CN211150129U

CN211150129U - Flexible flat cable structure

Info

Publication number: CN211150129U
Application number: CN201922271100.9U
Authority: CN
Inventors: 秦玉城; 陈国书
Original assignee: P Two Electronic Technology Suzhou Co Ltd
Current assignee: P Two Electronic Technology Suzhou Co Ltd
Priority date: 2019-07-01
Filing date: 2019-12-17
Publication date: 2020-07-31
Anticipated expiration: 2029-12-17
Also published as: JP3229385U; KR20210000074U; TWM587354U

Abstract

The present creation is a flexible flat cable structure, which comprises a conductor layer, a first composite material layer, a first insulating adhesive layer, a second insulating adhesive layer and a reinforcing plate. After the conductor layer, the first composite material layer, the first insulating adhesive layer and the second insulating adhesive layer are combined, the conductor layer, the first composite material layer, the first insulating adhesive layer and the second insulating adhesive layer are divided into a plurality of sub-strips, each sub-strip provides a plurality of leads, and the first tail ends and the second tail ends of the leads are exposed on the second insulating adhesive.

Description

Flexible flat cable structure

[ technical field ] A method for producing a semiconductor device

The present invention relates to the field of flat cable technology, and more particularly to a structure of a strip-type flexible flat cable.

[ background of the invention ]

Conventionally, a Flexible Flat Cable (FFC) is a data Cable formed by laminating a PET insulating tin-plated Flat copper wire through an automation equipment production line, and is used for signal transmission.

The flexible flat cable has the characteristic of being capable of being bent at will, and different insulating layer thicknesses can be manufactured according to different requirements.

The present invention provides a flexible flat cable structure for providing stable characteristic impedance and suitable for high frequency signal transmission.

[ Utility model ] content

The first objective of the present invention is to provide a flexible flat cable structure, which provides a plurality of strips, and each strip is embedded with a single or multiple wires for increasing bending resistance and flexibility.

The second objective of the present invention is to provide a multilayer structure of the conductive layer, the insulating adhesive layer and the composite material layer according to the flexible flat cable structure.

The third objective of the present invention is to provide a stable characteristic impedance and suitable for high frequency signal transmission by adjusting the thickness of the composite material layer according to the flexible flat cable structure.

A fourth objective of the present invention is to provide one or two layers of composite material layers disposed on the side of the conductive layer according to the aforementioned flexible flat cable structure, so as to reduce the interference of shielding electromagnetic signals.

The fifth objective of the present invention is to connect the first connector and the second connector to the male end or the female end of the circuit board according to the aforementioned flexible flat cable structure, and to perform transmission of electronic signals.

A sixth objective of the present invention is to provide a reinforcing plate for combining the first connector and the second connector according to the aforementioned flexible flat cable structure, so as to increase the stability of the electrical connection between the first connector and the second connector.

The seventh objective of the present invention is to form a grounding opening on the composite material layer for connecting the grounding ends of the first connector and the second connector according to the flexible flat cable structure.

The eighth objective of the present invention is to provide the flexible flat cable structure, wherein the conductive layer has a body and a coupling portion, and a portion between the body and the coupling portion is a tapered inclined surface.

A ninth object of the present invention is to provide the flexible flat cable structure, wherein the cross-sectional shapes of the plurality of conductive wires of the coupling portion are the same or different from the cross-sectional shape of the plurality of conductive wires of the main body.

A tenth object of the present invention is to provide the flexible flat cable structure, wherein a first end and a second end of the conductive wire can be simultaneously exposed on the insulating adhesive layer on the same side or on different sides, so as to adapt to different circuit designs.

To achieve the above and other objectives, the present invention provides a flexible flat cable structure, which includes a conductive layer, a first composite layer, a first insulating adhesive layer, a second insulating adhesive layer and a reinforcing plate. The conductor layer has a first surface and a second surface. The first composite material layer is formed on the first surface of the conductor layer. Wherein the first composite material layer shields the electromagnetic signal. The first insulating glue layer is formed between the conductor layer and the first composite material layer. The second insulating glue layer is formed on one side of the conductor layer, which is not the first insulating glue layer. The reinforcing plate is disposed between the first insulating layer and the first composite layer, and a portion of the reinforcing plate is exposed from the first composite layer. The conductor layer, the first composite material layer, the first insulation adhesive layer and the second insulation adhesive layer are combined and then cut into a plurality of sub-strips, each sub-strip provides a plurality of leads, a first end and a second end of each lead are exposed on the first insulation adhesive layer or the second insulation adhesive layer at the same time, a first end of each lead is exposed on the first insulation adhesive layer and a second end of each lead is exposed on the second insulation adhesive layer or a first end of each lead is exposed on the second insulation adhesive layer and a second end of each lead is exposed on the first insulation adhesive layer.

Compared with the prior art, the flexible flat cable structure provided by the invention is a multilayer structure and is used for transmitting electric signals/power, and is divided into a plurality of strips, each strip is provided with a plurality of leads, and furthermore, at least one surface of the conductor layer is provided with a composite material layer for shielding electromagnetic signals.

