JPS63299065A - Connecting method for electronic component - Google Patents

Abstract

PURPOSE:To prevent the unsatisfactory connection by redundantly providing spare terminals entirely not contributing electrically on both end sides of terminals of a printed circuit board and connecting them via an anisotropic conductive film. CONSTITUTION:The first electronic component 1 having the first connection sections 2, 2a, 2b plurally protruded at the preset pitch and spare connection sections 2c, 2d protruded on both end sides of the first connection sections 2, 2a, 2b and the second electronic component 3 having the second connection sections 4, 4a, 4b formed in response to the first connection sections 2, 2a, 2b are connected via an anisotropic conductive film 5 between the first connection sections 2, 2a, 2b including the spare connection sections and the second connection sections 4, 4a, 4b to unify the connection state of the primary connection sections requiring the electric function. The unsatisfactory connection between the connection sections can be thereby prevented.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a method for connecting electronic components.

(Prior Art) Portable information media called card calculators, IC cards, and memory cards are assembled by adhesive because the electronic components that make up them are made into films or miniaturized. .

For example, bonding of electronic devices such as memory cards will be explained with reference to FIG. That is, a plurality of terminals (2), which are first connection parts, are formed at a predetermined pitch on a printed circuit board (1), which is a first electronic component, and a liquid crystal display board (3), which is a second electronic component, is formed on a printed circuit board (1), which is a first electronic component. ) side is formed with the same number of electrodes (4) that are the same pitch as the terminals (2) and are second connection parts, and with these terminals (2) and electrodes (4) facing each other, After interposing the anisotropic conductive film (5), which is a type of adhesive, the conductive particles dispersed in the anisotropic conductive film (5) are bonded by thermocompression to the terminals (2) and electrodes (4). The two are electrically conductively connected.

(Problems to be Solved by the Invention) Looking at the adhesive cross section after thermocompression bonding, as also shown in Figure 2, the adhesive state near both ends of the connected terminal (2) and electrode (4) is as follows. Compared to other areas, there are areas with poor adhesion where the printed circuit board (1) and liquid crystal display board (3) are not sufficiently bonded, and the terminals (2a) and (2b) near both ends and the electrode (4)
a) and (4b) caused connection failure. In view of these circumstances, an object of the present invention is to provide a method for uniformly connecting connection parts such as terminals and electrodes.

[Structure of the invention] (Means and effects for solving the problem) A plurality of first connecting portions are formed protruding from each other at a predetermined pitch, and a plurality of first connecting portions are formed protruding from both ends of the first connecting portion. An anisotropic conductive film is used when connecting a first electronic component having one or more preliminary connections and a second electronic component having a second connection portion formed corresponding to the first connection portion. Connected by intervening between the first connection part and the second connection part including the preliminary connection part,
The adhesive condition of the original connection parts that require electrical function is made uniform.

(Example) EMBODIMENT OF THE INVENTION Hereinafter, this invention will be explained based on drawing which shows an Example.

Note that parts common to those in FIG. 2 are given the same reference numerals. That is, in FIG. 1 showing the first embodiment, the second
The difference from the conventional example shown in the figure is that, on both ends of the terminals (2) of the printed circuit board (1), there are extra terminals (2c )
It is located at the point where (2d) is formed and connected. By forming such a terminal, the defective area (6) moves to the vicinity of the spare terminal (2c) (2b) during thermocompression bonding, and the electrode (4a) (4
The terminals (2a) and (2b) connected to b) are in the same adhesive state as the other terminals.

In the above embodiment, only one extra terminal was formed at both ends, but two or more terminals may be formed. Furthermore, it may be applied to connecting electrodes and terminals between printed circuit boards. Further, preliminary connections such as preliminary terminals are not limited to terminals, but can also be applied to connections between electrodes as long as the electrodes have a protruding shape. It is preferable that the preliminary connection has the same shape as the original connection, but it may be slightly larger or smaller.

[Effect of the invention] By providing preliminary connections that serve as dummy on both sides of the original connection, it is possible to make the adhesion state of the connection parts that require the original electrical function uniform, and the connection part We were able to prevent poor connections between the two.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. (1,,) ...Printed circuit board (one electronic component) (
2) (2a) (2b)...Terminal (first connection part)
(3)...φLCD display board (second electronic component) (4) (
4a) (4b) ... Electrode (second connection part) (4c
) (4d) ... Spare terminal (spare connection) (5)
...Anisotropic conductive film

Claims (5)

[Claims] (1) A first electronic component having a plurality of protruding first connecting portions formed at a predetermined pitch and one or more preliminary connecting portions protruding from both ends of the first connecting portion; , when connecting to a second electronic component having a second connection part formed corresponding to the first connection part, an anisotropic conductive film is applied to the first connection part including the preliminary connection part and the second connection part. A method of connecting electronic components by interposing them between the connecting parts of the (2) The method for connecting electronic components according to claim 1, wherein the electronic components to be connected are a printed circuit board and a liquid crystal display panel. (3) The method for connecting electronic components according to claim 1, wherein the electronic components to be connected are printed circuit boards. (4) The method for connecting electronic components according to claim 1, wherein the preliminary connection portion has the same shape as the protruding connection portion. (5) When the second connection part is formed to protrude, there are spare connection parts on both ends of the second connection part that correspond to the preliminary connection parts on the first electronic component side, and the preliminary connection parts are connected to each other. A method for connecting electronic components according to claim 1, wherein the electronic components are connected.