JP2000187238A - Liquid crystal device, its manufacture, the liquid crystal display device and electronic equipment provided with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase connection strength with an FPC substrate and an IC chip, etc., by forming a terminal part electrically connecting to an external circuit element via an adhesive member on one side substrate and forming ruggedness provided on a reflection electrode on the terminal part. SOLUTION: A lower side substrate 1b is formed so as to project to a side side than an upper side substrate 1a. Prolonged parts of data lines 4a-4m are converged, so as to come close to each other on this part, and constitute an external terminal 41 exposed to a panel outside. Then, the FPC substrate 7 loading a data line drive IC chip 6 is connected to the surface of the external terminal 41 via an ACF (anisotropic conductive sheet) 5, and the IC chip 6 is electrically connected to the data lines 4a-4m. Thus, by forming the ruggedness on the surface of the data lines 4a-4m and the external terminal 41, the substantial contact area of the adhesive incorporated in the ACF 5 is spread, and the connection strength of the FPC substrate 7 becomes high, and the substrate 7 becomes hard to peel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an external terminal of a liquid crystal panel used for a liquid crystal display device and a method of manufacturing the same, and more particularly to a reflective liquid crystal having a reflective electrode made of aluminum or the like formed on an insulating substrate. The present invention relates to a technique suitable for being applied to a liquid crystal panel for a display device, a substrate constituting the same, and a method of manufacturing the same. The present invention further relates to a technique suitable for use in an electronic device having a liquid crystal display device.

[0002]

2. Description of the Related Art A liquid crystal panel used in a liquid crystal display device or the like holds a liquid crystal between a pair of substrates, and applies an electrode or a scanning electrode for changing the direction by applying a voltage to the liquid crystal on the liquid crystal side surface of each substrate. Wirings such as lines and data lines are provided. In general, a liquid crystal panel has an FPC board (Flexib) on which a driving IC chip or IC for applying a predetermined voltage to electrodes, scanning lines, data lines, and the like formed on the board is mounted.
le Printed circuit: Flexible printed wiring board)
External terminals are provided for connection by TAB (automated tape mounting) using an ACF (anisotropic conductive sheet) or the like. Conventionally, such external terminals are often formed of the same material as a conductive layer forming a wiring or a pixel electrode formed of aluminum, ITO (Indium-Tin Oxide), or the like provided in a display unit.

[0003]

However, the external terminals made of aluminum, ITO, or the like in the conventional liquid crystal panel are flat because the surface of the aluminum layer or the ITO film is in the state as formed and is flat. It has been clarified that when such devices are connected, the connection strength is not sufficient, and there is a problem that the reliability of electronic devices incorporating such a liquid crystal panel and a driving IC is low.

An object of the present invention is to provide a structure of an external terminal of a liquid crystal panel and a method of forming the same, which can enhance the strength of connection with an FPC board, an IC chip and the like.

Another object of the present invention is to improve the reliability of electronic equipment having a built-in liquid crystal display.

[0006] Other objects and features of the present invention will become apparent in the following description.

[0007]

The liquid crystal panel according to the present invention is provided with irregularities on the surface of the external terminal. In addition, when the APC is used to connect an FPC board or an IC chip to the external terminal, the unevenness is caused by the ACF.
The height of the unevenness is made smaller than the diameter of the conductive particles contained in the. According to the above means,
Since the unevenness is formed on the surface of the external terminal, the substantial contact area of the adhesive is increased, the connection strength with the FPC board, the IC chip or the like is increased, and the external terminal is hardly peeled off. Moreover,
Since the height of the unevenness is made smaller than the diameter of the conductive particles included in the ACF, the contact resistance does not decrease due to the formation of the unevenness.

Further, the present invention provides a method for forming the irregularities, wherein in a reflective liquid crystal panel, the external terminals are formed of the same conductive layer as the reflective electrode, and simultaneously with the formation of the irregularities on the surface of the reflective electrode. Irregularities are also formed on the surface of the external terminal. In recent years, reflective liquid crystal panels that do not require a backlight to reduce power consumption have been developed.In the case of a reflective liquid crystal panel, if the surface of the reflective electrode is flat, it is difficult to see the display, and irregularities are formed on the surface of the reflective electrode. A technology has been developed to make the display easier to see by forming and irregularly reflecting the incident light, but at the same time as forming the unevenness on the surface of the reflective electrode and the surface of the external terminal, a new process can be performed. Without adding external terminals and FPC board or I
The connection strength with the C chip or the like can be increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first example in which the present invention is applied to a reflective liquid crystal panel as a liquid crystal device.
2 shows a planar layout and a cross-sectional view of the example. In addition,
FIG. 2 is a diagram showing a cross-sectional structure along the line AA in FIG.