The specific techniques employed in the present invention will be further described with reference to the following examples and accompanying drawings.

[ description of the drawings ]

Fig. 1 is a schematic cross-sectional view illustrating a flexible flat cable structure according to a first embodiment of the present invention.

Fig. 2 is a schematic top view illustrating the structure of the flexible flat cable of the present invention.

Fig. 3 is a cross-sectional view of a flexible flat cable according to a second embodiment of the present invention.

Fig. 4 is a schematic top view illustrating the structure of the flexible flat cable of fig. 3.

Description of the main element symbols:

10. 10' flexible flat cable structure

12 conductive layer

122 first side

124 second side

126 conducting wire

1262 first end

1264 second end

128 body

1210 coupling part

14 first composite Material layer

16 first insulating glue layer

18 second insulating glue layer

20 reinforcing plate

22 first connector

24 second connector

26 second composite layer

264 aluminum foil

d clearance

[ detailed description ] embodiments

For a fuller understanding of the objects, features and advantages of the present disclosure, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In this disclosure, the use of "a" or "an" is used to describe elements, components and assemblies described herein. This is for convenience of illustration only and provides a general sense of the scope of the present disclosure. Thus, unless clearly indicated to the contrary, such description should be read to include one, at least one and the singular also includes the plural.

In this disclosure, the terms "comprising," "including," "having," "containing," or any other similar term are intended to cover non-exclusive inclusions. For example, an element, structure, article, or apparatus that comprises a plurality of elements is not limited to only those elements but may include other elements not expressly listed or inherent to such element, structure, article, or apparatus. In addition, unless expressly stated to the contrary, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or".

Please refer to fig. 1, which is a schematic cross-sectional view illustrating a flexible flat cable structure according to a first embodiment of the present invention. In fig. 1, the flexible flat cable structure 10 includes a conductive layer 12, a first composite material layer 14, a first insulating adhesive layer 16, a second insulating adhesive layer 18 and a reinforcing plate 20.

The conductive layer 12 has a first surface 122 and a second surface 124. Here, the first face 122 refers to a lower face and the second face 124 refers to an upper face. The conductive layer 12 is composed of a plurality of conductive wires 126, and can be seen from the top view of fig. 2. The plurality of conductive lines 126 are separated by a gap d. The number of the conductive lines 126 is five, but in other embodiments, the number can be adjusted according to the actual requirement.

The conductive layer 12 further includes a body 128 and a coupling portion 1210. The body 128 is connected to the coupling portion 1210, and the enlarged schematic view is also referred to. The portion between the body 12 and the coupling portion 1210 presents a slope (pitch) suitable for the connection head mentioned later. Wherein, the cross-sectional shape of the wire 126 of the coupling portion 1210 is the same as or different from the cross-sectional shape of the wire 126 at the body 128. Here, the sectional shape of the wire 126 at the body 128 is a circle, and the sectional shape of the wire 126 at the coupling part 1210 is a sheet. In other embodiments, the cross-sectional shape of the conductive wires 126 on the body 128 may also be square, triangular, rectangular, polygonal, etc.

Returning to fig. 1, the first composite material layer 14 is formed on the first surface 122 of the conductor layer 12, for example, the material of the first composite material layer 14 may be a substrate prepared by a composite process of two or more materials, such as a metal material, a ceramic material, or a polymer material. Since the first composite material layer 14 includes a metal material, it is resistant to electromagnetic signals. The first composite material layer 14 is stacked on the conductor layer 12, and the length of the first composite material layer 14 is shorter than the length of the conductor layer 12.

The first insulating adhesive layer 16 is formed between the conductive layer 12 and the first composite material layer 14 to bond the conductive layer 12 and the first composite material layer 14, for example, the bonding manner is adhesion, coupling or fitting, and the material of the first insulating adhesive layer 18 is not only used to bond the first composite material layer 14 and the conductive layer 12, but also can prevent the electrical signals between the plurality of wires 126 from contacting each other and causing malfunction.

The second insulating adhesive layer 18 is formed on the side of the conductive layer 12 other than the first insulating adhesive layer 16 to prevent the electrical signals between the plurality of wires 126 from contacting each other and causing malfunction.

The reinforcing plate 20 is disposed between the first insulating adhesive layer 16 and the first composite material layer 14, and a portion of the reinforcing plate 20 is exposed from the first composite material layer 14. The purpose of the stiffener 20 is to increase the thickness of the end of the conductor layer 12, which can be used to connect an electrical connector to snap the wire 126 to the electrical connector.

