or 3 have the same or similar functions as those in FIG.
[0043] In the present example, the product type corresponding unit 508 includes a socket holding unit 610 (see FIG. 2), a socket 612, and a connector 710. The socket 612 holds the device under test 750 and is in contact with each terminal 752 of the device under test 750. The socket 612 is connected to the connector 710 by holding the connector 710 on the lower surface. In another example, the socket 612 may be connected to the connector 710 via a printed circuit board, for example.
[0044] The connector 710 is an example of a socket-side connector provided in the socket 612, and includes a plurality of signal terminals 728. Instead of this, the connector 710 may adopt a configuration including one signal terminal 728. Each signal terminal 728 is electrically connected to the terminal 752 of the device under test 750 via a wiring provided in the socket 612. The connector 710 may be provided in the socket 612 by being connected to the socket 612 via a printed circuit board.
[0045] The test head 504 includes a housing 602 (see FIG. 2), a test module 604, and a connector 702. The connector 702 is an example of a board-side connector provided at the end of the test module 604 and includes a plurality of signal terminals 722. Instead of this, the connector 702 may adopt a configuration including one signal terminal 722. For example, the signal terminal 722 is electrically connected to a driver or a comparator provided in the test module 604.
[0046] The common motherboard 506 includes a holding base 606, a connector holding portion 608, a connector 614, a connector 704, and a cable 706. The holding table 606 holds the connector 704 on the lower surface. The connector 614, the connector 704, and the plurality of cables 706 constitute a cable unit 708. Instead of this, the cable unit 708 may take a configuration including a connector 614, a connector 704, and one cable 706.
[0047] The connector 614 is an example of a socket fitting connector, and is fitted to the connector 710 when the common motherboard 506 and the product type corresponding unit 508 are connected. Accordingly, the product type corresponding unit 508 can be mechanically attached to and detached from the common motherboard 506 depending on whether or not the connector 710 and the connector 614 are fitted. Therefore, according to this example, it is possible to exchange the product type corresponding unit 508 in accordance with the change of the product type of the device under test 750, and test the device under test 750 of various types within the minimum necessary replacement range. Will be able to.
[0048] The connector 704 is an example of a board mating connector, and is mated with the connector 702 when the common motherboard 506 and the test head 504 are connected. Accordingly, the common motherboard 506 can be mechanically attached to and detached from the test head 504 depending on whether or not the connector 702 and the connector 704 are fitted.
[0049] Each of the plurality of cables 706 is an example of a transmission cable, and a transmission signal to be transmitted is transmitted between the connector 704 and the connector 614 by connecting the connector 704 and the connector 614. The transmission signal is at least one of a test signal and an output signal of the device under test 750, for example.
[0050] As a result, the cable unit 708 transmits a transmission signal between the socket 612 and the test module 604. Therefore, according to this example, the transmission signal can be appropriately transmitted between the test module 604 and the device under test 750.
[0051] Here, if the product type corresponding unit 508 and the common motherboard 506 are electrically connected, for example, by soldering, it is difficult to replace the product type corresponding unit 508 according to the product type of the device under test 750. Become. However, according to the present example, since the product type corresponding unit 508 and the common motherboard 506 are connected via the connector 710 and the connector 614, the product type corresponding unit 508 can be appropriately attached in a replaceable manner. The connector 710 is fitted with the connector 614 at a predetermined position where the connector 614 is provided. In this case, even when the types of devices under test 750 are different, the common motherboard 506 can be used in common. Accordingly, the test apparatus 500 (see FIG. 1) can appropriately test a plurality of types of devices under test 750.
[0052] Further, if one end or the other end of the cable 706 is connected to the product type corresponding unit 508 or the common mother board 506 by, for example, soldering, impedance mismatching occurs at this soldering position, for example. May not be transmitted properly. However, according to this example, the cable 706 is connected to the product type corresponding unit 508 and the test head 504 via the connector 614 and the connector 704. Therefore, according to this example, the transmission signal can be appropriately transmitted by matching the impedance in the connector 614 and the connector 704. Furthermore, by using the connector 614 and the connector 704, a plurality of cables 706 can be wired with high density.
[0053] The test head 504 may include a plurality of connectors 702 corresponding to the plurality of test modules 604. Further, the common motherboard 506 may have a plurality of cable units 708 corresponding to the plurality of connectors 702. The product type corresponding unit 508 may have a plurality of connectors 710 corresponding to the plurality of cable units 708.
[0054] The connectors 710, 614, 704, and 702 may have an impedance of about 50Ω. The connectors 710, 614, 704, and 702 preferably have a reflectance of about 3% or less with respect to a signal having a period of about 100 ps. It is preferable that the connector 710 and the connector 614 have durability that can be attached and detached about 5000 times or more. It is preferable that the connector 704 and the connector 702 have durability that can be attached and detached about 25000 times or more.
[0055] The signal terminals 728, 726, 724, and 722 may be provided with a signal density of, for example, about 0.45 mm 2 or more. The connection resistance between the signal terminal 728 and the signal terminal 726 and the connection resistance between the signal terminal 724 and the signal terminal 722 are preferably 85 mΩ or less. The cable 706 preferably has an impedance of about 49 to 51Ω and has an attenuation characteristic of −2 dB / m or less with respect to a signal of about 3 GHz.
[0056] In this case, for example, a high-speed signal of about 2.133 Gbps or higher can be appropriately transmitted. Further, the cable 706 can be wired at a density about 1.5 times or more higher than that in the case of using soldering. According to this example, the device under test 750 can be appropriately tested.
[0057] FIG. 5 shows an example of detailed configurations of the connector 710, the connector 702, and the cable unit 708. Except for the points described below, in FIG. 5, the components denoted by the same reference numerals as those in FIG. 4 have the same or similar functions as those in FIG.
