JP2000081634A - Liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower wiring resistance and the wiring resistance of power source terminals in particular and to prevent the degradation in the image quality of a liquid crystal display panel by the blurring of input and output signals by widening the line width of the outermost end input part of semiconductor drive electrode terminals. SOLUTION: The line width of the outermost end input part of the first semiconductor drive electrode terminal 10 for supplying the power-supply voltage inputted from the outermost end input part to a semiconductor element 2 and the second semiconductor drive electrode terminal 9 for supplying the input signal from the outermost end input part to the semiconductor element is made wider than >=2 times the diameter or the length on the side of the electrodes of the semiconductor element 2 and is made wider than the line width of a panel electrode terminal 8. In addition, the line width in the outermost end input part of the first semiconductor drive electrode terminal 10 is made wider than >=1.5 times the line width of the outermost end input part of the second semiconductor drive electrode terminal 9. The power-supply voltage inputted to the semiconductor element 2 for liquid crystal drive may be stabilized, the waveform dulling of the input signals is lessened and the display grade is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a semiconductor element and a substrate, and more particularly to a face-down mounting.

[0002]

2. Description of the Related Art Conventionally, as a mounting structure of a semiconductor element and a substrate by face-down, a structure as shown in FIGS. 2A and 2B has been known. FIG. 2A is a cross-sectional view in which a semiconductor element is mounted face down on a substrate, and FIG. 2B shows a wiring example of panel electrode terminals and semiconductor drive electrode terminals on the substrate.

In FIGS. 2A and 2B, 21 is a glass substrate, 22 is a semiconductor element, 23 is a panel electrode terminal, 2
4 is a semiconductor drive electrode terminal, 25 is an electrode of a semiconductor element, 2
Reference numeral 6 denotes an external input section of the semiconductor drive electrode terminal.

A panel electrode terminal for inputting a signal for driving a liquid crystal display panel and a semiconductor drive electrode terminal for driving a semiconductor element are formed on a glass substrate and made of, for example, ITO, Cr, Ni, Ta, or a thin film formed by stacking them. .

The semiconductor element is mounted face-down on the panel electrode terminal and the semiconductor drive electrode terminal via an adhesive, and the line width of the input portion from the outside of the semiconductor drive electrode terminal is equal to that of the panel electrode terminal. The line width is substantially equal to the line width of the panel introduction part, and the line width of the input part from the outside of the semiconductor drive electrode terminal is substantially the same.

[0006]

However, the conventional liquid crystal display panel has a number of problems as apparent from FIGS. 2 (a) and 2 (b).

When a liquid crystal display panel is driven by a semiconductor element, the semiconductor element and a panel electrode terminal for inputting a signal into the liquid crystal display panel, between the semiconductor element and the semiconductor element regardless of the presence of other components or members therebetween. At least 2 between the terminal and a terminal for inputting a signal for driving the semiconductor itself.
You need some kind of connection. The connection resistance between the semiconductor element and the panel electrode terminal may be about several kΩ including the wiring resistance, but the connection resistance between the semiconductor element and a terminal for inputting a signal for driving the semiconductor itself is about 1 kΩ or less to about several tens Ω. Must be within a wide range up to:

However, in the conventional liquid crystal display panel, since the line width of the input portion from the outside of the semiconductor drive electrode terminal is substantially equal to the size of the electrode 27 of the semiconductor element, the wiring resistance of the semiconductor drive electrode terminal alone is several kΩ or more. Thus, the input signal is distorted, and the image quality of the liquid crystal display panel is degraded.

In view of the above, the present invention has been made to solve the above-mentioned drawbacks, and reduces the wiring resistance of the semiconductor drive electrode terminal, particularly the wiring resistance of the power supply terminal. An object of the present invention is to provide a liquid crystal display panel in which the image quality of the liquid crystal display is prevented from deteriorating.

