KR100570868B1 - Optical connector for printed circuit board and method thereof - Google Patents

Abstract

The present invention relates to an optical connector for a printed circuit board and a method for manufacturing the same, wherein a plastic or extrusion / molding thermosetting resin is extruded / molded using an ultra-precision MOEMS technology to manufacture a main body having an optical fiber insertion groove having a predetermined shape. Inserting the optical fiber into the optical fiber insertion groove of the main body, applying a predetermined adhesive member to the area where the optical fiber insertion groove of the main body is formed, and then attaching a cover to the area where the optical fiber insertion groove of the main body is formed through the adhesive member The optical connector for a printed circuit board includes a main body in which an optical fiber insertion groove into which an optical fiber is inserted and embedded is formed, and a cover portion attached to a cutting surface on which the optical fiber insertion groove is formed via a curing agent.

Accordingly, the present invention facilitates connection to an external optical waveguide without using a separate device such as a micro lens or a mirror by performing interconnection between layers of a printed circuit board using an optical connector with an optical waveguide embedded therein. It provides the effect that it can be done.

In addition, the present invention also provides the effect that by forming the main body by extrusion / molding, it is possible to mass-produce a mass compared to the existing grooving method to reduce the manufacturing cost.

Optical connector, main body, cover, optical fiber insertion groove, hardener, optical fiber

Description

Optical connector for printed circuit board and method thereof}

1 is a block diagram of an optical connector for a printed circuit board according to the present invention.

Figure 2 is a manufacturing process of the optical connector for a printed circuit board according to the present invention.

Figure 3 is an application of the optical connector for a printed circuit board according to an embodiment of the present invention

Figure 4 is an application of an optical connector for a printed circuit board according to another embodiment of the present invention

5 is an application of the optical connector for a printed circuit board according to another embodiment of the present invention

Explanation of symbols on the main parts of the drawings

10: printed circuit board

100: optical connector

110: body

120: cover

130: cutting surface

140: optical fiber insertion groove

200: optical fiber

300: curing agent

The present invention relates to an optical connector for a printed circuit board and a method of manufacturing the same, and more particularly, a cover attached to a body in which an optical fiber is embedded in an optical fiber insertion groove and an area in which an optical fiber insertion groove of the body is formed by a predetermined adhesive member. It relates to an optical connector for a printed circuit board and a manufacturing method thereof.

In general, a printed circuit board (PCB) is mounted on a plate made of phenol resin or epoxy resin by dense and mounting many parts, and the circuit connecting each part is fixed by pressing on the surface of the resin plate. It means a circuit board.

Such PCB is made by attaching a thin plate such as copper to one side of phenolic resin insulation board or epoxy resin insulation board, and then etching it according to the wiring pattern of the circuit (corroding and removing only the circuit on the wire) to form the necessary circuits. It is made by drilling a hole for mounting.

In addition, such PCBs are classified into single-sided boards, double-sided boards, and multi-layered boards according to the number of wiring circuit surfaces, and the higher the number of layers, the better the mounting force of the components, and thus are employed in high precision products. Single-sided PCB mainly uses phenolic disc as a substrate and is used for products that are relatively complicated in circuit configuration such as radio, telephone or simple measuring instrument. Double-sided PCBs mainly use discs made of epoxy resin and are used in relatively complex circuits such as color TVs, VTRs, or facsimiles. In addition, multilayer PCBs are employed in high-precision devices, such as computers, electronic exchanges, or high-performance communication devices, such as 32-bit or more. Such multilayer PCBs have a conductor pattern on three or more layers, including surface conductor layers that are separated and bonded to each other. Refers to a printed wiring board.

In addition, when a circuit board such as an automation device or a camcorder needs to be moved, and when a circuit board is required to be bent or inserted into a component, a circuit board made of flexibility can be used. This is called a flexible PCB. do.

