JP2002169037A - Optical wiring part and electric substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical wiring part in which the size of a substrate to be wired is reduced, moreover an optical connector is easily inserted into a mounted part, and further which is arranged in a position where it is not brought into contact with the mounted part. SOLUTION: In the optical wiring part in which one or a plurality of optical coated fibers 3a, 3b and 3c are arranged on a two-dimensional plane and are fixed to sheets 1a, 1b and 1c, the sheets are arranged in the peripheral edge part encircling the central parts 5a, 5b and 5c of the two-dimensional plane including the center of gravity, are formed into a shape which includes at least one right angle bending and stretches over two sides of more, are provided with at least one of branched parts 2a, 2b and 2c which are branched and projected toward the central part, and are provided with a terminal connection part for the optical coated fiber at the tip ends of the branched parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical wiring component in which a plurality of optical fibers are arranged and fixed on a two-dimensional plane.

[0002]

2. Description of the Related Art An optical / electric composite component such as an optical transmitting module, an optical receiving module, an optical variable resistor, etc., on a substrate, or
Electrical components such as control ICs and power supply elements are mounted, and these components are connected on an electrical board or between those components and components mounted on another electrical board by optical fiber cores. May be. The connection of electric signals between electric components mounted on the same electric board is usually performed through an electric wiring circuit incorporated in the electric board.
Since it is difficult to connect an optical signal between the electric composite components together with the electric wiring circuit in the electric board, it is generally difficult to form an optical wiring circuit. I do.

[0003] A connector insertion port for connecting an optical / electrical composite component or an electrical component mounted on the above-mentioned electrical board to an optical wiring or an electrical wiring is usually located on the peripheral edge of the electrical board and parallel to the board surface. Direction or upward. When an optical / electrical composite component is to be connected with an optical fiber core, which is an optical wiring component, an optical connector is usually attached to both ends of the optical fiber core and the input / output optical / electrical composite component is connected to the output side. The optical / electrical composite parts are connected and connected one to one. At that time, the optical fiber core must have an extra length to insert the optical connector.Therefore, increase the space between the mounted components and place the optical fiber core in the space, or use the component mounted on the board. The optical fiber core is disposed in the space using the upper space (a gap between the electric boards when a plurality of electric boards are stacked) or by any method.

FIG. 4 is a plan view showing an example of such a substrate and optical wiring, wherein 22 is an optical fiber core, 23 is an optical connector, 24 is an optical wiring part, 25, 26, 27, and 28.
Denotes a mounting component, and 29 denotes a substrate. This optical wiring component 24
The optical connector 23 has optical connectors 23 attached to both ends of an optical fiber core 22, and connects and connects the mounting components 25 and 26 or the mounting components 27 and 28 one-to-one. Note that the optical fiber core 22 has an extra length for inserting the optical connector 23 into the connector insertion port of each mounted component.

FIG. 5 is a view showing an example of a substrate using an optical wiring component in which an optical fiber core is fixed to a plastic film and an optical wiring. FIG. 5 (A) is a plan view and FIG. 5 (B).
Is a sectional view in the X direction. 5, 21 'is a plastic film, 22' is an optical fiber core, 23 'is an optical connector, 24' is an optical wiring component, 25 ', 26', 2
7 'and 28' are mounted components and 29 'is a substrate. In this case, an optical wiring component 24 ′ has an optical fiber core 22 ′ fixed to a plastic film 21 ′ having a wiring pattern shape with an adhesive or the like, and optical connectors 23 ′ are attached to both ends of the optical fiber core 22 ′. It is something. FIG. 5B
As shown in FIG. 7, the plastic film 21 'and the optical fiber core 22' are provided with flexibility, and the optical connector 23 'is inserted into the connector insertion holes of the mounting parts 25', 27 ', etc. by bending. Secure extra length.

In the case of FIG. 4 and FIG.
Light / light-to-electricity conversion function fixed on 9 ′
Mounting parts 25, 26, 27, 28, 2 such as electric composite parts
The electrical connection between 5 ', 26', 27 ', and 28' is made by an electric wiring circuit (not shown) provided in the substrate as necessary. The optical system is connected to the substrate 29,
Optical wiring component 2 arranged substantially in parallel with the substrate on 29 '
4, 24 '.

