JP5692143B2 - Optical connector module - Google Patents

Description

  The present invention relates to an optical connector module for connecting electronic devices with an optical cable.

  In order to improve the signal transmission speed between electronic devices, it is known to optically connect between electronic devices. For this reason, it is known to wire between electronic devices using an optical connector module that converts an electrical signal into an optical signal, for example, as in Patent Document 1. Such an optical connector module includes an optical cable including a plurality of optical fibers, and a pair of connectors that mutually convert an optical signal and an electronic signal.

Japanese Patent Laid-Open No. 10-32545

By the way, in the connector of the optical connector module as described above, a plurality of light emitting / receiving elements are mounted in a line on the same surface of the same substrate.
In such an optical connector module, if the same connector is attached to both ends of the optical cable as it is, the arrangement order of the channels of the connector at one end and the arrangement order of the channels of the connector at the other end are changed. For example, when one is “transmission 1, transmission 2, reception 1, reception 2”, the other is “transmission 2, transmission 1, reception 2, reception 1”, and channel 1 and channel 2 are reversed.
Therefore, conventionally, two different types of connectors are prepared, and each is attached to one end and the other end of the connector. For this reason, a connector having a different shape has to be created, which is one of the factors that increase the manufacturing cost. In addition, it is necessary to distinguish two types of connectors from each other and attach them to the optical cable, which makes the assembly work complicated.

  Therefore, an object of the present invention is to provide an optical connector module that is easy to assemble and low in manufacturing cost.

The optical connector module of the present invention capable of solving the above problems is
A substrate,
A plurality of light emitting elements and light receiving elements mounted in a first order on the same surface of the substrate;
A plurality of light emitting side metal terminals mounted on the substrate and electrically connected to each of the light emitting elements, and a plurality of light receiving side metal terminals electrically connected to the respective light receiving elements;
A plurality of light-emitting side wirings connecting the light-emitting elements and the light-emitting side metal terminals on a one-to-one basis;
A plurality of light receiving side wirings connecting the light receiving elements and the light receiving side metal terminals on a one-to-one basis, and a pair of connectors,
A plurality of optical fibers that optically connect the light emitting element and the light receiving element between the pair of connectors;
Of the plurality of light emitting side metal terminals and the plurality of light receiving side metal terminals, one is mounted in the first order, and the other is mounted in a second order different from the first order.
The plurality of light emitting side wirings or the plurality of light receiving side wirings connected to the light emitting side metal terminals or the light receiving side metal terminals mounted in the first arrangement order are wired in parallel,
The plurality of light-emitting side wirings or the plurality of light-receiving side wirings connected to the light-emitting side metal terminals or the light-receiving side metal terminals mounted in the second arrangement order are crossed. To do. In this case, it is preferable that the second arrangement order is an arrangement order that is reversed from the first arrangement order.

In the optical connector module of the present invention,
The light emitting side metal terminals may be mounted in the second arrangement order.

In the optical connector module of the present invention,
The connector is
A control circuit for inputting and outputting an electric signal output from the light receiving element and an electric signal input to the light emitting element;
A waveform shaping circuit for shaping a waveform of an electric signal input and output in the control circuit;
The light emitting side wiring and the light receiving side wiring are:
Primary wiring for electrically connecting the control circuit and the waveform shaping circuit;
Secondary wiring connecting the waveform shaping circuit and the light emitting side metal terminal and the light receiving side metal terminal,
The primary wiring may be crossed.

In the optical connector module of the present invention,
The light emitting side metal terminal and the light receiving side metal terminal may be arranged on different surfaces of the substrate.

In the optical connector module of the present invention,
The substrate is a laminated substrate having a plurality of layers,
The light emitting side wiring or the light receiving side wiring may be provided so as to be connected by a through electrode penetrating between layers and straddling different layers.

