Circuit board connecting structure

Abstract

The invention discloses a circuit board connecting structure which comprises a first circuit board and a second circuit board. One of the two circuit boards is a soft board, the other of the two circuit boards is a hard board, or the two circuit boards are both soft boards. A plurality of signal transmission units are arranged on the surface of the first circuit board, through holes are reserved in the ends of the signal transmission units, and the through holes penetrate through the first circuit board and the signal transmission units. Signal transmission units and end through holes corresponding to the first circuit board are arranged on the surface of the second circuit board. The invention discloses a combing method of the circuit boards. Pin-shaped structures with the two ends thicker than the middles are formed in the corresponding through holes of the two circuit boards through combining materials, and firm connection of the two circuit boards is achieved.

Description

technical field [0001] The invention relates to a circuit board connection structure, in particular to a flexible-hard printed circuit board connection structure or a flexible-flexible circuit board connection structure with stable and reliable connection. Background technique [0002] With the development of electronic technology and the continuous improvement of people's requirements for the mobility and portability of electronic products, FPCB (Flexible Printed Circuit Board) can achieve a high degree of integration due to its deformable characteristics, so it is widely used in electronic products. It is becoming more and more widespread, and the traditional PCB (Printed Circuit Board) hard board is still indispensable as the core of electronic products. How to connect the two effectively and beautifully has become an urgent problem to be solved. There are many kinds of connection methods between flexible boards and rigid boards, or between flexible boards and flexible bo...

AI Technical Summary

Problems solved by technology

[0003] 1. In the glue bonding method, due to the small contact surface of the two circuit boards, the amount of glue is difficult to control. Too much glue may cause the circuit between the two circuit boards to be disconnected, and the overflow of glue will also cause unsightly appearance. The amount of glue is not enough It will also cause the mechanical connection of the two circuit boards to fail easily; at the same time, due to the physical characteristics of the glue, high temperature will often cause the glue to melt and destroy the bonding effect;

[0004] 2. In the welding method, since the traditional pads and pads are multiple strip metal wires arranged side by side, if the amount of tin is large during welding, tin overflow will cause two or more metal wires arranged side by side. The short circuit is caused by tin conduction between the wires; at the same time, the welding of two circuit boards must undertake the function of electrical transmission while mechanically connecting, so the bonding strength of the bonding material and the substrate bonding material is required to be high during welding; at the same time, the two circuit boards The characteristics of the small contact area of ​​the board have high requirements on the welding technology. Once the welding has problems such as false welding, it will easily lead to the failure of the mechanical connection and the electrical connection.

At the same time, both connection methods greatly limit the optional range of bonding materials

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