JP2009037773A - Connector, cable connecting structure, electronic device and connecting method of connector and base board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector with a compact structure of a connecting part electrically connecting a cable and a circuit board, a cable-connecting structure, an electronic equipment, and a method for connecting the connector and the board. <P>SOLUTION: In the cable connecting structure 1 electrically connecting a printed board 20 with a number of coaxial cables 10 via a connector 30, the connector 30 has a cable connecting part 45 for connecting the coaxial cable 10 at one end, and a contactor 35 having a wiring conductor connecting part 46 connected to a wiring conductor of the printed board at the other end. The wiring conductor connecting part 46 of the contactor 35 and the wiring conductor of the printed board 20 are maintained in an electrically connected state by an adhesive film interposed in between the connector 30 and the printed board 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connector for electrically interconnecting a circuit board and a cable, a cable connection structure, an electronic device, and a method for connecting the connector and the board.

  In general, as an example of a cable connection structure that electrically interconnects a circuit board and a cable via a connector, one disclosed in Patent Document 1 is known. This cable connection structure is applied to electrically connect a thin coaxial cable and a circuit board, and includes a receptacle connector that is surface-mounted on the circuit board and a plug connector that fits into the receptacle connector from the vertical direction of the circuit board. I have. The receptacle connector has a female contact connected to the conductor portion of the circuit board, and the plug connector has a male contact with one end soldered to the coaxial cable. By fitting the receptacle connector and the plug connector, the female contact and the male contact are electrically connected, and the coaxial cable and the circuit board are electrically connected. In this document, the male contact is held by the female contact in the longitudinal direction of the cable. For this reason, the plug connector is provided with a recess for receiving a part of the female contact.

  Moreover, what is disclosed by patent document 2 is known as another example of a cable connection structure. This cable connection structure includes a cable holder that holds a large number of ultrafine cables bent along a plurality of substantially U-shaped cable guide grooves, and a large number of female contacts that are connected to the ultrafine cables in the cable guide grooves. Having a socket. By fitting the cable holder and the socket, the ultrafine cable and the female contact are connected. In this document, the female contact of the socket achieves electrical contact by holding the male contact of the cable holder from above and below.

JP 2005-302417 A Japanese Patent Laid-Open No. 10-255921

  In a connection structure in which a cable and a circuit board are electrically connected via a pair of connectors, a fitting mechanism for fitting the connectors together is required. In order to ensure electrical contact between the male contact and the female contact, one of the contacts can be elastically held by the other contact from the vertical direction or the longitudinal direction (axial direction of the cable). In many cases, it is necessary to provide a space for receiving at least one of the female contacts in a part of the male connector. For this reason, miniaturization of the connector has been hindered. Similarly, it is necessary to provide a recess for receiving at least a part of the male connector in the female connector, and there is a problem that the mounting area on the substrate cannot be reduced. As described above, in the conventional connection structure, it is necessary to increase the connector size or the mounting area on the substrate in order to realize the function of fitting one set of connectors. In addition, the connection structure becomes complicated and the size of the connection structure increases, and there is a problem that it is not possible to cope with the downsizing and thinning of electronic devices such as mobile phones and information terminal devices. In particular, in a mobile phone in which two casings are pivotally connected by a hinge or the like, an operation of passing a cable with a connector for connecting the upper and lower casings to a hole provided in the hinge portion is required. In this case, when the connector attached to the cable is large, not only is the wiring work difficult, but there is a problem that the hinge portion, that is, the hole provided in the hinge cannot be made too small to pass the connector. .

  In view of the above problems, an object of the present invention is to provide a connector, a cable connection structure, an electronic device, and a method for connecting a connector and a board, which have a compact structure of a connection portion that electrically connects a cable and a circuit board. To do.

  In order to solve the above problem, according to one aspect of the present invention, a connector according to the present invention is a connector that is directly fixed to a circuit board, and is fixed to the housing and connected to a number of electric wires. A plurality of contacts, a cable connecting portion for connecting to the signal line of the electric wire, a wiring conductor connecting portion for connecting to the wiring conductor of the circuit board, and a connecting portion for connecting the wiring conductor connecting portion and the cable connecting portion; The cable connecting portion and the wiring conductor connecting portion extend from the connecting portion to the same side.

