Two-layer flexible circuit board

Abstract

The utility model discloses a two-layer type flexible circuit board, which is characterized in that an upper layer and a lower layer of a three-layer type flexible circuit board in the prior art are fused into one layer, after a circuit is printed on a lower layer PET (polyethylene terephthalate) II, a jumper wire, an insulating UV (ultraviolet) and waterproof glue are sequentially printed, then an upper layer PET II is combined, and finally a rubber cap is adhered, so that the two-layer type flexible circuit board can be manufactured. Because the PAD point is designed to be claw-shaped, the conduction principle is that the conductive particles are arranged on the conduction column of the rubber cap, and the rubber cap is pressed to enable the conductive particles to be in contact with the claw-shaped PAD point, so that the left side and the right side of the claw-shaped PAD point are connected to form a loop, and the two-layer design effectively reduces the production process flow of the flexible circuit board and reduces the production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit boards, in particular to a two-layer flexible circuit board. Background Art

[0002] Flexible circuit boards are mainly used in home appliance buttons, computer buttons and various key function equipment. They realize electrical functions by printing conductive silver paste, insulating UV, carbon, etc. on PET.

[0003] like Figure 1 As shown, the flexible circuit board of the existing scheme mainly consists of an upper PET-1, an upper circuit 2, an upper insulating UV3, an upper jumper 4, an upper waterproof glue 5, a middle PET6, a lower waterproof glue 7, a lower jumper 8, a lower insulating UV9, a lower circuit 10, and a lower PET-11. Among them, the upper PET-1, the upper circuit 2, the upper insulating UV3, the upper jumper 4, and the upper waterproof glue 5 are combined to form an upper line, and the lower waterproof glue 7, the lower jumper 8, the lower insulating UV9, the lower circuit 10, and the lower PET-11 are combined to form a lower line; usually, the production process of the flexible circuit board is to perform conventional process combination on the upper line, and after the conventional process combination on the lower line, the output end 12 is protected by film, and finally the upper line, the middle PET6, and the lower line are combined to achieve the overall combination of the flexible circuit board.

[0004] The above-mentioned three-layer flexible circuit board of the existing process needs to print the upper circuit 2, the upper insulation UV3, the upper jumper 4 and the upper waterproof glue 5 on the upper PET-1 in sequence, and print the lower circuit 10, the lower insulation UV9, the lower jumper 8 and the lower waterproof glue 7 on the lower PET-11 in sequence, and then combine the upper and lower and lower lines with the middle PET6. Therefore, the overall production process is long and the production cost is high. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a two-layer flexible circuit board, including a rubber cap, an upper PET layer 2, a waterproof glue, an insulating UV, a jumper, a circuit and a lower PET layer 2 which are arranged in sequence;

[0006] Wherein, the PAD points of the line are claw-shaped and interlocked with each other;

[0007] The rubber cap comprises an inverted bowl-shaped cap body, a conducting column arranged axially inside the bowl-shaped cap body, and conductive particles arranged at the end of the conducting column.

[0008] Wherein, a protective film is attached to the output end of the circuit.

[0009] Wherein, a layer of exhaust groove is printed on the side of the waterproof glue corresponding to the upper PET layer 2.

[0010] The circuit, jumper, UV insulation and waterproof glue are printed on the upper surface of the lower layer PET 2 in sequence;

[0011] The second upper layer of PET is correspondingly attached to the upper surface of the second lower layer of PET printed with the circuit, jumper, UV insulation and waterproof glue;

[0012] The rubber cap is inverted and adhered to a corresponding position on the upper surface of the second upper PET layer.

[0013] Through the above technical scheme, the two-layer flexible circuit board of the utility model is manufactured by fusing the upper and lower layers of the three-layer flexible circuit board of the prior art into one layer, printing the circuit on the lower PET layer 2, then printing the jumper, insulating UV, and waterproof glue in sequence, and then combining the upper PET layer 2, and finally pasting the rubber cap to complete the production of the two-layer flexible circuit board; this two-layer design reduces the production process and reduces the production cost; in addition, since the PAD point is designed to be claw-shaped, its conduction principle is to install conductive particles on the conduction column of the rubber cap, and press the rubber cap to make the conductive particles contact the claw-shaped PAD point, so that the left and right sides are connected to form a loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a schematic diagram of the decomposed structure of a three-layer flexible circuit board in the prior art;

[0016] Figure 2 This is a schematic diagram of the exploded structure of the two-layer flexible circuit board of the utility model;

[0017] Figure 3 It is a schematic diagram of the PAD point structure of the circuit of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the rubber cap of the utility model.