Meanwhile, when manufacturing a PCB, a circuit pattern is formed on a copper plate to form an inner layer / out layer of the PCB. However, recently, a polymer and an optical fiber are formed. An optical waveguide that can transmit and receive signals with light is inserted into the PCB. This is called EOCB (Electro-Optical Circuit Board).

The EOCB is a mixture of electrical and optical signals, so that high-speed data communication within the same board is interfacing to optical signals, and the copper plate can be converted into electrical signals for data storage / signal processing. The PCB which inserted the optical waveguide and the glass plate in the state which formed the circuit pattern.

Such EOCB technologies include switches and transceivers in communications networks, switches and servers in data communications, communications in Aerospace and Avionics, mobile base stations in Universal Mobile Telecommunications Systems (UMTS), or large high-speed It is applied to a backplane and daughter board in a mainframe / supercomputer and the like.

In addition, as the use of the Internet and the quality of service have increased, data handling and transmission have increased rapidly. As a result, bandwidth and signal processing are required to increase the speed of optical interfacing. The same EOCB was needed. That is, in the conventional PCB, since the electrical signal is limited by the noise (EMS) characteristic at the time of high-speed switching in the gigahertz band, optical interfacing without limitation of the EMS characteristic is required.

Conventionally, as a method of forming an optical waveguide on the multilayer printed circuit board as described above, after forming the optical fiber insertion groove in a predetermined layer layer of the single-layer printed circuit board using a predetermined grooving (Glooving) equipment, the optical fiber The optical waveguide was inserted into the insertion groove to form an optical waveguide on a predetermined layer.

Subsequently, in order to interconnect the optical waveguides formed on the predetermined layer of the printed circuit board as described above, a predetermined layer of the external optical waveguide or the printed circuit board is used by using a separate device, more specifically, a micro lens or a mirror. Optical signals were transmitted by interconnecting optical waveguides formed in the optical waveguides.

However, in the case where the optical waveguide is connected to the printed circuit board according to the conventional method, the optical signal transmitted from the optical waveguide formed on the predetermined layer of the printed circuit board is accurately transmitted to the optical waveguide formed on the other layer. It was not possible to adjust the angle of the optical fiber to have an angle of, more specifically, 45 ⁰ .

In order to solve such a problem, when the microlenses or mirrors are formed in a predetermined area of the printed circuit board, the waveguides / microlenses or mirrors / waveguides have difficulty in aligning with each other, as well as in manufacturing the microlenses or mirrors. There was a problem that difficulty and cost increase.

In addition, in the case of an optical waveguide formed in a conventional printed circuit board, an optical signal can be transmitted by patterning the optical waveguides to be aligned with each other in a single-layer printed circuit board, while through-holes are interconnected between layers. In a printed circuit board forming a multilayer layer, there is a problem in that an optical signal cannot be transmitted because the optical waveguides cannot be interconnected.

The present invention is to solve the problem as described above, by using the optical connector of the optical fiber embedded shape through the optical fiber insertion groove formed at a predetermined angle to perform the inter-layer interconnection of the printed circuit board to transfer the optical signal An optical connector for a circuit board and a method of manufacturing the same are provided.

An optical connector for a printed circuit board according to the present invention for achieving the above object includes a main body having an optical fiber insertion groove of a predetermined shape; And an optical fiber inserted into and aligned with the optical fiber insertion groove, and a cover attached to a portion where the optical fiber insertion groove is formed via a predetermined adhesive member.

Here, the main body and the cover constituting the optical connector according to the present invention are made of a plastic or thermosetting resin capable of extrusion / molding, and the main body accurately covers an optical signal transmitted through an optical waveguide formed between the outer and printed circuit board layers. The optical fiber insertion groove having a predetermined angle, more specifically, an angle of 45 ⁰ and a "V-shape" shape is formed for transmission.

