CN207321631U - Stiffener placed on bridge wires on back of dual channel flex circuit - Google Patents

Abstract

The utility model provides a bridging line with a reinforcing plate arranged on the back of a double-channel flexible circuit board, which comprises a double-channel flexible circuit board, a first connecting interface and a second connecting interface which are oppositely arranged at two sides of the front of the double-channel flexible circuit board and form electric connection, the first connecting interface comprises a first bridge connector with a first socket and a first terminal group and a first reinforcing plate, the second connecting interface comprises a second bridge connector with a second socket and a second terminal group and a second reinforcing plate, the first bridge connector and the second bridge connector can be respectively connected to the bridge connector of two display cards, so as to connect the two display cards with different intervals to form an arbitrary bridge connection state, and the first reinforcing plate and the second reinforcing plate can be respectively combined on the back of the two ends of the double-channel flexible circuit board to increase the structural strength, so that a user is not easy to cause circuit fracture or damage of a welding structure due to drawing or excessive bending, can be conveniently plugged and unplugged so as to meet the convenience of plugging and unplugging use.

Description

Stiffener placed on bridge wires on back of dual channel flex circuit

technical field

The utility model provides a bridging line in which a reinforcing board is placed on the back of a dual-channel flexible circuit, especially two display cards with different distances can be connected by using the first connection interface and the second connection interface of the dual-channel flexible circuit board to form a bridging state. , and the strength of the overall structure is increased by the reinforcing plate combined on the back of the two ends to improve the convenience of plugging and use.

Background technique

According to the rapid development of electronic technology nowadays, the computing speed and performance of computers and servers are getting faster and faster. In addition to the central processing unit and memory on the mainboard of the computer or server as the information processing center, Various screens, modems and other peripheral equipment are also the focus of computer, server and other electronic devices for screen display, data transmission and command control. You can use the slots on the motherboard to install various types of interface cards to make peripherals The device can transmit data between the interface card and the electronic device and be used as an expansion purpose.

Moreover, as people continue to pursue images on the screen, the resolution and performance requirements of the display interface are getting higher and higher. Some manufacturers have developed an expandable link that can bridge two display cards and use them as a single output. Interface (Scalable Link Interface, referred to as SLI) technology, mainly in the two slots arranged side by side on the motherboard supporting SLI technology to install graphics cards respectively, and a bridging terminal connector is provided on the top of each graphics card, which can be reused The multiple connectors of the dual-graphics card bridge are respectively connected to the bridge end connectors of the two display cards to form a bridging state, so that the motherboard can use the image processors on the two display cards for parallel computing (Parallel Computing), and 3D graphics processing to achieve the best graphics display performance, but with the advancement of integrated circuit technology, the hardware architecture of dual graphics cards gradually declined until the emerging virtual reality and mixed reality technologies gradually prevailed. In order to process more complex The functions of computing and graphics acceleration, etc., the dual-graphics card bridging technology has been valued again, and it is mainly used in the current mainstream Peripheral Component Interconnect Express (PCI Express) standard to solve the confluence of the early expansion interface. Due to the problems of insufficient transmission structure and insufficient bandwidth, dual graphics cards can fully utilize high-speed graphics display performance through SLI technology.

However, the existing dual-graphics card bridges on the market can be roughly divided into single-channel flexible board bridges, single-channel or dual-channel hard board bridges, and the upper and lower layers of the flexible board of the traditional single-channel flexible board bridges are The signal layer has an insulating layer in the middle. Due to the physical limitations of the flexible base material and circuit layout method and structure of the flexible board manufacturing process, the double-layer flexible board cannot respond to the design trend of high transmission rate and high efficiency, and it can be used in high-speed transmission. In application, it is easy to produce high-frequency signal reflection and skin effect in the transmission process. Although the dual-channel hard board bridge can use the power layer and ground layer of the middle two layers to improve electrical characteristics (such as characteristic impedance), but with The high-frequency signal transmission channel and working bandwidth of the multi-layer flexible board application increase, but there are still problems such as thicker thickness, insufficient flexibility and high characteristic impedance requirements, so the traditional single-channel flexible board bridge connection In terms of application, double-layer flexible boards are still the mainstream, which cannot support signal transmission for high-end graphics card bridging.

Furthermore, since a large number of electronic components (such as central processing unit, display card, memory, hard disk and input/output devices, etc.) 1. The internal space of the server chassis is limited by the size of the specification, that is, the stability of the overall system and the convenience of maintenance and replacement must be considered to facilitate the user's operation, but the thickness of the traditional single-channel flexible board bridge is relatively thin Moreover, the flexibility is high, so that when the user pulls or presses down the bridges on both sides of the front of the flexible board to plug and unplug the bridge end connector of the display card, it is easy to break due to the insufficient structural strength of the flexible substrate. It affects the assembly effect and structural stability, and even excessive bending causes its circuit breakage or damage to the welding structure. Therefore, under the consideration of the overall thickness and structural strength of the bridge, how to design a bridge that is convenient for users The plugging action is performed in a limited space, and without increasing the thickness of the soft base material, the structural strength of the bridging end connector is improved when plugging and unplugging, so as to effectively solve the structural damage caused by excessive bending, so as to ensure The stability and effect of high-frequency signal transmission are the key points that people in this industry want to study and improve.

