An integrated circuit composite circuit board

Abstract

This invention discloses an integrated circuit composite circuit board, belonging to the field of circuit board technology. It includes a composite circuit board body comprising a rigid circuit board, a flexible circuit board, and embedded tensioning components. The rigid and flexible circuit boards are connected by a connecting pressing component. The rigid circuit board has an installation port for mounting the flexible circuit board. The connecting pressing component is disposed on the side walls of the installation port, achieving conductive connection between the flexible and rigid circuit boards. This invention compensates for the strength loss of the rigid circuit board at the installation port by pre-embedded tensioning components, disperses stress concentration, and significantly reduces the risk of breakage due to stress in the slotted area. The rigid circuit board adopts a layered structure of a lower substrate, an embedded circuit layer, and an upper circuit layer. Combined with the integration of the embedded tensioning component, it improves overall mechanical stability, solves the strength defects and connection life problems of traditional rigid-flexible composite circuit boards, and simultaneously improves signal transmission performance and assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of circuit board technology, and more particularly to an integrated circuit composite circuit board. Background Technology

[0002] Rigid-flex circuit boards are a type of composite circuit board. They are hybrid circuit boards that combine rigid and flexible circuit boards through a special process. They combine the stability of rigid circuit boards with the flexibility of flexible circuit boards and are widely used in electronic devices with high requirements for space, weight and reliability.

[0003] Installing a flexible printed circuit board (FPC) within a rigid printed circuit board (PCB) is a hybrid design typically used in scenarios requiring localized bending, dynamic movement, or space optimization.

[0004] The installation methods include the following: Embedded installation: a slot or hollow area is cut out on the rigid PCB, and the FPC is embedded in it and fixed by soldering or conductive adhesive; Stacked installation: the FPC and rigid PCB are stacked in layers and interconnected by connectors (such as board-to-board BTB) or flexible cables; Surface mount: the FPC is directly attached to the surface of the rigid PCB and connected by hot bar welding or ACF (anisotropic conductive film). In summary, all of the above solutions require slots to be cut on the rigid PCB before the flexible PCB is installed. In this installation method, the strength of the wiring at both ends of the flexible PCB is limited by the process. Insufficient connection strength will affect the wiring life of the subsequent flexible circuit board. Moreover, because the rigid circuit board is hollowed out and slotted, its strength is reduced, and the circuit board is very likely to break due to the stress of the flexible circuit board at the slotted and hollowed-out area. Based on this, an integrated circuit composite circuit board is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that the existing technology requires slots to be cut into rigid circuit boards before installing flexible circuit boards. In this installation method, the strength of the wiring at both ends of the flexible circuit board is limited by the process, and insufficient connection strength will affect the wiring life of the subsequent flexible circuit board. Furthermore, because the rigid circuit board is hollowed out and slotted, its strength is reduced, and the circuit board is very likely to break at the slotted and hollowed-out area due to the stress on the flexible circuit board. Therefore, an integrated circuit composite circuit board is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated circuit composite circuit board includes a composite circuit board body, which includes a rigid circuit board, a flexible circuit board, and an embedded pull-out member. The rigid circuit board and the flexible circuit board are connected by a connecting pressing member. The rigid circuit board has an installation port for mounting the flexible circuit board. The connecting pressing member is disposed on the side walls on both sides of the installation port to realize the conductive connection between the flexible circuit board and the rigid circuit board.

[0008] The rigid circuit board includes a lower substrate, a circuit embedding layer, and an upper circuit layer;

[0009] The flexible circuit board includes a flexible extension section and gold finger layers disposed at both ends of the flexible extension section;

[0010] The embedded buffer component includes limiting end strips located on both sides and two buffer sheet layers disposed on both sides of the limiting end strips;

[0011] The connecting and pressing components include embedded connectors that are pressed and connected to rigid circuit boards and connecting assemblies that are connected to the gold finger layer.

[0012] As a preferred embodiment, the connection assembly includes a terminal block and a pressing contact block. The terminal block has a wiring contact groove that is adapted to the gold finger layer. The pressing contact block is connected to the pull-out sheet layer through force-bearing connectors located on both sides.

[0013] As a preferred embodiment, the embedded connector includes a conductor embedded in a rigid circuit board, one end of which is provided with an L-shaped conductor plate, and the other end of which is fixedly connected to a terminal block.

[0014] As a preferred embodiment, the force-bearing connector includes a plug rod disposed at the bottom of the press-fit contact seat, and an inclined pressure sleeve is fixedly connected to the outer wall of the plug rod.

[0015] As a preferred embodiment, the terminal block is provided with combination side openings on both sides for installing the pull-out sheet layer. The side wall of the combination side opening is provided with a plug-in slot for assembling the plug-in rod. A locking member is provided in the plug-in slot and moved by the inclined pressure sleeve. The pull-out sheet layer is provided with a locking port adapted to the locking member.

[0016] As a preferred embodiment, both ends of the buried line layer and the upper line layer are provided with end slots for installing the limiting end strips.

