WO2012011193A1 - Structure de liaison entre un substrat souple et un élément associé - Google Patents

Structure de liaison entre un substrat souple et un élément associé Download PDF

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Publication number
WO2012011193A1
WO2012011193A1 PCT/JP2010/062473 JP2010062473W WO2012011193A1 WO 2012011193 A1 WO2012011193 A1 WO 2012011193A1 JP 2010062473 W JP2010062473 W JP 2010062473W WO 2012011193 A1 WO2012011193 A1 WO 2012011193A1
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WO
WIPO (PCT)
Prior art keywords
hole
connection structure
conductor
flexible substrate
counterpart
Prior art date
Application number
PCT/JP2010/062473
Other languages
English (en)
Japanese (ja)
Inventor
平井　孔明
修 多田
宏章 笠井
研史 沼倉
山本　卓
Original Assignee
エヌワイ工業株式会社
平井精密工業株式会社
合同会社Ｄｋｎリサーチ・ジャパン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by エヌワイ工業株式会社, 平井精密工業株式会社, 合同会社Ｄｋｎリサーチ・ジャパン filed Critical エヌワイ工業株式会社
Priority to JP2012525289A priority Critical patent/JPWO2012011193A1/ja
Priority to PCT/JP2010/062473 priority patent/WO2012011193A1/fr
Publication of WO2012011193A1 publication Critical patent/WO2012011193A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits
    • H05K3/365—Assembling flexible printed circuits with other printed circuits by abutting, i.e. without alloying process
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10189—Non-printed connector
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2072—Anchoring, i.e. one structure gripping into another

Definitions

  • the present invention relates to a connection structure between a flexible board and a counterpart member, and in particular, detachably connects a flexible board including a plurality of conductor circuits and a printed board including a plurality of conductor circuits, circuit components, and other counterpart members.
  • the present invention relates to a connection structure between a flexible substrate and a counterpart member.
  • connection techniques and connectors are used as connection means for repeatedly attaching / detaching such a thin flexible substrate to / from other printed circuit boards (PCB, PWB) and circuit components.
  • FFC connector developed for connecting a flexible flat cable (FFC).
  • the connector is soldered and mounted on a printed circuit board, and a terminal portion of a thin flexible circuit board is inserted into the connector. Connection is established.
  • FFC connectors having a low mounting height and a small connection pitch have been developed year by year, and products having a height of 0.8 mm and a connection pitch of 0.3 mm have been put into practical use in the latest design.
  • the other is called a board-to-board connector (BTB connector), which consists of a male / female set, one soldered and mounted on a flexible board, and the other on the mating printed circuit board. And the male and female are fitted together to establish an electrical connection.
  • BTB connector is larger in connection height and more expensive than the FFC connector, but has a higher reliability. Therefore, the BTB connector is frequently used in a mobile phone or a digital camera.
  • BTB connectors having a low mounting height and a small connection pitch have been developed year by year, and products having a height of 1.1 mm and a connection pitch of 0.4 mm have been put into practical use in the latest design.
  • the most commonly used one is a pressure connection.
  • the pad on the flexible substrate and the pad on the printed circuit board are arranged to face each other, and the flexible substrate is attached to the printed circuit board by an elastic body provided on the back surface of the connection surface of the flexible substrate. Crimp and fix with screws or the like (for example, Patent Document 1).
  • the pads on the flexible substrate and the pads on the printed circuit board may be subjected to a corrosion-resistant surface treatment such as gold plating.
  • the above-mentioned pressure contact connection structure is simple, it is often used for thermal print heads for fax machines.
  • the conductor pitch that can be connected is limited to about 1 mm, and is basically unsuitable for connecting multiple rows, so there is a limit to the number of applicable pins (number of conductors). is there.
  • the elastic body is enlarged in order to obtain reliable terminal contact.
  • the elastic body when the number of pins (the number of conductors) increases, the elastic body must be thick, and a configuration with a height of less than 3 mm is difficult.
  • connection structure in which an anisotropic conductive material (ACM) sheet or mat is interposed between the circuits to be connected, and the substrates are fixed by screws or the like.
  • ACM anisotropic conductive material
  • solder fusion connection One conventional connection structure that can reduce the mounting height of the connection part between a flexible substrate and another printed circuit board is solder fusion connection, and the other is a different alternative to solder fusion.
  • solder fusion connection There is a connection by an anisotropic conductive adhesive (ACF) or an anisotropic conductive adhesive (ACP) or an anisotropic conductive adhesive film (ACF) or an anisotropic conductive adhesive (ACP: Anisotropic Conductive Paste). Since the solder fusion connection does not require a special connector or housing, the height of the connection portion can be suppressed to less than 0.3 mm even if a protective tape is included. However, in this connection structure, since a high temperature process of 250 ° C.
  • the terminals can be basically arranged in only one row, and it is difficult to arrange them in an array in order to increase the number of connection terminals. This is because, under a high temperature process, the flexible base material is stretched and the terminal position is displaced, and at the same time, the molten solder flows between the terminals, so that a short circuit accident is likely to occur.
  • the solder fusion connection is a permanent connection structure, and repeated desorption is difficult.
  • terminals are overlapped with each other via an adhesive layer containing conductive particles, and by applying an appropriate temperature and pressure, a current in the thickness direction (vertical direction) flows, but the surface direction ( This is a connection structure that prevents current in the lateral direction from flowing, and a connection structure with a mounting height of less than 0.3 mm and a terminal pitch of less than 0.050 mm is realized by a low-temperature process of less than 150 ° C. .
  • an anisotropic conductive material is used, the electrical conductivity of the joint is low, the resistance is large, and the noise level is also high. Therefore, there is a limit to the application to large current circuits and high-speed transmission circuits.
  • the pitch of the terminal portions can be reduced, the arrangement of the terminals can be basically only one row because of the structure, and it is difficult to arrange them in an array in order to increase the number of connection terminals. This is because even if the pitch can be reduced, a certain distance is required (to ensure insulation between adjacent terminals).
  • the connection by ACF or ACP is a permanent connection structure, and repeated desorption is difficult.
  • Dimple flex connection is yet another connection structure that allows a flexible board to be detachably connected to another printed board.
  • a dimple flex connection structure a portion of a flexible substrate having a conductor pad is pressed from the bottom of the base film to be dimpled, and a ledge is attached. Then, the protrusion is pressed against a flat mating printed circuit board to establish an electrical connection. Further, in order to ensure the connection, pressure is applied by a rubber molding from the back side of the flexible substrate.
  • This connection configuration provides a non-permanent connection structure that can be repeatedly attached and detached any number of times, and can be connected to a multi-pin at a low cost. For example, this connection configuration is often used in an ink cartridge of an ink jet printer. In the latest design, connections with a pitch of about 1.0 mm have been put into practical use.
  • the limit of the pitch is considered to be about 0.8 mm.
  • the conductor pads are arranged in an array, and a circuit is formed between adjacent conductor pads. Since the conductor pads are dimple processed, it is necessary to increase the pitch, and the actual pitch is about 1.5 mm. Therefore, the conductor pitch of the corresponding flexible cable is at most 0.5 mm. is there.
  • the thickness of the rubber molding and the pedestal that supports it must be large, so it is not suitable for the reality of a thin, narrow-pitch multi-pole connection structure. .
  • connection structure using a film-like connector with a bump array has been recently proposed as an example of a connection structure for a flexible substrate that can reduce the mounting height (for example, Non-Patent Document 1).
  • This connection structure is composed of a film-like connector in which a microbump array is formed on a thin heat-resistant film and a flexible substrate having a corresponding female structure.
  • the film-like connector is soldered and mounted on another printed circuit board, and an electrical connection is established by pressing a flexible board having holes formed in accordance with the bump array.
  • the flexible substrate and the mating printed circuit board are electrically connected via the micro-bumps of the film-like connector, it is extremely difficult to form micro-bumps with special structures that penetrate the film with high accuracy. There is a problem that it is difficult and expensive.
  • the simple structure in which the hole of the flexible board is pushed into the microbump there is a problem that the force to hold the flexible board is weak and it is difficult to obtain a highly reliable holding force with excellent impact resistance.
  • the mounting method of the film-like connector on the printed circuit board is different from the case of a rigid printed circuit board, IC chip or other components, and a BGA structure can be obtained by attaching a solder ball or the like to the back side of the flexible film-shaped connector. difficult.
  • connection structure for a flexible board capable of reducing the mounting height a circuit board having a through hole and a pad portion of the conductive protrusion of a film circuit board on which a tapered tapered conductive protrusion is formed.