  Further, according to one aspect of the present invention, the connector according to the present invention is a connector for connecting a circuit board and a cable, and includes a housing and a large number of contacts fixed to the housing and connected to a large number of electric wires. And a contact having a cable connection portion connected to the signal line of the electric wire and a wiring conductor connection portion connected to the wiring conductor of the circuit board, in a direction in which the wiring conductor connection portion intersects the cable connection portion. It is characterized by extending.

  Moreover, according to 1 aspect of this invention, the cable connection structure by this invention is a connector of any one of Claims 1-4 currently connected to many electric wires and the edge part of this electric wire. And a circuit board to which the connector is fixed via an adhesive layer, wherein the contact of the connector and the wiring conductor of the circuit board are directly electrically connected.

  According to one aspect of the present invention, an electronic device according to the present invention includes a pair of housings, and the pair of housings is connected to the pair of housings so as to be openable and slidable. The cable connection structure of any one of Claims 5-7 was applied to the electrical connection between.

  Moreover, according to one aspect of the present invention, a cable connection method according to the present invention includes a step of electrically connecting the connector according to any one of claims 1 to 4 and a plurality of electric wires, and the connector And a step of positioning an adhesive layer between the circuit board and the circuit board, and attaching the connector to the circuit board through the adhesive layer while melting the adhesive layer, and connecting the wiring conductor connecting portion of the connector and the circuit Electrically connecting the wiring conductor of the substrate.

  According to the present invention, since the connector can be reduced in size, the mounting area of the connector on the circuit board can be reduced, and the electronic device to which the connector is applied can be reduced in size and height. Can do.

  Further, according to the present invention, the wiring conductor connecting portion of the contact provided in the connector and the wiring conductor of the circuit board are held in an electrically connected state by the adhesive layer interposed between the connector and the circuit board. Therefore, unlike the conventional cable connection structure, it is not necessary to prepare a pair of male connector and female connector, and the structure of one connector connected to the cable can be made compact. Further, since a coaxial cable is used for the cable connection structure, the flexibility and twistability of the cable can be improved as compared with the case where a band-shaped flexible printed circuit (FPC) is used. Therefore, it is possible to cope with design changes such as higher functionality, smaller size, and lower height of an electronic device in which the upper and lower housings open / close and slide.

Moreover, according to this invention, when a thermosetting adhesive film is used for the adhesive layer which adhere | attaches a connector and a circuit board, for example, while heating a thermoadhesive film to the temperature of 170-230 degreeC, By applying a pressing force of 200 N / cm ² , electrical connection between the contact and the wiring conductor can be performed.

  Specific examples of embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a cable connection structure according to the present invention. The cable connection structure 1 of the present embodiment connects a large number of thin coaxial shield cables (electric wires) 10, a printed circuit board (circuit board) 20 having a predetermined pattern of wiring conductors, and the shield cable 10 to the wiring conductors. The connector 30 includes a large number of contacts 35. By the thermosetting film 5 shown in FIG. 6, the connector 30 is fixed to the printed circuit board 20, and the contactor 35 of the connector 30 and the wiring conductor (contactor connection part 21) of the printed circuit board 20 are directly electrically connected. ing. This cable connection structure 1 can be applied to various electronic devices, and as an example, can be applied to a foldable or slide-type mobile phone or information terminal device.

  A large number of shielded cables 10 are arranged in a horizontal row, and the shield portion 11 of the shielded cable 10 is held between a pair of upper and lower shield bars 36 (FIG. 3). That is, a large number of shielded cables 10 are assembled into the connector 30 after being integrally sub-assembled by a pair of shield bars 36. The shield bar 36 is made of a conductive material such as copper, and the shield portions 11 of all the shield cables 10 are electrically connected via the shield bar 36. One shield bar 36 is electrically connected to a ground frame 37 described later. An electric wire set 34 is composed of a large number of shielded cables 10 and a pair of shield bars 36 and 36.

  The shielded cable 10 is a shielded cable having a wire diameter of about 0.3 mm. The shielded cable 10 has a conductive core wire 12 disposed at the center, an insulating inner coating is formed on the outer side of the core wire 12, and a shield layer as a shield portion 11 is formed on the outer side of the inner coating. An insulating outer coating is formed on the outside (see FIG. 2). Thus, the shielded cable 10 has a multilayer structure, and the core wire 12 and the shield portion 11 are insulated from each other by the inner coating, and the signal current flowing through the core wire 12 is protected from noise by the shield portion 11. .