First, the schematic structure of the liquid crystal panel of this embodiment will be described.
As shown in FIG. 2, two glass substrates 1a and 1b are provided to face each other, and are joined at predetermined intervals by sealing materials 2a and 2b. Then, T is applied between these two substrates.
N (Twisted Nematic) liquid crystal or SH (Super Homeo)
Liquid crystal such as tropic) liquid crystal is filled.

A plurality of scanning lines (or common electrode lines) 3a, 3b to 3 made of transparent electrodes such as ITO are provided on the surface of one of the two substrates 1a, 1b (upper substrate) 1a. 3n are formed parallel to each other.
On the surface of the other substrate (lower substrate) 1b, a plurality of data lines (or segment electrode lines) 4a, 4b to 4m made of a metal having high reflection efficiency such as aluminum are provided with the scanning lines 3a, 3b to 4m. 3n are formed parallel to each other along a direction intersecting with 3n.

As shown in FIG. 1, the lower substrate 1b is formed so as to protrude laterally from the upper substrate 1a, and the data lines 4a, 4b to 4m
Are converged so as to be close to each other and constitute an external terminal portion 41 exposed to the outside of the panel. The FPC board 7 on which the data line driving IC chip 6 is mounted is connected to the surface of the external terminal portion 41 via an ACF (anisotropic conductive sheet) 5, and the IC chip 6 and the data lines 4 a, 4b to 4m are electrically connected. In this embodiment, irregularities are formed on the surfaces of the data lines 4a, 4b to 4m and the external terminals 41 which are extensions thereof.

The irregularities formed on the surfaces of the data lines 4a, 4b to 4m can irregularly reflect the incident light, thereby making the display more visible than when the surface is flat. Can be. Moreover, in this embodiment, irregularities are also formed on the surface of the external terminal portion 41, and the FPC board 7 is connected to the surface of the external terminal portion 41 having the irregularity via the ACF 5.
Thereby, the substantial contact area of the adhesive contained in the ACF 5 is increased, and the connection strength of the FPC board 7 is increased,
It is difficult to peel off. Further, the data lines 4a, 4b to 4
Since the irregularities on the surface of m and the external terminal portion 41 can be formed simultaneously in the same step, the process does not become complicated.

Although not shown, the upper substrate 1a has a side adjacent to the terminal forming side of the lower substrate 1b.
The extended portions of the scanning lines 3a and 3b to 3n are converged so as to be closer to each other to form an external terminal portion 31. An FPC board on which a scanning line driving IC chip is mounted is connected to the external terminal section 31 via an ACF.
However, a structure may be provided to electrically connect the wiring between the upper substrate 1a and the lower substrate 1b so that a voltage is applied to the upper substrate 1a via the lower substrate 1b. On the liquid crystal side of the scanning lines 3a, 3b to 3n and the liquid crystal side of the data lines 4a, 4b to 4m, alignment films for aligning the liquid crystal in a predetermined direction are formed.

Although not shown, a color filter layer is provided on the liquid crystal side surface of the upper substrate 1a of the liquid crystal panel configured as described above, and a polarizing plate is provided on the surface of the upper substrate 1a opposite to the liquid crystal. At the same time, a control LSI including a power supply circuit and the like is mounted or connected to the FPC board 7 in addition to the drive circuit, thereby forming a liquid crystal display device.

FIG. 3 shows the external terminal 41 and the FP
A cross-sectional enlarged view of a connection portion with the C substrate 7 is shown. FIG.
As shown in (A), the height h of the irregularities on the surface of the external terminal portion 41 is set to be smaller (r> h) than the diameter r of the conductive particles 8 included in the ACF 5. I have.
Thereby, when the FPC board 7 is pressed against the external terminal 31, the conductive particles 8 are crushed to increase the contact area as shown in FIG. 3B, and the external terminal 31 is flat. A similar conduction state is obtained. That is, the contact resistance does not increase as compared with the case where no unevenness is formed. Specifically, the height h of the irregularities on the surface of the external terminal portion 41 is 0.5 to 0.8 μm, and the diameter r of the conductive particles 8 is 1 to 5 μm.
What should I do?

Next, a method of forming irregularities on the surface of the data line as the reflective electrode and the external terminal portion 41 will be described.

As a first method of forming irregularities on the surfaces of the data lines 4a, 4b to 4m and the external terminal portion 41, there is a method using etching. More specifically, when the data lines 4a, 4b to 4m are formed of aluminum as in the above-described embodiment, the unevenness can be formed mainly by wet etching using oxalic acid or the like. Dry etching may be used instead of wet etching.