  • connection structure for example, Patent Document 2, FIG. 42
  • Patent Document 2 FIG. 42
  • connection structure for electrically connecting the flexible board and the printed board the flexible board is stacked on the printed board, and a conductive connector having a diameter larger than the diameter of the through hole of the printed board is provided on the flexible board.
  • An example has been proposed in which electrical connection is established by press-fitting into a through-hole of a printed board so as to penetrate the wiring portion (Patent Document 3).
  • the conductor surface of the connection part of the flexible circuit board is pressed against the conductor surface of the connection part of the printed circuit board to establish an electrical connection.
  • a contact pressure contact member made of a thin plate-like spring member is used has been proposed (Patent Document 4).
  • Patent Document 3 is particularly directed to a technique for electrically connecting a flexible board and a printed board without stripping the coating at the end of the flexible board and without using a connector.
  • the connection structure as in Patent Document 2 does not function effectively unless a good and highly reliable contact state between the conductor portion of the flexible substrate and the connection tool penetrating the flexible substrate is ensured.
  • the flexible substrate must be limited to a specific design specification.
  • the contact state between the conductor part of the flexible substrate and the connection tool penetrating the conductor part may be different for each conductor part. As the number of pins increases, the reliability decreases geometrically.
  • connection structure as disclosed in Patent Document 4 uses a relatively weak pressure contact force of the pressure contact portion of the spring-like member that acts as a fulcrum on the support portion joined to the printed circuit board, so that the flexible substrate can be made relatively easy.
  • the contact holding force between the conductor part of the flexible substrate and the conductor part of the printed board is weak, there is a problem that it is difficult to obtain a highly reliable holding force excellent in impact resistance.
  • connection structure As described above, with the conventional connection structure, it is difficult to physically realize (i) thin, high density, narrow pitch, and multi-pin compatible connection structure that can be repeatedly attached and removed.
  • the force for holding the flexible substrate is weak and it is difficult to obtain a highly reliable holding force with excellent impact resistance.
  • the present invention has been made in view of the above-mentioned problems, and one object thereof is a connection structure that can be repeatedly attached and detached with a very low mounting height, high density, narrow pitch, and multi-pin compatibility.
  • An object of the present invention is to provide a connection structure between a flexible board and a mating member that is realized at low cost.
  • Another object of the present invention is to provide a connection structure between a flexible substrate and a mating member, which realizes a connection structure having excellent impact resistance and a highly reliable holding force at low cost.
  • connection structure of the flexible board and the counterpart member of the present invention includes the first conductor pads connected to each of the plurality of first conductor circuits and arranged in an array.
  • a mating member including, on at least one surface, a flexible substrate including on at least one surface, and second conductor pads connected to each of the plurality of second conductor circuits and arranged in an array;
  • a connector main body that removably connects the flexible board and the mating member, and a reinforcing member that includes a fastening member that engages with another surface of the mating member.
  • the connector body is pressed against the flexible board, and the plurality of first protrusions of the connector body are inserted through the corresponding first through holes of the flexible board and inserted into the second holes of the counterpart member.
  • the fastening member of the reinforcing member By engaging the other surface of the side members, the electrical connection between the first conductor pads and second contact pads, and establishes the pressure via the pressure pad portion.
  • the second hole of the counterpart member is a double-sided through hole or a blind hole having a conductor layer on the inner surface of the hole.
  • an elastic sheet is provided between the other surface of the third base of the connector main body and the one surface of the reinforcing member.
  • each of the plurality of first protrusions and the pressure pad portion is provided between the other surface of the third base of the connector body and the one surface of the reinforcing member.
  • a plurality of corresponding elastic pads are provided.
  • the reinforcing member is formed with a pressing portion having a third surface projecting downward from one surface of the reinforcing member so as to be flexibly supported with respect to the reinforcing member.
  • the third surface of the pressing portion presses the other surface of the third base material.
  • the flexible substrate further includes a third through hole for alignment away from the first conductor circuit and the first conductor pad
  • the counterpart member further includes a fourth hole for alignment apart from the second conductor circuit and the second conductor pad
  • the connector body includes the third through hole and the fourth hole.
  • the second protrusion for alignment corresponding to the above is provided on one surface of the third substrate.
  • the first protrusion has a truncated cone shape
  • the pressure pad portion has a pressure corresponding to the first conductor pad and the second conductor pad. Has a surface.
  • a fixing member for fixing the third base member to the mating member is further provided adjacent to the reinforcing member of the connector body.
  • the fixing member is arranged with respect to the reinforcing member of the connector body such that one end surface of the fixing member is adjacent to the one end surface of the reinforcing member at a predetermined interval.
  • a hinge mechanism in which the connector main body rotates around the portion of the third base material that bridges the fixing member and the reinforcing member is configured.
  • the fixing member further includes a third protrusion that engages with the counterpart member.
  • the reinforcing member of the connector body has at least a pair of fastening members separated in the width direction of the third base material, and in the cross-section in the width direction of the reinforcing member, When the central portion of the reinforcing member is bent toward the third base material side, and the at least one pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member, An engaging portion formed on the distal end side of the fastening member engages with the other surface of the counterpart member, and pushes the counterpart member toward the third base material.
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the third base material of the reinforcing member A plurality of ridges extending in the longitudinal direction are formed at predetermined intervals in the width direction on a surface opposite to the side, and the at least one pair of fastening members is a pair of fifth penetrations provided in the counterpart member correspondingly.
  • the engaging portion formed on the distal end side of the fastening member engages with the other surface of the counterpart member, and pushes the counterpart member toward the third base material.
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the reinforcing member has a predetermined interval in the width direction.
  • the third protrusion of the fixing member has a claw shape, and the claw-like protrusion is inserted into a sixth through hole provided in the counterpart member.
  • the fixing member is fixed to the counterpart member by bending the tip of the protrusion to the other surface side of the counterpart member.
  • the connector module for detachably connecting the flexible substrate of the present invention to the mating member includes at least first conductor pads connected to each of the plurality of first conductor circuits and arranged in an array.
  • a mating member that includes, on at least one surface, a flexible substrate and a second conductor pad that is connected to each of the plurality of second conductor circuits and arranged in an array.
  • a connector main body including a third base member attached to the other surface of the flexible substrate and a fastening member engaged with the other surface of the counterpart member Including the reinforcing member, and the flexible substrate penetrates the flexible substrate in the thickness direction of the flexible substrate in the plane of each of the first conductor pads.
  • the fastening member of the reinforcing member is inserted into a second hole deeper than the thickness of the second conductor pad, which is formed in the depth direction of the counterpart member within the surface of each of the second conductor pads. And the other surface of the mating member are engaged to establish electrical connection between the first conductor pad and the second conductor pad by press contact.
  • connection structure that can be repeatedly attached and detached with a very low mounting height, high density, narrow pitch, and multiple pins.
  • a connection structure having excellent impact resistance and high reliability can be realized at low cost.
  • FIG. 15 is a cross-sectional view taken along line A-A ′ of FIG. 14.
  • FIG. 15 is a cross-sectional view taken along line B-B ′ of FIG. 14. It is sectional drawing which shows before the assembly of the connection structure which concerns on other embodiment of 1st invention. It is sectional drawing which shows the after-assembly of the connection structure which concerns on other embodiment of 1st invention. It is a figure which shows an example of the connector in the connection structure which concerns on other embodiment of 1st invention, (A) is a top view, (B) is a side view of a reinforcement member, (C) is a side view of a connector main body. It is.
  • FIGS. 1A and 1B are an enlarged cross-sectional view showing a main part before assembly of the connection structure according to one embodiment of the first invention, and an enlarged cross-sectional view showing the main part after assembly.
  • the connection structure of the embodiment shown in FIGS. 1A and 1B includes a first conductor pad 13 connected to each of a plurality of first conductor circuits (not shown) included in the first substrate 11.
  • the flexible printed circuit board 10 included in one surface and the second conductor pads 23 connected to each of a plurality of second conductor circuits (not shown) included in the second base material 21 are provided on one surface.
  • a connector main body 30 that detachably connects the flexible substrate 10 and the counterpart member 20 to each other.
  • the flexible substrate 10 includes a first through hole 15 that penetrates the flexible substrate 10 within the plane of the first conductor pad 13 and in the thickness direction of the flexible substrate 10.
  • the mating member 20 includes a second hole 25 that penetrates in the thickness direction of the mating member 20 within the surface of the second conductor pad 23.
  • the connector main body 30 has a first protrusion 33 corresponding to the first through hole 15 of the flexible substrate 10 and the second hole 25 of the counterpart member 20 on one surface of the third base material 31.
  • the first base 11 in the flexible substrate 10 is made of polyimide (PI) resin, polyethylene naphthalate (PEN) resin, epoxy resin, liquid crystal polymer resin, polyether ether ketone (PEEK) resin, polyethylene terephthalate (PET) resin, or the like.
