JP2018160407A - Connector connection structure and connection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector connection structure and a connection method that allow an optical part to be connected to a PWB in a state of maintaining electrical contact and being easily removable, in which a probability in which a lead is bent and damaged at the time of attaching/detaching of a connector is low, and that facilitates solder work.SOLUTION: In a connector connection structure for connecting an optical component having a convex connector to a concave connector, a plurality of wires are formed on at least one surface of the convex connector, and a plurality of wires corresponding to the wires of the convex connector are provided in the concave connector, the concave connector is an opening portion formed on a printed wiring board and having a plurality of wires or a concave connector having springiness.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connector structure and a connection method.

  Development of optical transceivers is progressing as a front end of optical communication equipment that supports optical communication in recent years. The communication speed of the optical transceiver has been practically used up to 100 Gbps, and further higher speed is desired. At the same time, there is a demand for compact and high-density mounting, and it is necessary to develop an optical transceiver that satisfies both. In order to cope with high speed, polarization multiplexing and phase modulation are adopted, and as means for realizing it, an optical module for phase modulation is built in the optical transceiver. In order to control the optical module for phase modulation, it is necessary to control not only a high-speed modulation signal but also a voltage to a plurality of electrodes at the same time, and a large number of control wirings are required to perform the control.

  The challenge in developing such products is the process of once mounting the optical transceiver, which is a component, on a printed wiring board (hereinafter abbreviated as PWB: Printed Wiring Board), and the PWB. This is a mixture of processes that are performed without using the optical transceiver alone. The process that is once implemented is, for example, a process in which various voltages are applied to each pin of the optical transceiver to measure the optical output, and the process that is performed without being mounted is, for example, an airtight test.

  First, the “process once performed” will be described. In one process, an optical transceiver is temporarily mounted on a PWB, and various voltages are applied from the PWB side to measure characteristics. If the process performed without mounting on the PWB is in the previous process or the subsequent process, the optical transceiver needs to be detached from the PWB. For example, if there are processes in the order of an A process performed by mounting and a B process performed without mounting, it is necessary to attach and detach the optical transceiver that is mounted in the A process and removed in the B process. However, recent optical transceivers have a large number of pins, and there is a high possibility that the pins will be bent when attaching and detaching. For connecting the existing optical module and the printed board, as shown in FIG. 9, lead pins 911 are prepared on the optical module 901 side and soldered after passing through the through-hole 930 prepared on the PWB 905 side. However, as shown in FIG. 10, if there are a large number of lead pins (for example, 50 pins), the lead pins may be bent during insertion into the PWB or in the optical module manufacturing process.

  There is also a connection method using a flexible substrate (hereinafter referred to as a flexible substrate) for connection of a large number of pins and flexible wiring. However, in the manufacturing process, it may be necessary to bend the flexible board due to the structure of a mounting machine (manufacturing apparatus) for mounting components in a package (hereinafter abbreviated as PKG (Package)). If the bending direction in the mounting machine is different from the bending direction when mounting in the optical transceiver which is the final product form, the flexible substrate may be wrinkled and may not return to its original state.

  Next, the “process performed without mounting” will be described. In the airtight test, a test gas is sealed in a housing in which an optical transceiver is mounted, and it is checked whether the gas leaks from the housing. A flexible substrate (hereinafter abbreviated as “flexible substrate”) absorbs gas. Therefore, in the case of a hermetically sealed type PKG, when performing a hermetic test during the manufacturing process, if the flexible substrate is connected, the flexible substrate absorbs the test gas. As a result, the expected airtight test result cannot be obtained. Therefore, it is necessary to remove the flexible board once, conduct an airtight test, and then remount it.

  For the two reasons described above, it is desirable that the optical component can be easily detached from the PWB.

  Also, the soldering of optical modules to PWBs is often performed in the customer (delivery) manufacturing process. Therefore, it is desirable to be able to connect easily in the customer's manufacturing process and to sufficiently satisfy the connection strength. Therefore, a product form and a connection method that take the manufacturing process into consideration are necessary.