As a second method of forming irregularities on the surfaces of the data lines 4a, 4b to 4m and the external terminals 41, as shown in FIG. 4, irregularities are previously formed on the surface of the substrate 1b. There is also a method in which an aluminum layer is formed thereon after the formation. Examples of a method for forming irregularities on the surface of the substrate 1b include wet etching using hydrofluoric acid or the like, and a blast treatment method for spraying a particulate abrasive or the like on the substrate surface to form irregularities. However, when irregularities are formed in advance on the surface of the substrate 1b and an aluminum layer is formed thereon, the thicker the aluminum layer is, the more the surface is flattened and the irregularities on the substrate surface are hardly transferred. The thickness is desirably 0.8 μm.

The first method of forming irregularities directly on the surfaces of the data lines 4a, 4b to 4m and the external terminal portion 41 is to dispose electrodes and switching elements for each pixel as well as a simple matrix type liquid crystal panel. The present invention can also be applied to an active matrix type liquid crystal panel to be provided. On the other hand, the second method of forming irregularities on the surface of the substrate 1b in advance is a simple matrix type liquid crystal panel in which data lines as reflective electrodes are formed on the surface of the substrate or relatively near the surface of the substrate. Active matrix liquid crystal panels in which a pixel electrode as a reflective electrode is formed on the surface of the substrate or relatively close to the surface of the substrate, or an active matrix having a pixel electrode made of a transparent electrode separately from the reflective electrode The present invention can be applied to a matrix type liquid crystal panel and the like.

FIG. 5 shows a second embodiment of the present invention. This embodiment is applied to a COG (chip-on-glass) type liquid crystal panel.

In the reflection type liquid crystal panel of this embodiment, as shown in FIG. 5, two glass substrates 1a and 1b are disposed to face each other and are joined at predetermined intervals by sealing materials 2a and 2b. . Then, a liquid crystal is sandwiched between these two substrates. A plurality of scanning lines (or common electrode lines) 3a made of a transparent electrode such as ITO are provided on the surface of one substrate (upper substrate) 1a of the two substrates 1a and 1b.
3b to 3n are formed parallel to each other. On the surface of the other substrate (lower substrate) 1b, a plurality of data lines (or segment electrode lines) 4a, 4b to 4m made of a metal having high reflection efficiency such as aluminum are provided with the scanning lines 3a, 3b to 4m. 3n are formed parallel to each other along a direction intersecting with 3n.

As shown in FIG. 5, the lower substrate 1b is formed so as to protrude laterally beyond the upper substrate 1a, and this portion extends the data lines 4a, 4b to 4m. The drawer terminal portions 41 'which are converged so as to be close to each other and exposed to the outside of the panel are arranged. Also,
In this embodiment, the external connection terminal portion 4 made of the same material (in this embodiment, aluminum) as the data lines 4a to 4m is provided at a predetermined distance from the lead terminal portion 41 '.
1 "is provided, and an IC chip 6 for driving a data line is connected via the ACF 5 across the lead terminal 41 'and the external connection terminal 41".
Then, the data lines 4a, 4b to 4m and the extension terminal 41 'and the external connection terminal 4
Irregularities are formed on the surface of 1 ". In addition, 61a, 6
Reference numeral 1b denotes a connection bump provided on the IC chip 6.

Since the surface of the data lines 4a, 4b to 4m has irregularities, the incident light can be irregularly reflected, so that the display can be more easily viewed than when the surface is flat. Can be. Moreover, in this embodiment, irregularities are also formed on the surfaces of the lead terminal portion 41 'and the external connection terminal portion 41 ", and the lead terminal portion 41' and the external connection terminal portion 4 having the irregularities are formed.
The IC chip 6 is connected to the 1 "surface via the ACF 5, and the IC chip 6 is electrically connected to the data lines 4a, 4b to 4m. Thereby, the adhesive contained in the ACF 5 is substantially formed. The contact area is large, the connection strength of the IC chip 6 is high, and it is difficult for the IC chip 6 to be peeled off, and the data lines 4a, 4b to 4m, the lead terminal 41 'and the external connection terminal 41 "have the same surface irregularities. Since they can be formed simultaneously in the process, the process does not become complicated.