  • a dielectric film made of a heat resistant resin or a polyethylene resin can be used as a base.
  • a plurality of first conductor circuits can be obtained by etching a copper-clad laminate with a copper foil pasted on such a film, or printing a conductive paste or ink on the base. It is formed and covered with a coverlay as necessary.
  • the first through holes 15 penetrating the first conductor pads 13 and the first conductor pads 13 in the thickness direction of the flexible substrate 10 can be formed by a normal etching technique and a through hole processing technique. it can.
  • the second base material 21 of the mating member 20 can be based on a hard glass / epoxy material.
  • a plurality of second conductor circuits can be formed by etching a copper-clad laminate with a copper foil pasted on a glass / epoxy material or on a glass / epoxy material base. Can be formed by printing.
  • the second conductor pad 23 and the second hole 25 penetrating in the thickness direction of the counterpart member 20 through the surface of the second conductor pad 23 are formed by a normal etching technique and a through-hole processing technique (for example, a machine) Or a combination of conventional drilling or laser).
  • the second hole 25 is configured as a double-sided through hole in which a conductive material is plated on the inner peripheral surface.
  • a through-hole forming method is a well-known technique in the manufacture of printed circuit boards, and thus detailed description thereof is omitted.
  • the mating member 20 is not limited to a normal hard printed circuit board, but may be a ceramic substrate, a circuit component (for example, an IC chip or an LSI chip), a multilayer rigid flex, or a relatively thick flexible substrate. May be.
  • the connector main body 30 has a plurality of first protrusions 33 on one surface thereof based on a thin film-like third base material 31.
  • the first conductor pads 13 are arranged in an array on one surface of the flexible substrate 10
  • the second conductor pads 23 are arranged in an array on one surface of the counterpart member 20
  • the first protrusion 33 is formed on the first through hole 15 of the first conductor pad 13 and the second conductor pad 23.
  • the two holes 25 are arranged in an array on one surface of the third substrate 31 (see FIGS. 7 and 10 as an example).
  • a reinforcing member 35 is provided on the other surface of the third base 31 of the connector body 30 to apply an external force to the first protrusions 33 arranged in an array.
  • the reinforcing member 35 preferably has a fastening member (described later with reference to FIG. 14 and the following) that is preferably engaged with the other surface of the counterpart member 20.
  • the thin film-like third substrate 31 is made of polyimide (PI) resin, polyethylene naphthalate (PEN) resin, epoxy resin, liquid crystal polymer resin, polyether ether ketone (PEEK) resin, polyethylene terephthalate (PET) resin, etc.
  • a dielectric film made of a heat resistant resin or a polyethylene resin can be used as a base.
  • the shape of the first protrusion 33 is not particularly limited, but is preferably a columnar shape, more preferably a truncated cone as illustrated. In the present embodiment, the diameter (size) of the first through hole 15 of the flexible substrate 10, the diameter (size) of the second hole 25 of the counterpart member 20, and the cone of the first protrusion 33 of the connector body 30.
  • the diameter (size) of the base of the base is configured to be substantially equal.
  • the first protrusion 33 is configured such that the diameter of the upper base of the truncated cone is not less than 1/4 of the height of the truncated cone, the desired minimum holding for the flexible substrate 10 is achieved. Power can be secured.
  • the material of the first protrusion 33 is manufactured by chemical etching, stainless steel, copper, nickel, phosphor bronze, brass, other metals, and further, electrolytic or electroless plated thereon Is available. It should be noted that in the present invention, the first protrusion does not require conductivity. Therefore, as the material of the first protrusion 33, hard plastic or the like can be used in addition to metal. As the material of the reinforcing member 35, the same material as that of the first protrusion 33 can be selected. When the first protrusion 33 and the reinforcing member 35, which are the main parts of the connector main body 30, are made of plastic, a processing process such as injection molding can be used, which greatly reduces the cost of the connector main body 30. There is an advantage that you can.
  • the connector main body 30 has a simple configuration in which the first protrusion 33 is provided on one surface of the thin film-like third base material 31 and the reinforcing member 35 is provided on the other surface.
  • the lithography can be mass-produced while managing the positional relationship of the first protrusions 33 with extremely high accuracy by a lithography and etching process, further combining electroforming as necessary, or a processing process such as injection molding. That is, according to the current technology, a connector body in which the first protrusions 33 arranged in a high density, narrow pitch, multi-pin array of less than 0.2 mm are formed with an accuracy of ⁇ 0.020 mm or less can be mass-produced. is there.
  • Such a connector main body enables bonding of high-density flexible boards having conductor circuit pitches of less than 0.050 mm. And the assembly of a housing and a terminal like the conventional connector is unnecessary. Therefore, the mounting height can be extremely low while being compatible with high density, narrow pitch, and multiple pins, and the cost can be greatly reduced as compared with the conventional connector.
  • the flexible substrate 10, the mating member 20, and the connector main body 30 configured as described above are arranged in a relationship as shown in FIG. 1A, and an external force is applied vertically from above the reinforcing member 35 of the connector main body 30.
  • the electrical connection between the first conductor pad 13 and the second conductor pad 23 is established by pressure welding. Conversely, by pulling up the connector body 30 and pulling out the first protrusions 33 from the first through holes 15 and the second holes 25, the connection between the flexible substrate 10 and the counterpart member 20 can be released.
  • One of the advantages of the detachable connection structure of this embodiment is that the conductor pads contact each other in a ring shape by pressure contact, and pressure is applied from above by the first protrusion 33 (particularly near the bottom of the truncated cone). Therefore, the reliability of electrical connection is extremely high. Moreover, since the reinforcing member provided on the upper portion of the connector main body 30 effectively applies an external force (pressing force) to the first protrusion, the reliability of the mechanical joining is improved. Furthermore, the height from the surface of the counterpart member 20 is the sum of the thickness of the flexible substrate 10 including the first conductor pads 13 and the thickness of the connector main body 30 including the third base material 31 and the reinforcing member 35. Yes, a connection structure with a very low mounting height can be realized.
  • connection structure of this embodiment is different from the connection structure of the embodiment shown in FIGS. 1A and 1B in that the flexible substrate 20 has the second holes 25 of the counterpart member 20 having substantially the same diameter (size) and The diameter (size) is smaller than the diameter (size) of the lower base of the first protrusion 34 of the connector body 50, and the diameter (size) of the upper base of the connector body 50 is included.
  • the first protrusion 34 is configured such that the diameter of the upper base of the truncated cone is not less than 1/4 of the height of the truncated cone. Preferably it is.
  • the flexible board 40, the mating member 20, and the connector main body 50 configured as described above are arranged in a relationship as shown in FIG. 2A, and an external force is applied vertically from above the reinforcing member 35 of the connector main body 50.
  • One of the advantages of the detachable connection structure of this embodiment is that the ring-shaped contact characteristics between the conductor pads 13 and 23 are further improved by a stronger pressure contact force, and the reliability of electrical connection is further improved.
  • the connector body 50 has a self-holding ability based on frictional coupling.
  • achieve the connection structure of very low mounting height is the same as that of the case of embodiment shown to FIG. 1A and FIG. 1B.
  • connection structure of this embodiment is different from the connection structure of the embodiment shown in FIGS. 2A and 2B in that the connector main body 60 includes the third base material 31 and the first protrusion 34. It is a point which does not have a reinforcement member in the other surface of the material 31.
  • the connector body 60 has a self-holding ability based on the frictional coupling. This may be omitted from the reinforcing members on the other surface of the substrate 31.
  • an appropriate pressure welding tool that sandwiches the mating member 20 and the connector main body 60 from both sides during assembly. Is preferred.
  • the thickness of the connector main body 60 in the connection structure of the present embodiment can be substantially reduced to the thickness of the third base material 31, it is advantageous in that a connection structure with a lower mounting height can be realized. .
  • Other advantages are similar to those of the embodiment shown in FIGS. 2A and 2B.
  • FIG. 4 is an enlarged cross-sectional view showing a main part of a connection structure according to another embodiment of the first invention.
  • the same reference numerals are used for the same components as those shown in FIG. 2B.
  • the connection structure of this embodiment is different from the connection structure of the embodiment shown in FIGS. 2A and 2B in that the mating member 70 is a multilayer substrate having blind via holes. That is, the mating member 70 is formed of a multilayer substrate including a plurality of layers of conductor circuits inside the second base material 22, and the mating member 70 is disposed within the plane of the second conductor pad 23 and the mating member.
  • a conductive material is plated on the inner peripheral surface and the bottom surface of the second hole 27 to form a conductor layer having a predetermined thickness.