  The shielded cable 10 is subjected to terminal processing in such a manner that the outer coating and inner coating on the distal end side are peeled to a predetermined length, and the core wire 12 and the shield portion 11 are exposed. The noise current flowing through the shield part 11 flows through the shield bar 36 and the ground frame 37 to the ground conductor part 22 of the printed circuit board 20.

  In addition, this invention does not limit the shield cable 10 to the aspect of this embodiment, It can implement by changing variously the wire diameter and the form of a shield layer. Further, the number of shielded cables 10 is limited by the connector 30 and does not limit the number.

  The printed circuit board 20 is a general one, in which a large number of wiring conductors are printed in a predetermined pattern on an insulating base material made of an epoxy resin or the like. As will be described later, in the present invention, since the adhesive layer is heated by a heater through a printed board, a material and a thickness that do not significantly impair thermal conduction are preferably used. In this respect, a flexible printed circuit (FPC) made of a material such as polyimide having a thickness of about 100 μm or less is particularly suitable. On the connector side of the printed circuit board 20, one end of a large number of wiring conductors is exposed on the upper surface 23 of the printed circuit board 20 (see FIG. 6). The exposed portion of the wiring conductor is formed as a contact connecting portion 21 that is directly connected to the contact 35 of the connector 30. At both ends of the contact connecting portions 21 formed in a line at a predetermined pitch, ground conductor portions 22 that are in contact with the ground frame 37 are formed. A noise current flows from the shield cable 10 to the substrate side via the ground conductor 22. In addition, this invention does not limit the printed circuit board 20 to the aspect of this embodiment, The material of the printed circuit board 20, the pattern of a wiring conductor, etc. can be implemented variously.

  As shown in FIGS. 2 and 3, the connector 30 includes an insulating housing 31, a plurality of contacts 35 that are integrally formed with the housing 31 and connected to the core wires 12 of the individual shielded cables 10, and the housing 31. A shield cover 32 serving as a shield member covered on the upper surface side of the housing 31 and a ground frame 37 provided on the lower surface side of the housing 31 and electrically connected to the shield portion 11 of the shield cable 10.

  The housing 31 can be integrally injection-molded together with the contact 35 and the ground frame 37 using an insulating resin material as a constituent material. The housing 31 has U-shaped wire grooves 33 formed at a predetermined pitch, for example, 0.3 mm pitch, in the longitudinal direction of the housing 31 on the upper surface side where the metal shield cover 32 is covered. . A large number of shielded cables 10 are individually inserted into each wire groove 33, and the multiple shielded cables 10 are held in a row in the housing 31. Since the adjacent shielded cables 10 inserted into the housing 31 are separated from each other by the groove wall of the wire groove 33, the adjacent shielded cables 10 are not in contact with each other.

  A recess (not shown) is formed at a predetermined position where the ground frame 37 is fixed on the lower surface side of the housing 31 which is the side facing the printed circuit board 20. The ground frame 37 contacts the shield part 11 of each shielded cable 10 to flow a noise current to the substrate side, and also serves as a reinforcement for the housing 31.

  The ground frame 37 can be integrally formed from a conductive metal, and includes a long base portion 38 and side portions 39 on both sides of the base portion 38. Solder holes 40 are formed through the base portion 38 at two positions. In the hole 40, the shield bar 36 and the ground frame 37 of the electric wire set 34 are soldered to prevent the solder build-up portion from protruding on the lower surface side of the housing 31. The ground frame 37 is connected to the ground conductor portion 22 of the printed circuit board 20 through the side portions 39 on both sides.

  4 is a view of the state in which the ground frame 37 is fixed to the housing 31 as viewed from the upper surface side of the housing 31. FIG. 5 illustrates the state in which the ground frame 37 is fixed to the housing 31. It is the figure seen from the side. As shown in the drawing, the ground frame 37 is integrally fixed to the housing 31 so that the rigidity in the longitudinal direction of the housing 31 is increased, and the ground frame 37 and the housing 31 are integrally molded. Deformation such as warpage due to molding shrinkage is suppressed, and molding accuracy is increased.