[0017] As a preferred embodiment, the lower substrate has a wire groove, and the wire body is located in the wire groove and is electrically connected to the wiring layer.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This invention compensates for the strength loss of rigid circuit boards at the mounting opening by pre-embedded buffer components (limiting end strips and buffer sheet layers), disperses stress concentration, and significantly reduces the risk of breakage in the slotted area due to stress. The rigid circuit board adopts a layered structure of lower substrate, circuit embedding layer and upper circuit layer. Combined with the integration of the buffer components, the overall mechanical stability is improved.

[0020] 2. Through structural innovation and process optimization, this invention solves the strength defects and connection life problems of traditional rigid-flex circuit boards, while improving signal transmission performance and assembly efficiency. It is suitable for electronic devices with high requirements for reliability, space utilization and high frequency performance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an integrated circuit composite circuit board proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the assembly structure of an integrated circuit composite circuit board proposed in this invention. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the assembly structure of the connecting pressing component in an integrated circuit composite circuit board according to the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly structure of an integrated circuit composite circuit board proposed in this invention. Figure 2 ;

[0025] Figure 5 This is a schematic diagram of the assembly structure of an integrated circuit composite circuit board proposed in this invention. Figure 3 ;

[0026] Figure 6 This is a schematic diagram of the connection structure between the connecting press-fit component and the flexible circuit board in an integrated circuit composite circuit board according to the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of a stress-bearing connector in an integrated circuit composite circuit board proposed in this invention;

[0028] Figure 8 This is a schematic diagram of a structure for embedding a pull-out component in an integrated circuit composite circuit board according to the present invention.

[0029] In the diagram: 1. Rigid circuit board; 101. Lower substrate; 102. Embedded circuit layer; 103. Upper circuit layer; 2. Flexible circuit board; 201. Flexible extension section; 202. Gold finger layer; 3. Embedded pull-out component; 301. Limiting end strip; 302. Pull-out sheet layer; 4. Mounting port; 5. Terminal block; 6. Press-fit contact block; 7. Wiring contact groove; 8. Conductor body; 9. L-shaped conductor board; 10. Connecting rod; 11. Angled pressure sleeve; 12. Combined side opening; 13. Connecting slot; 14. Locking component; 15. End groove; 16. Conductor groove. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example, refer to Figures 1 to 8 An integrated circuit composite circuit board includes a composite circuit board body, which includes a rigid circuit board 1, a flexible circuit board 2, and an embedded pull-out member 3. The rigid circuit board 1 and the flexible circuit board 2 are connected by a connecting pressing member. The rigid circuit board 1 has an installation port 4 for installing the flexible circuit board 2. The connecting pressing member is disposed on the side walls on both sides of the installation port 4 to realize the conductive connection between the flexible circuit board 2 and the rigid circuit board 1.

[0034] The rigid circuit board 1 includes a lower substrate 101, a circuit embedding layer 102 and an upper circuit layer 103. The connection method between the flexible circuit board 2 and the rigid circuit board 1 is suitable for multiple scenarios (such as dynamic bending or compact space layout of wearable devices), combining flexibility and reliability.

[0035] Furthermore, both ends of the buried line layer 102 and the upper line layer 103 are provided with end slots 15 for the installation of limit end strips (301).

[0036] The flexible circuit board 2 includes a flexible extension section 201 and gold finger layers 202 disposed at both ends of the flexible extension section 201;

[0037] The embedded pull-out component 3 includes limiting end strips 301 located on both sides and two pull-out sheet layers 302 disposed on both sides of the limiting end strips 301;

[0038] The connecting pressing components include embedded connectors that are pressed and connected to the rigid circuit board 1 and connecting assemblies that are connected to the gold finger layer 202. The FPC design inserts the gold fingers into the slots of the rigid PCB, which is suitable for high-frequency signal transmission. The gold fingers of the flexible circuit board 2 are directly inserted into the slots (connection contact slots 7) of the rigid circuit board 1, which shortens the signal transmission path and reduces impedance discontinuities, making it suitable for high-fidelity transmission of high-frequency signals. The layout design of the embedded connectors (such as L-shaped conductor boards 9) and conductor slots 16 reduces signal interference and improves the overall signal integrity of the circuit.

[0039] Furthermore, the connection assembly includes a terminal block 5 and a pressing contact 6. The terminal block 5 has a wiring contact groove 7, which is adapted to the gold finger layer 202. The pressing contact 6 is connected to the pull-out sheet layer 302 through force-bearing connectors located on both sides.

[0040] The force-bearing connecting component includes a plug rod 10 disposed at the bottom of the pressing contact seat 6, and an inclined pressure sleeve 11 is fixedly connected to the outer side wall of the plug rod 10;

[0041] Furthermore, the terminal block 5 is provided with combination side openings 12 for installing the pull plate layer 302 on both sides. The side wall of the combination side opening 12 is provided with a plug slot 13 for assembling the plug rod 10. A locking member 14 is provided in the plug slot 13 and is moved by the inclined pressure sleeve 11. The pull plate layer 302 is provided with a locking port that matches the locking member 14.