Although not shown, the upper substrate 1a is formed so as to protrude laterally from the lower substrate 1b, and the extended portions of the scanning lines 3a, 3b to 3n are located close to each other. A converged lead terminal portion and an external connection terminal portion separated from the lead terminal portion may be provided to mount an IC chip for driving a scanning line via an ACF, or a wiring line between the upper substrate 1a and the lower substrate 1b may be provided. May be provided so as to apply a voltage to the upper substrate 1a via the lower substrate 1b. Further, the scanning lines 3a,
3b to 3n on the liquid crystal side and the data lines 4a, 4b
An alignment film for aligning the direction of the liquid crystal in a predetermined direction is formed on the surface on the liquid crystal side of about 4 m. Further, when it is necessary to electrically connect the IC chip to an external LSI or device, an external terminal similar to that shown in FIG. 2 is provided, and an FPC or a flat cable is connected to the surface via an ACF. Is done.

Next, a third embodiment of the present invention will be described with reference to FIG. The embodiment of FIG. 6 is based on the MIM (metal film-insulating film-
The present invention is applied to an active matrix type liquid crystal panel using a diode pair having a metal film structure as a switching element.

The liquid crystal panel 30 of this embodiment has a pixel electrode 11 made of Cr, an MIM (having a laminated structure of a TaW layer, a TaOx layer, and a Cr layer) 13 as a switching element for applying a voltage thereto, Data line 15 for supplying an applied voltage, lower substrate 10 having Al reflective electrode 17 provided on Cr pixel electrode 11, scanning line 21 made of transparent electrode (ITO), color filter layer 22
And an incident side glass substrate (upper substrate) 20 having a black mask 23 and the like are arranged at an appropriate interval,
A liquid crystal 32 such as a TN-type liquid crystal or an SH-type liquid crystal is filled in a gap whose periphery is sealed with a sealant 31 to form a liquid crystal panel 30. When used as a display device, a polarizing plate is disposed on the surface of the glass substrate 20 on the incident side opposite to the liquid crystal (the upper surface in FIG. 6).

In the liquid crystal panel of this embodiment, the data lines 15 formed on the liquid crystal side surface of the lower substrate 10 are shown in FIG.
One direction of the substrate in the same manner as (the direction perpendicular to the paper surface in FIG. 6)
And the scanning lines 21 formed on the liquid crystal side surface of the glass substrate (upper substrate) 20 on the incident side are substantially parallel to each other along the direction intersecting with the data lines. Will be arranged. Further, the Al reflective electrode 1
The surface of 7 has irregularities for irregularly reflecting incident light. The reason why the reflective electrode 17 made of an Al layer is provided on the pixel electrode 11 made of a Cr layer is that aluminum has a higher reflectance than chromium and that C
This is because, if the r layer is omitted and only the Al layer is used, the surface of aluminum is easily oxidized, and it is difficult to obtain desired characteristics.

Further, in this embodiment, at least the element-side substrate (lower substrate) 10 is formed so as to protrude laterally from the upper substrate 20, and this portion is shown in FIGS. In the same manner as in the embodiment, the extended portions of the data lines 15 are converged so as to approach each other to form an external terminal portion 41 exposed to the outside of the panel. An ACF 5 is provided on the surface of the external terminal portion 41. The FPC board 7 on which the data line driving IC chip 6 is mounted is connected via the FPC board 7. In the liquid crystal panel shown in FIG.
The external terminal portion 41 is not shown in the drawing because it is provided at the end of the substrate in a direction perpendicular to the paper surface.

In this embodiment, a lead line portion which is an extension of the data line 15 and the external terminal portion are connected to the data line 1.
5 has a laminated structure in which an aluminum layer constituting the reflective electrode 17 is formed on a Cr layer constituting the reflective electrode 17, and the surface of the upper aluminum layer has the same structure as the formation of irregularities on the surface of the reflective electrode 17. The unevenness formed in the process is provided. Also in this case, in the same manner as described with reference to FIG. 4, the unevenness is previously formed on the surface of the substrate, and the unevenness is transferred to the surface of the reflective electrode 17 made of an aluminum layer formed thereon and the surface of the external terminal. Can be done.

This makes it easy to see the display because the incident light is irregularly reflected on the surface of the reflective electrode, while the contact area of the adhesive contained in the ACF becomes large at the external terminal, and the contact area between the reflective electrode and the FPC board or IC chip becomes large. The connection strength is increased, and it is difficult to peel off. In addition, since the irregularities on the surfaces of the reflective electrode and the external terminal can be formed simultaneously in the same step, the process does not become complicated.

In the embodiment shown in FIG. 6, the reflective electrode 17 made of the Al layer is provided on the pixel electrode 11 made of the Cr layer. However, the Cr pixel electrode 11 is omitted, and the Al electrode is directly reflected on the surface of the substrate. The electrode 17 may be formed. by this,
In the embodiment in which the unevenness is formed in advance on the substrate surface and the unevenness is transferred to the reflective electrode, the state of forming the unevenness is good.

FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the reflection electrodes 42a to 42a
Transparent data lines 4a to 4m made of ITO are provided on 2m via an insulating film 51. In this embodiment, the external terminals 41 for inputting signals to be applied to the data lines 4a to 4m are formed of the same aluminum layer as the reflective electrodes, and are provided on the surfaces of the reflective electrodes 42a to 42m and the surfaces of the external terminals 41. Have the same irregularities. The data lines 4a to 4m are connected to the external terminals 41 at openings (contact holes) provided in the insulating film 51.

Also in this embodiment, the reflection electrodes 42a to 42a
Since the irregularities are formed on the surface of 42 m, the display is easy to see, while the FPC board connected to the external terminal 41 or the IPC
In a C chip or the like, the substantial contact area of the adhesive contained in the ACF is increased, the connection strength is increased, and the chip is hardly peeled off. Also, the reflection electrodes 42a to 42m and the external terminals 41
Since the surface irregularities can be formed simultaneously in the same step, the process does not become complicated.

Moreover, a transparent data line 4 made of ITO is used.
By providing the Al reflective electrodes 42a to 42m slightly smaller in width than the data lines 4a to 4m separately below the data lines 4a to 4m, the display quality of the liquid crystal display device can be improved. That is, when the alignment of the liquid crystal is controlled by the data lines 4a to 4m also serving as the reflective electrode as in the first embodiment (FIG. 2), the electric field is not parallel at the edge portion of the electrode and the alignment of the liquid crystal molecules is not achieved. Distortion may cause display quality to be degraded. However, by providing the Al reflective electrodes 42a to 42m slightly narrower than the data lines 4a to 4m below the data lines 4a to 4m, There is an advantage that image quality is improved because incident light can be reflected in a portion where there is no disturbance. Also in this embodiment, when used as a display device, the polarizing plate 3 is provided on the surface (the upper surface in the figure) of the substrate 1a on the incident side opposite to the liquid crystal.
3 are joined.

FIG. 8 shows a fifth embodiment of the present invention. This embodiment is applied to a transflective liquid crystal panel.
Its structure is almost the same as that of FIG.
Separately from m, there are provided Al reflective electrodes 42a to 42m slightly narrower than the data lines 4a to 4m below the data lines 4a to 4m, and irregularities are formed on the surfaces of the reflective electrodes 42a to 42m for irregular reflection of incident light. In addition, irregularities similar to the surfaces of the reflective electrodes 42a to 42m are also formed on the surface of the external terminal 41. The liquid crystal panel of FIG. 8 is different from the liquid crystal panel of FIG. 7 in that a plurality of through holes 43 are formed in the reflective electrodes 42a to 42m, and the backlight 50 is disposed on the side opposite to the incident side of the liquid crystal panel. That is the point. As described above, the through hole is formed in the reflective electrode and the backlight is arranged. When the backlight is turned on when the incident light is small, the light is transmitted to the liquid crystal through the through hole 43 formed in the reflective electrodes 42a to 42m. There is an advantage that the amount of emitted light is increased by leaking to the side to make the display easier to see.

Also in this embodiment, while the display is easy to see, the FPC board and the IC chip connected to the external terminals have a substantial contact area of the adhesive contained in the ACF and the connection strength is increased. The effect that peeling becomes difficult is obtained. In addition, since the irregularities on the surface of the reflective electrode and the external terminal can be formed simultaneously in the same process,
The process is not complicated.

FIG. 9 shows a configuration example in which the liquid crystal panel of the above embodiment is applied as a display device of a portable telephone 200 or a portable information terminal 300.

In FIG. 9A, reference numeral 201 denotes a CP inside.
A body incorporating a LIS such as a U or a memory, a power supply device, a speaker, etc., 202 is a cover also serving as an audio input unit rotatably mounted on the body 201, and 203 is a liquid crystal display using the liquid crystal panel of the above embodiment. The device is mounted such that a display surface (incident surface) comes to the inner surface of the main body 201.

In FIG. 9B, reference numeral 301 denotes a CP inside.
LIS such as U and memory, body with built-in power supply, etc.
302, a key input device provided on the upper surface of the main body 301;
Reference numeral 303 denotes a liquid crystal display device using the liquid crystal panel of the above embodiment, which is mounted so that a display surface (incident surface) comes to an inner surface of a lid portion rotatably attached to the main body 301.

In an electronic apparatus using the liquid crystal panel of the above embodiment as a display device, a backlight is not required and power consumption is low, so that it can be driven for a long time by a battery and irregularities are formed on the surface of the reflective electrode. Therefore, there is an advantage that the display contents are easy to see, and the connection between the liquid crystal panel and the semiconductor integrated circuit chip or the FPC board is hard to be separated, so that the reliability and durability are excellent.