  Patent Document 1 discloses an optical / electrical connector having a plug-side connector and a receptacle-side connector. One end of an optical transmission means such as an optical fiber is connected to the plug-side connector 20, an optical signal transmitted through the optical fiber is converted into an electrical signal by a photoelectric conversion element, and the converted electrical signal is a plurality of conductors 23a to 23a. Is output to 23h. The receptacle-side connector 40 is mounted on a substrate, and a plurality of conductors 44 that are partially exposed are formed.

  By fitting the plug-side connector to the receptacle-side connector, the conductor 23 and the conductor 44 come into contact with each other, and an electric signal is transmitted from the plug side to the receptacle side. ((0020)-(0021) paragraphs, FIGS. 1-3)

JP 2006-030868 A

  In Patent Document 1, the conductor 23 and the conductor 44 are brought into contact with each other to make an electrical connection. However, this is not a strong connection and may come off when subjected to vibration or impact. Soldering is desirable for a firm connection, but Patent Document 1 is based on the premise that the plug-side connector 20 is fitted to the receptacle-side connector 40 mounted on the substrate 3, and soldering is not considered. As can be seen from FIGS. 2 and 3, a plurality of conductors 44 formed on the outer side of the island-like protrusion 42 of the receptacle-side connector 40 and a plurality of conductors 44 formed on the inner side of the “B” -shaped plug-side connector 20. The conductor 23 is brought into contact. The plug-side connector 20 has a “B” shape, and the inside of the “B” shape is not open and is closed. In other words, the ceiling is closed when viewed from the receptacle-side connector 40. With such a shape, it is impossible to solder the conductor 23 and the conductor 44 at the time of contact.

  The object of the present invention is to solve the above-mentioned problems, connect an optical component to a PWB while ensuring electrical contact and can be easily removed, and bend it by bending the lead when the connector is attached or detached. Another object is to provide a connector structure and a connection method that are easy to solder and that can be easily soldered.

The present invention is a connector connection structure for connecting an optical component having a convex connector to a concave connector,
A plurality of wires are formed on at least one surface of the convex connector, and the concave connector is provided with a plurality of wires corresponding to the wires of the convex connector,
The concave connector is an opening formed on a printed wiring board in which a plurality of wirings are formed, or a connector connection structure characterized by being a spring-shaped concave connector.

The present invention also provides a connector connection method for connecting an optical component having a convex connector to a concave connector,
A plurality of wirings are formed on at least one surface of the convex connector, a plurality of wirings corresponding to the wirings of the convex connector are provided in the concave connector, and the convex connector is inserted into the concave connector. A connection method characterized in that a part of each wiring of the convex connector and the concave connector is brought into contact to establish electrical connection therebetween.

  According to the present invention, it is possible to connect the optical component to the PWB in a state where electrical contact is ensured and can be easily removed, and it is less likely to be damaged by bending the lead when the connector is attached or detached, A connector structure and a connection method that can be easily soldered are obtained.

It is a perspective view of the optical module provided with the convex connector of the 1st Embodiment of this invention. It is a perspective view which shows the concave connector 200 by the side of PWB205 for connecting with the convex connector part 103 and the exterior. FIG. 3 is a perspective view showing a state where a convex connector 103 of an optical module 100 is inserted into a concave connector 200. It is a figure which shows the cross-sectional shape of wiring. It is a perspective view which shows the example which made the arrangement | positioning of the wiring in the upper surface and lower surface of a convex-type and a concave-type connector staggered. It is a figure which shows the 2nd Embodiment of this invention, and is a perspective view which shows the example which provided the taper in the convex connector. It is a perspective view which shows the 3rd Embodiment of this invention. Springy connector It is a perspective view which shows the background art of this invention. It is a perspective view which shows another background art of this invention.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.
(Convex connector on the optical module side)
FIG. 1 is a perspective view of an optical module having a convex connector according to a first embodiment of the present invention. In this embodiment, the optical module 100 other than the convex connector portion 103 is referred to as an optical module main body 101. An example of the optical module 100 is a hermetically sealed ceramic PKG mounted with an optical element. The optical module 100 is obtained by making the side surface of the optical module main body 101 into a convex shape. This convex connector portion 103 is connected to a PWB concave connector described later. The optical fiber 105 is connected to the optical module main body 101 via the optical connector 107. In the optical module main body 101, the optical connector 107 and the optical module element are connected by optical wiring. Neither the optical module element nor the optical wiring is shown. The optical module element includes, for example, a photoelectric conversion element, an amplifier, a drive circuit, and the like.