[0058] In this example, the connector 710 includes a plurality of signal terminals 728. Each signal terminal 728 is a coaxial terminal and includes a core wire 744 and a shield 746. The core wire 744 is an example of a socket-side core wire, and is electrically connected to the terminal 752 of the device under test 750 (see FIG. 4) held in the socket 612 (see FIG. 4). As a result, the core wire 744 transmits a transmission signal to the device under test 750 via the socket 612. The shield 746 is an example of a socket side shield, and is provided so as to surround the core wire 744. In this case, each of the plurality of shields 746 corresponding to the plurality of signal terminals 728 is electrically independent from each other in the connector 710 and surrounds the periphery of the core wire 744 corresponding to the same signal terminal 728.
[0059] The connector 702 includes a plurality of signal terminals 722. Each signal terminal 722 is a coaxial terminal and includes a core wire 732 and a shield 734. The core wire 732 is an example of a board side core wire and is electrically connected to the test module 604. As a result, the core wire 732 transmits a transmission signal to and from the test module 604. The shield 734 is an example of a board-side shield, and is provided so as to surround the core wire 732. In this case, each of the plurality of shields 734 corresponding to the plurality of signal terminals 722 is electrically independent from each other in the connector 702 and surrounds the periphery of the core wire 732 corresponding to the same signal terminal 722. The shield 734 is connected to, for example, the test module 604 and is grounded in the test module 604.
[0060] The cable unit 708 includes a plurality of connectors 614 and 704 and a plurality of cables 706. The connector 614 has a plurality of signal terminals 726. Each signal terminal 726 is a coaxial terminal and includes a core wire 740 and a shield 742. The core wire 740 is an example of a transmission core wire. When the connector 710 and the connector 614 are fitted, the core wire 740 is connected to the core wire 744 and transmits a transmission signal to and from the core wire 744. The shield 742 is an example of a transmission shield, and is provided so as to surround the core wire 740. In this case, each of the plurality of shields 742 corresponding to the plurality of signal terminals 726 surrounds the periphery of the core wire 740 corresponding to the same signal terminal 726 in the connector 614 electrically independent from each other. The shield 742 is connected to the shield 746 when the connector 710 and the connector 614 are fitted.
[0061] The connector 704 has a plurality of signal terminals 724. Each signal terminal 724 is a coaxial terminal and includes a core wire 736 and a shield 738. The core wire 736 is an example of a transmission core wire. When the connector 704 and the connector 702 are fitted, the core wire 736 is connected to the core wire 732 and transmits a transmission signal to and from the core wire 732. The shield 738 is an example of a transmission shield, and is provided so as to surround the core wire 736. In this case, each of the plurality of shields 738 corresponding to the plurality of signal terminals 724 surrounds the periphery of the core wire 736 corresponding to the same signal terminal 724 in the connector 704 electrically independent from each other. The shield 738 is connected to the shield 734 when the connector 704 and the connector 702 are fitted.
[0062] The plurality of cables 706 connect the plurality of signal terminals 726 and the plurality of signal terminals 724 to each other. Each cable 706 includes a transmission line 754 and a shield 756.
[0063] One end and the other end of the transmission line 754 are connected to the core wire 740 and the core wire 736. Therefore, when each of the connector 614 and the connector 704 is fitted to each of the connector 710 and the connector 702, the transmission line 754 electrically connects the core wire 744 and the core wire 732. Accordingly, the transmission line 754 transmits a transmission signal between the core wire 744 and the core wire 732.
[0064] The shield 756 is an example of a cable shield. Each shield 756 in each of the plurality of cables 706 surrounds the periphery of the transmission line 754 in the same cable 706, electrically independent from each other between the connector 614 and the connector 704. One end and the other end of the shield 756 are connected to the shield 742 and the shield 738. Therefore, when each of the connector 614 and the connector 704 is fitted to the connector 710 and the connector 702, the shield 756 is electrically connected to the shield 746 and the shield 734.
[0065] As described above, in the cable unit 708, the core wire 740 in each signal terminal 726 is connected to the transmission line 754 in each of the plurality of cables 706, respectively. Further, the core wire 736 in each signal terminal 724 is connected to the transmission line 754 in each of the plurality of cables 706.
[0066] In addition, the shield 742 in each signal terminal 726 connects the shield 756 in each of the plurality of cables 706 and each of the plurality of shields 746, respectively. The shield 738 in each signal terminal 724 connects each of the plurality of shields 756 and each of the plurality of shields 734.
[0067] Thereby, the test apparatus 500 (see FIG. 1) of this example transmits a transmission signal while maintaining a coaxial structure between the test module 604 and the terminal 752. Therefore, according to this example, a signal can be transmitted between the test module 604 and the device under test 750 with high accuracy. Thereby, the test of the device under test 750 can be performed with high accuracy.
[0068] In this example, one of the signal terminal 728 and the signal terminal 726 is a male terminal, and the other is a female terminal. One of the signal terminal 724 and the signal terminal 722 is a male terminal, and the other is a female terminal. According to this example, the test module 604 and the device under test 750 can be appropriately connected.
[0069] FIG. 6 illustrates an exemplary configuration of the test module 604, along with the cable 706 and socket 612. FIG. Except for the points described below, in FIG. 6, the configurations denoted by the same reference numerals as those in FIG. 4 or 5 have the same or similar functions as the configurations in FIG. In this example, the test module 604 includes a driver pin 802, an I / O pin 804, and a pin control unit 816. Test module 604 may include a plurality of driver pins 802 and / or a plurality of I / O pins 804.
[0070] The driver pin 802 includes a driver 810, a resistor 812, and a plurality of switches 806, 808. The driver 810 outputs a test signal in response to an instruction from the pin control unit 816. In this example, the driver 810 provides a test signal to the terminal 752a of the device under test 750 via the switch 806 and the cable 706a. The terminal 752a may be an input terminal of the device under test 750.
[0071] The switch 806 is provided between the output terminal of the driver 810 and the connector 702, and switches whether to output the output of the driver 810 to the cable 706a. For example, the switch 806 is turned on and off in accordance with an instruction from the pin control unit 816, thereby determining the timing for supplying a test signal to the device under test 750. Thereby, the driver pin 802 supplies, for example, a test pattern corresponding to the test signal to the device under test 750.
