JPH04352132A - Connection terminal array structure of electronic component, tape carrier package, and liquid crystal display using same package - Google Patents

Abstract

PURPOSE:To easily position and connect multi-pin, narrow-pitch terminal groups with high accuracy even if they shift relatively in position. CONSTITUTION:The connection terminal array structure of the electronic component which has two parallel opposite sides and also has many connection terminals on the sides adjacently in parallel is constituted by slanting the connection terminals on one side slantingly at a specific angle to the connection terminals formed on the other side. The tape carrier package 3 is formed by forming a lead 1a on one side opposite the other side across a mounted LSI chip 2 slantingly at a specific angle to a lead 1b formed on the other side. Further, the liquid crystal display device is constituted by interposing the tape carrier package 3 between the connection terminals of a liquid crystal display element and the connection terminals of a printed circuit board corresponding to the connection terminals.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a connecting terminal arrangement structure for electronic components, a tape carrier package, and a liquid crystal display device using the tape carrier package.
In particular, the present invention relates to a connection terminal arrangement structure suitable for easy and highly accurate positioning and connection even if there is a relative positional shift between these connected multi-pin, narrow-pitch terminal groups.

0002

[Prior Art] Currently, various electrical devices such as personal computers are becoming smaller, lighter, and more sophisticated.
On the other hand, along with larger display screens such as liquid crystal display devices, the size of liquid crystal display elements and the number of display pixels are increasing at an accelerated pace. In response to this, TAB (Tape Out
A tape carrier package (hereinafter referred to as TCP) is a tape carrier package (hereinafter referred to as TCP) in which an LSI chip is connected via bumps of metal protruding electrodes to a tape film on which a wiring pattern with multi-pin leads is formed using a tape carrier package (hereinafter referred to as TCP) that is sealed with a resin. ) is used to connect the terminals of multi-pin, narrow-pitch electronic components. For example, to connect a liquid crystal display element and a printed circuit board for driving the liquid crystal in a liquid crystal display device, a TCP on which a driving LSI chip is mounted is interposed between the liquid crystal display element and the printed circuit board. A widely used method is to connect a large number of leads (outer leads) of the TCP to both the connection terminals of the liquid crystal display element and the corresponding connection terminals of the printed circuit board. In this case, TCP,
Each connection terminal of the liquid crystal display element and printed circuit board is
Both are arranged in parallel in the same direction.

0003

However, in the conventional arrangement structure of connection terminals, extremely high-precision mounting technology and mounting process are required in order to realize terminal connections with high reliability. For example, when connecting via TCP, such as the connection between a liquid crystal display element in a liquid crystal display device and a printed circuit board for driving the liquid crystal, the precision of the pitch and line width of the leads formed on the TCP, The positional accuracy of the connection terminals formed on the display element panel and the printed circuit board, and the T between the liquid crystal display element panel and the printed circuit board.
It is difficult to realize a highly reliable connection unless all the accuracy such as the mounting accuracy when mounting the CP clears a predetermined accuracy. There are limits to the improvement of each of these precisions, but in order to increase each precision, it is necessary to increase the cost of various equipment such as measurement equipment and inspection equipment as well as equipment for manufacturing each part. However, there are problems that prolong manufacturing time and reduce manufacturing efficiency, and these problems become more prominent as the number of pins and pitch of connection terminals becomes narrower. It was getting worse.

[0004] In view of the problems of the above-mentioned prior art, the present invention
Connecting terminal arrangement structure and tape carrier for electronic components that enable easy and highly accurate positioning and connection between groups of multi-pin, narrow-pitch terminals to be connected, even if there is relative positional deviation An object of the present invention is to provide a package and a liquid crystal display device using the tape carrier package.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an electronic component having two parallel opposing sides and in which a large number of connecting terminals are arranged adjacent to each other in parallel on each side. The electronic component has a connection terminal arrangement structure in which the connection terminals on one side are formed at a predetermined angle with respect to the connection terminals formed on the other side.

[0006] In a tape carrier package comprising a tape film on which a wiring pattern having multi-pin leads is formed, and an LSI chip mounted on the tape film via bumps of metal protruding electrodes, the mounted The leads on one side that sandwich the LSI chip,
The lead is formed so as to be inclined at a predetermined angle with respect to the lead formed on the other side.

[0007] Furthermore, the structure of the liquid crystal display device is such that a tape carrier package having the above structure is interposed between the connection terminal of the liquid crystal display element and the connection terminal of the printed circuit board corresponding to the connection terminal. This is what I did.