  According to the optical connector module of the present invention, one of the plurality of light emitting side wirings and the plurality of light receiving side wirings is in the first arrangement order, and the other is in the second arrangement order, and the plurality of light emitting side wirings and the plurality of light receiving side wirings are arranged. Since one of the two is wired in parallel and the other is crossed, the order of the plurality of channels coincides at both ends of the optical connector module, and the same connector can be attached to both ends of the optical fiber. Thereby, an optical connector module can be provided at low cost. Further, since the optical fibers can be connected as they are from one side to the other side without crossing, and a plurality of optical fibers are regularly connected, assembly work is easy.

(A) is a whole perspective view of the optical connector module concerning the embodiment of the present invention, and (B) is a sectional view of an optical cable. It is sectional drawing which shows the inside of a connector. It is a top view of the connector board | substrate accommodated in the connector. (A) shows the signal path | route of the optical connector module which concerns on this embodiment, (B) shows the signal path | route of the optical connector module which concerns on a reference example. (A) is a side view of the connector board | substrate of the optical connector module which concerns on the 1st modification of this invention, (B) is the top view. It is a top view which shows the connector board | substrate of the optical connector module which concerns on the 2nd modification of this invention. FIGS. 7A to 7C are cross-sectional views of the connector substrate shown in FIG.

Hereinafter, an optical connector module according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is an overall perspective view of an optical connector module according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of an optical cable.

  As shown in FIG. 1A, the optical connector module 10 according to the present embodiment includes an optical cable 20 and connectors 30A and 30B attached to one end side and the other end side of the optical cable 20, respectively. The optical connector module 10 can be used for signal (data) transmission. For example, the optical connector module 10 is electrically connected to an electronic device such as a personal computer to which the optical connector module 10 is connected. The optical connector module 10 converts an input / output electric signal into an optical signal and converts the optical signal between one end and the other end. Is to be transmitted. In the following description, the connectors 30 </ b> A and 30 </ b> B are simply referred to as a connector 30 unless the one end side and the other end side are particularly distinguished.

  As shown in FIG. 1 (B), the optical cable 20 has an optical fiber tape core wire 21 in the center as seen in the cross section. The optical fiber tape core wire 21 is formed by bundling a plurality (four in this example) of optical fiber core wires (optical fibers) 22 in parallel on a plane and bundling them in a tape shape with a coating resin. As described above, the plurality of optical fibers accommodated in the optical cable 20 are preferably bundled and integrated in a tape shape so that the arrangement is defined with a predetermined arrangement and pitch. The optical fiber tape core wire 21 is accommodated inside the inner tube 23.

  An intervening layer 24 is provided around the inner tube 23 along with a bundle of tensile strength fibers 241. A metal layer 25 made of a plurality of metal strands is provided on the outer periphery of the intervening layer 24. A jacket 26 made of an insulating resin is provided on the outer periphery of the metal layer 25.

  As shown in FIG. 1A, the connector 30 includes a housing 31 and an electrical input / output unit 32 provided on the distal end side of the housing 31 (on the side opposite to the optical cable 20). The electrical input / output unit 32 is connected to an external device (such as a personal computer) and inputs / outputs electrical signals between the external device and the optical connector module 10. The electric input / output unit 32 is provided so as to protrude from the distal end portion of the housing 31 toward the distal end side.

  FIG. 2 is a cross-sectional view showing the inside of the connector 30. As shown in FIG. 2, the connector 30 includes a connector substrate 33 that is accommodated in the housing 31. The housing 31 has a resin housing 31a having a rectangular cross section on the outside, and a metal housing 31b having a rectangular cross section on the inside of the resin housing 31a. A connector board 33 is accommodated in the internal space S of the metal housing 31b. The connector substrate 33 is attached to the metal housing 31b via a heat dissipation sheet 37.

  FIG. 3 is a plan view of the connector substrate 33. On the mounting surface 33a of the connector substrate 33, a control semiconductor 35, light emitting elements 36a1 and 36a2 that emit optical signals in response to electrical signals, and light receiving elements 36b1 and 36b2 that emit electrical signals in response to optical signals are mounted. ing. The light emitting elements 36a1 and 36a2 and the light receiving elements 36b1 and 36b2 are referred to as light receiving and emitting elements 36 when called without distinction.