  • FIG. 5 is an enlarged cross-sectional view showing a main part of a connection structure according to still another embodiment of the first invention.
  • the connection structure of this embodiment is different from the connection structure of the embodiment shown in FIGS. 2A and 2B in that the mating member 80 is composed of a relatively thin second substrate 24, and the connector body. Adjacent to the 90 reinforcing members 35, a sandwich structure is further provided with a fixing member 37 for fixing the third base material 31 to the other surface (back side) of the counterpart member 80.
  • one end face of the fixing member 37 is disposed adjacent to one end face of the reinforcing member 35 at a predetermined interval, and the fixing member 37 and the reinforcing member 35 are portions of the third base material. 38, and a hinge mechanism in which the connector main body 90 rotates around this portion is formed.
  • the connector main body itself can be provided with an opening / closing mechanism, which facilitates mounting on the mating member 80 and inserting and fixing the flexible substrate 40.
  • FIGS. 2A and 2B Other advantages are similar to those of the embodiment shown in FIGS. 2A and 2B.
  • FIG. 6 is an enlarged cross-sectional view showing a main part of a connection structure according to still another embodiment of the first invention.
  • the connection structure of the present embodiment is different from the connection structure of the embodiment shown in FIGS. 2A and 2B in that the mating member 82 is composed of a very thin second base material 26, and the connector body.
  • 92 is a point which has the 1strium
  • the second hole of the counterpart member 82 is held in the constricted portion of the first protrusion 36 even if the counterpart member 82 is an extremely thin member such as a flexible substrate. In this way, it is possible to effectively prevent the counterpart member 82 from falling off.
  • connection structure of the present embodiment is different from the connection structure of the embodiment shown in FIGS. 3A and 3B in that the first protrusion 39 of the connector body 60 has a bidirectional taper shape having a maximum diameter in the middle in the length direction. It is a point having a cylindrical shape.
  • the first protrusion 39 having such a shape, it is possible to further increase the aspect ratio between the height of the protrusion and the diameter of the upper base of the bilaterally tapered cylinder. Therefore, a more reliable connection can be ensured as compared with the case of the first protrusion 34 having the one-direction tapered truncated cone shown in FIGS. 3A and 3B.
  • the diameter of the upper base of the bi-directionally tapered cylinder is 1 ⁇ 4 or more of the height of the truncated cone.
  • the first protrusion 39 when the first protrusion 39 passes through the smaller first through hole 16A and is inserted into the smaller second hole 25A, the first protrusion 39 is When the inner edge of the first conductor pad 13 is pushed into the second hole 25A (17) to establish a frictional connection between the flexible board 40 and the mating member 20, the connector body 60 is self-holding based on the frictional connection. You will have the ability.
  • the reinforcing member on the other surface of the third base member 31 may be omitted, and the mating member 20 and the connector main body 60 are placed on both sides during assembly.
  • FIGS. 3A and 3B It is preferable to use an appropriate pressure welding tool to be sandwiched from the same as in the embodiment shown in FIGS. 3A and 3B. Further, since the thickness of the connector main body 60 can be substantially reduced to the thickness of the third base material 31, a connection structure with a lower mounting height can be realized, and other advantages are shown in FIGS. 2A and 2B. And the embodiment shown in FIGS. 3A and 3B.
  • the connector main body 60 having the connection structure shown in FIGS. 7A and 7B it is not easy to form the first protrusion 39 having a bi-tapered cylindrical shape as shown in the drawing only by an etching process.
  • the manufacturing cost is remarkably increased.
  • the first protrusion 39 can be formed at low cost, which is advantageous.
  • FIG. 8 is a diagram for explaining a process of forming the first protrusion 39 having a cylindrical shape that is tapered in both directions in the connector main body 60 having the connection structure shown in FIGS. 7A and 7B.
  • a first etching process such as a chemical etching process is performed on a composite sheet obtained by laminating stainless steel, copper, nickel, phosphor bronze, brass, and other metal sheets on the carrier sheet 1131 to obtain a truncated cone-shaped projection 39A. (FIG. 8A).
  • a thin film-like third base material 31 is attached to the upper bottom side of the truncated cone-shaped protrusion 39A, and on the other hand, the carrier sheet 1131 is peeled off from the lower bottom of the truncated cone-shaped protrusion 39A. Then, the third base material 31 having the inverted frustoconical protrusion 39A is formed (FIG. 8B). Next, by performing a second etching process such as a chemical etching process on the third base material 31 having the inverted frustoconical protrusion 39A, a bi-directionally tapered cylinder having a maximum diameter in the middle in the length direction. The connector main body 60 having the first protrusions 39 having the shape is obtained (FIG. 8C).
  • the first protrusions 33, 34, 36 or 39 pass through the first through hole 15 and are inserted into the second hole 25 or 27.
  • the first conductor pad 13 of the flexible substrate 10 and the second conductor pad 23 of the mating member 20 are aligned, and at the same time, a pressure for contacting the conductor pads is applied.
  • the first protrusion is formed in a truncated cone shape or a Mt. Fuji shape (inverted bowl shape) in order to ensure the necessary pressure function in a narrow pitch and multi-pin connection structure.
  • a connection structure according to an embodiment of the second invention described below can be provided.
  • the connector main body 30 ⁇ / b> B particularly corresponds to each of the first through hole 15 of the flexible substrate 10 and the second hole 25 of the counterpart member 20 on one surface of the third base material 31.
  • the connector body 30B is pressed against the flexible substrate 10 in which the first conductor pads 13 are arranged so as to face the corresponding second conductor pads 23 of the counterpart member 20, and a plurality of second connector pads 30 of the connector body 30 are pressed.
  • One projection 33 is inserted through the first through hole 15 of the corresponding flexible substrate 10 and inserted into the second hole 25 of the counterpart member 20.
  • a fastening member (which will be described later with reference to FIG. 14 and later) included in the reinforcing member can be engaged with the other surface of the counterpart member 20.
  • the electrical connection of the 1st conductor pad 13 and the 2nd conductor pad 23 can be established by the press-contact via the pressure pad part 33B.
  • connection structure of this embodiment the 1st protrusion 33 positions and the pressure pad part 33B shares the role of pressurization. And the pressurization function by the pressure pad part 33B is more reliably hold
  • Such a connection structure is particularly suitable when the mating member 20 is a hard substrate and the second pad 23 is formed around a blind via hole (similar to the second hole 27 shown in FIG. 4). It is effective.
  • the first protrusion 33 and the pressure pad portion 33B of the connector body 30B having the above-described structure are manufactured on the third base material 31 with a metal material, a process such as two-stage etching or electroforming can be used.
  • a process such as two-stage etching or electroforming can be used.
  • the height of the surface of the pressure pad portion 33B with respect to the first protrusion 33, the thickness of the pressure pad portion 33B with respect to the third base material 31, and the size of the pressure pad portion 33B are not particularly limited, and are flexible.
  • a person skilled in the art can appropriately determine the material and thickness of the substrate 10, the material, thickness, size, and size of the first hole 15 of the first conductor pad 13. Further, the diameter (size) of the first hole 15 of the first conductor pad 13 of the flexible substrate 10, the diameter (size) of the second hole 25 of the second conductor pad 23 of the counterpart member 20, and the conductor
  • the area (size) of the pads 13 and 23 only needs to be sufficiently accurate to be adapted to the alignment function by the first protrusion 33. Therefore, the accuracy standard in manufacturing parts can be relaxed, which can contribute to improving the yield.
  • the third base 31 and the reinforcing member 35 of the connector main body 30B are illustrated as being laminated via adhesion or the like, but the third base 31 and the reinforcing member 35 are illustrated.
  • the member 35 may be separated without being bonded. With such a separated structure, another material or structure can be inserted between the third base material 31 and the reinforcing member, and a new function can be added.
  • it can be said that it is advantageous in design that the number of connection poles is increased and various structures can be added when the first protrusions are arranged in an array with a narrow pitch and a large area.
  • connection structure of the present embodiment is different from the connection structure shown in FIGS. 9A and 9B in that the third base material 31 and the reinforcing member 35 of the connector main body 30B are separated and elastic between them.
  • the body sheet 32 is interposed. Thereby, the external force which acts on the plurality of first protrusions 33 and the pressure pad portion 33B arranged in an array can be made uniform.
  • the elastic sheet 32 can be expected to have a great effect even when the thickness is less than 0.2 mm by using a material having a large elastic modulus such as silicon rubber or urethane rubber.
  • the area (size) of the elastic sheet 32 can be made equal to the area (size) of the third base material 31.
  • connection structure of the present embodiment is different from the connection structure shown in FIGS. 10A and 10B in that the pressure pad portion 33B is provided between the third base member 31 and the reinforcing member 35 of the connector body 30B that are separated from each other.