  As shown in FIG. 2, the contactor 35 can be formed by punching a conductive substrate with a press and then bending it into a U-shape. One end of the contact is a cable connecting portion 45 that is connected to the core wire 12 of the shield cable 10 by soldering, and the other end of the contact 35 is in contact with the wiring conductor using a thermosetting adhesive film 5 described later. This is a wiring conductor connection portion 46 that is directly connected to the child connection portion 21. The cable connection portion 45 is formed with a recess 45a. By soldering the core wire 12 of the shielded cable 10 in the recess 45a, the solder is prevented from flowing and a reliable connection is made. In addition, the protrusion due to the build-up of solder can be avoided, and the housing 31 can be prevented from increasing in size.

  Between the cable connection part 45 and the wiring conductor connection part 46 is a connection part 47 that integrally connects the two. FIG. 2 shows a state in which one contact 35 is separated from the housing 31, but the contact 35 is in a state where the wiring conductor connecting portion 46 of the contact 35 protrudes from the lower surface 60 of the housing 31. 31 can be formed integrally. In the connection between the connector and the printed circuit, the adhesive layer disposed between the contact and the wiring body is discharged from between the wiring body and the contact by the pressure at the time of connection, and electrical connection is achieved. Therefore, if there is a space where the adhesive layer is discharged between the connector and the printed circuit, the connection can be made under conditions of lower temperature and lower pressure. If the wiring conductor connecting portion 46 of the contact 35 protrudes from the lower surface 60 of the housing 31, the space generated by the step can play this role.

  Here, it is not required that the cable connection portion 45 and the wiring conductor connection portion 46 extend in exactly the same direction. The contactor 35 may be configured such that the cable connection portion 45 and the wiring conductor connection portion 46 form an angle in the horizontal direction or the vertical direction.

  The contact 35 according to the present embodiment has a U-shape, and the cable connecting portion 45 and the wiring conductor connecting portion 46 are separated from each other and connected to the connecting portion 47. Heat is not easily transmitted to the connecting portion 46. Further, since the cable connecting portion 45 and the wiring conductor connecting portion 46 of the contact 35 extend to the same side of the connecting portion 47, the connector width in the cable longitudinal direction can be reduced.

  The shape of the contact is not limited to the present embodiment. For example, the cable connecting portion 45 and the wiring conductor connecting portion 46 of the contact 35 are connected by a connecting portion 47 in the vicinity of the center in the longitudinal direction. It can be a shape. As another modification, the contact 35 can be formed in a rectangular plate shape. Furthermore, in order to reduce the influence of heating of the adhesive layer, one or more openings (holes) can be provided in the rectangular plate-like contact 35. When one opening is provided, the cable connection portion 45 and the wiring conductor connection portion 46 are spaced apart from each other, so that heat conduction between them can be suppressed. Further, the cable connecting portion 45 and the wiring conductor connecting portion 46 can be connected to the connecting portion at two places on both ends thereof. In this case, the contact has a substantially square shape. Further, the method of fixing the contact 35 to the housing is not limited to this embodiment. For example, it is possible to press-fit a contact that is a separate member into a groove formed in advance in the housing. It is.

  Next, a cable connection method will be described with reference to FIG. FIG. 6 shows a state before the cable 10 is connected to the printed circuit board 20. As shown in the drawing, a sheet-like thermosetting adhesive film 5 is disposed on the contact connecting portion 21 on the upper surface 23 of the printed circuit board 20. A connector 30 in which the cable 10 is incorporated is disposed above the thermosetting adhesive film 5. The wiring conductor connecting portions 46 of the individual contacts 35 and the corresponding contact connecting portions 21 of the substrate 20 are positioned at predetermined positions, the heater 51 is disposed on the lower surface side of the printed circuit board 20, and the thermosetting film 5 is attached. Heat with the heater 51. As shown well in FIG. 2, the connection between the contact 35 of the connector 30 and the wiring conductor of the substrate 20 is performed by melting the thermosetting film 5 by heating by the heater 51 and connecting the connector 30 to the substrate 20. This is done by pressing with a predetermined force. As a result, the connector 30 and the printed circuit board 20 are bonded, and the wiring conductor connection portions 46 of the individual contacts 35 and the corresponding contact connection portions 21 of the substrate 20 are electrically connected. When the contact 35 and the wiring conductor are connected and the thermosetting film 5 is cured, the connection state between the contact 35 and the wiring conductor is maintained. Since the thermosetting film 5 of the present embodiment includes a thermoplastic component, the connection between the contact 35 and the wiring conductor can be maintained even if the thermosetting component is not cured, but the thermosetting film 5 is cured. Thereby, the reliability of a connection state can be improved more.