[0019] The numbers in the figure represent: 1. Upper layer PET one; 2. Upper layer circuit; 3. Upper layer insulating UV; 4. Upper layer jumper; 5. Upper layer waterproof glue; 6. Middle layer PET; 7. Lower layer waterproof glue; 8. Lower layer jumper; 9. Lower layer insulating UV; 10. Lower layer circuit; 11. Lower layer PET one; 21. Rubber cap; 211. Bowl-shaped cap body; 212. Conductive column; 213. Conductive particles; 22. Upper layer PET two; 23. Waterproof glue; 24. Insulating UV; 25. Jumper; 26. Circuit; 261. PAD point; 27. Lower layer PET two. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, so that professionals in the field can implement or use the present invention.

[0021] refer to Figure 2 The utility model provides a two-layer flexible circuit board, comprising a rubber cap 21, an upper PET layer 22, a waterproof glue 23, an insulating UV 24, a jumper 25, a circuit 26 and a lower PET layer 27 arranged in sequence, a protective film 28 is attached to the output end of the circuit 26, and a layer of exhaust groove is printed on a side of the waterproof glue 23 corresponding to the upper PET layer 22;

[0022] Among them, the circuit 26, the jumper 25, the insulating UV 24 and the waterproof glue 23 are printed on the upper surface of the lower PET 27 in sequence; the upper PET 22 is correspondingly attached to the upper surface of the lower PET 27 printed with the circuit 26, the jumper 25, the insulating UV 24 and the waterproof glue 23; the rubber cap 21 is inverted and attached to the corresponding position of the upper surface of the upper PET 22;

[0023] refer to Figure 3 , the PAD point 261 of the line 26 is a claw shape that interlocks with each other; Figure 4 The rubber cap 21 includes an inverted bowl-shaped cap body 211, a conductive column 212 arranged on the axial inner side of the bowl-shaped cap body, and conductive particles 213 arranged at the end of the conductive column.

[0024] The two-layer flexible circuit board of the utility model is prepared by fusing the upper and lower layers of the three-layer flexible circuit board of the prior art into one layer, printing the circuit 26 on the lower layer PET 27, then printing the jumper 25, the insulating UV 24, and the waterproof glue 23 in sequence, and then combining the upper layer PET 22, and finally pasting the rubber cap 21 to complete the production of the two-layer flexible circuit board; this two-layer design reduces the production process and reduces the production cost; in addition, since the PAD point 261 is designed to be claw-shaped, the conduction principle is to install the conductive particles 213 on the conduction column 212 of the rubber cap 21, and press the rubber cap 21 to make the conductive particles 213 contact the claw-shaped PAD point 261, so that the left and right sides are connected to form a loop.

[0025] Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A two-layer flexible circuit board, characterized in that: It comprises a rubber cap (21), an upper layer of PET II (22), a waterproof glue (23), an insulating UV (24), a jumper (25), a circuit (26) and a lower layer of PET II (27) which are arranged in sequence; Wherein, the PAD points (261) of the line (26) are claw-shaped and interlocked with each other; The rubber cap (21) comprises an inverted bowl-shaped cap body (211), a conducting column (212) arranged axially inside the bowl-shaped cap body, and conductive particles (213) arranged at the end of the conducting column.

2. The two-layer flexible circuit board according to claim 1, characterized in that: A protective film (28) is attached to the output end of the circuit (26).

3. The two-layer flexible circuit board according to claim 1, characterized in that: A layer of exhaust groove is printed on the waterproof glue (23) on a side surface corresponding to the upper PET layer 2 (22).

4. The two-layer flexible circuit board according to claim 1, characterized in that: The circuit (26), jumper (25), insulating UV (24) and waterproof glue (23) are printed on the upper surface of the lower layer PET 2 (27) in sequence; The second upper layer PET (22) is correspondingly attached to the upper surface of the second lower layer PET (27) printed with the circuit (26), jumper (25), insulating UV (24) and waterproof glue (23); The rubber cap (21) is inverted and glued to a corresponding position on the upper surface of the upper layer PET 2 (22).

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