[0072] The switch 808 is connected to the terminal 752a via the cable 706b. As a result, the switch 808 receives the test signal output from the driver 810 via the plurality of cables 706a and 706b. The switch 808 gives the received test signal to the other end of the resistor 812 whose one end is grounded. Accordingly, the driver pin 802 is connected to the terminal 752a by a DTL (Dual Transmission Line) wiring. In this case, the test signal can be transmitted with high accuracy by reducing the reflection of the test signal at the terminal 752a. Thereby, the timing which gives a test signal can be controlled with high precision. Note that the switch 808 is turned on and off in response to an instruction from the pin control unit 816 in synchronization with the switch 806, for example.
[0073] The I / O pin 804 includes a driver 810, a resistor 812, a plurality of switches 806, 808, and a comparator 814. In the I / O pin 804, each of the switch 806 and the switch 808 is connected to the terminal 752b of the device under test 750 via each of the plurality of cables 706c, d. The terminal 752b may be an input / output terminal of the device under test 750. The driver 810 provides a test signal to the terminal 752b through the switch 806 and the cable 706c.
[0074] The comparator 814 receives an output signal output from the device under test 750 to the terminal 752b via the cable 706d and the switch 808, and samples the output signal. Then, the comparator 814 gives the sampled value to the pin control unit 816. As a result, the I / O pin 804 detects the value of the output signal of the device under test 750.
Note that the switch 808 is turned on, for example, when the driver 810 outputs a test signal and when the comparator 814 samples the output signal of the device under test 750. In other respects, the driver 810, the resistor 812, and the plurality of switches 806, 808 in the I / O pin 804 have the same or similar functions as the driver 810, the resistor 812, and the plurality of switches 806, 808 in the driver pin 802. May be included.
[0076] The pin control unit 816 causes the driver 810 to output a test signal in response to an instruction from the main frame 502, for example. Further, the pin control unit 816 receives the value sampled by the comparator 814 and supplies it to the main frame 502. According to this example, it is possible to appropriately input / output signals to / from the device under test 750.
[0077] In recent years, the operating speed of electronic devices has increased, and there is a need for higher performance transmission lines. According to this example, by using a plurality of connectors 702, 704, 614, and 710 (see FIG. 5), the cable 706 can be mounted with high density, so that there is a margin in the number of wirings. Alternatively, the I / O pin 804 and the device under test 750 can be connected by the DTL wiring. In this case, the reflection at the terminal 752 can be reduced, and the test signal can be supplied appropriately. Therefore, according to this example, the device under test 750 can be tested with high accuracy.
[0078] FIG. 7 shows a configuration of a plug connector 100 as an example of the connector 702 (see FIG. 5). One end of the plug connector 100 is connected to the receptacle-side connector, and the other end is mounted on one side of the plug-side substrate 200, whereby an electrical signal is transmitted between the receptacle-side connector and the plug-side substrate 200. Relay. In this example, the receptacle-side connector is a connector 704 (see FIG. 5). The plug-side substrate 200 is a test module 604 (see FIG. 5).
[0079] The plug-side substrate 200 has a plurality of substrate signal lines 202 that transmit signals, and a grounded substrate ground line 204. The substrate signal line 202 is an example of a signal wiring that transmits a transmission signal, and the substrate ground line 204 is an example of a ground wiring. The plug connector 100 includes a plug-side housing 50 and a plurality of plug signal terminals 10. In this example, the plug signal terminal 10 is used as a signal terminal 722 (see FIG. 5).
[0080] FIG. 7A shows the plug connector 100 as seen from the direction perpendicular to the front surface of the plug-side substrate 200. FIG. FIG. 7B shows the plug connector 100 when viewed from the direction perpendicular to the connector joint surface, which is the joint surface with the receptacle-side connector. In this figure, the plug side housing 50a and the plug side housing 50b are overlapped. FIG.7 (c) shows the plug side housing 50a when it sees from the A direction shown by the arrow in FIG.7 (b).
[0081] The plug-side housing 50 is formed by extending substantially shorter than the length of the plug signal terminal 10 substantially vertically from the upper surface with a substantially rectangular surface formed substantially parallel to the connector joint surface. The plug-side housing 50 has a plurality of through holes 54, two positioning members 52, two side surfaces 56, and a plurality of convex portions 58.
[0082] The plurality of through holes 54 are formed so as to penetrate substantially in a cylindrical shape from the upper surface of the plug-side housing 50 in a direction substantially perpendicular to the rear surface of the upper surface. Each of the plurality of plug signal terminals 10 is inserted into the through hole 54. Thereby, the plug-side housing 50 holds a plurality of signal terminals.
[0083] Further, the plurality of through holes 54 are arranged in a row at substantially equal intervals in a predetermined arrangement direction on the upper surface of the plug-side housing 50. The plurality of through holes 54 form a first row and a second row, which are two rows parallel to each other. Accordingly, the plug-side housing 50 holds at least a part of each of the plurality of signal terminals 10 in a first row and a second row that are parallel to each other.
[0084] Further, the plurality of through-holes 54 are arranged in the second row on a substantially perpendicular bisector connecting the respective approximate centers of two adjacent through-holes 54 formed in the first row. A staggered arrangement is formed in which approximately the center of one through hole 54 is arranged. As a result, the plug-side housing 50 holds the plurality of signal terminals 10 in two rows in a staggered arrangement in which the first row and the second row are parallel to each other. In the drawing, the plug-side housing 50 holds several plug signal terminals 10 at both ends of the first row and the second row, respectively.
[0085] The two side surfaces 56 are formed in the plug-side housing 50 in parallel with the axial direction and the arrangement direction of the plug signal terminals 10, respectively. The side surface 56 includes a plurality of convex portions 58. The plurality of protrusions 58 protrude in a direction perpendicular to the side surface 56 so as to surround the plug signal terminal 10 at each position where the plurality of plug signal terminals 10 are held, and extend in the axial direction of the plug signal terminal 10. Formed. Thereby, the side surface 56 is formed in a corrugated shape having irregularities. The recess formed in the gap between the adjacent protrusions 58 accommodates the protrusion of the protrusion 58 formed in the other plug-side housing 50. The convex portion 58 and the dent may be formed in a trapezoidal shape, a rectangular shape, a curved surface shape, or the like.
