CN105611726B - Rigid Flex and mobile terminal - Google Patents

Abstract

A soft and hard combination board and a mobile terminal, including a printed circuit board and a flexible circuit board connected to one end of the printed circuit board, the printed circuit board is provided with a first ground wire and a plurality of first signal traces, the first ground wire is provided On one side of the circuit board adjacent to the flexible circuit board, several via holes are provided on the first ground wire, and the several via holes all penetrate the printed circuit board. Several first signal traces are arranged on one side of the first ground wire, and several The first signal trace is arranged away from the flexible circuit board. In the rigid-flex board and the mobile terminal provided by the present invention, a first ground wire is provided on the printed circuit board, and a plurality of via holes are provided on the first ground wire. When performing laser material removal, if the laser damages the first grounding wire, the grounding function of the printed circuit board can still be realized by using the several via holes, thereby preventing its grounding failure from causing the signal line to be unable to connect to the signal, ensuring the printing The realization of the functional circuit on the circuit board improves the reliability of the soft-hard combination board.

Description

Rigid-flex board and mobile terminal

technical field

The invention relates to the technical field of circuit boards, in particular to a rigid-flex board and a mobile terminal.

Background technique

Rigid-flex boards are flexible circuit boards and rigid circuit boards, which are combined according to relevant process requirements through pressing and other processes to form circuit boards with the characteristics of flexible circuit boards and rigid circuit boards.

At present, when laser cutting is used to remove materials, since the laser itself has a certain width, when the grounding line and signal line are arranged on the hard board, it may cause burnout or damage to the signal line or grounding line on the hard board , thus affecting the performance of the circuit. In severe cases, the wiring on the soft board connected to the hard board will be torn off, resulting in the failure of the functional circuit on the soft board, and the reliability of the soft-hard combination board cannot be guaranteed.

Contents of the invention

In view of the above-mentioned problems in the prior art, the technical problem to be solved by the present invention is to provide a rigid-flex board and a mobile terminal that prevents damage to hard board circuits during laser material removal and ensures reliability.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

In the first aspect, the present invention provides a rigid-flex board, which includes a printed circuit board and a flexible circuit board connected to one end of the printed circuit board, and the printed circuit board is provided with a first ground wire and a plurality of first signal wires. line, the first ground line is set on the side of the printed circuit board adjacent to the flexible circuit board, and several via holes are opened on the first ground line, and the several via holes are arranged along the first The routing directions of the grounding wires are arranged in a row, and the plurality of via holes all pass through the printed circuit board, the plurality of first signal routings are arranged on one side of the first grounding wire, and the plurality of via holes The first signal trace is arranged away from the flexible circuit board.

Wherein, the wire diameter of the first ground wire is larger than the wire diameter of the first signal trace.

Wherein, the diameter of the first ground wire is greater than or equal to 1mm.

Wherein, the printed circuit board includes a first surface and a second surface oppositely disposed, the first ground line is provided on the first surface, and the plurality of via holes all penetrate to the second surface.

Wherein, a second ground wire is provided on the second surface corresponding to the first ground wire, and the wire diameter of the second ground wire is the same as that of the first ground wire.

Wherein, signal via holes are opened on the plurality of first signal traces, and the signal via holes penetrate to the second surface.

Wherein, the hole wall of the signal via hole is coated with a metal coating, and the metal coating is a metal copper coating or a metal tin coating.

Wherein, the second surface is provided with a plurality of second signal traces corresponding to the plurality of first signal traces, and the signal via hole is provided with a wire connecting the first signal traces and the second signal traces. Wire conductors.

Wherein, the distances between two adjacent first signal traces are equal.

In the second aspect, the present invention also provides a mobile terminal, the mobile terminal includes a main body, a main board disposed inside the body, and the rigid-flex board as described in the first aspect above, and the rigid-flex board is set on the main board and electrically connected with the main board.

In the rigid-flex board and the mobile terminal provided by the present invention, a first ground line is provided on the side of the printed circuit board adjacent to the flexible circuit board, and several via holes are provided on the first ground line. When performing laser material removal, if the laser damages the first grounding wire, the grounding function of the printed circuit board can still be realized by using the several via holes, thereby preventing its grounding failure from causing the signal line to fail to connect to the signal, ensuring It improves the realization of the functional circuit on the printed circuit board, thereby improving the reliability of the soft-rigid combination board.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of a rigid-flex board provided by an embodiment of the present invention;

FIG. 2 is a schematic view of the other side of FIG. 1 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

For the convenience of description, spatial relative terms such as "under", "below", "below", "over", "upper" and other spatial relative terms can be used to describe the One element or feature shown in relationship to another element or feature(s). It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, it can be directly on, directly on, or directly on the other element or layer. Connected or coupled to another element or layer, or intervening elements or layers may be present.