  The light emitting / receiving element 36 includes a plurality (here, two) of light emitting elements 36a1 and 36a2 and a plurality (here, two) of light receiving elements 36b1 and 36b2. The light emitting elements 36a1 and 36a2 and the light receiving elements 36b1 and 36b2 are arranged in a line on the connector substrate 33 on the optical cable 20 side of the mounting surface 33a. The two light emitting elements 36a1 and 36a2 are provided on the mounting surface 33a on the upper side in FIG. 3, and the two light receiving elements 36b1 and 36b2 are provided on the mounting surface 33a on the lower side in FIG.

  As the light emitting elements 36a1 and 36a2, for example, a light emitting diode (LED: Light Emitting Diode), a laser diode (LD: Laser Diode), a surface emitting laser (VCSEL: Vertical Cavity Surface Emitting LASER), or the like can be used. As the light receiving elements 36b1 and 36b2, for example, photodiodes (PD: Photo Diode) can be used.

  The control semiconductor 35 includes a control circuit 35a in which a driving IC (Integrated Circuit) for driving the light emitting elements 36a1 and 36a2 and a TIA (Transimpedance Amplifier) for amplifying the output current of the light receiving elements 36b1 and 36b2 are packaged, and a waveform shaper. And a CDR (Clock Data Recovery) device 35b.

  The electrical input / output unit 32 is provided on the side opposite to the side to which the optical cable 20 of the connector 30 is connected. The electric input / output unit 32 has a plurality of metal terminals 61, 62, 63, 64. These metal terminals 61 to 64 are soldered to the distal end side of the connector substrate 33. Of the plurality of metal terminals 61, 62, 63, 64, the light emitting side metal terminals 61, 62 are electrically connected to the light emitting elements 36a1, 36a2, and the light receiving side metal terminals 63, 64 are electrically connected to the light receiving elements 36b1, 36b2. It is connected to the.

  On the mounting surface 33 a of the connector substrate 33, a wiring 50 that electrically connects the light emitting / receiving element 36 and the electric input / output unit 32 is formed. More specifically, as the wiring 50, a primary wiring 50a that connects the control circuit 35a and the CDR device 35b and a secondary wiring 50b that connects the CDR device 35b and the metal terminal 32a are formed.

  As shown in FIGS. 2 and 3, the light emitting / receiving element 36 is optically connected to the optical fiber core wire 22 via the lens array component 41. The lens array component 41 is disposed on the mounting surface 33a of the connector substrate 33 so as to cover the light emitting / receiving element 36 and the control circuit 35a. As described above, since the plurality of light emitting / receiving elements 36 are formed on the same mounting surface 33 a of the single connector substrate 33, the plurality of light receiving / emitting elements 36 can be obtained simply by mounting the single lens array component 41. And a plurality of optical fiber core wires 22 can be optically coupled together.

  The lens array component 41 is a member made of a transparent resin. As shown in FIG. 2, the lens array component 41 includes a plurality of fiber side lens portions 41 a facing the end face of the optical fiber core wire 22 exposed from the fiber support portion 42 and a plurality of light receiving and emitting elements 36. It has the element side lens part 41b, and the reflective surface 41c which optically connects the fiber side lens part 41a and the element side lens part 41b. The plurality of fiber side lens portions 41 a and element side lens portions 41 b are arranged in an array along the width direction of the lens array component 41. The reflection surface 41 c is also formed on the upper surface of the lens array component 41 along the width direction.

  The light emitted from the light emitting elements 36a1 and 36a2 enters the element side lens unit 41b, is reflected by the reflecting surface 41c, and is optically coupled to the optical fiber core wire 22 by the fiber side lens unit 41a. The light emitted from the end face of the optical fiber core 22 enters the lens array component 41 from the corresponding fiber side lens portion 41a, is reflected by the reflection surface 41c, and is reflected by the element side lens portion 41b to the light receiving elements 36b1 and 36b2. Photocoupled. In this way, the plurality of optical fiber core wires 22 and the light emitting / receiving elements 36 are optically connected via the lens array component 41.