Utility model content

Therefore, in view of the above-mentioned existing problems and deficiencies, the designer of this utility model collects relevant materials, evaluates and considers them in many ways, and makes use of many years of experience in research and development in this industry to continuously try and modify. Improve the structural strength of the bridge when plugging and unplugging without increasing the overall thickness of the dual-channel flexible circuit board, and facilitate the user to plug and unplug the bridge and dual graphics cards, and can be arbitrarily adjusted according to the different spacing of the dual graphics cards A new type of bridging wire with a bridged stiffener placed on the back of a dual-channel flex circuit was born.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A bridging line with a reinforcing plate placed on the back of a dual-channel flexible circuit, characterized in that it includes a dual-channel flexible circuit board and a first connection interface and a second connecting interface that are arranged on both sides of the front side of the dual-channel flexible circuit board to form electrical connections. Two connection interfaces, among which:

The dual-channel flexible circuit board sequentially includes a first insulating layer, a first wiring layer, a second insulating layer, a grounding layer, a third insulating layer, a second wiring layer and a fourth insulating layer;

The first connection interface includes at least two first bridges with first sockets and a first reinforcing plate with a plurality of sockets, and the internal slots of the first sockets are all pierced with one side of the first terminal group A plurality of docking parts, and each docking part is provided with a welding part that passes through the bottom of the first socket to form an electrical connection with the first circuit layer, the ground layer, and the second circuit layer respectively, and the first reinforcement board is combined with the dual-channel flexible circuit board On the back of one end of the two-channel flexible circuit board, and the first terminal group passes through the welding part on the back of the dual-channel flexible circuit board and inserts them into the corresponding jacks respectively;

The second connection interface includes at least two second bridges with second sockets and a second reinforcing plate with a plurality of sockets, and the internal slots of the second sockets are all pierced with the second terminal group on one side A plurality of docking parts, and each docking part is provided with a soldering part passing through the bottom of the second socket to form an electrical connection with the first circuit layer, the ground layer, and the second circuit layer, and the second reinforcing plate is combined with the dual-channel flexible circuit board On the back of the other end, the second terminal group passes through the welding part on the back of the dual-channel flexible circuit board and is respectively inserted into corresponding sockets.

The reinforcing plate is placed on the bridging line on the back of the dual-channel flexible circuit, wherein: the hole diameters of the first reinforcing plate and the second reinforcing plate are respectively larger than the cross sections of the welding part of the first terminal group and the welding part of the second terminal group Dimensions, so that the welding part will not contact with the socket of the first reinforcement board and the second reinforcement board.

The reinforcing board is placed on the bridging line on the back of the dual-channel flexible circuit, wherein: the first reinforcing board and the second reinforcing board are rectangular, and a long side of the first reinforcing board and the second reinforcing board are aligned on one short side of the dual-channel flexible circuit board, and the two short sides of the first reinforcement board and the second reinforcement board are respectively attached to the two long sides of the dual-channel flexible circuit board, and the first reinforcement board and the second reinforcement board The ends of the two short sides of the plate respectively extend out from the outer sides of the first bridge and the second bridge to form a height difference shape.

The reinforcing board is placed on the bridging line on the back of the dual-channel flexible circuit, wherein: the first reinforcing board and the second reinforcing board are respectively glass fiber boards, steel sheets, polypropylene, polyethylene terephthalate of flame-resistant material grade FR4 It is made of glycol ester or ceramic material, and the thickness of the first reinforcement board and the second reinforcement board is between 0.4mm and 1.0mm.

The reinforcing plate is placed on the bridging line on the back of the dual-channel flexible circuit, wherein: a glue layer is provided on one side of the first reinforcing plate, and the first reinforcing plate is bonded to the double-channel flexible circuit board through the glue layer. On the back of one end, another adhesive layer is provided on one side of the second reinforcing board, and the second reinforcing board is combined with the back of the other end of the dual-channel flexible circuit board through the other adhesive layer.

The reinforcing board is placed on the bridging line on the back of the dual-channel flexible circuit, wherein: the glued layer is double-sided adhesive paper, hot melt adhesive, epoxy resin, polyester resin or acrylic resin, and the thickness of the glued layer is between Between 0.005 and 0.20mm.