The conductive layer 12, the first composite material layer 14, the first insulating adhesive layer 16 and the second insulating adhesive layer 18 are bonded and then cut into a plurality of strips (or strands), and each strip (or strand) is provided with one or more conductive wires 126, as shown in the enlarged view of fig. 2. The first ends 1262 and the second ends 1264 of the wires 126 are exposed at the second insulation layer 18. In addition to the embodiment in which the plurality of conductive traces 126 are exposed on the same side, i.e., simultaneously exposed on the second insulating adhesive layer 18, in another embodiment, the first ends 1262 and the second ends 1264 of the plurality of conductive traces 126 may be respectively exposed on the first insulating adhesive layer 16 and the second insulating adhesive layer 18, for example, the first ends 1262 of the plurality of conductive traces 126 are exposed on the first insulating adhesive layer 16 and the second ends 1264 of the plurality of conductive traces 126 are exposed on the second insulating adhesive layer 18.

Please refer to fig. 3, which is a schematic cross-sectional view illustrating a flexible flat cable structure according to a second embodiment of the present invention. In fig. 3, the flexible flat cable structure 10' includes a first connector 22, a second connector 24 and a second composite layer 26 in addition to the conductive layer 12, the first composite layer 14, the first insulating adhesive layer 16, the second insulating adhesive layer 18 and the stiffener 20 of the first embodiment.

Fig. 4 is a schematic top view illustrating the flexible flat cable structure of fig. 3. The first connector 22 is a male connector or a female connector, and here, a male connector is taken as an example. The first connector 22 provides a plurality of terminals for connecting the first ends 1262 of the plurality of wires 126. In addition, the first connector 22 provides a ground terminal for connecting to the ground terminal of the circuit board. In another embodiment, the first connector 22 may also directly provide the first ends 1262 of the plurality of wires 126.

The second connector 24 can also be a male connector or a female connector, and here, the male connector is taken as an example. The second connector 24 provides a plurality of terminals for connecting the second ends 1264 of the plurality of wires 126. In addition, the second connector 24 provides a ground terminal for connecting to a ground terminal of the circuit board. In another embodiment, the second connector 24 may also directly provide the second ends 1264 of the plurality of wires 126.

A second composite material layer 26 is formed on the second side of the conductor layer 12. The second composite material layer 26 can be used for shielding electromagnetic signals. In another embodiment, the second composite layer 26 further forms ground openings 262, which are respectively formed on both sides of the second composite layer 26. The ground opening 262 can be used for coupling the ground terminal of the first connector 22 and the ground terminal of the second connector 24. In another embodiment, an aluminum foil 264 is further disposed at the ground opening 262 for connecting the ground terminal of the first connector 22 and the ground terminal of the second connector 24.

Although the embodiments of the present disclosure have been described above, it should be understood that various changes in the form, construction, features, methods and quantities described in the claims may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and therefore the scope of the present disclosure should not be limited by the claims appended hereto.

Claims

1. A flexible flat cable structure, comprising:

a conductor layer having a first surface and a second surface;

a first composite material layer formed on the first surface of the conductor layer, wherein the first composite material layer shields electromagnetic signals;

the first insulating glue layer is formed between the conductor layer and the first composite material layer;

the second insulating glue layer is formed on one side, which is not the first insulating glue layer, of the conductor layer; and

the reinforcing plate is arranged between the first insulating glue layer and the first composite material layer, and part of the reinforcing plate is exposed out of the first composite material layer;

the conductor layer, the first composite material layer, the first insulating adhesive layer and the second insulating adhesive layer are combined and then are divided into a plurality of sub-strips, and each sub-strip provides a plurality of leads.

2. The flexible flat cable structure according to claim 1, wherein the first ends and the second ends of the plurality of conductive wires are exposed to the first insulating adhesive layer or the second insulating adhesive layer simultaneously, or the first ends and the second ends of the plurality of conductive wires are exposed to the first insulating adhesive layer and the second insulating adhesive layer respectively.

3. The flexible flat cable structure according to claim 1, further comprising a second composite material layer formed on the second surface of the conductive layer, wherein the second composite material layer shields electromagnetic signals.

4. A flexible flat cable structure according to claim 3, wherein said second composite layer further forms grounding openings respectively formed on both sides of said second composite layer.

5. The flexible flat cable structure according to claim 4, wherein an aluminum foil is further included and is disposed in said ground opening.

6. The flexible flat cable structure according to claim 4, further comprising a first connector and a second connector, wherein the first connector connects the first ends of the plurality of wires and the second ends of the plurality of wires, and the ground terminal of the first connector and the ground terminal of the second connector are coupled to the ground opening respectively.

7. The flexible flat cable structure according to claim 1, wherein the conductive layer further comprises a body and a coupling portion, the body is connected to the coupling portion, and a portion between the body and the coupling portion is inclined.

8. The flexible flat cable structure according to claim 7, wherein the cross-sectional shapes of the plurality of wires at the coupling portion are the same or different from the cross-sectional shapes of the plurality of wires at the body, and wherein the cross-sectional shapes of the plurality of wires at the body are square, triangular, rectangular, and polygonal.

9. The flexible flat cable structure according to claim 8, wherein the plurality of conductive wires located on the body have a circular cross-sectional shape.

10. The flexible flat cable structure according to claim 7, wherein the plurality of conductive wires at the coupling portion have a sheet-like cross-sectional shape.

11. The flexible flat cable structure according to claim 9, wherein said plurality of conductors are separated by a gap.