[0086] Furthermore, in this example, the plug-side housing 50 holds the same number of signal terminals 10 side by side in the first row and the second row, respectively. Thus, the two plug-side housings 50 can be appropriately overlapped by engaging the corrugated irregularities formed on the respective side surfaces 56.
[0087] The two positioning members 52 are adjacent to the plug signal terminals 10 arranged at one ends of the first row and the second row, respectively, and are opposed to each other with the plurality of plug signal terminals 10 interposed therebetween. The plug signal terminals 10 are provided so as to protrude from the surface of the plug-side housing 50 in the axial direction at positions where they are arranged in a staggered manner together with the plurality of plug signal terminals 10. Thereby, the position of the connector on the receptacle side connected to the plug connector 100 is defined.
[0088] In addition, since the two positioning members 52 are arranged opposite to each other in the two rows of the staggered arrangement arranged in the same number, each of the positioning members 52 is arranged with respect to the approximate center of the upper surface. It is almost symmetrical. Accordingly, the two positioning members 52 can be stably connected to the plug connector 100 and the receptacle-side connector. Note that the plug-side housing 50 may include two or more positioning members.
[0089] The plug connector 100 may be used as a connector 710 (see FIG. 5). In this case, the plug connector 100 is connected to the connector 614 (see FIG. 5). The plug signal terminal 10 is used as a signal terminal 728 (see FIG. 5). The socket 612 (see FIG. 4) may have signal wiring and ground wiring similar to the substrate signal line 202 and the substrate ground line 204.
[0090] FIG. 8 shows an example of a detailed configuration of the plug signal terminal 10. The plug signal terminal 10 includes a plug signal core wire 12, a plug core wire shield 14, an insulating member 17, a plug signal electrode 16, two plug ground electrodes 18, and a circumferential extending portion 19. In this example, the plug signal core wire 12 and the plug core wire shield 14 are used as the core wire 732 and the shield 734 (see FIG. 5). The plug signal core wire 12 and the plug core wire shield 14 may be used as the core wire 744 and the shield 746 (see FIG. 5).
[0091] The plug signal core wire 12 is formed by extending in a linear shape by a conductor such as metal. The plug core wire shield 14 is formed in a cylindrical shape having substantially the same diameter as the inner diameter of the through hole 54 (see FIG. 7). The plug core wire shield 14 is formed longer than the plug signal core wire 12 by a conductor insulated from the plug signal core wire 12 so as to extend in the axial direction of the plug signal core wire 12 and surround the plug signal core wire 12.
[0092] The insulating member 17 is an insulator such as a resin, and is filled in the gap between the plug core wire shield 14 and the plug signal core wire 12. As a result, the plug core wire shield 14 is electrically insulated from the plug signal core wire 12.
[0093] The plug signal electrode 16 is formed by extending from the plug signal core wire 12 substantially parallel to the axial direction of the plug signal core wire 12. The two plug ground electrodes 18 are formed so as to extend from the plug core wire shield 14 in the axial direction and face each other with the plug signal electrode 16 interposed therebetween.
[0094] The circumferentially extending portion 19 extends in a circumferential shape surrounding the signal core wire 12 in the vicinity of one end of the plug signal core wire 12 in a part of the surface of the plug core wire shield 14, and the inner surface surrounding the signal core wire 12 And projecting toward the signal core wire 12.
FIG. 9 shows an example of the detailed configuration of the plug core wire shield 14 and the plug ground electrode 18. FIG. 9A shows the plug core wire shield 14 and the plug ground electrode 18 when viewed from the direction toward the front surface of the plug-side substrate 200 (see FIG. 7). FIG. 9B shows the plug core wire shield 14 and the plug ground electrode 18 when viewed from the A direction. FIG. 9C shows the plug core wire shield 14 and the plug ground electrode 18 when viewed from the B direction. The plug core wire shield 14 includes a protrusion 11 and a stopper 15.
[0096] The protrusion 11 is formed to protrude from the surface of the plug core wire shield 14 toward the outside of the surface. The protrusion 11 locks the plug signal terminal 10 to the plug-side housing 50 on the inner surface of the through hole 54 (see FIG. 7) into which the plug signal terminal 10 (see FIG. 8) is inserted.
[0097] The stopper 15 is formed to extend from the surface of the plug core wire shield 14 toward the inside of the surface, and holds the insulating member 17 (see FIG. 8). Thereby, the insulating member 17 fixes the plug signal core wire 12 (refer FIG. 8). Thus, in this example, the plurality of plug signal terminals 10 can be reliably fixed to the plug-side housing 50 while being insulated from the plug core wire shield 14.
[0098] FIG. 10 illustrates an example of a detailed configuration of the plug-side substrate 200. FIG. 10A shows the front surface of the plug-side substrate 200. FIG. 10B shows the plug-side substrate 200 when viewed from the direction perpendicular to the connector joint surface.
[0099] The plug-side substrate 200 is a substantially rectangular substrate that is substantially parallel to the axial direction of the plug signal terminal 10, for example. The plug-side substrate 200 has a plurality of substrate signal lines 202a and a plurality of substrate ground lines 204a on the front surface, and has a plurality of substrate signal lines 202b and a plurality of substrate ground lines 204b on the back surface. Each substrate signal line 202 is electrically provided independently of each other, and each substrate ground line 204 is grounded.
[0100] The substrate signal lines 202a and the substrate signal lines 202b are arranged in the same arrangement as the staggered arrangement formed by the plurality of plug signal terminals 10. As a result, the plug-side substrate 200 is appropriately connected to the plurality of plug signal terminals 10.