The main advantage of the utility model is that the two sides of the front of the dual-channel flexible circuit board are oppositely provided with the first bridge of the first connection interface, and the second bridge of the second connection interface forms an electrical connection, and the dual-channel flexible circuit board The first reinforcing plate and the second reinforcing plate are respectively combined on the back of the two ends of the circuit board, so that the first bridge and the second bridge can be respectively connected to the bridge end connectors of the two display cards to connect different pitches. The two display cards form any bridge state, and the two display cards can be used to improve the performance of faster computing and graphics display of the dual-graphics system, and the dual-channel flexible circuit can be added through the first reinforcement board and the second reinforcement board The plate corresponds to the structural strength of the end of the bridge, so that the user is not easy to break the line or damage the welding structure of the bridge due to excessive bending by pulling or pressing down, so that the plugging action can be easily performed to meet the needs of the user. Or the convenience of plugging and unplugging.

Another advantage of the present invention is that when the user wants to pull up the first bridge and the second bridge, the ends of the two short sides of the first reinforcing plate and the second reinforcing plate can be used to extend the first bridge respectively. It forms a level difference with the second bridge, so that the user's fingers can stably hook the end of the first reinforcement plate or the second reinforcement plate without loosening or slipping off, and pull up the first bridge or the second bridge together. The bridge is detached from the bridge end connector of the display card, so that it can be easily plugged and unplugged, which improves the inconvenience of use and improves the function and effect of the overall use.

Another advantage of the present invention is that the first reinforcement board and the second reinforcement board are respectively provided with a glue layer on one side of the surface, and the first reinforcement board and the second reinforcement board are strengthened and pressed on the dual-channel flexible circuit board through the glue layer Air bubbles are not easy to be generated on the back of the two ends of the two-channel flexible circuit board to ensure their mutual bonding characteristics, and at the same time, the first bridge and the second bridge are inserted into the corresponding soldering parts of the two terminal groups through the back of the dual-channel flexible circuit board. In the socket, and the pressure-sensitive glue used in the glued layer can also penetrate into the socket, so as to improve the bonding strength.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a three-dimensional exploded view of the utility model.

Fig. 3 is a three-dimensional exploded view of another viewing angle of the utility model.

Fig. 4 is a structural schematic diagram of the dual-channel flexible circuit board of the present invention.

Fig. 5 is a schematic structural diagram of a dual-channel flexible circuit board in a preferred embodiment of the present invention.

Fig. 6 is a three-dimensional appearance view of another preferred embodiment of the present invention before connection.

Fig. 7 is a three-dimensional appearance view of another preferred embodiment of the present invention after connection.

Fig. 8 is a perspective view of another preferred embodiment of the utility model.

Description of reference signs: 10-dual-channel flexible circuit board; 101-first flexible substrate; 102-second flexible substrate; 103-third flexible substrate; 11-first insulating layer; 111-first film; 112-first bonding layer; 12-first circuit layer; 121-first conductor; 13-second insulating layer; 131-second film; 132-second bonding layer; 133-third bonding layer; 14-grounding layer; 141-metal conductor; 15-third insulating layer; 151-third film; 152-fourth bonding layer; 153-fifth bonding layer; 16-second circuit layer; 161-second conductor; 17-th Four insulation layers; 171-fourth film; 172-sixth bonding layer; 18-via hole; 20-first connection interface; 21-first bridge; 211-first socket; 2111-insert slot; 212 - the first terminal group; 2121 - the docking part; 2122 - the welding part; 22 - the first reinforcement plate; 221 - the socket; 222 - the glue layer; Two sockets; 3111-socket slot; 312-second terminal group; 3121-docking part; 3122-welding part; 32-second reinforcement board; 321-jack; Motherboard; 411-PCI-E slot; 42-display card; 420-chipset; 421-transmission interface; 422-bridge connector; 4221-metal contact;

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and the structure thereof adopted by the utility model are hereby illustrated in detail with respect to the preferred embodiment of the utility model. Its structure and function are as follows, so as to fully understand it.

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, and Fig. 5, which are respectively the three-dimensional appearance diagram, the three-dimensional exploded view, the three-dimensional exploded view of another angle of view, the structural schematic diagram of the dual-channel flexible circuit board and The schematic diagram of the structure of the dual-channel flexible circuit board of the preferred embodiment, it can be seen clearly from the figure that the reinforcing board of the present utility model is placed on the bridge line on the back of the dual-channel flexible circuit to include a dual-channel flexible circuit board 10 and is relatively arranged on the The first connection interface 20 and the second connection interface 30 are electrically connected at two sides of the front side of the dual-channel flexible circuit board 10, wherein:

The dual-channel flexible circuit board 10 includes a first insulating layer 11, a first wiring layer 12, a second insulating layer 13, a grounding layer 14, a third insulating layer 15, a second wiring layer 16 and a fourth insulating layer 17 upwards in sequence. , the first insulating layer 11 has a first thin film 111, and a first bonding layer 112 is provided on the upper surface of the first thin film 111 to form a cover film, and the first conductor 121 of the first wiring layer 12 is passed through the first A bonding layer 112 is bonded on the first film 111, and the lower surface of the second film 131 of the second insulating layer 13 is provided with a second bonding layer 132 bonded to the first conductor 121, and on the second film 131 The surface is provided with a third bonding layer 133, the grounding layer 14 is arranged between the first circuit layer 12 and the second circuit layer 16, and the metal conductor 141 of the grounding layer 14 is combined with the second circuit layer 133 through the third bonding layer 133. On the film 131; In addition, the third film 151 lower surface of the third insulating layer 15 is provided with the fourth bonding layer 152 combined with the metal conductor 141, and the fifth bonding layer 153 is provided on the third film 151 upper surface , and the second conductor 161 of the second circuit layer 16 is bonded to the third film 151 through the fifth bonding layer 153, and the lower surface of the fourth film 171 of the fourth insulating layer 17 is provided with a sixth bonding layer 172 to form another covering film, and the fourth film 171 is combined with the second conductor 161 through the sixth bonding layer 172 to form a flexible multi-layer board.

Furthermore, the first bonding layer 112 of the first insulating layer 11 , the second bonding layer 132 and the third bonding layer 133 of the second insulating layer 13 , the fourth bonding layer 152 and the fifth bonding layer of the third insulating layer 15 153. The sixth bonding layer 172 of the fourth insulating layer 17 is made of epoxy resin (Epoxy), polyester resin (Polyester), acrylic resin (Acrylic) or other thermosetting adhesives, and the first circuit layer 12 The first conductor 121 of the second circuit layer 16 and the second conductor 161 of the second circuit layer 16 can be made of materials such as rolled copper foil or electrolytic copper foil, and the required circuit is formed by etching and other processes, and the ground layer 14 is set Between the first circuit layer 12 and the second circuit layer 16, and the metal conductor 141 of the ground layer 14 can be made of metal materials such as copper, aluminum or silver, preferably copper foil, the ground layer 14 can be used as an adjacent A common reference plane or ground plane (0V reference voltage, Ground plane) for two-channel signal transmission on the upper and lower first circuit layer 12 and second circuit layer 16 .

In this embodiment, the dual-channel flexible circuit board 10 includes the first insulating layer 11, the first circuit layer 12, the second insulating layer 13, the ground layer 14, the third insulating layer 15, the second circuit layer 16 and the fourth The insulating layer 17 can also have a first flexible substrate 101, a second flexible substrate 102 and a third flexible substrate 103, and the first flexible substrate 101 is made of the first thin film 111 of the first insulating layer 11, the first bonding layer Layer 112 and the first conductor 121 of the first circuit layer 12 form an adhesive flexible copper foil substrate (3Layer FCCL), and the required circuit is formed through etching and other processes. Similarly, the second flexible substrate 102 is composed of the second thin film 131 of the second insulating layer 13, the third bonding layer 133 and the metal conductor 141 of the grounding layer 14 to form an adhesive flexible copper foil substrate, and the third flexible substrate 103 is made of a fourth insulating layer. The fourth film 171 of the layer 17, the sixth bonding layer 172 and the second conductor 161 of the second circuit layer 16 form an adhesive flexible copper foil substrate, and the dual-channel flexible circuit board 10 or the first flexible The total thickness of the substrate 101, the second flexible substrate 102 and the third flexible substrate 103 can be between 0.2-0.6 mm, and two groups are respectively arranged on the two sides of the dual-channel flexible circuit board 10. There are a plurality of via holes 18, and each via hole 18 is electrically connected to the first circuit layer 12, the ground layer 14, and the second circuit layer 16, so as to realize interlayer interconnection of the multilayer structure.

The first connection interface 20 includes at least two first bridges 21 with first sockets 211, and the first terminal group 212 is pierced on the two side walls of the inner sockets 211 of the two first sockets 211. There are a plurality of docking parts 2121 opposite to each other, and the other side of each docking part 2121 relative to the upper opening of the insertion groove 2111 is respectively provided with a welding part 2122 penetrating downwards at the bottom of the first socket 211 to form a dislocation arrangement, to form a group The first bridge 21 of plug-in board type or dual in-line package (dual in-linepackage, DIP) type, and the place below the first socket 211 of the first bridge 21 is respectively provided with a plurality of rectangular first sockets 221. The reinforcing plate 22 is arranged so that the insertion holes 221 correspond to the welding portions 2122 below the first terminal group 212 , and an adhesive layer 222 is provided on one side surface of the first reinforcing plate 22 (as shown in FIG. 4 ).