  The fiber support portion 42 supports the optical fiber core wire 22 exposed from the end portion of the optical cable 20. In the fiber support portion 42, the optical fiber core wire 22 is separated from the optical fiber tape core wire 21 into a single core and supported in a state of being aligned in a row. By attaching the fiber support portion 42 to the connector substrate 33, the optical fiber core wires 22 are attached to the connector substrate 33 in a state of being aligned in a line.

  The fiber support portion 42 is provided with a through hole having a diameter that is the same as or slightly larger than that of the optical fiber core wire 22, and the optical fiber core wire 22 is inserted into the through hole and fixed. The fiber support portion 42 is positioned with respect to the lens array component 41 so that the end surface of the optical fiber core wire 22 faces the fiber side lens portion 41a.

  Further, at both ends of the optical cable 20, the outer sheath 25 is removed and the optical fiber tape core wire 21 is exposed. Further, the braid 24 peeled off so that the optical fiber tape core wire 21 is exposed is fixed to a fixing portion 34 provided in the connector 30, whereby the optical cable 20 is fixed to the connector 30.

  Thus, for example, when an electrical signal is input from the electrical input / output unit 32, the electrical signal is input from the light emitting side metal terminals 61 and 62 to the light emitting elements 36a1 and 36a2 via the CDR device 35b and the control circuit 35a. 36 transmits an optical signal to the optical fiber core wire 22 in accordance with the electrical signal. On the contrary, when an optical signal is input from the optical fiber core wire 22, the light receiving elements 36b1 and 36b2 emit an electric signal corresponding to the optical signal, and the electric signal is received through the control circuit 35a and the CDR device 35b. An electric signal is output from the electric input / output unit 32 by being input to the terminals 63 and 64.

FIG. 4 is an explanatory diagram schematically showing a signal path of the optical connector module, FIG. 4A shows a signal path of the optical connector module 10 according to the present embodiment, and FIG. 4B is a reference example. The signal path | route of the optical connector module which concerns is shown.
In the following, as shown in FIG. 4, the terminals of the external device to which the optical connector module 10 is connected are the first input terminal In1, the second input terminal In2, the first input terminal from the right side when viewed from the optical connector module 10. A case where the output terminal Out1 and the second output terminal Out2 are arranged will be described.

  First, connectors of external devices connected to one and the other end of the optical connector module 10 are designed under the same standard, and the respective connectors have the same shape. Therefore, the terminal arrangement of the connector of the external device is reversed at both ends of the optical connector module 10. That is, in the illustrated example, the first input terminal In1, the second input terminal In2, the first output terminal Out1, and the second output terminal Out2 are arranged in this order from the top on one end side, and the top on the other end side. To second output terminal Out2, first output terminal Out1, second input terminal In2, and first input terminal In1. The signal from the first input terminal In1 is transmitted to the first output terminal Out1, and the signal from the second input terminal In2 is transmitted to the second output terminal Out2.

Further, since the connector 30 of the optical connector module 10 uses the same connector at both ends, in the illustrated example, in the connector 30A on one end side, the light emitting elements 36a1, 36a1 are formed in the upper region on the mounting surface 33a of the connector substrate 33. Light receiving elements 36b1 and 36b2 (first arrangement order) are formed in the lower region 36a2 (first arrangement order). Further, in the connector 30B on the other end side, light emitting elements 36a1 and 36a2 (first arrangement order) are formed in the lower area on the mounting surface 33a, and light receiving elements 36b1 and 36b2 (first arrangement order) are formed in the upper area. ing.
Further, on the same surface of the connector substrate 33 of the connector 30, the light emitting side input terminals 61 and 62, the first output terminal Out1, and the second output terminal Out2 connected to the first input terminal In1 and the second input terminal In2, respectively. The light receiving side metal terminals 63 and 64 connected to are formed.