[0101] FIG. 11 is a cross-sectional view of the plug connector 100 taken along the line B-B described with reference to FIG. The plug signal electrode 16a of the plug signal terminal 10 in the first column and the plug signal electrode 16b of the plug signal terminal 10 in the second column are opposed to each other with the plug side substrate 200a interposed therebetween. As a result, the plug signal electrodes 16a of the respective plug signal terminals 10 in the first column come into contact with the respective substrate signal lines 202a (see FIG. 10B) formed on the front surface of the plug-side substrate 200a. The plug signal electrodes 16b of the respective plug signal terminals 10 in the second column are in contact with the respective substrate signal lines 202b (see FIG. 10B) formed on the back surface of the plug side substrate 200a. Similarly, the plug ground electrode 18 (see FIG. 8) in the first row contacts the substrate ground line 204a (see FIG. 10 (b)) formed on the front surface of the substrate, and the ground in the second row. The electrode 18 (see FIG. 8) is in contact with the substrate ground line 204b (see FIG. 10B) formed on the back surface of the substrate.
[0102] As described above, the plurality of plug signal terminals 10 are provided corresponding to the plurality of substrate signal lines 202, respectively. The plug signal electrode 16 electrically connects the plug signal core wire 12 and the substrate signal line 202 corresponding to the plug signal terminal 10, and the plug ground electrode 18 connects the plug core wire shield 14 and the substrate ground wire 204. Are electrically connected to each other. As a result, the signal received by the plug signal core 12 can be transmitted to the plug-side substrate 200.
[0103] FIG. 12 shows a configuration of a receptacle connector 300 which is another example of the connector 702 (see FIG. 5). FIG. 12A shows the receptacle connector 300 when viewed from a direction perpendicular to the connector joining surface. FIG. 12B shows the receptacle connector 300 when viewed from the A direction.
[0104] The receptacle connector 300 is a connector mounted on the receptacle-side substrate 250, and is connected to the plug connector 100 (see FIG. 7) facing the receptacle-side substrate 250 with the receptacle connector 300 interposed therebetween. The receptacle connector 300 includes a receptacle-side housing 60 and a plurality of receptacle signal terminals 20.
[0105] In this example, the plug connector 100 is used as the connector 704 (see FIG. 5). In this case, for example, the plug connector 100 is connected to a plurality of cables 706 (see FIG. 5) instead of the plug-side substrate 200 (see FIG. 7). The receptacle signal terminal 20 is used as the signal terminal 722. The receptacle-side substrate 250 may be a test module 604 (see FIG. 5). About the point other than the above, the plug connector 100 of this example may have the same or similar function as the plug connector 100 described with reference to FIGS. The plug signal core wire 12 (see FIG. 8) and the plug core wire shield 14 (see FIG. 8) may be connected to the transmission line 754 and the shield 756 (see FIG. 5) instead of the plug-side substrate 200.
[0106] The receptacle-side housing 60 is substantially the same as the receptacle signal terminal 20 with a surface substantially the same shape as the upper surfaces of the two plug-side housings 50 (see FIG. 7) arranged in an overlapping manner, approximately perpendicular to the upper surface. It is formed by stretching to the same length. The receptacle-side housing 60 has four positioning holes 62, a plurality of receiving portions 64, four housing through holes 66, and rivets 68.
[0107] The positioning hole 62 penetrates the receptacle-side housing 60 from the upper surface of the receptacle-side housing 60 to the back surface of the upper surface corresponding to the four positioning members 52 (see FIG. 7) provided in the plug connector 100. Formed. Each of the four positioning holes 62 engages with each of the four positioning members 52. Thereby, the positioning member 52 and the positioning hole 62 can correctly define the position of the receptacle-side housing 60 with respect to the plug-side housing 50.
[0108] Each of the plurality of accommodating portions 64 accommodates the receptacle signal terminal 20, respectively. Further, each of the plurality of accommodating portions 64 accommodates a part of each of the plug signal core wire 12 and the plug core wire shield 14. Accordingly, the receptacle-side housing 60 holds the plurality of receptacle signal terminals 20. In this example, each of the plurality of accommodating portions 64 has a plurality of receptacle signal terminals 20 disposed at positions facing the respective plug signal terminals 10 (see FIG. 7) held by the plug-side housing 50. Hold each in a staggered arrangement of rows.
[0109] The four housing through-holes 66 are opposed to each other across the four rows arranged in a staggered manner in the receptacle-side housing 60, and penetrate from the top surface of the receptacle-side housing 60 to the back surface of the surface. , Provided in a substantially cylindrical shape.
[0110] The rivet 68 is formed in a cylindrical shape having substantially the same diameter as the inner diameter of the housing through hole 66, for example, of steel or aluminum. One end of the rivet 68 facing the plug connector 100 is accommodated in the housing through-hole 66 and the other end protrudes from the back surface of the receptacle-side substrate 250 in the direction from the receptacle-side housing 60 toward the receptacle-side substrate 250. The housing through hole 66 and the substrate through hole 252 of the receptacle side substrate 250 are inserted.
[0111] Here, the substrate through-hole 252 is provided in the receptacle-side substrate 250 so as to penetrate from the front surface facing the receptacle-side housing 60 to the back surface corresponding to the housing through-hole 66.
[0112] In the rivet tightening operation of the rivet 68, one end of the rivet 68 facing the plug connector 100 is disposed at a position that does not protrude from the upper surface of the receptacle-side housing 60, and the rivet 68 protruding from the back surface of the receptacle-side substrate 250. The other end is crushed by riveting, for example. As a result, the rivet 68 fixes the receptacle-side housing 60 to the receptacle-side substrate 250 without causing the plug connector 100 and the one end of the rivet 68 to interfere with each other.
[0113] The receptacle connector 300 may be used as the connector 710 (see FIG. 5). In this case, the receptacle signal terminal 20 is used as the signal terminal 728 (see FIG. 5).
[0114] FIG. 13 shows an example of a detailed configuration of the receptacle connector 300. As shown in FIG. FIG. 13A shows a BB cross-sectional view of the receptacle signal terminal 20 in FIG. FIG.13 (b) shows CC sectional drawing of Fig.13 (a). The receptacle signal terminal 20 includes a receptacle signal core wire 22, a receptacle core wire shield 24, a receptacle signal electrode 26, a semicircular portion 23, a receptacle ground electrode 28, and a semicircular extending portion 29. The receptacle signal electrode 26 and the receptacle ground electrode 28 are connected to, for example, a substrate signal line and a substrate ground line on the front surface of the receptacle-side substrate 250 (see FIG. 12B).