[0010]

According to the present invention, there is provided a liquid crystal display panel in which a liquid crystal layer is sandwiched between two upper and lower substrates made of glass or resin. A panel electrode terminal is formed on a part of the substrate, and a power supply voltage for driving the semiconductor element, a semiconductor drive electrode terminal for inputting an input signal and the like to the semiconductor element are formed on a part of the substrate,
The semiconductor element is mounted face down on the panel electrode terminal and the semiconductor drive electrode terminal, and the line width of the outermost input portion of the semiconductor drive electrode terminal which is input from outside the liquid crystal panel is the electrode width of the semiconductor element. The line width of the power supply system input portion of the outermost input portion of the maximum diameter of the pad or the length of the side parallel to the side of the adjacent semiconductor element is 1.5 times or more the line width of the input portion of other signals. It is characterized by being wide.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a wiring example of a panel electrode terminal and a semiconductor drive electrode terminal on a substrate. In FIG. 1, reference numeral 1 denotes a glass substrate, 2 denotes a semiconductor element, 3 denotes a panel electrode terminal, 4 denotes a semiconductor drive electrode terminal, 5 denotes an electrode of the semiconductor element, and 6 denotes an external input portion of the semiconductor drive electrode terminal.

A panel electrode terminal for inputting a signal for driving a liquid crystal display panel and a semiconductor drive terminal for driving a semiconductor element are formed on a glass substrate and are formed of ITO, Cr, Ni, Ta, or a thin film formed by stacking them. You. The semiconductor element is mounted face down on the panel electrode terminal and the semiconductor drive electrode terminal, and a part of the semiconductor drive electrode terminal and the panel electrode terminal on the glass substrate is directly or indirectly connected to the semiconductor electrode. There are a large number of panel electrode terminals for directly driving the liquid crystal display panel corresponding to the number of pixels of the liquid crystal display panel, and the thickness is not so large corresponding to the pixel pitch. On the other hand, the input portion of the semiconductor drive electrode terminal is considerably wide, and its width also differs depending on the type of signal of the semiconductor drive electrode terminal. The semiconductor drive electrode terminals are power supply terminals such as V _DD , V _EE and V _SS ,
Although there are various types of signals such as timing signals and data signals, in this embodiment, the semiconductor drive electrode terminals of the power supply system are wider than those of other signals such as timing signals and data signals.

Generally, a matrix display liquid crystal display panel for a liquid crystal TV or a word processor is connected with a large number of liquid crystal driving semiconductor elements. At this time, if there is an individual difference in the signal of the semiconductor element, a difference in the shading of the displayed image of the semiconductor element for driving the liquid crystal individually occurs on the liquid crystal display panel.

When the power supply voltage input to each semiconductor element itself varies, individual differences easily occur in the liquid crystal display panel driving signal output from the semiconductor element.

For this reason, the semiconductor drive electrode terminals on the glass substrate must have low wiring resistance and the individual differences between the semiconductors must be reduced, and the importance of the power supply system terminals is greater. Therefore, in the present invention, the line width of the input portion from the outside of the semiconductor drive electrode terminal on the glass substrate in this embodiment is considerably wider than the electrode pad of the semiconductor element, and the wiring resistance is considerably low. For example, i) when the planar shape of the electrode pad of the semiconductor element is circular,
ii) When the plane shape of the electrode pad is a quadrilateral, input from the outside of the liquid crystal display panel of the semiconductor drive electrode terminal to the length of the side of the electrode pad parallel to the edge of the semiconductor element adjacent to the electrode pad. The line width of the outermost end input section is twice or more as wide as possible.

In FIG. 1, the line width 9 of the input portion from the outside of the semiconductor drive electrode terminal is 1 compared to the electrode size 8 of the semiconductor element.
And 10 are more than doubled. Further, the line width 10 of the input portion of the semiconductor drive electrode terminal from the outside of the power supply system is 1.5 times or more the line width 9 of the input portion of the semiconductor drive electrode terminal from the outside of the non-power supply system. Therefore, the respective wiring resistances are low.

[0018]

As described above, the present invention improves the display quality of the liquid crystal display panel by increasing the line width of the input portion of the semiconductor drive electrode terminal on the glass substrate, particularly the line width of the power supply system terminal. It has the effect of causing.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of wiring of electrode terminals on a glass substrate in one embodiment of the present invention.