[0008]

[Operation] With the above configuration, in the case where there is a relative positional shift between the connection terminal groups arranged on two opposing parallel sides of the electronic component, the inclined connection The inclination angle of the terminal is θ, the direction connecting the connection terminal groups on the two sides is Y, and the direction perpendicular to the Y direction (the direction of positional deviation in the terminal arrangement direction) is X, and the positional deviation of the inclined connection terminal is If the amount is x, then Y is required to accurately stack the inclined connection terminal group on the mating connection terminal group to be connected which is inclined at approximately the same angle as the connection terminal group by correcting the positional deviation amount x. The amount of movement in the direction y is determined by the relationship y=x・cot(θ), and the positioning of the connection terminal group can be done accurately and easily by simply moving the connection terminal group slightly in the Y direction over the mating terminal group to be connected. It becomes possible to do so.

[0009] By arranging the leads of the TCP in the above configuration, even if there is a relative misalignment between the connection terminals of the circuit board connected to the TCP,
As in the case of the electronic component, simply by slightly moving the TCP in the Y direction over the mating terminal to be connected, it is possible to accurately and easily align the TCP.

[0010] Furthermore, by using the TCP having the above structure as a liquid crystal display device interposed between a connection terminal of a liquid crystal display element and a connection terminal of a printed circuit board corresponding to the connection terminal, the electronic component As in the case of , it is now possible to accurately and easily align and connect terminals, lowering mounting costs and improving manufacturing efficiency, and also making it possible to support higher pin counts and narrower pitches. became.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram showing an example of TCP, FIG. 2 is a diagram showing the arrangement of only the leads in FIG. 1, and FIG. 3 is a diagram showing the arrangement of only the connection terminals between the liquid crystal display element and the printed circuit board. 4 is a diagram showing a misaligned arrangement of the leads shown in FIG. 2 and the connection terminals shown in FIG. 3, and FIG.
FIG. 6 is a diagram showing an example of a liquid crystal display device in which the TCP shown in FIG. 1 is mounted.

In FIG. 1, 1 is a tape film, and the tape film 1 includes a base film 1c made of polyimide on which a wiring pattern 1d is formed, and a multi-pin structure formed on one side of the base film 1c with an LSI chip 2 sandwiched therebetween. It consists of an input side lead 1a and a multi-pin output side lead 1b formed on the other side of the base film 1c. 3 is L to the inner lead of tape film 1
This is a TCP formed by connecting SI chip 2. Lead 1a
, 1b are arranged adjacent to each other in parallel, but in this case, as shown in the figure, the leads 1a are formed to be inclined at a predetermined angle θ with respect to the leads 1b. Next, in the arrangement of only the TCP leads shown in FIG. 2, the pitch between the leads 1a and 1b is different in an actual product, but in order to facilitate understanding of the present invention,
They are shown in correspondence with the same pitch p0. In FIG. 3, 4 is a liquid crystal display element, 4b is a connection terminal of the liquid crystal display element 4, 5 is a printed circuit board, and 5a is a connection terminal of the printed circuit board 5. Here, the connecting terminals 5a and 4b are arranged at the same pitch p0 and the same inclination angle θ so as to correspond to the leads 1a and 1b in FIG. 2, but as shown in FIG. 3, the connecting terminals 5a and 4b are , the area centers of the terminals are relatively shifted by x (mm) in the terminal arrangement direction (X direction).

FIG. 4 shows the TCP leads 1a and 1a shown in FIG.
1b and the arrangement of the connecting terminals 5a of the printed circuit board 5 and the connecting terminals 4b of the liquid crystal display element 4 shown in FIG. 3 are shown superimposed for connection to each other. In this case, since both are arranged with the same pitch p0 and the same inclination angle θ, if there is no relative positional shift, the connected terminals would completely overlap each other, but here, the connecting terminal 5a and 4b are relatively shifted by x (mm) in the terminal arrangement direction, so the x (mm) positional shift remains as is when connecting, and lead 1
Although the leads 1a and the connecting terminals 4b completely overlap each other, all the connection points between the leads 1a and the connecting terminals 5a are misaligned.

FIG. 5 shows how the TCP is moved from the misaligned connection state shown in FIG.
This figure shows a state in which the positions have been corrected by moving the lead 1b and the connecting terminal 4b and between the lead 1a and the connecting terminal 5a so that they completely overlap by eliminating the positional deviation of x (mm). . In this way, the connection terminal is formed by tilting the arrangement of the connection terminals (1a, 5a) on one side by a predetermined angle θ with respect to the arrangement of the connection terminals (1b, 4a) formed on the other side. By using an array structure,
Even if there is a relative positional deviation in the X direction between the arrangement of the connection terminals, the positional deviation in the X direction can be resolved by simply moving the TCP leads 1a and 1b in the Y direction at the terminal connection part. This makes it possible to easily and accurately position and connect.

