Flexible circuit board and mobile terminal

Abstract

The invention provides a flexible circuit board. The flexible circuit board comprises a substrate; an alignment hole and pads are arranged on the substrate; the substrate includes a first surface and a second surface which are arranged oppositely; the alignment hole passes through the first surface and the second surface; the pads are fixed on the first surface through welding agent; a groove is arranged on the substrate; the groove is located between the pads and the alignment hole; and the groove is used for preventing excess welding agent from entering the alignment hole. According to the flexible circuit board, the groove is located between the pads and the alignment hole and is used for accommodating excess welding agent, and therefore, the excess welding agent can be prevented from flowing into the alignment hole and entering a main board when the pads are welded onto the flexible circuit board, and thus, the main board can be prevented from being short circuited, and the stability of a whole circuit can be improved.

Description

technical field [0001] The invention relates to the field of circuit boards, in particular to a flexible circuit board that can prevent solder from flowing into alignment holes. Background technique [0002] FPC (Flexible Primed Circuit), the Chinese name is flexible circuit board, also known as flexible circuit board, flexible circuit board, is an important electronic component. The circuit board is the support of electronic components and the provider of electrical connections for electronic components. Because it is made of electronics, it is called a "circuit board". [0003] Usually, in order to prevent the position shift when the FPC is welded on the main board, alignment holes are set on the FPC. The alignment holes can prevent the FPC from being offset from the main board pad, resulting in insufficient safety distance between the PFC pad and the pad on the main board, resulting in circuit failure. short circuit. Since the pads on the FPC are welded to the main boa...

AI Technical Summary

Problems solved by technology

Since the pads on the FPC are welded to the main board by flux, in order for the FPC to be firmly welded to the main board, a sufficient amount of flux must be used, but the amount of flux is difficult to control, and once the flux is too much, it is easy to Cause the flux to stay and leak to the motherboard through the alignment hole, and the flux leaked to the motherboard will cause short circuit of other network pads around the alignment hole of the motherboard

At the same time, the flux attached to the main board will also damage the flatness of the main board pad and affect the flat welding of the main FPC and the main board, resulting in poor welding

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