  The thermosetting film 5 used in the present invention has a thickness of about 30 μm, exhibits fluidity at a predetermined temperature, and has a property of being cured by heating. A thermoplastic component and a thermosetting component Are included at a predetermined rate. As an example, a phenoxy resin can be used as the thermoplastic resin, and an epoxy resin can be used as the thermosetting resin. By adjusting the thermoplastic component and the thermosetting component, the thermosetting film can also be used as a film having repairability. Here, the term “repairability” means that after the film is once bonded, the film can be peeled off by heating and bonded again. In addition, the thermosetting film used is not limited to the aspect of this embodiment, The kind of resin used, a component composition, etc. can be variously changed and used. For example, a polycaprolactone-modified epoxy resin can be used as a thermosetting resin modified with a thermoplastic component.

The temperature and pressure conditions for thermocompression bonding are determined by the resin composition and the like of the selected thermosetting film 5, and are not limited to certain conditions, but as an example, fluidization at 60 to 170 ° C. When a film having a temperature and a curing temperature of 170 to 260 ° C. is selected, a heating temperature of 150 to 230 ° C. and a pressure of 5 to 200 N / cm ² are suitable. As the material of the adhesive layer, it is preferable to select a material that can be bonded at a heating temperature lower than the softening temperature of solder or various adhesives used as an adhesive member for connecting the connector contact and the cable. It is. This is because, when such a material is selected, the possibility of adversely affecting the connection portion between the cable and the contact that are already connected when the adhesive layer is heated is reduced. In addition, in order to improve thermocompression-bonding property, an unevenness | corrugation can be formed by giving an embossing to the crimping | compression-bonding surface which obtains the continuity of the connector 30 or / and the printed circuit board 20. Thereby, conduction can be obtained at a lower temperature and pressure.

  It is also possible to position the connector 30 by providing a positioning projection and fitting it into a hole in the board.

  The positioning between the wiring conductor connection portion 46 of each contactor 35 and the corresponding contactor connection portion 21 of the substrate 20 performed before thermocompression bonding can be performed by various methods, and is limited to a specific positioning method. It is not something. As an example, there are a method of positioning using a positioning pin and a method of positioning by an image recognition method. In the method using positioning pins, a jig having positioning pins is used, a hole for fitting the positioning pin is provided in the printed circuit board 20 and the connector 30, and positioning is performed by fitting the hole into the pin. Although this method is a simple positioning method, since the positioning accuracy is limited, it is not suitable for the connector 30 in which the pitch of the contacts 35 arranged in a row is narrow.

  The image recognition method is a method of positioning by recognizing positioning elements provided on the printed circuit board 20 and the connector 30 through a lens having a predetermined magnification. Specifically, for example, a square pattern is provided as a positioning element on the printed circuit board 20 and the connector 30, respectively, and the positioning element is detected by a CCD camera having a lens with a predetermined magnification, and according to the displacement amount of both positioning elements, By moving either one of the substrate 20 and the connector 30, positioning is performed without any deviation. The method based on image recognition is a method generally used in a mask process of a semiconductor process, and has high positioning accuracy and is suitable for a narrow pitch connector.

  As described above, according to the cable connection structure 1 of the present embodiment, the wiring conductor connecting portion 46 of the contact 35 and the wiring conductor of the printed board 20 are electrically connected by the film 5 interposed between the connector 30 and the printed board 20. Since the connector 30 connected to the cable 10 is compact, the structure of the electronic device to which the cable connection structure 1 is applied is designed to be highly functional, downsized, and low profile. It becomes possible to respond flexibly to changes. Further, since the coaxial cable 10 having a small diameter is used, the degree of freedom of the cable can be increased as compared with the case where a strip-shaped flexible printed circuit body or the like is used.

