Flexible circuit board with same-end separation structure

Abstract

The utility model provides a flexible circuit board with a same-end separation structure, which is characterized in that a mainboard is provided with an upper-layer circuit and a lower-layer circuit, and more than two branch circuit layers are arranged between the upper-layer circuit and the lower-layer circuit; bonding pads are arranged on an upper-layer circuit and a lower-layer circuit of the mainboard; the branch circuit layers are electrically connected with each other through the via holes which are metalized through the via holes; the upper layer circuit and the adjacent branch circuit layer, the adjacent branch circuit layers, and the lower layer circuit and the adjacent branch circuit layer are connected through adhesive layers. Each branch circuit layer corresponds to one auxiliary board or sub-board or terminal, and each branch circuit layer can be bent and inserted into the auxiliary board or sub-board or terminal. According to the utility model, a plurality of branches are realized on the main circuit board through the laminated structure design, and the circuit layers of the branches are inserted into the auxiliary board or the daughter board or the terminal by utilizing the bendability of the flexible circuit board, so that the purpose that the main circuit controls the branch circuits is achieved.

Description

Technical Field

[0001] The utility model relates to a flexible circuit board structure, in particular to a flexible circuit board with a same-end separation structure. Background Art

[0002] In some electronic products, a main board or motherboard needs to control multiple sub-boards or daughter boards or terminals. It is often necessary to design multiple sockets on the main board or motherboard, and then connect them to the sub-boards or daughter boards or terminals through cables. This method of wiring is more troublesome and the appearance is more messy. If the flexibility, bendability or bending of the flexible circuit board is utilized to realize the integration of the main board and the cable as one, and then control the sub-boards or daughter boards or terminals in a branch way, the circuit board will be neater and clearer. Utility Model Content

[0003] The utility model provides a flexible circuit board with a same-end separation structure, which aims to solve the shortcomings of the prior art, realize multi-way branches on a main circuit board through a laminated structural design, and utilize the bendability of the flexible circuit board to plug the circuit layers of these branches into a sub-board or a daughter board or a terminal, so as to achieve the purpose of the main circuit controlling the branch circuit.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A flexible circuit board with a same-end separation structure, characterized in that:

[0006] The main board has an upper circuit and a lower circuit, and there are more than two branch circuit layers between the upper circuit and the lower circuit;

[0007] The upper and lower circuits of the motherboard have pads;

[0008] Electrical connection is achieved between each branch circuit layer through metallized vias;

[0009] The upper layer circuit and the adjacent branch circuit layer, the mutually adjacent branch circuit layers, and the lower layer circuit and the adjacent branch circuit layer are connected by a glue layer;

[0010] Each branch circuit layer corresponds to a sub-board or daughter board or terminal, and each branch circuit layer is connected to the sub-board or daughter board or terminal in a straight line or a curved manner.

[0011] The right end of the motherboard is connected to the external circuit.

[0012] The upper and lower circuits of the motherboard are mounted with components.

[0013] The utility model is beneficial in that:

[0014] The utility model, according to the circuit requirements, overlaps multiple branch circuit layers by lamination, each branch circuit layer corresponds to a sub-board or daughter board or terminal, each branch circuit layer can be bent and plugged into the sub-board or daughter board or terminal, and each circuit layer overlapped part is the main board, which can be mounted with various components and can also be connected to the outside through gold fingers and other methods. This flexible circuit board with a laminated integrated main board and branch circuits as one has clear layers, is neat and clear, and is not easy to connect wrongly, and is very suitable for the connection between the main board and multiple sub-boards or daughter boards or terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the plug-in of the utility model. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solution of the utility model, the following will briefly introduce the drawings required for the description. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work. In order to facilitate the understanding of the utility model, the following will be combined with the drawings and specific embodiments to explain the utility model in more detail.

[0019] like Figure 1 As shown:

[0020] 1. According to the number of sub-boards or daughter boards or terminals and the circuit and structure requirements, determine the number of layers of the main board A and the length and width of the branch circuit layer (that is, the length and width of branch circuit layer 1, branch circuit layer 3, branch circuit layer 5, branch circuit layer 7, and branch circuit layer 9);

[0021] 2. According to the length and width of the branch line layer and the requirements of the mainboard circuit, design the length and width of the mainboard, and carry out the wiring of the mainboard and branch lines, and design the positioning holes;

[0022] 3. The upper circuit and the adjacent branch circuit layer, the adjacent branch circuit layers, and the lower circuit and the adjacent branch circuit layer are connected with glue layers. According to the wiring requirements of the mainboard, the length of each branch circuit layer, and the bending part of the branch circuit, the length and width of each mainboard glue layer (that is, the length and width of glue layer 2, glue layer 4, glue layer 6, and glue layer 8) are designed, and positioning holes are designed at the same time;

[0023] 4. The upper and lower circuits of the mainboard are designed with various pads according to the circuit requirements, and windows are opened through the covering film. For example, windows are opened through the covering film 10 and the covering film 12 to expose the pads 11 and the pads 13, etc.; the upper and lower circuits are also mounted with components;

[0024] 5. The electrical connection between each branch circuit layer can be achieved by designing vias 14 and performing hole metallization to achieve electrical connection;

[0025] 6. Each branch circuit layer (i.e., branch circuit layer 1, branch circuit layer 3, branch circuit layer 5, branch circuit layer 7, branch circuit layer 9) needs to be made separately and then aligned with each layer of glue layer (i.e., glue layer 2, glue layer 4, glue layer 6, glue layer 8) through the positioning hole fixture, pressed and baked, then CNC drilled through the hole, and black hole copper plated to achieve hole metallization, and then the upper and lower outer layer circuits are made, the cover film (cover film 10 and cover film 12) after the window is opened is attached, and pressed and baked to obtain the required pads (pad 11 and pad 13) or gold finger 15 of the upper and lower layers;

[0026] like Figure 2 As shown:

[0027] Gold fingers are provided at the end of each branch circuit layer (i.e., branch circuit layer 1, branch circuit layer 3, branch circuit layer 5, branch circuit layer 7, and branch circuit layer 9), and the straight or curved lines correspond to the sockets B1, B2, B3, B4, B5, etc., which are connected to the auxiliary board, daughter board, or terminal B board.

[0028] 8. The right end of the motherboard A can be lengthened as needed to design more pads or gold fingers connected to external circuits;

[0029] 9. Depending on the number of sub-boards or daughter boards or terminal B, the number of layers can be increased.

Claims

1. A flexible circuit board with a same-end separation structure, characterized in that: The main board has an upper circuit and a lower circuit, and there are more than two branch circuit layers between the upper circuit and the lower circuit; The upper and lower circuits of the motherboard have pads; Electrical connection is achieved between each branch circuit layer through metallized vias; The upper layer circuit and the adjacent branch circuit layer, the mutually adjacent branch circuit layers, and the lower layer circuit and the adjacent branch circuit layer are connected by a glue layer; Each branch circuit layer corresponds to a sub-board or daughter board or terminal, and each branch circuit layer is connected to the sub-board or daughter board or terminal in a straight line or a curved manner.

2. A flexible circuit board with a same-end separation structure as claimed in claim 1, characterized in that: The right end of the motherboard is connected to the external circuit.

3. A flexible circuit board with a same-end separation structure as claimed in claim 1, characterized in that: The upper and lower circuits of the motherboard are mounted with components.

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