  • the elastic sheet 32B having the same area (size) is interposed.
  • connection structure 12A and 12B are an enlarged cross-sectional view showing a main part before assembly of a connection structure according to still another embodiment of the second invention, and an enlarged cross-sectional view showing the main part after assembly.
  • the same reference numerals are used for the same components as those shown in FIGS. 11A and 10B.
  • the connection structure of the present embodiment is different from the connection structure shown in FIGS. 11A and 11B in that the pressure of the reinforcing member 35 among the third base member 31 and the reinforcing member 35 of the connector main body 30B separated from each other.
  • a pressing portion 35B having a third surface projecting downward from one surface of the reinforcing member 35 is formed at a position corresponding to the pad portion 33B by being flexibly supported by the reinforcing member 35 via the arm portion 35C. And the third surface of the pressing portion 35 ⁇ / b> B presses the other surface of the third base material 31 when the reinforcing member 35 is attached to the counterpart member 20. .
  • the reinforcing member 35 is made of a metal material
  • the pressing portion 35B and the arm portion 35C can be formed by an etching process or a punching process.
  • the flexible structure of the arm portion 35C can be obtained by performing plastic deformation, thermoforming, or other processing when the reinforcing member 35 is a metal material.
  • the reinforcing member 35 is a plastic material
  • the flexible structure of the arm portion 35C can be formed at the time of molding.
  • connection structure shown in FIGS. 9A and 9B are an enlarged cross-sectional view showing a main part before assembly, and a modified example of the connection structure (connection structure shown in FIGS. 9A and 9B) according to one embodiment of the second invention, and after assembly It is an expanded sectional view which shows the principal part.
  • connection structure of this embodiment is different from the connection structure shown in FIGS. 9A and 9B in that the first conductive pad 13 on one surface of the first base 11 is formed on the flexible substrate 10D.
  • the counterpart member 20D has a second hole 25D corresponding to the first through-hole 15D of the flexible board 10D, and the connector application 30D. Alignment corresponding to the first through hole 15D of the flexible substrate 10D and the second hole 25D of the mating member 20D separated from the pressure pad portion 33B for pressurization on one surface of the substrate 31 The first projection 33D for use. Even when the connection structure is configured as described above, a stable and reliable contact between the conductor pads is ensured by the pressurizing function by the pressure pad portion 33D in a state of being aligned by the independent first protrusion 33D. be able to.
  • the first protrusion 33D for alignment is preferably provided as close to the pressure pad portion 33B as possible, but the first protrusion for alignment corresponding to each pressure pad portion. If 33D is provided, the area efficiency decreases. Therefore, as an alternative, if a plurality of groups of the plurality of pressure pad portions 33B are formed and several first protrusions 33D for alignment are formed outside each group, the area efficiency can be improved.
  • the first protrusion 33D for alignment is depicted as being formed in a cylindrical shape, but is not limited thereto.
  • the pressure pad portion 33B and the alignment first projection 33D arranged in an array are made of a metal material, they are formed by combining a two-step etching process, electroforming, and stud driving. can do.
  • it when it is made of a plastic material, it can be collectively processed by a mold, which is advantageous for mass production.
  • FIGS. 14, 15A and 15B were constructed.
  • 14 is a plan view of the connector including a part of the unfolded state
  • FIG. 15A is a cross-sectional view taken along line AA ′ in FIG. 14
  • FIG. 15B is a cross-sectional view taken along line BB ′ in FIG. is there.
  • the connector 100 further includes a fixing member 150 that fixes the third base member 131 to one surface of the mating member adjacent to the reinforcing member 135 of the connector main body 130.
  • the fixing member 150 and the reinforcing member 135 of the connector main body 130 are arranged such that one end surface of the fixing member 150 (the end surface on the base 151 side of the substantially U-shaped fixing member 150) is in contact with one end surface of the reinforcing member 135.
  • the hinge mechanism 140 is configured such that the connector main body 130 rotates with the portion of the third base member 131 that bridges the fixing member 150 and the reinforcing member 135 as an axis (see FIGS. 15A and 15B).
  • a slit 143 that crosses the third base member 131 is formed along another surface (the surface on the arm portion side of the substantially U-shaped fixing member 150) adjacent to the fixing member 150 and the reinforcing member 135. Is formed.
  • a pair of second protrusions 137 for alignment are formed on the side opposite to the hinge mechanism 140.
  • the flexible substrate 10 further includes a third through hole 19 for alignment apart from the first conductor circuit (not shown) and the first conductor pad 13,
  • the mating member 20 includes a fourth hole 29 for alignment apart from the second conductor circuit (not shown) and the second conductor pad 23.
  • the second protrusion 137 for alignment of the reinforcing member 135 is provided at a position corresponding to the third through hole 19 and the fourth hole 29, and the diameter (size) of the lower base of the truncated cone is the second.
  • the projection 137 is designed to be coupled to the fourth hole 29 for alignment when it passes through the third through hole 19 and is inserted into the fourth hole 29.
  • a pair of fastening members 139 in the left-right direction (vertical direction in the drawing) is provided at three locations in the longitudinal direction (left-right direction in the drawing).
  • an engaging portion 139A that engages with the other surface of the mating member 20 is formed on the distal end side of the fastening member 139.
  • the portion of the fastening member 139 in the reinforcing member 135 is drawn in an unfolded state before being processed into the structure of the fastening member 139 shown in FIGS. 15A and 15B. I want.
  • the reason why the reinforcing member 135 includes the fastening member 139 is that the first protrusion 133 included in the third base member 131 of the connector body 130 is formed with a protrusion having a large aspect ratio and a sufficient height. This is because the fixing function of the connector main body 130 is supplemented when the fixing function cannot be exhibited only by the first protrusion. For example, when molding a plastic material or driving a stud, a protrusion having a large aspect ratio and a sufficient height can be formed relatively easily. In the etching process of the plate, the protrusion may be formed in a conical shape having a gentle slope, and may not exhibit a sufficient fixing function.
  • the fastening member 139 of the reinforcing member 135 forms a tab-like terminal on the outside of the plate-like reinforcing member 135 as shown in FIG. 14, and the tab-like terminal is illustrated using a block or the like. As shown in FIG. 15A and FIG. 15B, it can be configured by bending downward and forming the end side into a hook shape to form the engaging portion 139A.
  • the fastening member 139 of the reinforcing member 135 is inserted into a fifth hole (not shown) formed in advance in the mating member 150 and is engaged by the engaging portion 139A on the distal end side.
  • the entire reinforcing member is fixed to the counterpart member 150. Simultaneously with this fixing, the electrical connection between the first conductor pad 13 of the flexible substrate 10 and the second conductor pad 23 of the counterpart member 20 is completed.
  • the locked state of the reinforcing member 135 can be released by moving the locked engaging portion 139A slightly outward, and the entire connection structure can be easily released. .
  • the fastening member 139 of the reinforcing member 135 is made of an elastic material and the protruding shape of the engaging portion 139A on the distal end side of the fastening member 139 is appropriate, the fastening member 139 is connected to the mating member 150.
  • An appropriate click feeling can be obtained when it is inserted into a hole 5 (not shown) and locked, and the locked state can be easily released simply by pulling the reinforcing member 135 with an appropriate force. Therefore, even in a connection process in which restrictions on assembly work conditions are severe, attachment / detachment operations with a high degree of freedom can be easily performed.
  • the substantially U-shaped fixing member 150 has four third protrusions 153 that engage with a fifth hole (not shown) provided in the counterpart member 20, and one of the third base members 131. Have on the surface. Such a fixing member 150 is coupled to a fifth hole (not shown) provided in the counterpart member 20 and fixes the third base material 131.
  • a claw-like protrusion 159 is further included as a third protrusion that engages with the counterpart member 20.
  • claw-like projections 159 that form a pair in the left-right direction of the fixing member 150 (up-down direction in the drawing) are provided at three locations in the outer longitudinal direction of the arm portion 152 (left-right direction in the drawing).
  • claw-like projections 159 are also formed on the other end surface side of the base portion 151 of the fixing member 150 (the end surface side opposite to the end surface having the hinge mechanism 140).
  • the claw-like projection 159 of the fixing member 150 is drawn in a developed state before being processed into the claw-like projection 159 shown in FIGS. 15A and 15B. Please keep in mind.
  • the third protrusion 153 of the fixing member 150 has a function of fixing the connector main body to the mating member in addition to the alignment function when the connector main body is mounted. Specifically, it is fixed by soldering or using an adhesive. Prior to mounting the connector body, paste solder or adhesive is applied to the corresponding fourth hole 29 of the counterpart member 20 by screen printing or a dispenser, and the fixing member 150 is mounted thereon. Can be fixed by heating. In the case of soldering, a surface mount reflow process can be used. In addition, in order to obtain high alignment dimensional accuracy and high mounting yield, a heating and pressing method using a hot bar can be used.