In addition, a method for manufacturing an optical connector for a printed circuit board according to the present invention includes a first step of manufacturing a main body having an optical fiber insertion groove having a predetermined shape; Inserting an optical fiber into the optical fiber insertion groove of the main body; A third step of applying a predetermined adhesive member to a region where the optical fiber insertion groove is formed in the main body; And a fourth step of attaching the cover to an area in which the optical fiber insertion groove of the main body is formed through the adhesive member.

Hereinafter, an optical connector for a printed circuit board and a manufacturing method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of an optical connector for a printed circuit board according to the present invention will be described in detail with reference to FIG. 1.

In the optical connector for a printed circuit board according to the present invention, as shown in FIG. 1, a cut surface in which an optical fiber insertion groove 140 is formed by extrusion / molding a plastic or thermosetting resin capable of extrusion / molding by using a high-precision MOEMS technology. The main body 110 having a 130 and a portion of the cover 120 attached to the cut surface 130 of the main body 110 via a predetermined curing agent 300 applied to the cut surface 130.

Here, the cut surface 130 of the main body 110 is formed by the extrusion / molding using the MOEMS technology as described above the optical fiber insertion groove 140 is inserted and embedded in the optical fiber 200.

At this time, the optical fiber insertion groove 130 is a predetermined angle, more specifically of 45 ⁰ to accurately transmit the optical signal transmitted from the optical waveguide formed on a predetermined layer of the printed circuit board 10 on another layer. It is shaped to have an "V-shape" shape with an angle.

In addition, the radius of curvature of the optical fiber insertion groove 140 may be variously manufactured by extrusion / molding according to the radius of curvature of the product to be produced.

The curing agent 300 inserts the optical fiber 200 into the optical fiber insertion groove 140 formed in the cutting surface 130 of the main body 110 and then attaches the cover 120 to the cutting surface 130 of the main body 110. In order to apply to the cut surface 130 of the main body 110.

 The cover 120 is attached to the cutting surface 130 through which the optical fiber insertion groove 140 of the main body 110 is formed by extrusion / molding using the MOEMS technique as described above via the curing agent 300. It serves to protect the optical fiber 200 embedded in the optical fiber insertion groove 140 formed in the cut surface 130 of the main body 110 from external impact.

Hereinafter, a manufacturing method of an optical connector for a printed circuit board according to the present invention will be described in detail with reference to FIG. 2.

First, a main body having an optical fiber insertion groove formed in a predetermined shape is manufactured (S100).

Referring to Figure 2a in more detail, the main body 110 having a cutting surface 130, the optical waveguide insertion groove 140 is formed by extruding / molding a plastic or thermosetting resin capable of extrusion / molding using an ultra-precision MOEMS technology And a portion of the cover 120 attached to the cutting surface 130 on which the optical waveguide insertion groove 140 is formed via the curing agent 300.

Here, the cut surface 130 formed on the main body 110 is a predetermined surface in order to accurately transmit the optical signal transmitted from the optical waveguide formed on the predetermined layer of the printed circuit board 10 to the optical waveguide formed on the other layer. Extruded / molded to have an angle, more specifically 45 ⁰ .

Thereafter, as shown in FIG. 2B, an optical fiber insertion groove 140 into which the optical fiber 200 is inserted and embedded is formed on the cut surface 130 of the main body 110.

At this time, the optical fiber insertion groove 140 formed in the cut surface 130 of the main body 110 has a predetermined angle corresponding to the angle of the cut surface 130, more specifically, an angle of 45 ⁰ , and also has a "V-shape". "Shaped to have a shape.

Here, it should be noted that the radius of curvature of the optical fiber insertion groove 140 may be variously manufactured by extrusion / molding according to the radius of curvature of the product to be produced.

As described above, after forming the optical fiber insertion groove 140 into which the optical fiber 200 is inserted and embedded on the cut surface 130 of the main body 110, as shown in FIG. 2C, the optical fiber insertion groove 140 is shown. Insert and align the optical fiber 200).

Thereafter, as illustrated in FIG. 2D, the curing agent 300 is applied onto the cut surface 130 of the main body 110 in which the optical fiber 200 is inserted and aligned.