  An enlarged view of the convex connector 103 is shown on the front side of FIG. The convex connector portion 103 has an elongated flat plate shape protruding from the side surface of the optical module body 101, and forms a plurality of wirings (wiring patterns 153a and 153b) on the convex upper surface 103a and lower surface 103b, respectively. The wiring patterns 153a and 153b are obtained by drawing the electrical wiring from the optical module 100 onto the convex upper surface 103a and the lower surface 103b.

In the present embodiment, shallow concave portions 109 are provided along the wiring pattern on the upper surface 103 a and the lower surface 103 b of the convex connector portion 103. The cross section of the recess has a shape obtained by dividing the ellipse in half in the major axis direction. Wiring patterns 153 a and 153 b are formed in the shallow concave portion 109. The cross section of each wiring 111 a constituting the wiring pattern 153 a has a semi-elliptical shape along the cross sectional shape of the recess 109. Similarly, the cross section of each wiring 111b constituting the wiring pattern 153b also has a semi-elliptical shape along the cross sectional shape of the recess 109. The upper surfaces of the wirings 111a and 111b are planes. In order to ensure electrical connection with the concave connector of the PWB, the upper surfaces of the wirings 111a and 111b may be slightly raised so that the cross-sectional shape thereof becomes elliptical. The surface may be flattened without being raised.
(PWB concave connector)
FIG. 2 is a perspective view showing a concave connector 200 on the PWB 205 side for external connection with the convex connector portion 103. The concave connector 200 is formed by making a hole in a place where the optical module 100 of the PWB 205 is mounted. The inner dimension of the concave connector 200 is slightly larger than the outer dimension of the convex connector 103 in order to insert the convex connector 103.

  The wiring pattern 253a on the upper surface 203a of the concave connector 200 is in contact with the wiring pattern 211a on the upper surface 103a of the convex connector 103 to make an electrical connection. Similarly, the wiring pattern 253b on the lower surface 203b of the concave connector 200 is in contact with the wiring pattern 211b on the lower surface 103b of the convex connector 103 to make an electrical connection.

  In the present embodiment, the upper surface 203a and the lower surface 203b are flat surfaces, and the wiring patterns 253a and 253b are formed on the flat surface as shown in FIG.

  Similar to the convex connector 103, shallow concave portions 209 are provided on the upper surface 203a and the lower surface 203b of the concave connector portion 200 along the wiring pattern. The cross section of the shallow recess 209 has a shape in which an ellipse is divided in half in the major axis direction. Wiring patterns 253a and 253b are formed in the shallow recess 209.

The cross section of each wiring 211a constituting the wiring pattern 253a has a semi-elliptical shape along the cross sectional shape of the shallow recess 209. Similarly, the cross section of each wiring 211b constituting the wiring pattern 253b also has a semi-elliptical shape along the cross sectional shape of the recess 109. In order to ensure electrical connection with the concave connector of the PWB, the upper surfaces of the wirings 211a and 211b may be slightly raised so that the cross-sectional shape thereof becomes elliptical. The surface may be flattened without being raised.
(Description of operation)
As shown in FIG. 3, the convex connector 103 of the optical module 100 of FIG. 1 is inserted into the concave connector 200 of the PWB 205 of FIG. The inner dimension of the concave connector 200 is slightly larger than that of the convex connector 103. The convex connector 103 is inserted into the concave connector 200 halfway. This is a state in which the convex connector is lightly inserted into the concave connector, and each corresponding wiring of both connectors contacts only in a partial region of the wiring. This contact ensures an electrical connection. Further, since the contact is made only in a part of the area of each wiring, the convex connector 103 and the concave connector 200 are connected with a weak frictional force. Therefore, the optical module 100 can be easily removed from the PWB 200. In this state, a characteristic test is performed by applying a power supply voltage and a signal to the optical module 100 from the concave connector 200 of the PWB 205 via the convex connector 103. The test is, for example, applying an analog voltage to the optical module 100 and measuring the intensity of the optical output.

  In this embodiment, even if the process after the test is a process performed by removing the optical module 100, it can be handled without any problem. Even when a plurality of insertions / removals are required in the manufacturing process, the PWB can be easily attached and detached.