  • the claw-shaped protrusion 159 of the fixing member 150 forms a claw-shaped terminal on the outside of the plate-shaped fixing member 150 as shown in FIG. 14, and this terminal is shown in FIG. 15A and FIG. 15B using a block or the like. It can be configured by bending downward.
  • the claw-like projection 159 has the same function as that of the staple, is inserted into a hole (not shown) formed in the mating member 20 in advance, and on the other surface side of the mating member 20, the tip portion Is fixed (clinched) to fix the fixing member 150 mechanically.
  • the fixing member 150 can be removed by mechanically returning the tip of the claw-like protrusions that are folded back.
  • a similar function can be achieved by screwing.
  • the integrally formed claw-shaped protrusion as shown in this embodiment is more advantageous.
  • the connector 100 was manufactured as follows. First, a polyimide film having a thickness of 0.050 mm is used as the third base 131, a phosphor bronze plate having a thickness of 0.200 mm on one side of the film, and a stainless steel having a thickness of 0.100 to 0.200 mm on the other side. The plate is directly heat laminated, and the former is arranged as an arrayed first protrusion 133, an alignment second protrusion 137, and a fixing third protrusion 153 by a photolithography / etching process. The reinforcing member 135 and the fixing member 150 of the connector main body 130 were each integrally processed, and then the outer shape was mechanically cut and finished as a connector material.
  • a part of the base film of the third base member 131 is left in a straight line, and the latter stainless steel plate is etched and removed in a slit shape, thereby fixing the substantially T-shaped connector body 130 and the substantially U-shaped fixing.
  • the hinge function 140 of the member 150 and the third base material 131 that bridges the both could be configured.
  • the slit width of the hinge function 140 is 0.2 mm and can be rotated by ⁇ 90 °.
  • the cross section of the etched first protrusion 133 had a clean Mt. Fuji shape (inverted bowl shape). It was also confirmed that the size of the tip (upper bottom), the size of the skirt (lower bottom), etc. can be changed by changing the etching conditions.
  • the fastening member 139 formed on the outer side of the reinforcing member 135 of the connector main body 130 and the claw-shaped projections formed on the outer side of the fixing member 150 can be easily formed in desired shapes by using blocks having appropriate shapes. It was confirmed that it was obtained.
  • a single-sided circuit and a double-sided through-hole circuit were formed by etching using a material having a base thickness of 0.025 mm and a copper foil thickness of 0.018 mm.
  • a single-sided flexible substrate was prepared by screen-printing a 0.010mm thick silver paste on a polyester film having a base thickness of 0.025mm.
  • a glass / epoxy copper-clad laminate having a thickness of 0.2 mm was processed by a normal etching process as a hard printed board of the counterpart member 20 to obtain a double-sided through-hole board.
  • the flexible substrate 10 and the mating member 20 are respectively formed with conductive pads 13 and 23 arranged in an array shape having the same array dimensions as the array-shaped first protrusions 133 of the connector body 130 and a hole diameter of 0.25 mm. Yes.
  • the fixing structure of the present Example was assembled as follows. First, a fixing member 150 having a tip (upper bottom) diameter of the third protrusion 153 of 0.015 to 0.017 mm is fixed on a rigid printed circuit board as the counterpart member 20 with an isocyanate-based adhesive. did. If the diameter of the skirt portion (lower bottom) of the third protrusion 153 is 0.3 mm or more, the fifth protrusion (not shown) formed in the mating member 20 is manually aligned. We were able to.
  • the claw-like protrusion 159 of the fixing member 150 is inserted into a hole (not shown) formed in the mating member 20 in advance, and the tip end portion is folded back (clinch) 159B on the other surface side of the mating member 20. It was possible to fix mechanically.
  • the hinge mechanism 140 is bent to open the connector main body 130, the flexible substrate 10 is put therein, the connector main body 130 is returned, and the engagement portion 139A on the distal end side of the fastening member 139 is connected to the other surface of the counterpart member 20. Fixed by engaging the side. When locked by the engaging portion 139A, there was a moderate click feeling, and it was confirmed that the connection was completed. Further, for alignment of the flexible substrate 10, edge alignment and alignment of the fourth hole 29 for alignment were used, but it was confirmed that both functions individually.
  • the height after joining was less than 0.25 mm from the printed circuit board surface when a single-sided flexible board was applied. This is less than one third of the thinnest FFC connector and BTB connector currently used in mass production.
  • the contact resistance as a connector was less than 50 milliohms per pin.
  • Example 2 In the configuration of the connector main body 130 of the first embodiment, the first protrusion is replaced with the first base 131 having the first protrusion 133 according to the embodiment of the second invention shown in FIGS. 9A and 9B.
  • the connector was configured using a first base member having 133 and a pressure pad portion having a surface lower than the height of the first protrusion 133 and surrounding each of the first protrusions.
  • the connection structure was configured using the same flexible substrate 10 used in Example 1 and the hard printed circuit board of the mating member 20, the same functions and effects as in the connection structure of Example 1 were confirmed.
  • FIG. 17 is a view showing an example of a connector in a connection structure according to another embodiment of the first invention, in which (A) is a plan view, (B) is a side view of a reinforcing member, and (C) is a connector. It is a side view of a main body.
  • the third base member 131 and the reinforcing member 135 are separated from the fixing member 150, thereby forming an independent connector module as shown in FIG. can do.
  • the first base member 131 and the reinforcing member 135 of the connector main body may be separated as illustrated, and the engaging portion 139A provided on the distal end side of the fastening member 139 included in the reinforcing member 135. May be formed by clinching the front end side of the straight fastening member in the same manner as the claw-shaped protrusion 159 of the fixing member 150 in the first embodiment.
  • the clinch provides a stapling function that mechanically secures the reinforcing member 135, thereby forming a mechanically more reliable and semi-permanent connection structure.
  • the semi-permanent connection structure is not easily attachable / detachable like a ZIF (Zero Insertion Force) type connector, but it can be connected to a mating member such as a connector, flexible board, and hard board by using an appropriate tool.
  • ZIF Zero Insertion Force
  • the connection can be released with minimal damage, the reconnection is possible, and the mechanical strength and reliability equivalent to soldering can be obtained.
  • the engaging portion 139 is formed so that the distal end portion of the fastening member 139 is bent inward, but it has been confirmed that a similar stapling function can be provided even if it is bent outward.
  • the fastening members 139 that form a pair in the left-right direction (up-down direction in the drawing) of the reinforcing member 130 are positioned so as to sandwich both side surfaces of the flexible board (not shown) inside.
  • the width of the flexible substrate is equal to the width of the reinforcing member), or provided at the position of the flexible substrate 10 corresponding to the fastening member 139 in advance or at the time of connection. You may make it penetrate a slot-shaped or slit-shaped hole (not shown).
  • the width of the flexible substrate is larger than the width of the reinforcing member, but if the flexible substrate is thin enough to allow the claw-shaped fastening member 139 to pass therethrough, the flexible substrate is penetrated and the tip portion is folded back. It was confirmed that a sufficient stapling effect can be obtained by clinching.
  • the fastening member 139 can be used in the same way as a needle when fixing a paper or film on the other substrate with a stapler to the flexible substrate 10. Yes.
  • a flat plate is used for the reinforcing member 135 having the fastening members 139 on both side surfaces.
  • the area for arranging the first protrusions in an array is large to accommodate multiple pins.
  • the pressure inside the width direction, particularly in the central portion becomes relatively smaller than the planned pressure, and is due to the pressure contact between the conductor pads. Connection reliability may be biased.
  • Such a problem can be solved by forming an elastic reinforcing member into an appropriate shape and providing elasticity in the thickness direction.
  • FIG. 18 is a view showing a plurality of modified examples of the reinforcing member for a connector in the connection structure according to another embodiment of the first invention, (A) is a side view of the first example, and (B). Is a partial front view of the second example, and (C) is a partial front view of the third example.
  • the reinforcing member 135A having at least a pair of fastening members 139 separated in the width direction of the third base material is shown in the cross section in the width direction. The central portion is bent toward the third base material side (the lower side of the drawing).
  • the reinforcing member 135A having such a structure, when at least a pair of fastening members 139 are inserted into a pair of fifth through holes (not shown) provided in the counterpart member, the fastening members 139 Since the engaging portion formed on the distal end side engages with the other surface of the mating member and pushes the mating member toward the third base material, it is possible to prevent the pressure from being reduced in the central portion. .
  • the reinforcing member 135B having at least a pair of fastening members 139 separated in the width direction of the third substrate is opposite to the third substrate side.