As described above, after the curing agent 300 is applied to the cut surface 130 of the main body 110, as shown in FIG. 2E, the curing agent 300 is disposed on the cut surface 130 of the main body 110. The cover 120 is attached.

Here, the cover 120 serves to protect the optical fiber 200 embedded in the optical fiber insertion groove 140 formed in the cutting surface 130 of the main body 110 from external impact.

After attaching the cover 120 to the cut surface 130 of the main body 110 as described above, as shown in Figure 2f, to cut the optical fiber 200 protruding from the optical fiber insertion groove 140 to the outside. .

Thereafter, as illustrated in FIG. 2G, the optical fiber 200 is embedded by polishing the cut surface 130 of the main body 110 to which the cover 120 is attached via the curing agent 300. Complete the optical connector 100.

After completing the optical connector configured as described above, as shown in Figure 2h, the optical fiber 200 is connected to the optical waveguide formed on a predetermined layer of the printed circuit board 10 and the external optical waveguide By inserting the embedded optical connector 100 on the printed circuit board 10, the optical waveguide formed on a predetermined layer of the printed circuit board 10 and the external optical waveguide are interconnected.

Therefore, the optical connector 100 in which the optical fiber 200 according to the present invention is embedded, as shown in FIGS. 3 to 5, includes an optical waveguide formed on a predetermined layer of the printed circuit board 10 and external light. Various embodiments may be provided for interconnecting waveguides.

Here, it should be noted that the embodiment applied by the present invention is not limited to FIGS. 3 to 5 but may be applied in various forms.

Therefore, according to the optical connector for a printed circuit board according to the present invention and a method of manufacturing the same, by using the optical connector embedded with the optical waveguide to perform the interconnection between the layers of the printed circuit board, a separate lens such as a micro lens or mirror It provides the effect that the connection with an external optical waveguide can be easily performed without using a device.

In addition, the present invention also provides the effect that by forming the main body by extrusion / molding, it is possible to mass-produce a mass compared to the existing grooving method to reduce the manufacturing cost.

Herein, although the present invention has been described with reference to the preferred embodiments, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.

Claims (9)

A main body having an optical fiber insertion groove formed therein; An optical fiber inserted into and aligned with the optical fiber insertion groove; And A cover attached to a portion where the optical fiber insertion groove is formed through a predetermined adhesive member. Optical connector for a printed circuit board, characterized in that configured to include. The method of claim 1, The main body and the cover is an optical connector for a printed circuit board, characterized in that formed by extrusion / molding. The method of claim 1, The body and the cover are optical connectors for a printed circuit board, characterized in that the plastic or the thermosetting resin capable of extrusion / molding. The method of claim 1, The optical connector is for connecting a pair of optical waveguides located on different layers, the optical fiber insertion groove is an optical connector for a printed circuit board, characterized in that formed at an angle of 45 ⁰ to the optical waveguide direction. The method of claim 4, wherein The optical fiber insertion groove is an optical connector for a printed circuit board, characterized in that the "V" shape. A first step of manufacturing a main body having an optical fiber insertion groove having a predetermined shape; Inserting an optical fiber into the optical fiber insertion groove of the main body; A third step of applying a predetermined adhesive member to a region where the optical fiber insertion groove is formed in the main body; And A fourth step of attaching a cover to a region where the optical fiber insertion groove of the main body is formed through the adhesive member; Method for manufacturing an optical connector for a printed circuit board comprising a. The method of claim 6, The main body is an optical connector manufacturing method for a printed circuit board, characterized in that formed by extrusion / molding. The method of claim 6, The optical connector is for connecting a pair of optical waveguides located on different layers, wherein the optical fiber insertion groove is formed at an angle of 45 ⁰ to the optical waveguide direction. The method of claim 6, The optical fiber insertion groove is an optical connector manufacturing method for a printed circuit board, characterized in that formed in the "V-shape" shape.

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