  In addition, this invention is not restrict | limited to the said embodiment, It can also implement with another form. The present invention is not limited to the use of the thermosetting film 5 as the adhesive layer, but a low melting point lead-free solder, a thermoplastic film or an anisotropic conductive adhesive (ACF) is used. It can also be used. Needless to say, when such a conductive adhesive means is used, the wiring conductor connecting portion 46 of the connector does not need to be in direct contact with the wiring connecting portion of the printed circuit board 20. In order to prevent the influence of heat when the adhesive layer is heated from being transmitted to the surroundings, in particular, the connecting part between the cable connecting part 45 and the cable core wire 12, the adhesive layer is cooled while totally or locally cooled. It is also possible to heat.

  As still another embodiment, the contact can be substantially L-shaped. One portion of the L-shape is arranged substantially parallel to the bottom surface of the connector to form a wiring conductor connection portion, and the other portion of the L-shape is extended upward from the wiring body connection portion so as to be away from the bottom surface of the connector. Let it be a connection part. Then, the core wire 12 is connected to one surface of the cable connecting portion by means of solder or the like. That is, in the embodiment of FIG. 2, the portion corresponding to the connecting portion 47 is an L-shape with the cable connecting portion. Also in this embodiment, the connector width in the cable longitudinal direction can be reduced. The L shape does not require that the cable connection portion and the wiring conductor connection portion form an angle of 90 degrees. In addition, the cable connecting portion and the wiring conductor connecting portion can form an angle in the horizontal direction.

It is a perspective view showing one embodiment of a cable connection structure concerning the present invention. It is sectional drawing of the cable connection structure shown in FIG. It is a disassembled perspective view of the connector shown with an electric wire set. It is the perspective view which looked at the connector which the shielded cable connected from the upper surface side. It is the perspective view which looked at the connector which the shielded cable connected similarly from the lower surface side. It is explanatory drawing explaining a cable connection method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable connection structure 5 Thermosetting adhesive film 10 Shield cable 20 Printed circuit board (circuit board)
21 Contact Connection 30 Connector 35 Contact 45 Cable Connection 46 Wiring Conductor Connection

Claims (9)

A connector for connecting a circuit board and a cable,
A housing;
A plurality of contacts fixed to the housing and connected to a number of electric wires, a cable connection portion connected to a signal line of the electric wire, a wiring conductor connection portion connected to a wiring conductor of a circuit board, and the wiring conductor connection portion And a contact having a connecting part for connecting the cable connecting part,
The connector, wherein the cable connecting portion and the wiring conductor connecting portion extend from the connecting portion to the same side. A connector for connecting a circuit board and a cable,
A housing;
A plurality of contacts fixed to the housing and connected to a number of electric wires, each having a cable connecting portion connected to a signal line of the electric wire and a wiring conductor connecting portion connected to a wiring conductor of the circuit board; Prepared,
The connector, wherein the wiring conductor connecting portion extends in a direction intersecting with the cable connecting portion.   The connector according to claim 1, wherein the wiring conductor connecting portion and the cable connecting portion are separated from each other in a direction perpendicular to a fixing surface of the housing fixed to the circuit board.   The connector according to claim 3, wherein the wiring conductor connecting portion protrudes toward the circuit board from the fixed surface. Many wires,
The connector according to any one of claims 1 to 4, which is connected to an end of the electric wire,
A circuit board to which the connector is fixed via an adhesive layer,
The cable connection structure, wherein the contact of the connector and the wiring conductor of the circuit board are directly electrically connected.   The cable connection structure according to claim 5, wherein the adhesive layer is a thermosetting adhesive film including a thermoplastic component and a thermosetting component.   The cable connection structure according to claim 5 or 6, wherein an adhesive temperature of the adhesive layer is lower than a softening temperature of an adhesive member used for electrical connection between the core of the electric wire and the contact. In an electronic device comprising a pair of housings, the pair of housings being connected to be openable and slidable,
An electronic apparatus in which the cable connection structure according to claim 5 is applied to an electrical connection between the pair of casings. Electrically connecting the connector according to any one of claims 1 to 4 and a plurality of electric wires;
Positioning an adhesive layer between the connector and the circuit board;
Attaching the connector to the circuit board through the adhesive layer while melting the adhesive layer, and electrically connecting the wiring conductor connecting portion of the connector and the wiring conductor of the circuit board;
A method of connecting a connector and a board, comprising:

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