  The optical cable 20 used in the optical connector module 10 has a plurality of optical fiber core wires 22 arranged in parallel with each other. For this reason, if the light emitting / receiving element 36 and the metal terminals 61 to 64 are all connected in parallel by wiring provided on the connector substrate 33, as shown in FIG. The signal of the terminal In1 is output to the second output terminal Out2 on the other end side, and the signal of the second input terminal In2 on one end side is output to the first output terminal Out1 on the other end side. That is, the signal from the first input terminal In1 is not transmitted to the first output terminal Out1.

  Therefore, in this embodiment, as shown in FIG. 4A, the two light receiving side wirings 51a and 51b for connecting the output terminals Out1 and Out2 and the light receiving elements 36b1 and 36b2 are connected to each other on the connector boards 33 at both ends. Crossed. More specifically, the light receiving side metal terminal 63 connected to the first output terminal Out1 and the light receiving side wiring 51a connecting the light receiving element 36b2, and the light receiving side metal terminal 64 connected to the second output terminal Out2 and the light receiving element. The light receiving side wiring 51b connecting 36b2 is inverted 180 degrees and crossed when viewed from the connection direction. That is, the plurality of light receiving elements 36b1 and 36b2 mounted in the first arrangement order on the same surface of the substrate are arranged in the first arrangement order via the plurality of light receiving side wirings 51a and 51b wired in an intersecting manner. The light receiving side metal terminals 63 and 64 mounted in the inverted second arrangement order are electrically connected.

  On the other hand, in the connector boards 33 at both ends, the two light emitting side wirings 52a and 52b that connect the input terminals In1 and In2 and the light emitting elements 36a1 and 36a2 are directly connected in parallel without crossing each other. More specifically, the metal terminal 61 connected to the first input terminal In1 and the light emitting side wiring 52a connecting the light emitting element 36a1, and the metal terminal 62 connected to the second input terminal In2 and the light emitting element 36a2 are connected. The light emitting side wiring 52b extends in parallel and does not intersect. That is, the plurality of light emitting elements 36a1 and 36a2 mounted in the first arrangement order on the same surface of the substrate are mounted in the first arrangement order via the plurality of light emitting side wirings 52a and 52b wired in parallel. The light emitting side metal terminals 61 and 62 are electrically connected.

Here, the first arrangement order refers to a case where the channels 1 and 2 are arranged in this order from left to right when the optical cable 20 is viewed from the connector board 33. The second arrangement order refers to a case where the channels 1 and 2 are arranged in this order from right to left when the optical cable 20 is viewed from the connector board 33.
That is, in FIG. 4, the light emitting side metal terminal 61 for inputting the channel 1 signal and the light emitting side metal terminal 62 for inputting the channel 2 signal are viewed from the left to the right when the optical cable 20 is viewed from the connector board 33. The metal terminals 61 and the light emitting side metal terminals 62 are arranged in this order.
In FIG. 4, the light receiving side metal terminal 63 from which the channel 1 signal is output and the light emitting side metal terminal 64 from which the channel 2 signal is output are from left to right when the optical cable 20 is viewed from the connector substrate 33. The light receiving side metal terminals 64 and the light receiving side metal terminals 63 are arranged in this order.

  As described above, in the optical connector module 10 according to the present embodiment, the light emitting side wirings 52a and 52b are connected in parallel as they are on the connector substrate 33, and the light receiving side wirings 51a and 51b are 180 degrees when viewed from the connection direction. Inverted and crossed to connect. Thereby, even when the same connector 30 is used at both ends, the external devices can be correctly connected. Thereby, since it is not necessary to employ | adopt a different connector at both ends, the optical connector module 10 can be provided at low cost.

  Further, since the plurality of optical fiber core wires 22 are taped, they are arranged between the connectors 30 without changing the parallel order. For this reason, when producing the optical connector module 10, the optical cable 20 can be connected between the connectors 30 at both ends in the arrangement order of the optical fiber tape core wires 21 without considering the arrangement order of the optical fiber core wires 22. . Therefore, the optical connector module 10 can be easily produced and the yield can be improved.