The liquid crystal panel to which the present invention is applied can be used not only as the portable information terminal as described above, but also as a portable electronic device such as a mobile phone or a display device of a laptop or desktop personal computer. The present invention can also be used for a projection display device such as a video projector using a panel as a light valve.

[0043]

As described above, in the liquid crystal device according to the first aspect, the liquid crystal is sandwiched between a pair of substrates, and a reflection electrode having irregularities is formed on the liquid crystal side surface of one of the substrates. A liquid crystal device, wherein the one substrate has a terminal portion electrically connected to an external circuit element via an adhesive member, and the terminal portion has irregularities provided on the reflective electrode. Since the same irregularities are formed, the incident light is irregularly reflected by the irregularities on the surface of the reflective electrode, so that the display is easy to see, and the substantial contact area of the adhesive is increased, the connection strength is increased, and the peeling is difficult. This has the effect.

A liquid crystal device according to a second aspect of the present invention includes an external circuit element connected via the adhesive member, wherein the adhesive member is an anisotropic conductive adhesive member including an adhesive material and conductive particles. Since the particle size of the conductive particles is larger than the height of the unevenness provided on the reflective electrode and the height of the unevenness provided on the terminal portion, the contact resistance does not decrease due to the formation of the unevenness. effective.

In the liquid crystal device according to the third aspect, the external circuit element is a semiconductor integrated circuit chip, and the terminal portion includes an input terminal connected to the semiconductor integrated circuit chip. There is an effect that the semiconductor integrated circuit chip can be directly mounted on the substrate, and peeling of the semiconductor integrated circuit chip can be prevented.

According to a fourth aspect of the present invention, the external circuit element is an FPC board on which a semiconductor integrated circuit chip is mounted, and the terminal portion includes an input terminal connected to the semiconductor integrated circuit chip. This has the effect that the peeling of the FPC board can be prevented.

According to a fifth aspect of the present invention, in the liquid crystal device, the reflective electrode also serves as a data line or a segment electrode line, a signal for driving the liquid crystal is applied, and the terminal portion is made of the same material as the reflective electrode. Therefore, the terminal portion and the reflective electrode can be formed at the same time, and the unevenness can be formed by movement, so that there is an effect that the manufacturing process is simplified.

According to a sixth aspect of the present invention, in the liquid crystal device, an insulating layer and a transparent electrode are formed on the reflective electrode, a signal for driving the liquid crystal is applied to the transparent electrode, and the terminal is connected to the reflective electrode. Since it is made of the same material as above, there is an effect that the display quality can be improved when applied to a liquid crystal display device.

In the liquid crystal device of the present invention, the unevenness of the reflective electrode and the terminal portion is transferred by forming the reflective electrode and the terminal portion on the one substrate provided with the unevenness on the surface in advance. Since it is formed, the process of forming the irregularities is performed before the reflective electrode, so that there is an effect that deterioration of characteristics is reduced.

In the liquid crystal device according to the eighth aspect, since the reflection electrode and the terminal portion are made of an aluminum layer, there is an effect that the reflection efficiency can be improved.

Claim 9 is Claim 1, 2, 3, 4, 5,
Since the liquid crystal display device includes the liquid crystal device described in 6, 7, or 8, and a polarizing plate disposed on a side opposite to the liquid crystal of the incident side substrate of the liquid crystal device, the display is easy to see and has high reliability. There is an effect that a liquid crystal display device can be realized.

According to a tenth aspect of the present invention, in the liquid crystal display device, a liquid crystal is sandwiched between a pair of substrates, and a plurality of reflective electrodes are formed in a matrix on a surface of one of the substrates on a liquid crystal side. A voltage can be applied via a data line and a switching element, an illuminating device is arranged on the one substrate opposite to the liquid crystal, and a polarizing plate is arranged on the other substrate opposite to the liquid crystal. Since a terminal portion electrically connected to an external circuit element via an adhesive member is formed, and the terminal portion has unevenness equivalent to the unevenness provided on the reflective electrode, the There is an effect that it is possible to obtain a liquid crystal display device in which a substantial contact area is widened, connection strength is increased, peeling is difficult, and irregularities can be easily formed in the terminal portion.

In the liquid crystal display device according to the eleventh aspect, a liquid crystal is sandwiched between a pair of substrates, and a semi-transmissive reflective electrode having irregularities is formed on a liquid crystal side surface of one of the substrates. A lighting device is arranged on the side opposite to the liquid crystal, and a polarizing plate is arranged on the other side of the substrate opposite to the liquid crystal, and a terminal portion electrically connected to an external circuit element via an adhesive member is provided. Since the terminal portions are formed with concavities and convexities equivalent to the concavities and convexities provided on the transflective electrode, the substantial contact area of the adhesive is increased, the connection strength is increased, and the terminal portion is hardly peeled off. In addition, the liquid crystal display device having the transflective electrode and the lighting device has an effect that a liquid crystal display device in which a display can be easily viewed even in a dark place can be obtained.