[0115] The receptacle signal core wire 22, the receptacle core wire shield 24, and the semicircular extending portion 29 are the same as or similar to the plug signal core wire 12 and the plug core wire shield 14 in the plug signal terminal 10 described with reference to FIG. It may have a similar function.
[0116] The semicircular portion 23 is a shield formed in a semicircular shape in the receptacle core wire shield 24. Moreover, the semicircular extending portion 29 has the same function as the circumferential extending portion 19 except that the circumferential extending portion 19 is formed in a circumferential shape, whereas the semicircular extending portion 19 is formed in a semicircular shape in the semicircular portion 23. Have.
FIG. 14 shows an example of a detailed configuration of the receptacle signal core wire 22 and the receptacle core wire shield 24. FIG. 14 (a) shows the receptacle core wire shield 24 when viewed from a direction substantially perpendicular to the connector joint surface. FIG. 14B shows the receptacle signal core wire 22 when viewed from a direction perpendicular to the CC cross-sectional view of FIG. FIG. 14C shows the receptacle core wire shield 24 when viewed from the same direction.
[0118] In the receptacle core wire shield 24, the half circumference portion 23 is formed in the vicinity of the end portion close to the receptacle ground electrode 28 so as to wrap around the receptacle signal core wire 22 approximately half a circumference.
[0119] The receptacle signal electrode 26 is formed to extend from the receptacle signal core wire 22 in a direction that is substantially perpendicular to the axial direction of the receptacle signal terminal 20 (see FIG. 12) and away from the receptacle core wire shield 24.
[0120] The two receptacle grounding electrodes 28 extend from the receptacle core wire shield 24 in the half-moon direction, which is the direction from the arc of the semicircular portion 23 toward the string, and face each other with the receptacle signal electrode 26 interposed therebetween. Each of the signal electrodes 26 is formed substantially parallel to the extending direction.
[0121] Further, in the accommodating portion 64 (see FIG. 13), the receptacle signal core wire 22 is inserted inside the shield 24 for the receptacle core wire. The receptacle signal core wire 22 and the receptacle core wire shield 24 are electrically insulated by an insulator such as a resin filled inside the receptacle core wire shield 24.
[0122] The receptacle-side housing 60 is formed of, for example, resin. Further, the receptacle core wire shield 24 is formed in a semicircular shape with a part missing. As a result, the insulator inside the receptacle core wire shield 24 and the resin of the receptacle-side housing 60 that surrounds the outside of the receptacle core wire shield 24 are connected at the chipped portion and are integrally formed. Thereby, the receptacle side housing 60 can be manufactured easily and cheaply.
FIG. 15 shows an example of a detailed configuration of the receptacle-side housing 60. FIG. 15A shows the receptacle-side housing 60 when viewed from a direction substantially perpendicular to the front surface of the receptacle-side substrate 250 (see FIG. 12B). FIG. 15B shows the receptacle signal terminal 20 in more detail.
[0124] The plurality of receptacle signal terminals 20 are arranged side by side in the arrangement direction with the direction in which each receptacle signal electrode 26 extends extending in a predetermined arrangement direction. In the present example, each of the plurality of receptacle signal terminals 20 is arranged with the half-moon direction facing the arrangement direction.
[0125] In this case, in each receptacle signal terminal 20, the open space formed in the half-moon direction in the receptacle signal terminal 20 is substantially shielded by the other half-circumferential portion 23 adjacent in the half-moon direction. Thereby, in the receptacle connector 300, the influence of noises, such as crosstalk from the receptacle signal terminal 20 which adjoins, can be reduced, for example.
FIG. 16 shows another example of the configuration of the receptacle connector 300. FIG. 16A shows the receptacle connector 300 from a direction substantially perpendicular to the connector joining surface. FIG. 16B shows the receptacle connector 300 when viewed from the A direction. FIG. 16C shows the receptacle-side housing 60 when viewed from a direction substantially perpendicular to the front surface of the receptacle-side substrate 260. The configuration denoted by the same reference numeral as in FIG. 12 has the same or similar function as the configuration in FIG. 12, and thus the description is omitted except for the points described below.
[0127] The four housing through holes 66 for accommodating the rivets 68 are formed at predetermined positions of the plurality of accommodating portions 64 arranged in a staggered manner. In this example, the four housing through-holes 66 are provided at positions where they can be fitted to the plug connector 100 in a state rotated 180 degrees in the direction toward the connector joint surface.
[0128] The receptacle-side substrate 260 has a substrate through-hole 262 provided at a position corresponding to the housing through-hole 66 in the receptacle-side housing 60 so as to penetrate from the front surface facing the receptacle-side housing 60 to the back surface. Have. In this example, the receptacle-side housing 60 and the receptacle-side substrate 260 are securely fixed by the rivets 68 inserted into the substrate through holes 262.
[0129] FIG. 17 is a cross-sectional view showing a state in which the plug signal terminal 10 and the receptacle signal terminal 20 are fitted. Each of the plug signal terminal 10 and the receptacle signal terminal 20 may have the same or similar function as, for example, one and the other of the signal terminal 722 and the signal terminal 724 (see FIG. 4). The plug signal terminal 10 and the receptacle signal terminal 20 may have the same or similar functions as one and the other of the signal terminal 728 and the signal terminal 726 (see FIG. 4).
[0130] In this example, the plug signal terminal 10 is a male terminal and includes the plug signal core wire 12 and the plug core wire shield 14. The receptacle signal terminal 20 is a female terminal having a shape that fits with a male terminal, and includes a receptacle signal core wire 22 and a receptacle core wire shield 24.
[0131] When the plug signal terminal 10 is inserted into the receptacle signal terminal 20, the receptacle signal core wire 22 presses the outer surface with an elastic force on the inner surface contacting the outer surface of the plug signal core wire 12. The receptacle core wire shield 24 presses the outer surface with an elastic force on the inner surface that contacts the outer surface of the plug core wire shield 14. Thereby, the receptacle signal core wire 22 and the receptacle core wire shield 24 are securely fitted to the plug signal core wire 12 and the plug core wire shield 14.