  In the present embodiment, the light receiving side metal terminals 63 and 64 are mounted in the second arrangement order reversed from the first arrangement order with respect to the light receiving elements 36b1 and 36b2 mounted in the first arrangement order. The side wirings 51a and 51b are crossed and wired. By crossing the light receiving side wirings 51a and 51b through which a relatively small current flows with respect to the light emitting side wirings 52a and 52b, mutual crosstalk generated between the light receiving side wirings 51a and 51b can be reduced.

  In the above-described embodiment, the case where the light receiving side wirings 51a and 51b are crossed without crossing the light emitting side wirings 52a and 52b has been described as an example, but the light receiving side wirings 51a and 51b are not crossed. The light emission side wirings 52a and 52b may be crossed. In the above-described embodiment, the primary wiring 50a that connects the control circuit 35a and the CDR device 35b and the secondary wiring 50b that connects the CDR device 35b and the metal terminal 32a are formed so as to cross each other. May be.

  For example, contrary to the above-described embodiment, in the present embodiment, the second light emitting side metal terminals 61 and 62 are reversed from the first arrangement order with respect to the light emitting elements 36a1 and 36a2 mounted in the first arrangement order. The light emitting side wirings 52a and 52b may be crossed and wired. By crossing the light emitting side wirings 52a and 52b through which a relatively large current flows with respect to the light receiving side wirings 51a and 51b, the strength against the signal of noise generated by crossing the wirings can be reduced. The ratio is improved. In this case, the light receiving side metal terminals 63 and 64 are also mounted in the first arrangement order with respect to the light receiving elements 36b1 and 36b2 mounted in the first arrangement order, and the light receiving side wirings 51a and 51b are wired in parallel.

  Moreover, although the above-mentioned embodiment gave and demonstrated the example which provided the metal terminals 61-64 on the same surface of the connector board | substrate 33 using the single layer connector board | substrate 33, this invention is limited to this example. Absent.

FIG. 5A is a side view of the connector board 33A of the optical connector module 10A according to the first modification of the present invention. FIG. 5B is a top view of the connector board 33A shown in FIG.
As shown in FIGS. 5A and 5B, the optical connector module 10A has light emitting side metal terminals 61 and 62 formed on the front side of a single connector substrate 33A, and light receiving side metal terminals 63 and 64 formed on the back side. Has been.

  In the optical connector module 10A according to this modification, the light receiving side metal terminal 63 connected to the first output terminal Out1 of the external device on one side, the light receiving side metal terminal 64 connected to the second output terminal Out2, and the CDR device. In the secondary wiring 50b connecting to 35b, the through electrodes 50c and 50d are used to cross each other.

  Specifically, the through electrode 50 c in the secondary wiring 50 b connected to the light receiving side metal terminal 63 is formed closer to the CDR device 35 b than the through electrode 50 d in the secondary wiring 50 b connected to the light receiving side metal terminal 64. Has been. The position of the secondary wiring 50b connected to the light receiving side metal terminal 63 is changed on the back surface of the connector board 33A, and the position of the secondary wiring 50b connected to the light receiving side metal terminal 64 is changed on the surface of the connector board 33A. Has been. As a result, the positions of the front and back surfaces of the connector board 33A are interchanged.

  Further, by forming the metal terminals 61 to 64 on the front surface side and the back surface side of the connector substrate 33A as described above, the distance between the secondary wirings 50b extending from the metal terminals 61 to 64 can be set large. . Thereby, the crosstalk between the secondary wirings 50b can be reduced.

  FIG. 6 is a plan view showing a connector board 33B of an optical connector module according to a second modification of the present invention. FIGS. 7A to 7C are cross-sectional views of the connector board 33B shown in FIG.