[0007]

Unlike electrical wiring, in which a wiring route is determined in consideration of conduction and the shortest distance, in the case of optical wiring, an extra connection length, a connection direction, and a permissible bending radius of an optical fiber are considered. There must be. That is, FIGS.
As shown in (1), it is necessary to set the position of the optical / electric composite component or electric component and the direction of the connector insertion port in consideration of the size and length of the optical wiring component arranged in the space between the mounted components in advance. There is. Also, an optical connector 23 of an optical wiring component,
In coupling the component 23 'to the mounted component, the optical connector 2 is mounted from the inside of each mounted component (a side far from the peripheral edge of the substrate).
3 needs to be inserted by hand, and a work space and extra length of wiring for that are required. From these, it is necessary to determine the size of the board in consideration of the arrangement of optical wiring components,
This makes it difficult to reduce the size of the substrate and to freely design the layout and orientation of the optical / electrical composite component or electrical component.

It is also conceivable to dispose the optical wiring component in a space above the mounted component so that the optical connector insertion port of the mounted component mounted on the substrate faces upward. In this case, since there is not much space required for disposing the optical wiring components between the mounted components, it is possible to reduce the size of the substrate.However, since wiring space is required on the substrate, a plurality of substrates are required. In the case of stacking, the stacking height is high. Also, since many mounted components generate heat from electrical components, the heat may damage the optical fiber core wires in the optical wiring components that have come into contact with the mounted components, or the mounted components may be covered by the optical wiring components. There is a problem that the optical wiring component hinders heat radiation from the electrical component, which adversely affects the characteristics and life of the electrical component.

According to the present invention, the size of the substrate can be reduced, and the work of inserting the optical connector can be easily performed. It is intended to provide an optical wiring component capable of performing the following.

[0010]

An optical wiring component according to the present invention comprises:
In an optical wiring component in which one or a plurality of optical fiber cores are arranged on a two-dimensional plane and fixed to a sheet, the sheet is arranged at a peripheral portion surrounding a central part of the two-dimensional plane including the center of gravity. And at least one branch that includes at least one right-angled bend and extends over two or more sides, and has at least one branch that branches and protrudes toward the center. It has a terminal connection part of a cord.

If this optical wiring component is used, the main part surrounding the central portion of the optical wiring component can be arranged along the periphery of the substrate, and the components mounted on the substrate can be collected at the central portion and mounted efficiently. . In addition, since the main part of the optical wiring component can be arranged in the dead space at the periphery of the board where mounting of the mounting component is difficult due to the manufacturing of the board, the mounting area and the wiring area do not congest. The size of the substrate can be reduced. In addition, since the insertion of the optical connector into the mounted component can be performed from a direction close to the periphery of the substrate, the work of inserting the optical connector is also facilitated. Furthermore, since the optical wiring component and the mounted component do not overlap, heat generated by the mounted component may damage the optical fiber core of the optical wiring component,
Conversely, the heating element is not covered by the optical wiring component and the heat radiation from the heating element is not hindered.

[0012]

1 (A), 1 (B) and 1 (C) are plan views showing an embodiment of an optical wiring component according to the present invention, wherein 1a, 1b, 1b 'and 1c are sheets and 2a, respectively. , 2b,
2c, 2d are branch parts, 3a, 3b, 3c are optical fiber cores, 4a, 4b, 4c are optical connectors, 5a, 5b, 5c
Is a central portion, and 6a, 6b, and 6c are optical wiring components.

The sheet 1a shown in FIG.
a that is arranged over four sides of the peripheral portion so as to surround the central portion 5a and protrudes toward the central portion 5a side.
It has two branches 2a. Further, the sheet 1b shown in FIG. 1 (B) has a shape arranged over four sides of the peripheral portion so as to surround the central portion 5b.
It has four branches 2b protruding toward the side. However, since there is no optical fiber core in the portion 1b 'indicated by a broken line on one side of the sheet 1b, the portion 1b' may be omitted and the central portion 5b may communicate with the external region. FIG. 1 (C)
The sheet 1c shown in FIG. 1 has a shape arranged over four sides of a peripheral portion so as to surround the central portion 5c, and has two branch portions 2c protruding toward the central portion 5c. In addition, three branches 2d projecting outward are provided as necessary.

Although the sheets 1a, 1b, and 1c are each arranged over three or more sides of the peripheral portion so as to surround the central portion, the sheet of the optical wiring component according to the present invention has two sheets. Central portions 5a, 5b including the center of gravity of the dimensional plane,
5c is disposed on the peripheral edge portion surrounding 5c and includes at least one right-angled bend and extends over two or more sides, and has at least one branch portion branched and projected toward the central portion. Is fine.