It should be understood that the terminology used herein is only used to describe specific embodiments, not to limit the present invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly dictates otherwise. Further, when used in this specification, the term "comprises" and/or "comprises" indicates the existence of said features, integers, steps, elements and/or components, but does not exclude one or more other features, integers, The presence or addition of steps, elements, components and/or combinations thereof. The following descriptions in the specification are preferred implementation modes for implementing the present invention, but the descriptions are for the purpose of illustrating the general principles of the present invention, and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be defined by the appended claims.

Please refer to FIG. 1 and FIG. 2 together. The present invention provides a rigid-flex board 100 . The rigid-flex board 100 includes a printed circuit board 10 and a flexible circuit board 20 connected to one end of the printed circuit board 10 . The printed circuit board 10 is provided with a first ground wire 11 and a plurality of first signal traces 12 , and the first ground wire 11 is disposed on a side of the printed circuit board 10 adjacent to the flexible circuit board 20 . Several via holes 111 are opened on the first ground wire 11, and the several via holes 11 are arranged along the running direction of the first ground wire 11, and the several via holes 111 all pass through the printed circuit board 10 . The several first signal traces 12 are disposed on one side of the first ground wire 11 , and the several first signal traces 12 are disposed away from the flexible circuit board 20 . It can be understood that the rigid-flex board 100 is applied to a mobile terminal, which may be a mobile phone, a tablet computer, a notebook computer, etc., and the rigid-flex board 100 is responsible for the conduction between electronic components in the mobile terminal. .

In the rigid-flex board 100 provided by the embodiment of the present invention, several via holes 111 penetrating through the printed circuit board 10 are provided on the first ground wire 11 . When performing laser material removal, when the first grounding wire 11 is burnt out by the laser, the grounding function can still be realized by using the several via holes 111, which ensures the realization of the functional circuit on the printed circuit board 10 and ensures the The use reliability of the rigid-flex board 100 .

In this embodiment, the printed circuit board 10 is a regular square board. The printed circuit board 10 includes a first surface 13 and a second surface 14 oppositely disposed, and the first ground wire 11 is disposed on the first surface 13 . Specifically, the wire diameter of the first ground wire 11 is larger than the wire diameter of the first signal wire 12, and preferably, the wire diameter of the first ground wire 11 is greater than or equal to 1mm, so that when laser removal material, since the first grounding wire 11 has a relatively large diameter, it is not easy to be burned or burned by the laser, thereby ensuring the realization of the grounding function of the printed circuit board 10 . It can be understood that, in other embodiments, the diameter of the first ground wire 11 can also be set according to actual wiring conditions.

Further, the first ground wire 11 is arranged on the edge of the printed circuit board 10 at a distance greater than 1 mm from the flexible circuit board 20 , so that the first ground wire 11 and the flexible circuit board 20 can run on The connection of wires realizes the grounding function on the flexible circuit board 20, and at the same time, it can also prevent the first grounding wire 11 from being burned or possibly causing damage to the circuit on the flexible circuit board 20. .

The plurality of via holes 111 are opened on the first ground line 11 . In this embodiment, since the diameter of the first ground wire 11 is relatively large, the diameter of the several via holes 111 is slightly smaller than that of the first ground wire 11, or the diameter of the several via holes 111 The diameter of the hole is equal to the wire diameter of the first grounding wire 11. The plurality of via holes 111 penetrate from the first surface 13 to the second surface 14, so as to further realize the grounding function of the printed circuit board 10, and then when performing laser material removal, if the first When the ground wire 11 is burnt or damaged by the laser, since the several via holes 111 penetrate to the second surface 14, the via holes 111 can serve as the ground holes of the printed circuit board 10, thereby realizing the The grounding function of the above-mentioned printed circuit board 10, and then ensure the normal operation of other functional circuits on the printed circuit board 10. Preferably, the diameter of the plurality of via holes 111 may be 0.5 mm to 1.0 mm. And in order to ensure the grounding function of the printed circuit board 10 , the distances between two adjacent via holes 111 are equal.

Further, a second ground wire 141 is provided on the second surface 14 corresponding to the first ground wire 11 , and the wire diameter of the second ground wire 141 is the same as that of the first ground wire 11 . Specifically, the first ground wire 11 is connected to the second ground wire 141 through the plurality of via holes 111 to realize the grounding function of the printed circuit board 10 . When performing laser material removal, if the first ground wire 11 is burnt or damaged by the laser, the via hole 111 can still be connected to the second ground wire 141, thus enabling the grounding of the printed circuit board 10 function is realized. It can be understood that, in other embodiments, the wire diameter of the second ground wire 141 may not be the same as the wire diameter of the first ground wire 11, for example, the wire diameter of the second ground wire 141 is smaller or larger than The first ground wire 11 can be any, and it can be set according to the specific wiring situation.

