Hollowed double-sided flexible printed circuit board

Abstract

The invention discloses a hollowed double-sided flexible printed circuit board which comprises a substrate and covering films and is characterized in that the substrate is made from pure copper foil; a top-surface covering film provided with solder joint openings and a bottom-surface covering film provided with guide holes are respectively arranged on the top surface and the bottom surface of thesubstrate ; copper bars are pressed at the parts to be wired on the surface of the bottom-surface covering film; a drawing for forming a circuit is formed on the surface formed by the copper bars andthe bottom-surface covering film; a copper bar covering film, on which only the solder joint openings are exposed, is pressed on the surface of the circuit; and purity gum is stuck between the copperbars and the bottom-surface covering film. The invention has the advantages that the hollowed double-sided flexible printed circuit board is bendable, foldable, windable and capable of moving and expanding freely in a three-dimensional space; the heat dissipation performance thereof is good; by using the flexible printed circuit board, the flexible printed circuit board can be miniaturized and thinned with smaller size and lighter weight; and the film-to-film screen-pressing process can be realized, thereby integrating the connection of component units and wires, the thickness can be adjustedand the minimal limit can reach 0.07 mm.

Description

technical field [0001] The invention relates to a flexible circuit board, in particular to a hollow double-sided flexible printed circuit board suitable for a touch screen of a mobile phone. Background technique [0002] As we all know, with the development of science and technology, applied electronic products are gradually developing in the direction of lightness and multi-function, especially with the development of communication technology, mobile phones have become an indispensable part of people's daily life, and people's personalization of mobile phones Requirements continued to increase, and mobile phones with touch screens followed. The traditional PCB board is a hard board, because of its own characteristics that the hard board cannot be bent, so it will inevitably occupy a certain amount of space and increase the weight of the product. The above two disadvantages have restricted the product from becoming thinner and smaller. development strategy. In addition, fr...

AI Technical Summary

Problems solved by technology

The traditional PCB board is a hard board, because of its own characteristics that the hard board cannot be bent, so it will inevitably occupy a certain amount of space and increase the weight of the product. The above two disadvantages have restricted the product from becoming thinner and smaller. direction development strategy

In addition, from a technical point of view, the mobile phone touch screen adopts the process of pressing AG wires to achieve connection. If the hard board is too thick, it cannot be flattened after pressing, and the steps generated are also large, and the AG wires will break.

In addition, the demand of the market continues to be refined, and the general double-sided flexible printed circuit board will also be restricted due to its thickness, and it is impossible to selectively design more compact and reliable products.

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