[0015] The movement of the TCP for the position correction is easily possible by using a conventional normal TCP movement device, and there is also a difference between the movement amount y and the positional deviation amount x. has the relationship y=x·cot(θ). Here, the angle θ is not specified or limited, but as shown in FIG. 2, the pitch p between adjacent leads 1a when the angle θ is equal to the pitch p when θ=0.
It becomes shorter than 0, and the relationship between the two is p=p0・cos(θ)
becomes. From this, for example, in order to set cos(θ)>0.9, it is sufficient to satisfy the condition θ<25.8°. On the other hand, when the angle θ is made very small, for example 1° or 2°, the above-mentioned y=x・c
From the relationship ot(θ), even if the amount of deviation x is small, the amount of movement y
becomes very large. For this reason, it is desirable that the amount of movement y is not so large; for example, co
Assuming that t(θ)<10 and θ>5.7°, when the amount of deviation x is 0.1 mm, the amount of movement y will be 1.0 mm or less.

Next, FIG. 6 is a schematic diagram of a liquid crystal display device.
FIG. 2 is a diagram showing a state in which TCP3 shown in FIG. 1 is sequentially implemented. Terminal connection is performed by connecting the leads 1a arranged at an angle on one side of the TCP 3 to connection terminals 5a (not shown) arranged at an angle at the same angle on the printed circuit board 5, and at the same time connecting the leads 1a arranged at an angle on one side of the TCP 3 to the connection terminals 5a (not shown) arranged at an angle at the same angle on the printed circuit board 5. The leads 1b arranged without being inclined on the sides are connected to connection terminals 4b (not shown) arranged on the liquid crystal display element 4. This liquid crystal display device also has the same functions and effects as explained in FIGS. 1 to 5 above, so positioning work is easy and work time can be shortened, reducing mounting costs and manufacturing efficiency. Moreover, it becomes possible to cope with a large number of pins and a narrower pitch. Further, there is no need to increase the formation accuracy required for the connection terminal patterns of the liquid crystal display element 4 and the printed circuit board 5, and therefore, the effect is that low-cost liquid crystal display elements 4 and the printed circuit board 5 can be used. It also has

Although not shown, the TC shown in FIG.
In addition to liquid crystal display devices mounted with P, there are also members for connecting the input and output terminals of opposing circuit boards to each other, such as flexible panels with a large number of narrow-pitch connection terminals and inter-terminal wiring formed inside. In circuit boards, etc., the same effect as described above can be achieved by forming the connection terminals connected to one of the opposing circuit boards at a predetermined angle with respect to the connection terminals connected to the other circuit board.・It can be effective.

[0018]

As explained above, the present invention provides a connection terminal in which the arrangement of connection terminals on one side is inclined by a predetermined angle θ with respect to the arrangement of connection terminals formed on the other side. Because of the arrangement structure, even if there is a relative positional shift between the multiple-pin, narrow-pitch terminal groups to be connected, it is possible to easily and accurately position and connect them.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of a tape carrier package of the present invention.

FIG. 2 is a diagram showing an arrangement state of only the leads in FIG. 1;

FIG. 3 is a diagram showing the arrangement of only connection terminals between a liquid crystal display element and a printed circuit board.

4 is a diagram showing an arrangement state in which the leads shown in FIG. 2 and the connection terminals shown in FIG. 3 are misaligned; FIG.

FIG. 5 is a diagram showing a connection state after correcting the positional deviation in FIG. 4;

FIG. 6 is a diagram showing an example of a liquid crystal display device in which the TCP shown in FIG. 1 is mounted.

[Explanation of symbols]

1...Tape film, 1a...Lead (input side), 1b...
(Output side), 1c... Base film, 1d... Wiring pattern, 2... LSI chip, 3... Tape carrier package (TCP), 4... Liquid crystal display element, 4b... Connection terminal of liquid crystal display element, 5... Printed wiring board, 5a...Connection terminal of printed wiring board.

Claims (3)

[Claims] 1. An electronic component having two parallel opposing sides and in which a large number of connection terminals are arranged adjacent to each other in parallel on each side, wherein the connection terminals on one side are formed on the other side. 1. A connection terminal array structure for electronic components, characterized in that the connection terminals are formed at a predetermined angle with respect to the connection terminals. 2. A tape carrier package comprising a tape film on which a wiring pattern having multi-pin leads is formed, and an LSI chip mounted on the tape film via bumps of metal protruding electrodes, wherein the mounted A tape carrier package characterized in that the leads on one side that sandwich an LSI chip are formed to be inclined at a predetermined angle with respect to the leads formed on the other side. 3. A liquid crystal display device comprising the tape carrier package according to claim 2 interposed between a connection terminal of a liquid crystal display element and a connection terminal of a printed circuit board corresponding to the connection terminal.