  • a plurality of ridges 1351 extending in the longitudinal direction are formed at predetermined intervals in the width direction, and at least a pair of fastening members 139 are correspondingly provided in a pair of fifth through holes (see FIG.
  • the engaging portion formed on the distal end side of the fastening member 139 engages with the other surface of the mating member and pushes the mating member toward the third substrate side.
  • the reinforcing member 135C having at least a pair of fastening members 139 separated in the width direction of the third base material is formed at a predetermined interval in the width direction. 3 is bent into a waveform 1353 on the side opposite to the base material side, and at least a pair of fastening members 139 is inserted into a pair of fifth through holes (not shown) provided in the counterpart member correspondingly.
  • the engaging portion formed on the distal end side of the fastening member 139 engages with the other surface of the mating member, and pushes the mating member toward the third base material.
  • Reinforcing members having a backbone structure as described above can be made by half-etching, plating, press molding, or a combination of these processes if it is a metal material, and various molding techniques if it is a plastic material. Can be mass-produced.
  • connection reliability at the center of the connector may be reduced.
  • the same constituent materials as in Example 1 When the connection pin arrangement is changed to 15 pins in 5 rows at a pitch of 0.8 mm, if the thickness of the stainless steel sheet as the reinforcing member is 0.2 mm, reliable connection was made at all points.
  • the thickness of the stainless steel sheet was 0.1 mm, there was an example where reliable connection could not be obtained near the center.
  • 0.1 When a stainless steel sheet having a thickness of mm was pressed so as to have a cross-sectional shape as shown in FIGS.
  • FIG. 18A it was confirmed that a connection structure with sufficient high connection reliability can be obtained if there is a deflection amount of 5% or more with respect to the width direction length of the reinforcing member.
  • FIG. 18C it was confirmed that sufficiently high connection reliability was obtained when the amount of corrugation was 0.1 mm, which was the same as the plate thickness.
  • a stainless steel sheet having a thickness of 0.15 mm is etched as shown in FIG. 18B, the thickness of the plate is reduced to 0.1 mm, and a ridge having a width of 0.05 to 0.3 mm is added. It was confirmed that sufficiently high connection reliability was obtained when the reinforcing member having the remaining cross-sectional shape was used.
  • a structure having the simplest and thin structure having a bend at the center shown in FIG. 18A can be manufactured.
  • Such a structure can be formed by press molding using a mold, or can be obtained only by an etching process.
  • the metal sheet produced by the rolling process includes mechanical strain in the surface layer. This distortion is removed by annealing, but is not completely eliminated.
  • the present inventor has found that when the surface of one side of these metal sheets is etched, the distortion on only one side is removed, and the bending occurs naturally without applying external force.
  • the amount of deflection differs depending on the metal material and the etching amount, it has also been found that reproducibility is possible under the same conditions.
  • Modification 3 In the connector module shown in Modification 1 of FIG. 17, the example in which the first base member 131 and the reinforcing member 135 of the connector main body are separated has been described. However, in order to facilitate the assembly of the connection structure, both parts are individually separated. Can be operated. In such a configuration, of course, an individual alignment tool is required, but the operational freedom increases and the mass production cost of each member can be kept small.
  • the configuration of Modification 3 shown in FIGS. 19A and 19B is an example in which the effect of such individual operation can be exhibited. Usually, a counterpart member such as a hard substrate, a flexible substrate, and a connector are manufactured by separate manufacturers, delivered to an equipment manufacturer or a module manufacturer, and finally mounted and assembled.
  • the first through hole does not need to be circular, and may be a polygon, a cross, a star, or other irregular shapes.
  • the first protrusion does not need to have a circular cross section, and may have an irregular shape.
  • Such an irregularly shaped first protrusion may bite into the inner edge of the first conductor pad by appropriately selecting the diameter of the circular first conductor pad so that a part thereof is pushed into the second hole. Since it can be made to act, the reliability of joining can be improved.
  • a connection structure between a flexible substrate and a counterpart member A flexible substrate including, on at least one surface, a first conductor pad connected to each of the plurality of first conductor circuits; A mating member including, on at least one surface, a second conductor pad connected to each of the plurality of second conductor circuits; A connector main body detachably connecting the flexible substrate and the mating member;
  • the flexible substrate includes a first through hole penetrating the flexible substrate in a plane of each of the first conductor pads and in a thickness direction of the flexible substrate;
  • the counterpart member includes a second hole formed in the depth direction of the counterpart member within the surface of each of the second conductor pads and deeper than the thickness of the second conductor pad,
  • the connector main body has a plurality of first protrusions corresponding to the first through hole of the flexible substrate and the second hole of the counterpart member on one surface of a third base material.
  • the connector body is pressed against the flexible substrate in which the first conductor pads are arranged to face the corresponding second conductor pads of the counterpart member, and a plurality of first protrusions of the connector body Through the corresponding first through hole of the flexible substrate and inserted into the second hole of the mating member to mechanically couple the flexible substrate to the mating member; and A connection structure in which an electrical connection between one conductor pad and a second conductor pad is established by pressure welding.
  • connection structure according to (1) wherein the second hole of the counterpart member is a double-sided through hole or a blind hole having a conductor layer on the inner surface of the hole.
  • the first conductor pads are conductor pads arranged in an array on one surface of the flexible substrate, and the second conductor pads are arrayed on one surface of the counterpart member.
  • the first protrusions of the connector main body corresponding to the first through holes of the first conductor pads and the second holes of the second conductor pads.
  • connection structure according to (3) wherein a reinforcing member that applies an external force to the first protrusions arranged in the array is provided on the other surface side of the third base of the connector main body.
  • the flexible substrate further includes a third through hole for alignment apart from the first conductor circuit and the first conductor pad
  • the counterpart member further includes a fourth hole for alignment away from the second conductor circuit and the second conductor pad
  • the flexible substrate further includes a third through hole for alignment apart from the first conductor circuit and the first conductor pad
  • the counterpart member further includes a fourth hole for alignment away from the second conductor circuit and the second conductor pad
  • the flexible substrate includes the first through hole having a size smaller than the second hole of the counterpart member and the first protrusion of the connector body, When the first protrusion penetrates the first through hole and is inserted into the second hole, the first protrusion causes the inner edge portion of the first conductor pad to pass through the second hole.
  • connection structure according to (6) wherein the first protrusion has a truncated cone shape, and a diameter of an upper base is 1 ⁇ 4 or more of a height of the truncated cone.
  • connection structure according to (4) further including a fixing member that fixes the third base member to the mating member adjacent to the reinforcing member of the connector main body.
  • the fixing member is arranged such that one end surface of the fixing member is adjacent to the one end surface of the reinforcing member at a predetermined interval with respect to the reinforcing member of the connector main body, and the fixing member and the reinforcing member.
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the central portion of the reinforcing member is the first portion in the cross section in the width direction of the reinforcing member. 3 is bent toward the base material side, and is formed on the distal end side of the fastening member when the pair of fastening members are correspondingly inserted into the pair of fifth through holes provided in the counterpart member.
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and is formed in a longitudinal direction on a surface opposite to the third base material side of the reinforcing member.
  • a plurality of ridges extending in the width direction are formed at predetermined intervals in the width direction, and when the pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member, the fastening
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the reinforcing member is disposed at a predetermined interval in the width direction with the third base material side.
  • the pair of fastening members are bent on the opposite side, and are formed on the tip side of the fastening member when the pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member.
  • the third protrusion of the fixing member has a claw shape, the claw-like protrusion is inserted into a sixth through hole provided in the counterpart member, and the tip of the claw-like protrusion is connected to the other member.
  • a connection structure between a flexible substrate and a counterpart member A flexible substrate including, on at least one surface, first conductor pads connected to each of the plurality of first conductor circuits and arranged in an array; A mating member including, on at least one surface, second conductor pads connected to each of the plurality of second conductor circuits and arranged in an array; A connector main body detachably connecting the flexible substrate and the mating member; A reinforcing member including a fastening member that engages with the other surface of the counterpart member;
  • the flexible substrate includes a first through hole penetrating the flexible substrate in a plane of each of the first conductor pads and in a thickness direction of the flexible substrate;
  • the counterpart member includes a second hole formed in the depth direction of the counterpart member within the surface of each of the second conductor pads and deeper than the thickness of the second conductor pad,
  • the connector main body has a plurality of second electrodes arranged in an array corresponding to the first through hole of the flexible board and the second hole of the counterpart member on one surface of the
  • the connector body is pressed against the flexible substrate in which the first conductor pads are arranged to face the corresponding second conductor pads of the counterpart member, and a plurality of first protrusions of the connector body Is inserted through the corresponding first through hole of the flexible substrate and into the second hole of the counterpart member, and the fastening member of the reinforcing member is engaged with the other surface of the counterpart member.