The plurality of first signal wires 12 are disposed on a side of the first ground wire 11 away from the flexible circuit board 20 . In this embodiment, the plurality of first signal wires 12 are used to implement signal transmission on the printed circuit board 10 . In order to facilitate wiring and ensure signal continuity, the distance between two adjacent first signal traces 12 is equal. The first signal trace 12 is disposed on the first surface 13 , and a signal via hole 121 is opened on the first signal trace 12 , and the signal via hole 121 penetrates to the second surface 14 . Specifically, the signal via hole 121 is opened on one end of the first signal trace 12 to facilitate the connection between the first signal trace 12 and other signal traces. Preferably, in order to enhance the overall structural strength of the printed circuit board 10, the hole wall of the signal via hole 121 is coated with a metal coating (not shown), and the metal coating is a metal copper coating or a metal coating. The tin coating is used to increase the metal content on the printed circuit board 10 and enhance the overall structural strength of the printed circuit board 10 .

Further, a conductive member (not shown) is arranged in the signal via hole 121 , and a plurality of second signal traces 142 are arranged on the second surface 14 corresponding to the plurality of first signal traces 12 , The conductive member connects the first signal trace 12 and the second signal trace 142 to realize signal connection and signal transmission on the printed circuit board 10 .

In this embodiment, the flexible circuit board 20 may be a square board matching the shape of the printed circuit board 10 . The flexible circuit board 20 is provided with grounding lines and signal lines to realize the grounding function and signal transmission function of the flexible circuit board 20 .

The present invention also provides a mobile terminal (not shown), the mobile terminal includes a body (not shown), a motherboard (not shown) inside the body, and the rigid-flex board 100 , the The rigid-flex board 100 is disposed inside the body and electrically connected to the main board. The mobile terminal may be a mobile phone, a computer, a tablet, a handheld game console or a media player, etc.

In the rigid-flex board and the mobile terminal provided by the present invention, a first ground line is provided on the side of the printed circuit board adjacent to the flexible circuit board, and several via holes are provided on the first ground line. When performing laser material removal, if the laser damages the first grounding wire, the grounding function of the printed circuit board can still be realized by using the several via holes, thereby preventing its grounding failure from causing the signal line to fail to connect to the signal, ensuring It improves the realization of the functional circuit on the printed circuit board, thereby improving the reliability of the soft-rigid combination board.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific examples," "some examples," or the like "first embodiment" etc. A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The implementation methods described above do not constitute a limitation to the scope of protection of the technical solution. Any modifications, equivalent replacements and improvements made within the spirit and principles of the above implementation methods shall be included in the protection scope of the technical solution.

Claims (8)

1. A rigid-flex board, characterized in that it includes a printed circuit board and a flexible circuit board connected to one end of the printed circuit board, the printed circuit board is provided with a first ground wire and a plurality of first signal traces , the first grounding line is arranged on the side of the printed circuit board adjacent to the flexible circuit board, and a plurality of via holes are opened on the first grounding line, and the plurality of via holes are arranged along the first grounding line. The wiring directions of the wires are arranged in a row, and the several via holes all pass through the printed circuit board, the several first signal traces are arranged on one side of the first ground wire, and the several first signal traces are arranged on one side of the first ground wire, and the several first signal traces A signal trace is arranged away from the flexible circuit board; Wherein, the wire diameter of the first ground wire is larger than the wire diameter of the first signal trace; or, The diameter of the first ground wire is greater than or equal to 1 mm; or, Wherein, the printed circuit board includes a first surface and a second surface oppositely disposed, the first ground line is provided on the first surface, and the plurality of via holes all penetrate to the second surface. 2. The rigid-flex board according to claim 1, wherein a second ground wire is provided on the second surface corresponding to the first ground wire, and the wire diameter of the second ground wire is the same as The first ground wires are the same. 3 . The rigid-flex board according to claim 1 , wherein signal via holes are provided on the plurality of first signal traces, and the signal via holes penetrate to the second surface. 4 . 4. The rigid-flex board according to claim 3, wherein the wall of the signal via hole is coated with a metal coating, and the metal coating is a metal copper coating or a metal tin coating. 5. The rigid-flex board according to claim 4, wherein a plurality of second signal traces are arranged on the second surface corresponding to the plurality of first signal traces, and the signal via holes Conductive elements connecting the first signal traces and the second signal traces are arranged inside. 6. The rigid-flex board according to claim 1, wherein the distances between two adjacent first signal traces are equal. 7. A rigid-flex board, characterized in that it includes a printed circuit board and a flexible circuit board connected to one end of the printed circuit board, the printed circuit board is provided with a first ground wire and a number of first signal traces , the first grounding line is arranged on the side of the printed circuit board adjacent to the flexible circuit board, and a plurality of via holes are opened on the first grounding line, and the plurality of via holes are arranged along the first grounding line. The wiring directions of the wires are arranged in a row, and the several via holes all pass through the printed circuit board, the several first signal traces are arranged on one side of the first ground wire, and the several first signal traces are arranged on one side of the first ground wire, and the several first signal traces A signal trace is arranged away from the flexible circuit board; Wherein, the distances between two adjacent first signal traces are equal. 8. A mobile terminal, characterized in that the mobile terminal comprises a body, a main board disposed inside the body, and a rigid-flex board according to any one of claims 1 to 7, the rigid-flex board is set on the main board and electrically connected with the main board.