The second connection interface 30 includes at least two second bridges 31 with second sockets 311, and the second terminal group 312 is pierced on the two side walls of the inner sockets 3111 of the two second sockets 311. There are a plurality of docking parts 3121 opposite to each other, and the other side of each docking part 3121 relative to the upper opening of the insertion groove 3111 is respectively provided with a welding part 3122 penetrating downwards at the bottom of the second socket 311 to form a dislocation arrangement, to form a group The second bridge 31 of plug-in board type or dual in-line package (dual in-linepackage, DIP) type, and the place below the second socket 311 of the second bridge 31 is respectively provided with a plurality of rectangular second sockets 321. The reinforcing plate 32 is arranged so that the insertion holes 321 correspond to the welding portions 3122 below the second terminal group 312 , and an adhesive layer 322 is provided on one side surface of the second reinforcing plate 32 (as shown in FIG. 4 ).

However, the first reinforcing plate 22 of the first connecting interface 20 and the second reinforcing plate 32 of the second connecting interface 30 can be made of glass fiber board, steel sheet, polypropylene (PP), polyparaphenylene (PP) of the flame-resistant material grade system FR4, respectively. It is made of ethylene glycol diformate (PET), ceramics and other metal or non-metal (such as inorganic or organic insulating materials, etc.) materials, preferably FR4 glass fiber board, and the first reinforcement board 22 and the second reinforcement board 32 The thickness can be between 0.4-1.0 mm, and the glued layers 222, 322 coated or pasted on the surface of the first reinforcement board 22 and the second reinforcement board 32 can be double-sided adhesive paper, hot melt adhesive respectively. , epoxy resin, polyester resin, acrylic resin and other adhesive paper or pressure-sensitive adhesive, preferably double-sided adhesive paper, and the thickness of the glued layer 222, 322 depends on the first reinforcing plate 22 and the second reinforcing plate 32. The selected material can be between 0.005mm and 0.20mm, preferably 50μm.

When the utility model is assembled, the dual-channel flexible circuit board 10 body that has completed the process (such as inner layer production, copper foil etching forming circuit, pressing, drilling and electroplating to form metallized holes, etc.) is punched out first. Specific appearance and required length, then the first bridge 21 of the first connection interface 20 and the second bridge 31 of the second connection interface 30 are respectively arranged on two sides of the front side of the dual-channel flexible circuit board 10. The soldering portion 2122 of the first terminal group 212 and the soldering portion 3122 of the second terminal group 312 will respectively vertically penetrate downwards into the corresponding via holes 18 on both sides of the dual-channel flexible circuit board 10, and make the plurality of first sockets 211 and the bottom of the second socket 311 respectively abut against the front of the dual-channel flexible circuit board 10 to form a distance between the front and rear and opposite to each other on the left and right. Sexual connection, and can effectively prevent the first terminal group 212, the second terminal group 312 and the solder structure on the dual-channel flexible circuit board 10 from being damaged or peeled off, so that the overall structure is more stable.

Continue to remove the flux used on the soldering part of the via hole 18 of the dual-channel flexible circuit board 10, and carry out the process on the other side surface of the dual-channel flexible circuit board 10 relative to the first bridge 21 and the second bridge 31 Glue, or tear off the release film attached to the first reinforcing plate 22 and the second reinforcing plate 32 on the glued layers 222, 322, and the first terminal group 212 and the second terminal group 312 pass through the dual-channel flexible The soldering parts 2122, 3122 on the back of the circuit board 10 are respectively inserted into the corresponding sockets 221, 321, and then the first reinforcement board 22 and the second reinforcement board 32 are pressed down respectively, and the glued layers 222, 322 can be combined respectively. On the back of the two ends of the dual-channel flexible circuit board 10, a long side of the first reinforcing plate 22 and a second reinforcing plate 32 are aligned with a short side of the dual-channel flexible circuit board 10, and the first reinforcing plate 22 The two short sides of the second reinforcement board 32 are respectively attached to the two long sides of the dual-channel flexible circuit board 10, so that the ends of the first reinforcement board 22 and the two short sides of the second reinforcement board 32 extend out of the first bridging bridge respectively. The outer side of the device 21 and the second bridge 31 forms a height difference shape, and the multiple insertion holes 221, 321 of the first reinforcing plate 22 and the second reinforcing plate 32 have a diameter larger than that of the first terminal group 212 and the second terminal group. The cross-sectional dimensions of the multiple welded parts 2122, 3122 of 312, if the first reinforcing plate 22 and the second reinforcing plate 32 are a steel sheet in this embodiment, the welded parts 2122, 3122 will not contact the sockets 221, 321, Short circuit or poor electrical connection can be avoided, and the pressure-sensitive adhesive used in the adhesive layer 222, 322 can also penetrate into the socket 221, 321 to improve the bonding strength, so that the first reinforcing plate 22 and the second The reinforcing plate 32 can be strengthened and pressed on the back of the dual-channel flexible circuit board 10 so as not to generate air bubbles, so as to ensure the bonding characteristics between them, and the overall assembly of the utility model can be completed.