  • an electrical connection between the first conductor pad and the second conductor pad is established by pressure contact via the pressure pad portion.
  • a plurality of elastic pads respectively corresponding to the plurality of first protrusions and the pressure pad portion are provided between the other surface of the third base of the connector main body and the one surface of the reinforcing member.
  • a pressing portion having a third surface protruding downward from one surface of the reinforcing member is formed to be flexibly supported with respect to the reinforcing member.
  • the flexible substrate further includes a third through hole for alignment apart from the first conductor circuit and the first conductor pad,
  • the counterpart member further includes a fourth hole for alignment away from the second conductor circuit and the second conductor pad,
  • connection structure according to (16) further including a fixing member that fixes the third base member to the mating member adjacent to the reinforcing member of the connector main body.
  • the fixing member is arranged such that one end surface of the fixing member is adjacent to the one end surface of the reinforcing member at a predetermined interval with respect to the reinforcing member of the connector main body, and the fixing member and the reinforcing member
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the central portion of the reinforcing member is the first in the cross section in the width direction of the reinforcing member. 3 is bent toward the base material side, and is formed on the distal end side of the fastening member when the at least one pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member.
  • the connection structure according to (16) wherein the engaged portion engages with the other surface of the counterpart member and pushes the counterpart member toward the third base material.
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the longitudinal direction is opposite to the third base material side of the reinforcing member.
  • a plurality of ridges extending in the direction are formed at predetermined intervals in the width direction, and when the at least one pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member,
  • the reinforcing member of the connector main body has at least a pair of fastening members separated in the width direction of the third base material, and the reinforcing member and the third base material side at predetermined intervals in the width direction. Bent to the opposite side, and formed at the distal end side of the fastening member when the at least one pair of fastening members are correspondingly inserted into a pair of fifth through holes provided in the counterpart member.
  • the third protrusion of the fixing member has a claw shape, the claw-like protrusion is inserted into a sixth through hole provided in the counterpart member, and the tip of the claw-like protrusion is connected to the other member.
  • a connector module for detachably connecting a flexible substrate to a mating member A flexible substrate including, on at least one surface, first conductor pads connected to each of the plurality of first conductor circuits and arranged in an array;
  • the flexible substrate is detachably connected to a mating member including second conductor pads connected to each of a plurality of second conductor circuits and arranged in an array on at least one surface.
  • a connector body including a third base material attached to the other surface of the flexible substrate;
  • a reinforcing member including a fastening member that engages with the other surface of the counterpart member;
  • the flexible substrate includes a first through hole penetrating the flexible substrate in a plane of each of the first conductor pads and in a thickness direction of the flexible substrate;
  • the connector body corresponds to the first through hole of the flexible board on one surface of the third base material, and the connector body is attached to the flexible board, and is connected to the flexible board.
  • a plurality of first protrusions arranged in an array protruding from the surface of A plurality of first protrusions protruding from one surface of the flexible board are formed in the surface of each second conductor pad of the counterpart member and in the depth direction of the counterpart member.
  • the first conductor pad and the second conductor pad are inserted into a second hole deeper than the thickness of the conductor pad, and the fastening member of the reinforcing member and the other surface of the mating member are engaged with each other.
  • the electrical connection of Connector module is provided.
  • the present invention is suitable for a flexible substrate and a mating member connection structure that detachably connects a flexible substrate including a plurality of conductor circuits, a printed circuit board including a plurality of conductor circuits, circuit components, and other mating members.
  • a connection structure in which a thin flexible board is repeatedly attached to and detached from other printed boards and circuit components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Combinations Of Printed Boards (AREA)

Abstract

L'invention a pour objet de mettre en œuvre une structure de liaison à haute densité et à pas étroit recevant des broches multiples et susceptible d'être accrochée et décrochée de façon répétée avec une hauteur de montage extrêmement faible et un coût faible, caractérisé en ce qu'un substrat souple (10) comprend un premier trou débouchant (15) traversant le substrat (10) dans le sens de son épaisseur à l'intérieur de la surface d'une première plage (13) de contact. Un élément associé (20) comprend un deuxième trou (25) le traversant dans le sens de l'épaisseur de l'élément à l'intérieur de la surface d'une deuxième plage (23) de contact. Un corps principal (30) de connecteur présente, sur une surface d'un troisième matériau (31) de support, une première protubérance (33) correspondant au premier trou débouchant (15) du substrat souple (10) et au deuxième trou (25) de l'élément associé (20), ainsi qu'une partie (33B) de plage de pression entourant la première protubérance. Le corps principal (30) de connecteur est plaqué contre le substrat souple (10), sur lequel la plage (13) de contact est disposée da manière à faire face à la plage (23) de contact, afin de faire passer la première protubérance (33) à travers le premier trou débouchant (15) et de l'insérer dans le deuxième trou (25), et de faire coopérer un élément de fixation d'un élément (35) de renfort avec l'autre surface de l'élément associé, établissant ainsi une liaison électrique entre les plages de contact par une soudure par pression via la partie de plage de pression.
PCT/JP2010/062473 2010-07-23 2010-07-23 Structure de liaison entre un substrat souple et un élément associé WO2012011193A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012525289A JPWO2012011193A1 (ja) 2010-07-23 2010-07-23 フレキシブル基板と相手側部材の接続構造
PCT/JP2010/062473 WO2012011193A1 (fr) 2010-07-23 2010-07-23 Structure de liaison entre un substrat souple et un élément associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/062473 WO2012011193A1 (fr) 2010-07-23 2010-07-23 Structure de liaison entre un substrat souple et un élément associé

Publications (1)

Publication Number Publication Date
WO2012011193A1 true WO2012011193A1 (fr) 2012-01-26

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PCT/JP2010/062473 WO2012011193A1 (fr) 2010-07-23 2010-07-23 Structure de liaison entre un substrat souple et un élément associé

Country Status (2)

Country Link
JP (1) JPWO2012011193A1 (fr)
WO (1) WO2012011193A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101459480B1 (ko) * 2013-06-21 2014-11-07 현대자동차 주식회사 플렉시블 인쇄회로기판의 연결 유닛 및 그 연결 방법
EP3683895A1 (fr) * 2019-01-21 2020-07-22 Japan Aviation Electronics Industry, Limited Connecteur, ensemble carte de circuit et structure de connexion
CN117812831A (zh) * 2024-03-01 2024-04-02 四川科尔威光电科技有限公司 柔性薄膜电路的制备方法及有助于剥离的刚性固定装置
DE102022211465A1 (de) 2022-10-28 2024-05-08 Robert Bosch Gesellschaft mit beschränkter Haftung Verbindungsanordnung, Batteriemodul mit einer solchen sowie Verfahren zur Herstellung einer solchen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004095446A (ja) * 2002-09-02 2004-03-25 Sharp Corp 基板接続構造
JP2008166087A (ja) * 2006-12-28 2008-07-17 Jst Mfg Co Ltd Ｆｐｃ接続用コネクタ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004095446A (ja) * 2002-09-02 2004-03-25 Sharp Corp 基板接続構造
JP2008166087A (ja) * 2006-12-28 2008-07-17 Jst Mfg Co Ltd Ｆｐｃ接続用コネクタ

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101459480B1 (ko) * 2013-06-21 2014-11-07 현대자동차 주식회사 플렉시블 인쇄회로기판의 연결 유닛 및 그 연결 방법
EP3683895A1 (fr) * 2019-01-21 2020-07-22 Japan Aviation Electronics Industry, Limited Connecteur, ensemble carte de circuit et structure de connexion
CN111463597A (zh) * 2019-01-21 2020-07-28 日本航空电子工业株式会社 连接器、布线板组装件和连接结构
US10797418B2 (en) 2019-01-21 2020-10-06 Japan Aviation Electronics Industry, Limited Connector, circuit board assembly and connection structure
CN111463597B (zh) * 2019-01-21 2021-04-27 日本航空电子工业株式会社 连接器、布线板组装件和连接结构
DE102022211465A1 (de) 2022-10-28 2024-05-08 Robert Bosch Gesellschaft mit beschränkter Haftung Verbindungsanordnung, Batteriemodul mit einer solchen sowie Verfahren zur Herstellung einer solchen
CN117812831A (zh) * 2024-03-01 2024-04-02 四川科尔威光电科技有限公司 柔性薄膜电路的制备方法及有助于剥离的刚性固定装置
CN117812831B (zh) * 2024-03-01 2024-06-04 四川科尔威光电科技有限公司 柔性薄膜电路的制备方法及有助于剥离的刚性固定装置

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