[0132] Furthermore, in this example, when the plug connector 100 and the receptacle connector 300 are connected, and as a result, the plug signal terminal 10 and the receptacle signal terminal 20 are connected, the plug signal core 12 is connected to the receptacle signal core 22. Prior to this, the plug core wire shield 14 comes into contact with the receptacle core wire shield 24.
[0133] Then, during the period until the tip of the plug core wire shield 14 is inserted into a predetermined position inside the receptacle core wire shield 24, the tip gradually increases as it advances deeper into the receptacle core wire shield 24. Due to the elastic force, the receptacle core wire shield 24 presses the outer surface of the plug core wire shield 14. When the distal end of the plug core wire shield 14 is inserted into a predetermined position, the elastic force with which the receptacle core wire shield 24 presses the outer surface of the plug core wire shield 14 becomes a substantially constant value. After the distal end of the plug core wire shield 14 is inserted into a predetermined position, the plug signal core wire 12 is connected to the receptacle signal core wire 22.
Thereby, the plug signal core wire 12 is inserted into the receptacle signal core wire 22 after the receptacle core wire shield 24 is fully expanded, and, for example, the force for inserting the plug signal terminal 10 into the receptacle signal terminal 20 is reduced. Can do. Further, the plug signal core wire 12 can be prevented from being bent.
[0135] Also, in this example, the shield terminal comes in contact with the signal terminal, so that the static electricity charged in the plug signal terminal 10 is released to the ground terminal to protect the electronic circuit, or the power-on sequence. Can be protected in a DUT in which is predetermined.
[0136] Thus, the receptacle signal core wire 22 and the receptacle core wire shield 24 are fitted into the plug signal core wire 12 and the plug core wire shield 14, respectively. The plug signal terminal 10 is securely and electrically and physically connected to the receptacle signal terminal 20.
[0137] In this example, the receptacle core wire shield 24 is formed such that the distance from the plug core wire shield 14 gradually increases from the AA cross section toward the BB cross section. As a result, the receptacle core wire shield 24 moves with elasticity. In this movable space, a gap that is not filled with an insulator such as resin of the receptacle-side housing 60 is formed between the plug core wire shield 14 and the receptacle core wire shield 24. Similarly, a gap that is not filled with the resin or the like is generated between the plug signal core wire 12 and the receptacle signal core wire 22. For this reason, the impedance value of the mating surface between the plug signal terminal 10 and the receptacle signal terminal 20 from the AA cross section to the BB cross section is compared with the impedance value of the mating surface in other places filled with resin or the like. ,growing.
However, in this example, the groove of the circumferential extension 19 described with reference to FIG. 8 reduces the impedance between the plug signal core wire 12 and the plug core wire shield 14, thereby reducing the impedance of the plug signal terminal 10. Correct in the direction to decrease the value. Similarly, the groove of the semicircular extending portion 29 described with reference to FIG. 13 is a direction in which the impedance value at the receptacle signal terminal 20 is reduced by reducing the distance between the receptacle signal core wire 22 and the receptacle core wire shield 24. To correct. Thereby, in this example, signal degradation caused by impedance mismatching can be reduced.
[0139] In this example, the plug signal terminal 10 is a male terminal and the receptacle signal terminal 20 is a female terminal. However, in other examples, the plug signal core wire 12 and the plug core wire shield 14 One of the receptacle signal core wire 22 and the receptacle core wire shield 24 may be a male terminal, and the other may be a female terminal.
FIG. 18 shows another example of the configuration of the plug signal terminal 30. FIG. 18A shows an example of the configuration of the plug signal terminal 30. FIG. 18B shows an example of the configuration of the plug signal terminal 30 when rotated 90 degrees with respect to the axial direction. In this example, the plug signal terminal 30 is a plug-side connector and is held by a plug-side housing. The plug signal terminal 30 includes a plug signal core wire 32, a first shield 34, a protrusion 36, and a second shield 37.
[0141] In this example, the plug signal terminal 30 is used as, for example, the signal terminal 724 or the signal terminal 726 (see FIG. 4). In this case, for example, the receptacle connector 300 (see FIGS. 12 and 16) may be used as the connector 702 or the connector 710 (see FIG. 4).
[0142] The plug signal core wire 32 is formed, for example, by extending linearly with a conductor such as metal. One end of the plug signal core wire 32 facing the coaxial cable 400 is electrically connected to the central conductor of the coaxial cable 400. In this example, the coaxial cable 400 is used as the cable 706 (see FIG. 5). The central conductor of the coaxial cable 400 may be a transmission line 754 (see FIG. 5).
[0143] The first shield 34 extends from the vicinity of the tip of the plug signal core 32 in the axial direction of the plug signal core 12 and is electrically insulated from the plug signal core 32 so as to surround the plug signal core 32. It is formed by a conductor. The first shield 34 is accommodated in a through-hole or the like provided in the plug-side housing and having substantially the same diameter as the first shield 34.
[0144] The protrusion 36 protrudes in a direction away from the plug signal core wire 32 and extends from the end of the first shield 34. Thus, the plug signal terminal 30 is locked to the surface of the plug-side housing. In this example, the plug-side housing holds a plurality of plug signal terminals 30 in an arrangement corresponding to the plurality of receptacle signal terminals 20 described with reference to FIGS.
[0145] The second shield 37 is formed of a conductor that extends in the axial direction from the tip and surrounds the plug signal core wire 32 and is electrically insulated from the plug signal core wire 32. The tip of the second shield 37 is disposed opposite the first shield 34 and is inserted between the plug signal core wire 32 and the first shield 34 in the vicinity of the protrusion 36. The other end of the second shield 37 is disposed to face the coaxial cable 400, and the outer conductor of the coaxial cable 400 and the second shield 37 are electrically connected by, for example, soldering.
[0146] The plug-side connector configured as described above can appropriately hold the plurality of plug signal terminals 30 by the plug-side housing. Further, the plug-side connector can appropriately relay electrical signals between the receptacle-side connector to be fitted and the coaxial cable 400.