As shown in FIG. 5 , the difference between the dual-channel flexible circuit board 10 in this embodiment and the above-mentioned embodiments is that the first bonding layer may not be used between the first film 111 and the first conductor 121 of the first flexible substrate 101 . Layer 112, and the first conductor 121 of the first circuit layer 12 can be directly fabricated on the first film 111 according to different manufacturing processes to form an adhesive-free flexible copper foil substrate (2Layer FCCL), and then formed by etching and other processes. required circuit, but in actual application, it is not limited to this, the third bonding layer 133 provided between the second thin film 131 of the second flexible substrate 102 and the metal conductor 141, and the third flexible substrate 103 The sixth bonding layer 172 provided between the fourth film 171 and the second conductor 161 can also be omitted, and the metal conductor 141 and the second conductor 161 can also be directly fabricated on the second film 131 and the fourth conductor 161 according to different manufacturing processes. The adhesive-free flexible copper foil substrate is formed on the film 171, and the main difference between the adhesive-free flexible copper foil substrate and the adhesive-based flexible copper foil substrate lies in the first flexible substrate 101 and the second flexible substrate 102. There is no adhesive layer between the inner film and the copper foil of the third flexible substrate 103, which can avoid problems such as internal stress and metal thinning in the adhesive layer, and has the advantages of good bending resistance and good dimensional stability, and In the case of reducing the number of layers, the total thickness of the overall structure can be reduced, but the manufacturing process (such as coating method, pressing method, sputtering/plating method, etc.) Adhesive flexible copper foil substrates are formed by laminating thin films and copper foils through adhesive layers. Compared with non-adhesive flexible copper foil substrates, they have the advantage of lower cost, but are more suitable for thicker copper layers. Different manufacturing methods can be adopted according to the required thickness and flexural resistance of the dual-channel flexible circuit board 10 , so they will be explained together in the following description of this case and will be presented together.

Please refer to Fig. 6, Fig. 7 and Fig. 8, which are respectively the three-dimensional appearance view of another preferred embodiment of the present invention before connection, the three-dimensional appearance view after connection and the three-dimensional appearance view of another preferred embodiment , it can be clearly seen from the figure that the reinforcing plate of the present invention is placed on the bridging line on the back of the dual-channel flexible circuit. etc., the system host 40 includes a motherboard 41, and is provided with a plurality of PCI-E (Express Peripheral Component Interconnect Standard, PCI Express, also referred to as PCIe) slots 411 arranged side by side on the motherboard 41, and at least The PCI-E transmission interface 421 corresponding to the graphics card (Graphics Card) 42 is respectively plugged into the two PCI-E slots 411, and the graphics card 42 surface is provided with a chipset that can be a graphics processor (GPU). 420, the display card 42 in this embodiment can support SLI technology, and two bridging end connectors 422 are respectively provided at the top edge of each display card 42 near the side, and each bridging end connector 422 is left and right. There are a plurality of metal contacts 4221 on the surfaces of the two sides, so that the display card 42 cooperates with the motherboard 41 to perform functions such as 3D image calculation and graphics acceleration.

When the reinforcing plate of the present utility model is placed on the bridge line on the back of the dual-channel flexible circuit to connect the two display cards 42 on the mainboard 41, the dual-channel flexible circuit board 10 in Fig. The eighty-degree opposite direction indicates that the first connection interface 20 corresponds to the display card 42, and the first bridges 21 can be respectively downwardly connected to the corresponding bridging end connectors 422 on the first display card 42, and use The first reinforcing plate 22 increases the structural strength of the end of the dual-channel flexible circuit board 10 corresponding to the position of the first bridge 21, so that the user is not easy to break the circuit or the first bridge 21 due to excessive bending by pulling or pressing down. The destruction of the welding structure allows the bridging end connector 422 to be inserted into the insertion groove 2111 of the first socket 211 smoothly, and the opposite butt joint portion 2121 of the first terminal group 212 is in contact with the corresponding plurality of metals on the bridging end connector 422 The contact 4221 forms a definite electrical connection. Similarly, the second socket 311 of the second bridge 31 can be connected to the bridging end connector 422 of the second display card 42 in the above-mentioned manner, and the second reinforcing plate 32 can be used to increase the The structural strength of the other end of the dual-channel flexible circuit board 10 corresponding to the position of the second bridge 31 allows the user to avoid circuit breakage or welding of the second bridge 31 due to excessive bending caused by pulling or pressing down. to ensure the stability and effect of high-frequency signal transmission, and after the butt joint portion 2121 of the second terminal group 312 is in contact with the corresponding plurality of metal contacts 4221 on the bridging terminal joint 422 to form an electrical connection, it can be The first connection interface 20 and the second connection interface 30 with two first bridges 21 and second bridges 31 on both sides of the dual-channel flexible circuit board 10 are connected to the four bridge ends of the two display cards 42 Connector 422, so as to realize connecting two display cards 42 to form a dual-channel bridging state, so that the system host 40 can use the chip set 420 on the two display cards 42 to perform parallel calculations, thereby improving the faster calculation processing and graphics of the dual-graphics system performance shown.