  In the second modified example, as shown in FIGS. 6 and 7A to 7C, the electrical signal input to the first input terminal In1 of the external device is the light-emitting side metal terminal 61, two The light is input to the light emitting element 36a1 through the secondary wiring 53b, the CDR device 35b, the primary wiring 53a, and the control circuit 35a. The electrical signal input to the second input terminal In2 is input to the light emitting element 36a2 via the light emitting side metal terminal 62, the secondary wiring 54b, the CDR device 35b, the primary wiring 54a, and the control circuit 35a.

Furthermore, an electrical signal from the light receiving element 36b1 is input to the first output terminal Out1 of the external device via the control circuit 35a, the primary wiring 55a, the CDR device 35b, the secondary wiring 55b, and the light receiving side metal terminal 63. Similarly, an electrical signal from the light receiving element 36b2 is input to the second output terminal Out2 of the external device via the control circuit 35a, the primary wiring 56a, the CDR device 35b, the secondary wiring 56b, and the light receiving side metal terminal 64. .
Note that two wires are formed between the metal terminals 61 to 64 and the CDR device 35b in order to transmit a differential signal. The light emitting / receiving elements 36a1, 36a2, 36b1, 36b2 and the control circuit 35a are connected by a bonding wire 57.

  In this modification, the connector substrate 33B is configured by a three-layer laminated substrate. Light emitting side metal terminals 61 and 62 are formed on the surface of the connector substrate 33B, and light receiving side metal terminals 63 and 64 are formed on the back surface of the connector substrate 33B.

  FIG. 7A is a cross-sectional view of the connector substrate 33B showing the primary wiring 53a and the secondary wiring 53b. As shown in FIGS. 6 and 7A, the primary wiring 53a and the secondary wiring 53b connected to the first input terminal In1 are formed on the surface 33a of the connector substrate 33B. Similarly, the primary wiring 54a and the secondary wiring 54b connected to the second input terminal In2 are formed on the surface 33a of the connector substrate 33B. The primary wirings 53a and 54a are not crossed, and the secondary wirings 53b and 54b are not crossed.

  FIG. 7B is a cross-sectional view of the connector board 33B showing the primary wiring 55a and the secondary wiring 55b. As shown in FIGS. 6 and 7B, the primary wiring 55a connected to the first output terminal Out1 is formed in a layer below the surface 33a via the through electrode 55c. The secondary wiring 55b connected to the first output terminal Out1 is formed on the back surface 33b of the connector substrate 33B, and is connected to the CDR device 35b by the through electrode 55d. Thereby, the secondary wiring 55b is connected to the light receiving side metal terminal 63 provided on the back surface 33b.

  FIG. 7C is a cross-sectional view of the connector board 33B showing the primary wiring 56a and the secondary wiring 56b. As shown in FIGS. 6 and 7C, the primary wiring 56a connected to the second output terminal Out2 is formed on the surface 33a of the connector substrate 33B. Further, the secondary wiring 56b connected to the second output terminal Out2 is formed on the back surface 33b of the connector substrate 33B, and is connected to the CDR device 35b via the through electrode 56c. Thereby, the secondary wiring 56b is connected to the light receiving side metal terminal 64 provided on the back surface 33b.

  Thus, in this modification, the primary wirings 55a and 56a are provided so as to straddle different layers of the connector substrate 33B, and the primary wirings 55a and 56a intersect so that their positions are reversed. Thus, by providing wiring so as to straddle different layers, intersecting wiring patterns can be easily formed.

  In the present modification, the primary wirings 55a and 56a intersect each other, so that electrical components and optical components are integrated, and the optical fiber 22 on which the electronic components and optical components are integrated and mounted on the connector substrate 33. Can effectively utilize the space on the side where the is mounted. For example, when the lens array component 41 is disposed so as to cover the control circuit 35a and the light emitting / receiving elements 36a1, 36a2, 36b1, and 36b2, as shown in FIG. It is necessary to ensure. In this case, the primary wirings 55a and 56a must be relatively longer than the secondary wirings 55b and 56b. In this case, it is not necessary to increase the total length of the connector board 33 in order to cross the secondary wirings 55b and 56b by crossing in the region where the primary wirings 55a and 56a are formed. For this reason, the connector board | substrate 33 can be reduced in size.