[0147] Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

[0148] As is apparent from the above description, according to the present invention, the device under test can be appropriately tested.

Claims (14)

A device interface apparatus for supplying a test signal for testing a device under test to the device under test and receiving an output signal output from the device under test;
A pin electronics board having a driver for outputting the test signal and a comparator for sampling the output signal;
A board-side connector provided at an end of the pin electronics board, which surrounds a board-side core wire that transmits a transmission signal that is at least one of the test signal and the output signal, and the periphery of the board-side core wire A board-side connector having a board-side shield provided in
A socket for holding the device under test and contacting a terminal of the device under test;
A socket-side connector provided in the socket, the socket-side core wire transmitting the transmission signal to and from the device under test via the socket, and surrounding the socket-side core wire. A socket side connector having a socket side shield,
A cable unit for transmitting the transmission signal between the socket and the pin electronics board;
The cable unit is
A board mating connector to be mated with the board side connector;
A socket mating connector to be mated with the socket side connector;
A transmission cable for transmitting the transmission signal between the board fitting connector and the socket fitting connector;
Each of the transmission cables
A transmission line for transmitting the transmission signal between the board side core wire and the socket side core wire by electrically connecting the board side core wire and the socket side core wire,
A device interface apparatus including a cable shield surrounding the periphery of the transmission line and electrically connected to the board side shield and the socket side shield. The board-side connector has a plurality of board-side core wires, and the board-side shield provided around each of the plurality of board-side core wires,
The socket holds the device under test and contacts each terminal of the device under test;
The socket side connector has a plurality of the socket side core wires, and the socket side shield provided to surround each of the plurality of socket side core wires,
The device interface apparatus according to claim 1, wherein the cable unit includes a plurality of the transmission cables. A connector holding part for holding the socket fitting connector at a predetermined position to be opposed to the socket;
The device interface apparatus according to claim 2, wherein the socket-side connector is fitted to the socket fitting connector at the predetermined position. A motherboard part including the cable unit and the connector holding part;
An attachment / detachment portion having the socket and the socket-side connector, which is mechanically attachable / detachable depending on whether or not the socket-side connector and the socket fitting connector are fitted to the mother board portion. The device interface apparatus according to claim 3, further comprising a detachable unit. 5. The device interface according to claim 4, wherein the detachable portion is formed corresponding to a type of the device under test, and is attached to the motherboard unit when the device under test of the corresponding type is tested. apparatus. A test head having the pin electronics board and the board-side connector;
5. The device interface apparatus according to claim 4, wherein the mother board is mechanically detachable with respect to the test head in accordance with whether or not the board-side connector and the board fitting connector are fitted. The board-side connector has a plurality of board-side shields that are electrically independent from each other in the board-side connector, each surrounding the periphery of each of the plurality of board-side core wires.
The cable shields in each of the plurality of transmission cables are electrically independent from each other between the board fitting connector and the socket fitting connector, and each of the plurality of board side shields is electrically The device interface apparatus according to claim 2 connected. The board mating connector is
A plurality of transmission core wires respectively connected to the transmission lines in each of the plurality of transmission cables;
Surrounding each of the plurality of transmission core wires electrically independently from each other in the board fitting connector, and connecting each of the plurality of cable shields and each of the plurality of board side shields, respectively. The device interface apparatus according to claim 7, further comprising: a plurality of transmission shields. The pin electronics board has a signal wiring for transmitting the transmission signal, and a plurality of grounded grounding wirings,
The substrate-side core wire is formed by linearly extending with a conductor,
The substrate-side shield is formed of a conductor that extends in the axial direction of the substrate-side core wire and surrounds the substrate-side core wire and is electrically insulated from the substrate-side core wire,
The board-side connector is
A signal electrode formed by extending from the substrate side core wire, connecting the substrate side core wire and the signal wiring,
8. The apparatus further comprising: a plurality of ground electrodes extending from the substrate side shield and facing each other across the signal electrode, and connecting the substrate side shield and each of the plurality of ground wirings. The device interface device according to 1. The socket-side connector has a plurality of socket-side shields that are electrically independent from each other in the socket-side connector, surrounding each of the plurality of socket-side core wires, respectively.
The cable shields in each of the plurality of transmission cables are electrically independent from each other between the board fitting connector and the socket fitting connector, and electrically connected to each of the plurality of socket side shields. The device interface apparatus according to claim 2 connected. The socket fitting connector is
A plurality of transmission core wires respectively connected to the transmission lines in each of the plurality of transmission cables;
Surrounding each of the plurality of transmission core wires electrically independently from each other in the socket fitting connector, and each of the plurality of cable shields and each of the plurality of socket side shields, respectively The device interface apparatus according to claim 10, further comprising a plurality of transmission shields to be connected. The socket has a signal wiring for transmitting the transmission signal, and a plurality of grounded grounding wires,
The socket side core wire is formed by linearly extending with a conductor,
The socket-side shield is formed of a conductor that is electrically insulated from the socket-side core wire so as to extend in the axial direction of the socket-side core wire and surround the socket-side core wire.
The socket side connector is
A signal electrode formed by extending from the socket side core wire, connecting the socket side core wire and the signal wiring,
11. The apparatus further comprises a plurality of ground electrodes extending from the socket side shield and facing each other with the signal electrode interposed therebetween, and connecting the socket side shield and each of the plurality of ground wirings. The device interface device according to 1. The board mating connector is
A transmission core connected to the transmission line in the transmission cable;
A transmission shield that surrounds the periphery of the transmission core wire in the socket fitting connector, and connects the cable shield and the board side shield;
The board-side shield contacts the transmission shield before the board-side core wire is connected to the transmission core wire when the board-side connector and the board fitting connector are connected. Device interface equipment. The socket fitting connector is
A transmission core connected to the transmission line in the transmission cable;
A transmission shield that surrounds the periphery of the transmission core wire in the socket fitting connector, and connects the cable shield and the board side shield;
The socket-side shield is in contact with the transmission shield before the board-side core wire is connected to the transmission core wire when the socket-side connector and the socket fitting connector are connected. Device interface equipment.

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