In this embodiment, when the dual-channel flexible circuit board 10 utilizes four pairs of first bridges 21 and second bridges 31 of the first connection interface 20 and the second connection interface 30 to connect two display cards 42 to form any In the bridging state, the first line layer 12 and the second line layer 16 can provide dual-channel high-frequency signal transmission, and the ground layer 14 between the first line layer 12 and the second line layer 16 is used as the common ground for high-frequency signal transmission. Reference plane, match the impedance of the first circuit layer 12, the second circuit layer 16 and the ground layer 14 to meet the requirement that the characteristic impedance is 50 ohms (Ω), and reduce the skin generated during the reflection and transmission of high-frequency signals At the same time, the ground layer 14 makes the first line layer 12 and the second line layer 16 form a shielding and isolation effect, so that the distance between the line layer and the reference plane is close to reduce the corresponding generation of high-frequency signal transmission. Electromagnetic waves and crosstalk interference, this dual-channel flexible circuit board 10-layer structure design, compared with the traditional single-channel flexible board bridge wiring, the working bandwidth is only 400MHz or the traditional dual-channel hard board bridge is only 680MHz cannot meet the demand for increased working bandwidth, and with the increase of signal transmission channels and working bandwidth, there are still problems such as thickening and insufficient flexibility. The dual-channel flexible circuit board 10 of the present invention can not only meet The working bandwidth needs to be increased to 1360MHz, and the total thickness is between 0.2-0.6mm to achieve thinner profile and higher flex resistance. For the integrity of high-frequency signal transmission, it can still meet the characteristic impedance The test requirement is 50 ohms (Ω), so as to achieve stable dual-channel high-frequency signal transmission and the effect of improving transmission efficiency.

In addition, the dual-channel flexible circuit board 10 used in the present invention has light weight, higher flex resistance and thinner characteristics, and the dual-channel flexible circuit board 10 can be bent to form upward arching and drooping according to actual needs. Or fold to form an acute angle setting, and multiple flexing will not cause damage or breakage of the structure of the double-channel hard board bridge, etc., so that the first connection interface 20 and the second connection interface 30 can be divided into four pairs The first bridge 21 and the second bridge 31 connect all the two display cards 42 with different spacings, so as to be applicable to the different design schemes of motherboards 41 or display cards 42 of different specifications manufactured by various manufacturers, and will not be subject to different designs. The bridging distance or plug-in space is limited to meet the user's self-upgrading and expansion needs.

When the user wants to pull out the first bridge 21 and the second bridge 31 of the first connection interface 20 and the second connection interface 30, the two ends of the first reinforcement plate 22 and the second reinforcement plate 32 can be used to Extending the first bridge 21 and the second bridge 31 form a height difference shape, so that the user's fingers can stably hook the end of the first reinforcement plate 22 or the second reinforcement plate 32 without loosening or slipping, and upward Pull up the joint to disengage the first bridge 21 or the second bridge 31 from the bridge end joint 422 of the display card 42, so that the user can perform plugging and unplugging operations conveniently, so as to improve the inconvenience of plugging and unplugging. The bridging wire of the utility model is reused, so that the function and effect of the overall use can be improved.

As shown in FIG. 8 , the difference between the system mainframe 40 in this embodiment and the above-mentioned embodiments is that its display card 42 further includes a heat dissipation device 43, and the heat dissipation device 43 has a heat dissipation device that is attached to the surface of the chipset 420. module (such as multiple heat sinks of heat sink or heat sink, etc.), and a fan is installed on the heat dissipation module, and a plurality of heat pipes can be further pierced on the heat dissipation module, so that the power cord of the fan can be connected to the display card 42 to provide The electric power enables the fan to run to cooperate with the heat dissipation module to assist the chipset 420 to dissipate heat quickly.