The optical fiber cores 3a, 3b, 3c
Are arranged in a desired pattern along each of the sheets 1a, 1b, and 1c, and are adhered and fixed to the sheets, and the optical wiring components 6a,
6b and 6c. Also, the optical fiber cores 3a, 3b,
The terminals 3c are arranged so as to be located at the branch portions 2a, 2b, 2c and 2d of the sheet. In addition, at least the branch 2
It is preferable that a, 2b, 2c, and 2d have flexibility. This makes it possible to bend or bend the branch, so that the optical connector can be easily inserted.

Optical connectors 4a, 4b, and 4c are attached to the terminals of the optical fiber cores 3a, 3b, and 3c as necessary. If the branch has flexibility, even if the position of the optical connector is at the tip of the branch protruding toward the center, the optical connector is bent by 180 degrees after the optical connector is attached. Is turned outward, the end face of the optical connector can be easily polished by the polishing apparatus.

The optical fibers 3a, 3b and 3c may be single-core or multi-core with a plurality of cores arranged in parallel to form a tape. Further, a part may be a single-core optical fiber core and the other may be a multi-core optical fiber core. Also, the optical connectors 4a, 4b, and 4c may be single-core optical connectors or multi-core optical connectors according to the number of optical fiber cores led from one branch. Further, the shape or number of optical connectors can be changed depending on the end of each optical fiber core. In addition, it is preferable to realize an optical wiring having three or more connection terminals as well as connecting (connecting one-to-one) the two opposing optical connectors.

FIGS. 2A and 2B are cross-sectional views each showing an example of a part of an optical wiring component in which an optical fiber is bonded and fixed to a sheet. '
Is a sheet, 9, 9 'is an adhesive, 10 is a resin coating, 11,
11 'is an optical wiring component. The optical wiring component 11 shown in FIG. 2 (A) has an optical fiber core 7 arranged in a desired pattern on a layer of an adhesive 9 provided on one sheet 8 and bonded and fixed thereto. And reinforced. When the optical fiber 7 is firmly adhered and fixed to the sheet 8 with the adhesive 9, the layer of the resin coating 10 is not necessarily required. Also, the optical wiring component 11 'shown in FIG.
Are two sheets 8, 8 'provided with a layer of adhesive 9, 9'
Thus, the optical fiber core wires 7 arranged in a desired pattern on a two-dimensional plane are sandwiched and fixed by bonding.
As the sheets 8 and 8 ', a plastic film made of a polyimide resin or the like which is flexible and has good heat resistance can be used, but other materials such as polypropylene and polyester may be used. Easy materials are acceptable. In addition, the adhesive may be any material that matches well with the coating material of the optical fiber core, and generally, an adhesive made of silicone resin, acrylic resin, urethane resin, or the like can be used.

FIGS. 3A and 3B are perspective views showing examples of connecting components mounted on a substrate using the above-described optical wiring component of the present invention.
a and 12b are substrates, 13 is an optical wiring component, 13a and 13b
Is a branch, 13c is an optical connector, 14, 14 ', 15, 1
5 'is a mounting component. In addition, the illustration of the optical fiber core wire included in the optical wiring component 13 is omitted.

In the example shown in FIG. 3A, mounting components 14 and 15 such as an optical / electric composite component are located near the center of one substrate 12.
Are mounted in a concentrated manner, and the mounted components are connected by providing an electric wiring circuit (not shown) in the substrate. Optical wiring component 13
Is placed on the substrate along the periphery of the substrate 12 so that the mounting components 14 and 15 are located at the center of the optical wiring component 13, and the optical connector 13c attached to the branch portion 13a is inserted into the connection port of the mounting component 14. And make a connection. Thus, the optical wiring component 13 and the substrate 12 are arranged substantially in parallel.

In the example of FIG. 3B, the connection of the mounted components on the substrate 12a is performed in the same manner as in FIG. 3A by the optical wiring component 13 arranged along the substrate 12a.
Connection to the mounted component 14 'mounted on another substrate 12b arranged in parallel with 2a can also be performed at the same time. FIG.
In the example of (B), since the optical wiring component 13 is provided with a branch portion 13b protruding toward the outside in addition to the branch portion 13a protruding toward the center portion side, the branch portion 13b is formed by its flexibility. Is folded back to another substrate 12b side to make another substrate 1
By connecting the optical connector 13c to the connection port of the mounted component 14 'mounted on the 2b and connecting the same, the connection between the mounted component 14 on the substrate 12a and the mounted component 14' on the substrate 12b can also be performed. I can do it. In addition, by consolidating the wiring between the substrates as described above, it is possible to avoid the congestion of the optical wiring between the substrates.

