FPC capable of reducing self-twisting stress

Abstract

The invention discloses an FPC capable of reducing the self-twisting stress, and belongs to the technical field of circuit boards. The FPC comprises a flexible substrate and a wiring layer arranged onthe flexible substrate. The flexible substrate comprises a horizontal part, a vertical part and a bending part connected with the horizontal part and the vertical part, wherein the width of the bending part is smaller than that of the horizontal part and that of the vertical part, so that a distortion stress acting on the end part of the flexible substrate is transferred to the narrower bending part. According to the invention, the width of the bending part of the flexible substrate is reduced, and corner structures with different angles are arranged at the inner side and the outer side of the bending part, so that the distortion stress generated at the joints where the horizontal part and the vertical part of the flexible substrate are connected with the connector is transferred to the narrower bending part, thereby reducing the distortion degrees of the horizontal part and the vertical part, enabling the connection areas among the horizontal part, the vertical part and the connectorto be more stable, and improving the reliability of a product in the use process.

Description

technical field [0001] The invention belongs to the technical field of circuit boards, and more specifically relates to an FPC capable of reducing its own twisting stress. Background technique [0002] Flexible printed circuit board (Flexible Printed Circuit Board, FPC), also known as "FPC flexible board", is a printed circuit made of flexible insulating substrates, which has many advantages that rigid printed circuit boards do not have; for example, it can be bent freely, rolled Winding and folding can be arranged arbitrarily according to the requirements of space layout, and can be moved and stretched arbitrarily in three-dimensional space, so as to achieve the integration of component assembly and wire connection. The use of FPC flexible boards can greatly reduce the volume of electronic products, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. [0003] According to the different require...

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Problems solved by technology

[0004] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides an FPC that can reduce its own twisting stress, the purpose of which is to reduce the stress of the flexible circuit board itself on the connector caused by processing errors, and enhance the reliability of the FPC , It can also reduce the stress of the connector of the printed circuit board and the flexible circuit board, thereby reducing the difficulty of installation, and solving the existing problems of the existing L-shaped FPC board and the installation of the connector. The problem that the interface is easy to disengage after a period of time

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