  Further, even when an airtight test is performed during the manufacturing process, the test gas is not absorbed by removing the flexible substrate from the optical module.

  In this embodiment, since the optical module and the PWB can be easily attached and detached, it is possible to flexibly cope with the case where the order of the manufacturing process is to be changed.

Further, after the optical module 100 is completed and delivered to the customer, which is a supplier, the customer forms a wiring on the PWB side when the optical module 100 and the PWB are solder-connected in the manufacturing process performed by the customer ( (Metalizing) makes it easy to solder and improves workability. Since it is soldered, it can be strong enough to withstand vibration and impact.
(Explanation of effect)
According to the present embodiment, the optical component is physically connected to the PWB while ensuring electrical contact and can be easily removed, so that the optical component is detached after the characteristic measurement or the PWB is detached before the airtight test. Easy to separate.

  The wiring formed on the convex connector is a leadless wiring that does not protrude from the connector surface toward the concave connector. Similarly, the wiring formed in the concave connector is a leadless wiring that does not protrude in the direction from the connector surface toward the convex connector. Therefore, when attaching / detaching the connector, the lead is not damaged by bending.

  In addition, soldering of optical modules to PWB is often performed in the manufacturing process of the customer (delivery party), but since the wiring is formed on the convex connector and the concave connector, soldering work is easy. . Soldering can secure the necessary strength to withstand vibration and impact.

  In FIGS. 1 and 2, the cross-sectional shape of the wiring is elliptical, but the wiring is not limited to this and may be a rectangular cross-section as shown in FIG. The surface (connection surface) on which the wiring 311a of the convex connector and the corresponding wiring 311b of the concave connector are formed is flat.

  Further, as shown in FIG. 4B, the wiring 411a and the wiring 411b may be formed as they are on the flat surfaces of the convex connector and the concave connector.

  Further, the wiring may have a shape as shown in FIG. A shallow recess 509a as shown in FIG. 1 is formed in the convex connector, and a wiring 511a having an elliptical cross section is formed in the recess so as to rise slightly from the connection surface. On the other hand, a shallow concave portion 509b corresponding to the shallow concave portion 509 is formed on the concave connector, and a wiring 511b is formed along the shape of the concave portion. Even if the wiring 511b is formed, the surface is not flattened and a dent is left. That is, the wiring has a raised shape that fits into the recess. When the convex connector is inserted in this state, the contact area is increased between the wiring having a convex cross section of the convex connector and the wiring having a concave cross section of the concave connector, and the electrical connection becomes more reliable. Contrary to FIG. 4 (c), as shown in FIG. 4 (d), a wiring having a concave cross section may be formed on the convex connector, and a wiring having a convex cross section may be formed on the concave connector.

  Further, as shown in FIG. 5, when viewed from above the optical module, the wiring may be arranged in a staggered manner, that is, differently from each other on the upper surface and the lower surface of the convex connector (or the concave connector). Such an arrangement may be used, or an arrangement in which the upper and lower wirings are aligned as seen from above the optical module as shown in FIG. It can be freely adopted according to the pattern design of the optical module.

In this embodiment, the wiring is formed on both sides of the convex connector, but the wiring may be formed only on one side. The same applies to the concave connector, and the wiring may be formed only on the inner surface facing the one side surface on which the wiring of the convex connector is formed.
(Second Embodiment)
In FIG. 1, the shape of the convex connector 103 is a rectangular parallelepiped, and the surface on which the wiring is formed is parallel in the vertical direction. However, as shown in FIG. 6, it is possible to provide a taper 300 whose thickness decreases as the distance from the optical module increases on the surface on which the wiring of the convex connector is formed. That is, the cross section of the convex connector is tapered so that the width is narrowed in the direction toward the concave connector. The thickness of the tip of the taper is made smaller than the opening size of the concave connector. On the other hand, the concave connector of PWB is not tapered, and the opening dimension is the same in the direction toward the optical module. The opening dimension is set such that the taper stops halfway when the convex connector is inserted.