[0022]

The optical wiring component of the present invention is an optical wiring component in which an optical fiber core is fixed to a sheet, and the sheet is provided at a peripheral portion surrounding a center of a two-dimensional plane including the center of gravity of the sheet. The optical wiring component is arranged in a shape extending over two or more sides including at least one right-angled bend and having at least one branch portion that branches and protrudes toward the central portion. If used, the main part of the optical wiring component can be arranged along the periphery of the substrate, and the mounted components can be collected and mounted at the center. Therefore, the main portion of the optical wiring component can be arranged in the dead space at the periphery of the substrate, and the size of the substrate can be reduced.

Further, since the insertion of the optical connector into the mounted component can be performed from the side near the peripheral edge of the substrate, the work of inserting the optical connector becomes easy. Further, since the optical wiring component and the mounted component do not come into contact with each other, the heat from the heating element of the mounted component does not damage the optical fiber core of the optical wiring component. Further, since the heating element is not covered by the optical wiring component, heat radiation from the heating element is not hindered by the optical wiring component. In addition, by providing flexibility to the entire optical wiring component or at least the branch portion, it is possible to easily arrange the optical wiring component and insert the optical connector.

Also, since the optical wiring component is bonded and fixed to a plastic film, one multi-core optical connector is attached to the ends of a plurality of optical fibers, The optical fiber core wires wired according to the route pattern described above can be easily arranged and fixed on one sheet. In addition, this makes it possible to form a complicated wiring, which cannot be easily formed by a single-core optical fiber core or a multi-core optical fiber core, as one optical wiring component.

Further, by arranging the optical wiring components at the periphery of the electric board, the space for arranging the optical wiring components is not required in the center of the board, and the mounting density of the board can be increased. It can be downsized. Further, since the optical wiring component can be arranged on the outer peripheral portion of the substrate, heat radiation from the electric component on the substrate is not hindered, and the risk of impairing the characteristics of the electric component is reduced.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are plan views each showing an embodiment of an optical wiring component of the present invention.

FIGS. 2A and 2B are cross-sectional views each showing an example of a part of an optical wiring component in which an optical fiber is bonded and fixed to a sheet.

FIGS. 3A and 3B are perspective views each showing an example in which components mounted on a substrate are connected to each other using the optical wiring component of the present invention.

FIG. 4 is a plan view showing an example of a conventional substrate and optical wiring.

5A and 5B are diagrams showing an example of a substrate and an optical wiring using an optical wiring component in which an optical fiber core is fixed to a plastic film according to the prior art, wherein FIG. 5A is a plan view and FIG. It is.

[Description of Signs] 1a, 1b, 1c: Sheets 2a, 2b, 2c, 2d: Branches 3a, 3b, 3c: Optical fiber cores 4a, 4b, 4c: Optical connectors 5a, 5b, 5c: Central portion 6a, 6b, 6c: Optical wiring component 7: Optical fiber core 8, 8 ': Sheet 9, 9': Adhesive 10: Resin coating 11, 11 ': Optical wiring component 12, 12a, 12b: Substrate 13: Optical wiring component 13a, 13b: branch portion 13c: optical connector 14, 14 ', 15, 15': mounted component

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keiji Osaka 1-chome, Taya-cho, Sakae-ku, Yokohama-shi, Kanagawa F-term in Yokohama Works, Sumitomo Electric Industries, Ltd. (reference) 2H037 AA01 BA02 BA11 DA04 DA31 2H038 AA21 CA52 5E338 AA00 BB63 BB75 CC01 CC10 CD40 EE22

Claims (4)

[Claims] 1. An optical wiring component in which one or a plurality of optical fibers are arranged on a two-dimensional plane and fixed to a sheet, wherein the sheet surrounds a central portion of the two-dimensional plane including the center of gravity. A shape extending over two or more sides including at least one right-angled bend disposed at a peripheral edge portion, and having at least one branch portion that branches and protrudes toward the central portion; An optical wiring component having a terminal connection portion of an optical fiber core at a tip of the optical fiber. 2. The optical wiring component according to claim 1, wherein an optical connector is attached to each terminal of the optical fiber. 3. The sheet according to claim 2, wherein the sheet is at least one plastic film, the optical fiber is adhered and fixed to the plastic film, and the branch has flexibility. 2. The optical wiring component according to 1. 4. An electric board having a light-to-electric conversion function on which a plurality of light-to-electric conversion elements electrically driven on a substrate are mounted, wherein at least one light-to-electric conversion element is connected to an optical fiber. A connection port, and the connection port is fixed on the board with the connection port facing the side closest to the edge of the electric board, and the optical wiring component according to claim 2 is disposed on the electric board. An electrical board, wherein an optical connector attached to the optical fiber core of the branch portion is inserted into the connection port.