In the liquid crystal display device according to the twelfth aspect, since the reflection electrode and the terminal portion are made of an aluminum layer, the reflection efficiency can be improved, thereby realizing a liquid crystal display device which is easy to view and has high reliability. This has the effect.

The electronic device according to claim 13 is the electronic device according to claims 9 and 10
Or the liquid crystal display device described in 12 above, which eliminates the need for a backlight and consumes little power, so that it can be driven for a long time by a battery, and that the display contents are easy to see due to the unevenness formed on the reflective electrode surface. In addition, since the connection between the liquid crystal panel and the semiconductor integrated circuit chip or the FPC board is difficult to separate, there is an effect that an electronic device having excellent reliability and durability can be obtained.

According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a liquid crystal device, wherein a liquid crystal is sandwiched between a pair of substrates, and a reflective electrode having irregularities is provided on a liquid crystal side surface of one of the substrates. In the method for manufacturing a liquid crystal device, in which a terminal portion electrically connected to an external circuit element via an adhesive member is formed on the substrate, the terminal portion and the reflective electrode are formed of the same material in the same step. In addition, since the unevenness of the terminal portion and the unevenness of the reflective electrode are formed in the same step, there is an effect that the manufacturing process is simplified.

According to a fifteenth aspect of the present invention, in the method of manufacturing a liquid crystal device, a liquid crystal is sandwiched between a pair of substrates, and a reflection electrode is provided on a liquid crystal side surface of one of the substrates, and the one substrate has a reflection electrode. In a method for manufacturing a liquid crystal device in which a terminal portion that is electrically connected to an external circuit element via an adhesive member is formed, the surface of the one substrate on the liquid crystal side is formed with irregularities. The terminal portion and the reflective electrode are formed of the same material in the same process, and the irregularities formed on the liquid crystal side surface of the one substrate are transferred to the terminal portion and the reflective electrode. Since the process is performed before the reflective electrode, there is an effect that deterioration of characteristics is reduced and a manufacturing process is simplified.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a liquid crystal panel to which the present invention is applied.

FIG. 2 is a sectional view of one embodiment of a liquid crystal panel to which the present invention is applied.

FIG. 3 shows an external terminal and an FP in the liquid crystal panel of the embodiment.
The principal part expanded sectional view which shows the connection with C board.

FIG. 4 is a cross-sectional view showing another embodiment of a method of forming irregularities on a reflective electrode and an external terminal portion.

FIG. 5 is a sectional view showing an embodiment in which the present invention is applied to a COG type liquid crystal panel.

FIG. 6 is a sectional view showing an embodiment in which the present invention is applied to an active matrix type liquid crystal panel using a MIM as a switching element.

FIG. 7 is a cross-sectional view showing an embodiment in which the present invention is applied to a reflection type liquid crystal panel in which a reflection electrode is provided separately below a data line made of ITO.

FIG. 8 is a cross-sectional view showing an embodiment in which the present invention is applied to a transflective liquid crystal panel in which a reflective electrode is provided separately below a data line made of ITO.

FIG. 9 is a perspective view showing a schematic configuration of a portable telephone and a portable information terminal as examples of electronic equipment to which the liquid crystal panel of the embodiment is applied as a display device.

[Explanation of symbols]

 1a, 1b Glass substrate 2a, 2b Seal material 3a-3n Scanning line 4a-4m Data line 5 ACF (anisotropic conductive sheet) 6 IC chip 7 FPC substrate 8 Conductive particles 41 External terminal unit 10 Lower glass substrate 11 Pixel electrode DESCRIPTION OF SYMBOLS 13 MIM element 15 Data line 17 Reflection electrode 20 Incident side glass substrate 21 Scanning line 22 Color filter layer 23 Black mask 30 Liquid crystal panel 31 Sealing material 32 Liquid crystal 33 Polarizing plate 200 Cellular phone 300 Portable information terminal 203, 303 Liquid crystal display

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H091 FA16Y FB08 FC02 FC14 FC26 FD06 FD23 GA13 LA12 2H092 GA49 GA50 GA51 GA55 HA05 JA03 JB12 KA16 KA18 KB14 KB23 MA05 MA13 MA17 MA35 MA37 NA15 NA25 NA27 NA28 PA06

Claims (15)