[0042] The embedded connector includes a conductor 8 embedded in a rigid circuit board 1. One end of the conductor 8 is provided with an L-shaped conductor plate 9, and the other end of the L-shaped conductor plate 9 is fixedly connected to a terminal block 5. The lower substrate 101 has a conductor groove 16, and the conductor 8 is located in the conductor groove 16 and is electrically connected to the embedded circuit layer 102.

[0043] Before the rigid circuit board 1 is pressed, the present invention embeds the embedded tension member 3 between the circuit embedding layer 102 and the upper circuit layer 103. After pressing, the limiting end strip 301 at the end of the embedded tension member 3 will firmly connect the embedded tension member 3 to the rigid circuit board 1, thereby compensating for the strength of the rigid circuit board 1 after the window is opened at the mounting opening 4.

[0044] When installing the flexible circuit board 2, the gold finger layer 202 of the flexible circuit board 2 is installed in the terminal contact groove 7 on the terminal block 5. Then, the embedded pull-out member 3 is installed in the combination side opening 12 on both sides of the terminal block 5, so that the locking port on the embedded pull-out member 3 corresponds with the locking member 14. Then, the pressing contact 6 is moved downward to combine with the terminal block 5 to realize the combination connection between the flexible circuit board 2, the rigid circuit board 1 and the embedded pull-out member 3. After the connection is completed, the connection is cured with high temperature resistant epoxy glue or UV curing glue. Through the cooperation of the plug rod 10, the inclined pressure sleeve 11 and the locking member 14, the gold finger of the flexible circuit board 2 and the rigid circuit board 1 are locked in a rigid slot, which enhances the physical connection strength of the interface and reduces contact fatigue caused by dynamic bending or vibration. The secondary curing with high temperature resistant epoxy glue or UV curing glue further ensures the long-term stability of the connection, which is suitable for high vibration or temperature difference environment.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated circuit composite wiring board comprising a composite wiring board main body, characterized by, The composite circuit board body comprises a rigid circuit board (1), a flexible circuit board (2) and a buried slow-pulling piece (3), the rigid circuit board (1) and the flexible circuit board (2) are combined and connected through a connecting compression piece, the rigid circuit board (1) is provided with a mounting port (4) for mounting the flexible circuit board (2), and the connecting compression piece is arranged on the sidewall of the mounting port (4), so that the flexible circuit board (2) and the rigid circuit board (1) are connected in conduction; The rigid circuit board (1) comprises a lower layer substrate (101), a circuit buried layer (102) and an upper layer circuit layer (103); The flexible circuit board (2) comprises a flexible extension section (201) and a gold finger layer (202) arranged at both ends of the flexible extension section (201); The buried slow-pulling piece (3) comprises limiting end strips (301) arranged at both sides and two slow-pulling piece layers (302) arranged at both sides of the limiting end strips (301); The connecting compression piece comprises a buried connecting piece for compression connection with the rigid circuit board (1) and a connecting combination piece for connection with the gold finger layer (202); The connecting combination piece comprises a terminal seat (5) and a compression contact seat (6), the terminal seat (5) is provided with a terminal contact groove (7), the terminal contact groove (7) is matched with the gold finger layer (202), the compression contact seat (6) is connected with the slow-pulling piece layer (302) through stress connecting pieces arranged at both sides, and the slow-pulling piece layer (302) is partially arranged in the terminal seat (5); The circuit buried layer (102) and the upper layer circuit layer (103) are both provided with end grooves (15) for mounting the limiting end strips (301).

2. The integrated circuit composite wiring board according to claim 1, wherein The buried connecting piece comprises a wire body (8) buried in the rigid circuit board (1), one end of the wire body (8) is provided with an L-shaped wire plate (9), and the other end of the L-shaped wire plate (9) is fixedly connected with the terminal seat (5).

3. The integrated circuit composite wiring board according to claim 2, wherein The stress connecting piece comprises an insertion rod (10) arranged at the bottom of the compression contact seat (6), and the outer sidewall of the insertion rod (10) is fixedly connected with an inclined surface compression sleeve (11).

4. The IC composite wiring board according to claim 3, wherein The terminal seat (5) is provided with combination side ports (12) for mounting the slow-pulling piece layer (302) at both sides, the combination side port (12) is provided with an insertion groove (13) for combination of the insertion rod (10), the insertion groove (13) is provided with a lock compression piece (14) for movement of the inclined surface compression sleeve (11), and the slow-pulling piece layer (302) is provided with a lock compression port matched with the lock compression piece (14).

5. The IC composite wiring board according to claim 4, wherein The lower layer substrate (101) is provided with a wire groove (16), and the wire body (8) is arranged in the wire groove (16) and electrically connected with the circuit buried layer (102).

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