  In the present modification, the primary wirings 55a and 56a to which signals from the light receiving elements 36b1 and 36b2 before being input to the CDR device 35b are transmitted intersect. Since the signals from the light receiving elements 36b1 and 36b2 before being input to the CDR device 35b are weak, they are easily affected by mutual crosstalk. Therefore, as in the present modification, the primary wirings 55a and 56a are formed in different layers and crossed, whereby the primary wirings 55a and 56a can be separated, and crosstalk can be reduced.

  The current output from the light receiving elements 36b1 and 36b2 is weaker than the current input to the light emitting elements 36a1 and 36a2. In the present embodiment, the secondary wirings 55a and 56a on the light receiving side through which weak output currents from the light receiving elements 36b1 and 36b2 flow are provided with the layers separated. For this reason, the crosstalk between the secondary wirings 55a and 56a can be further reduced.

10: optical connector module, 20: optical cable, 21: optical fiber tape core wire, 22: optical fiber core wire (optical fiber), 30: connector, 32: electrical input / output unit, 33: connector substrate (substrate), 36: receiving Light emitting element, 41: lens array component, 61-64: metal electrode

Claims (6)

A substrate,
A plurality of light emitting elements and light receiving elements mounted in a first order on the same surface of the substrate;
A plurality of light emitting side metal terminals mounted on the substrate and electrically connected to each of the light emitting elements, and a plurality of light receiving side metal terminals electrically connected to the respective light receiving elements;
A plurality of light-emitting side wirings connecting the light-emitting elements and the light-emitting side metal terminals on a one-to-one basis;
A pair of connectors having a plurality of light-receiving side wiring for connecting the light receiving element and the light receiving-side metal terminals one to one,
A plurality of optical fibers that optically connect the light emitting element and the light receiving element between the pair of connectors;
Of the plurality of light emitting side metal terminals and the plurality of light receiving side metal terminals, one is mounted in the first order, and the other is mounted in a second order different from the first order.
A plurality of light emitting side wirings connected to the light emitting side metal terminals mounted in the first arrangement order or a plurality of light receiving sides connected to the light receiving side metal terminals mounted in the first arrangement order The wiring is wired in parallel,
A plurality of light emitting side wirings connected to the light emitting side metal terminals mounted in the second arrangement order or a plurality of light receiving sides connected to the light receiving side metal terminals mounted in the second arrangement order wiring is wired so as to intersect,
In one of the connectors, the plurality of light emitting side wirings are wired in parallel and the plurality of light receiving side wirings are crossed, and in the other connector, the plurality of light emitting side wirings are crossed and wired. The optical connector module is characterized in that the light receiving side wirings are wired in parallel .   The optical connector module according to claim 1, wherein the second arrangement order is an arrangement order that is reversed from the first arrangement order.   The optical connector module according to claim 1, wherein the light emitting side metal terminals are mounted in the second arrangement order. The connector is
A control circuit for inputting and outputting an electric signal output from the light receiving element and an electric signal input to the light emitting element;
A waveform shaping circuit for shaping a waveform of an electric signal input and output in the control circuit;
The light emitting side wiring and the light receiving side wiring are:
Primary wiring for electrically connecting the control circuit and the waveform shaping circuit;
Secondary wiring connecting the waveform shaping circuit and the light emitting side metal terminal and the light receiving side metal terminal,
The optical connector module according to any one of claims 1 to 3, wherein the primary wiring intersects.   5. The optical connector module according to claim 1, wherein the light emitting side metal terminal and the light receiving side metal terminal are arranged on different surfaces of the substrate. 6. The substrate is a laminated substrate having a plurality of layers,
The said light emission side wiring or the said light reception side wiring is provided by the penetration electrode which penetrates between layers, and is provided so that a mutually different layer may be straddled. Optical connector module.

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