2A is a cross-sectional view in which a conventional semiconductor element is mounted face-down on a substrate, and FIG. 2B is a diagram illustrating an example of wiring of electrode terminals on a conventional glass substrate. 1, 21 ... glass substrate 2, 22 ... semiconductor element 3, 23 ... panel electrode terminal 4, 24 ... semiconductor drive electrode terminal 5, 25 ... electrode of semiconductor element 6, 26 ... Input part from outside the semiconductor drive electrode terminal 7 ... Input part from outside the power supply system of the semiconductor drive electrode terminal 27 ... Sealing material 28 ... Liquid crystal layer 29 ... Polarizing plate 8 ... · Width of the electrode of the semiconductor element 9 ··· Wiring width of the input part from outside the power supply system of the semiconductor drive electrode terminal 10 ··· Width of the input part of the power supply system of the semiconductor drive electrode terminal from the outside

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[Procedure amendment]

[Submission date] October 27, 1999 (1999.10.
27)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

According to the present invention, there is provided a liquid crystal display panel having a liquid crystal layer sandwiched between two substrates, wherein a semiconductor element for driving a liquid crystal connected to the liquid crystal display panel is provided on the substrate. A first semiconductor drive electrode terminal for supplying a power supply voltage input from an outermost input portion to the semiconductor element, and an outermost input portion provided to the semiconductor element. A second semiconductor drive electrode terminal for supplying an input signal from the semiconductor device; and a panel electrode terminal for supplying a drive signal from the semiconductor element to the liquid crystal display panel. The second semiconductor drive electrode terminal and the panel electrode terminal are each connected to an electrode of the semiconductor element,
The line width of the outermost input portion of the first semiconductor drive electrode terminal and the second semiconductor drive electrode terminal is at least twice as large as the diameter or side length of the electrode of the semiconductor element, and the panel electrode terminal And the line width of the outermost input portion of the first semiconductor drive electrode terminal is at least 1.5 times wider than the line width of the outermost input portion of the second semiconductor drive electrode terminal. It is characterized by.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

[0018]

As described above, according to the liquid crystal display panel of the present invention, the following remarkable effects can be obtained. a) Since the line width of the outermost input portion of the semiconductor drive electrode terminal for inputting the power supply voltage and the input signal is at least twice as large as the diameter or the length of the side of the semiconductor electrode, the liquid crystal drive semiconductor element The input power supply voltage is stabilized, the waveform rounding of the input signal is reduced, and the display quality can be improved. b) In particular, the line width of the outermost input portion of the semiconductor drive electrode terminal for inputting the power supply voltage is equal to the line width of the panel electrode terminal and the outermost input portion of the semiconductor drive electrode terminal for inputting the input signal. Since the width is wider than the line width, the power supply voltage supplied to the liquid crystal driving semiconductor element can be stabilized. c) If the line width of the panel electrode terminals on which a large number of wirings are made is also widened, the area of the frame around the display area of the liquid crystal display panel becomes large. Since the width is smaller than the line width of the input portion, the frame area is not increased.

Claims (1)

[Claims] 1. A liquid crystal display panel in which a liquid crystal layer is sandwiched between two upper and lower glass or resin substrates, wherein a panel electrode terminal for inputting the liquid crystal display panel driving signal is formed on a part of the substrate. A power supply voltage for driving the semiconductor element, a semiconductor drive electrode terminal for inputting an input signal and the like to the semiconductor element are formed on a part of the substrate, and the semiconductor element is connected to the panel electrode terminal and the semiconductor drive electrode terminal. It is mounted face down on top of the above-mentioned semiconductor drive. The line width of the outermost input portion, which is input from outside the liquid crystal display panel of the pole terminal, is at least twice as large as the maximum diameter of the electrode pad of the semiconductor element or the side parallel to the side of the adjacent semiconductor element. A liquid crystal display panel characterized in that a line width of a power supply system input portion among outermost input portions of the semiconductor drive electrode terminals is 1.5 times or more larger than a line width of other signal input portions.