Then, when the convex connector is inserted, it stops in the middle of the taper, the convex connector is lightly inserted into the concave connector, and each corresponding wiring of both connectors makes contact with only a part of the area of the wiring . This contact ensures an electrical connection. Further, since the contact is made only in a part of the area of each wiring, the convex connector 103 and the concave connector 200 are connected with a weak frictional force. Since the taper is formed in this embodiment, the contact area between the wirings of both connectors can be made constant as compared with the first embodiment, and the contact is made more reliably. In addition, if the optical module is inserted from above the PWB, in addition to the frictional force between the convex connector and the concave connector, gravity due to the weight of the optical module itself is also added, which also makes the electrical connection more reliable become.
(Third embodiment)
In the first and second embodiments, the concave connector has a wiring formed inside the opening of the PWB. However, as shown in FIG. 7, wirings 720a and 720b corresponding to the wiring of the convex connector may be formed on the surface of the convex connector around the opening of the PWB. In this way, soldering becomes easier. A wiring 750a and a wiring 750b for electrical connection with 720a and b are provided on the optical module main body side of the convex connector. The wirings 750a and 750b are connected to wirings formed on the upper surface and the lower surface of the convex connector, respectively.

Although not shown, wiring may be formed inside the opening as in the first embodiment, and the wiring may be extended to the periphery of the opening.
(Other embodiments)
The present invention can also be applied to high-frequency wiring such as 32 Gbps by wiring impedance design. In addition, the convex connector of the present invention can be connected not only to the PWB but also to the spring-like connector 800 as shown in the cross section of FIG.

100, 901 Optical module 101 Optical module main body 103 Convex connector 103a Upper surface 103b Lower surface 153a, 153b, 253a, 253b Wiring pattern 109, 209 Shallow recess 111a, 111b, 211a, 211b, 311a, 311b, 411a, 411b, 511a, 511b Wiring 153a, 153b, 253a, 253b Wiring pattern 200 Recessed connector 203a Upper surface 203b Lower surface 205, 905 PWB
300 Taper 720a, 720b Wiring 750a, 750b Wiring 800 Springy connector 911 Lead pin 930 Through hole

Claims (10)

A connector connection structure for connecting an optical component having a convex connector to a concave connector,
A plurality of wires are formed on at least one surface of the convex connector, and the concave connector is provided with a plurality of wires corresponding to the wires of the convex connector,
2. The connector connection structure according to claim 1, wherein the concave connector is an opening formed on a printed wiring board and formed with a plurality of wirings, or a concave connector having a spring property.   The connector connection structure according to claim 1, wherein a plurality of wires corresponding to the wires of the convex connector are provided on an inner surface of the opening.   The connector connection structure according to claim 1, wherein a plurality of wires corresponding to the wires of the convex connector are provided around the opening.   The cross-sectional shape of the convex connector is a tapered shape whose width is narrowed in the direction toward the concave connector, and the cross-sectional shape of the concave connector is a shape having no taper in the direction toward the convex connector. 4. The connector connection structure according to any one of 3 above.   5. A concave portion is provided at a location where the convex connector wiring is formed, the wiring is formed in the concave portion, and the wiring of the concave connector into which the convex connector is inserted is a raised wiring that fits into the concave portion. The connector connection structure according to any one of the above.   The concave portion is provided at a portion where the wiring on the concave connector surface is formed, the wiring is formed in the concave portion, and the wiring of the convex connector inserted into the concave connector is a raised wiring that fits into the concave portion. The connector connection structure according to any one of 4.   The connector connection structure according to any one of claims 1 to 6, wherein wiring is formed on an upper surface and a lower surface of the convex connector, and the upper surface wiring and the lower surface wiring are arranged in a staggered manner. A connection method for connecting an optical component having a convex connector to a concave connector,
A plurality of wirings are formed on at least one surface of the convex connector, a plurality of wirings corresponding to the wirings of the convex connector are provided in the concave connector, and the convex connector is inserted into the concave connector. A connection method characterized in that a part of each wiring of the convex connector and the concave connector is brought into contact to establish electrical connection therebetween.   The connection method according to claim 8, wherein the optical component is tested after the electrical connection is made, and the convex connector is removed from the concave connector after the test is completed.   9. The cross-sectional shape of the convex connector is a tapered shape whose width is narrowed in the direction toward the concave connector, and the cross-sectional shape of the concave connector is a shape having no taper in the direction toward the convex connector. 9. The connection method according to 9.

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