[Claims] 1. A liquid crystal device in which a liquid crystal is sandwiched between a pair of substrates, and a reflective electrode having irregularities is formed on a liquid crystal side surface of one of the substrates. A liquid crystal device, wherein a terminal portion electrically connected to a circuit element via an adhesive member is formed, and the terminal portion is formed with unevenness equivalent to the unevenness provided on the reflective electrode. . 2. The liquid crystal device according to claim 1, wherein the liquid crystal device includes an external circuit element connected via the adhesive member, and the adhesive member includes an adhesive material and conductive particles. A liquid crystal device, being an anisotropic conductive adhesive member, wherein the particle size of the conductive particles is larger than the height of the unevenness provided on the reflective electrode and the height of the unevenness provided on the terminal portion. 3. The liquid crystal device according to claim 2, wherein the external circuit element is a semiconductor integrated circuit chip, and the terminal unit includes an input terminal connected to the semiconductor integrated circuit chip. Liquid crystal device. 4. The liquid crystal device according to claim 2, wherein said external circuit element is an FPC board on which a semiconductor integrated circuit chip is mounted, and said terminal portion is an input terminal connected to said semiconductor integrated circuit chip. A liquid crystal device comprising: 5. The liquid crystal device according to claim 1, wherein the reflective electrode doubles as a data line or a segment electrode line, and a signal for driving the liquid crystal is applied to the reflective electrode.
The liquid crystal device, wherein the terminal portion is made of the same material as the reflective electrode. 6. The liquid crystal device according to claim 1, wherein an insulating layer and a transparent electrode are formed on the reflective electrode,
A signal for driving the liquid crystal is applied to the transparent electrode, and the terminal portion is made of the same material as the reflective electrode. 7. The liquid crystal device according to claim 1, wherein the unevenness of the reflective electrode and the terminal portion is such that the reflective electrode and the terminal portion are provided on the one substrate having a surface provided with unevenness in advance. A liquid crystal device characterized by being formed by transfer by being formed. 8. The method according to claim 1, wherein the reflection electrode and the terminal portion are made of an aluminum layer.
8. The liquid crystal device according to 4, 5, 6, or 7. 9. The liquid crystal device according to claim 1, 2, 3, or 8, and a polarizing plate disposed on an incident side substrate of the liquid crystal device on a side opposite to the liquid crystal. A liquid crystal display device comprising: 10. A liquid crystal is interposed between a pair of substrates, and a plurality of reflective electrodes are formed in a matrix on a liquid crystal side surface of one of the substrates, and the reflective electrodes are provided with data lines and switching elements. A voltage can be applied through the first substrate, and a lighting device is provided on a side of the one substrate opposite to the liquid crystal,
A liquid crystal display device in which a polarizing plate is disposed on the other substrate on the side opposite to the liquid crystal, and a terminal portion electrically connected to an external circuit element via an adhesive member is formed. A liquid crystal display device having unevenness equivalent to the unevenness provided on the reflective electrode. 11. A liquid crystal sandwiched between a pair of substrates, a semi-transmissive reflective electrode having irregularities formed on a liquid crystal side surface of one of the substrates, and a side of the one substrate opposite to the liquid crystal. Is a liquid crystal display device in which a polarizing plate is arranged on the other substrate on the side opposite to the liquid crystal, and a terminal portion electrically connected to an external circuit element via an adhesive member is formed. A liquid crystal display device, wherein the terminal portion is formed with unevenness equivalent to the unevenness provided on the transflective electrode. 12. The liquid crystal display device according to claim 10, wherein said reflection electrode and said terminal portion are made of an aluminum layer. 13. An electronic apparatus comprising the liquid crystal display device according to claim 9. 14. A liquid crystal is sandwiched between a pair of substrates, a reflection electrode having irregularities is provided on a liquid crystal side surface of one of the substrates, and the one substrate has an external circuit element and In a method for manufacturing a liquid crystal device in which a terminal portion electrically connected via an adhesive member is formed, the terminal portion and the reflective electrode are formed of the same material in the same process, and the unevenness of the terminal portion and A method for manufacturing a liquid crystal device, wherein the unevenness of a reflective electrode is formed in the same step. 15. A liquid crystal is interposed between a pair of substrates, a reflective electrode is provided on a liquid crystal side surface of one of the substrates, and an external circuit element and an adhesive member are provided on the one substrate. In a method for manufacturing a liquid crystal device having a terminal portion electrically connected to the substrate, unevenness is formed on a surface of the one substrate on a liquid crystal side, and the terminal portion and the reflective electrode are made of the same material. Wherein the unevenness formed on the surface of the one substrate on the liquid crystal side is transferred to the terminal portion and the reflective electrode.