Because the display card 42 of the dual-graphics card system generally can install a cooling device 43 on the display card 42 in order to achieve the purpose of rapid heat dissipation, so the size of the display card 42 in the width direction will increase, and make any two adjacent PCI- In the E slot 411, the display cards 42 cannot be inserted respectively, so two PCI-E slots 411 need to be vacated between the two display cards 42 to form a structure spanning four PCI-E slots 411, and then the The dual-channel flexible circuit board 10 can be connected between two display cards 42 by using four pairs of first bridges 21 and second bridges 31 in total between the first connection interface 20 and the second connection interface 30. The main board 41 and the display card 42 of different specifications can avoid the trouble of increasing the cost of use and inconvenient storage when not in use due to the difference in the distance between the two display cards 42 and the need to install a dual-channel hard board bridge of different specifications. More practical and applicable effects.

Therefore, the utility model is mainly aimed at the two sides of the front of the dual-channel flexible circuit board 10 being electrically connected with the first connection interface 20 and the second connection interface 30, and the first connection interface 20 includes a first socket 211 and a second connection interface. The first bridge 21 and the first reinforcing plate 22 of a terminal group 212, the second connection interface 30 includes the second bridge 31 and the second reinforcing plate 32 with the second socket 311 and the second terminal group 312, so that the The first reinforcing plate 22 and the second reinforcing plate 32 are respectively combined on the back of the two ends of the dual-channel flexible circuit board 10 in a press-fitting manner to increase its structural strength, allowing the user to connect the first bridge 21 and the second bridge 31 They are respectively connected to the bridging end connectors 422 of the two display cards 42, so that the circuit breakage or the damage to the welding structure of the bridge is not easy to be caused by excessive bending due to pulling or pressing down, so that the plugging and unplugging actions can be easily performed to meet the needs of users. Or the convenience of plugging and unplugging.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (6)

1. a kind of reinforcing plate is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：Include binary channels flexible electrical Road plate and it is relatively arranged on the first connecting interface being electrically connected at positive two sides of binary channels flexible PCB and the second company Interface is connect, wherein：

The binary channels flexible PCB is sequentially comprising the first insulating layer, first line layer, the second insulating layer, ground plane, the 3rd exhausted Edge layer, the second line layer and the 4th insulating layer；

First connecting interface includes at least two the first bridges with the first socket and first adding with plural number jack Strong plate, and inserting groove is all equipped with the plural docking section at first end subgroup side inside the first socket, and each docking section is set Have and be pierced by the weld part that the first socket back portion is electrically connected with first line layer, ground plane, the second line layer respectively, and the One reinforcing plate is incorporated on the one end back side of binary channels flexible PCB, and first end subgroup is pierced by binary channels flexible PCB The weld part at the back side is inserted into corresponding jack respectively；

Second connecting interface includes at least two the second bridges with the second socket and second adding with plural number jack Strong plate, and inserting groove is all equipped with the plural docking section at second end subgroup side, and each butted part inside the second socket It She You not be pierced by the weld part that the second socket bottom and first line layer, ground plane, the second line layer are electrically connected, and the Two reinforcing plates are incorporated on the back side of binary channels flexible PCB the other end, and second end subgroup is pierced by binary channels flexible PCB The weld part at the back side is inserted into corresponding jack respectively.

2. reinforcing plate according to claim 1 is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：This The jack aperture of one reinforcing plate and the second reinforcing plate is respectively greater than the weld part of first end subgroup, the weld part of second end subgroup breaks Face size, so that weld part will not be with the jack contact of the first reinforcing plate, the second reinforcing plate.

3. reinforcing plate according to claim 1 is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：This One reinforcing plate and the second reinforcing plate are rectangular, and are pasted by a long side of first reinforcing plate and the second reinforcing plate together in binary channels One short side of flexible PCB, and two short sides of first reinforcing plate and the second reinforcing plate then paste together in binary channels flexible electrical respectively Two long sides of road plate, and the first reinforcing plate and the end of two short sides of the second reinforcing plate each extend over out the first bridge and second A height segment difference shape is formed at bridge outer side edges.

4. reinforcing plate according to claim 1 is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：This One reinforcing plate and the second reinforcing plate are respectively the glass mat of flame resistant material grade FR4, steel disc, polypropylene, poly- terephthaldehyde Made by sour glycol ester or ceramic material, and the thickness of the first reinforcing plate and the second reinforcing plate is between 0.4~1.0mm.

5. reinforcing plate according to claim 1 is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：This One reinforcing plate, one side surface is equipped with cementing layer, and is incorporated into binary channels flexible PCB by the cementing layer by the first reinforcing plate The one end back side on, and one side surface of the second reinforcing plate is equipped with another cementing layer, and the second reinforcing plate passes through another glue Layer is closed to be incorporated on the back side of binary channels flexible PCB the other end.

6. reinforcing plate according to claim 5 is placed in the bridging line at the binary channels flexible circuit back side, it is characterised in that：The glue Conjunction layer is Double-face gummed paper, hot melt adhesive, epoxy resin, polyester resin or acryl resin, and the thickness of cementing layer between 0.005~ Between 0.20mm.