JP3281176B2 - Matrix display device and method for repairing disconnection thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix type display device and a method for repairing a disconnection thereof.

[0002]

2. Description of the Related Art In a matrix type display device, a display material such as a liquid crystal is usually sandwiched between two opposing substrates, and one of the substrates has a plurality of signal wirings and scanning wirings in a column direction and a row direction, respectively. Pixel electrodes and switching elements such as transistors for selectively applying a signal voltage to the pixel electrodes are arranged in a matrix at each intersection of the signal wiring and the scanning wiring. The element is connected to the signal wiring and the scanning wiring, and is configured to selectively apply a signal voltage to the display material.

When a disconnection occurs in a scanning wiring or a signal wiring, a signal voltage is input from one end of the scanning wiring or the signal wiring and the other end is open. The signal voltage is not transmitted, and a linear defect occurs. Methods for repairing such defects include, for example,
This is disclosed in JP-A-4-42215.

FIGS. 5 and 6 are plan views of a conventional matrix type display device.
Issue. In the figure, 1 is a matrix substrate, 2 is a scanning wiring (Y1, Y2) arranged in parallel in the row direction.
, Yn-1, Yn) and 3 are signal wirings (X1, X2, X3,..., Xm-1, X) arranged in parallel in the column direction.
m), 4 is a signal pad connected to one end of the scanning wiring 2 and one end of the signal wiring 3, 6 is surrounding the outer periphery of the display unit 5 and formed with the scanning wiring 2 and the signal wiring 3 via an insulating film. Repair wiring.

As shown in FIG. 6, the matrix type display device constructed as described above is supplied from the signal pad 4 when Xh of the signal wiring 3 is disconnected between b and d. The signal voltage is not supplied between cd and a line defect occurs. Then, the insulating film at the intersections a and c between Xh and the repair wiring 6 is broken by a laser or the like to electrically connect Xh and the repair wiring 6, and then a gap g between Xh and the adjacent Xh + 1 is obtained. And h, the repair wiring 6 is cut by a laser or the like to form a detour X-a-f-e-c-d of Xh-1 so that a signal voltage is supplied and a linear defect is repaired. can do.

However, when the number of scanning lines increases due to the high definition or large screen, the number of intersections between the repair wiring 6, the scanning wiring 2 and the signal wiring 3 increases, and the intersections occur at these intersections. There is a problem that the parasitic capacitance increases and the display quality deteriorates due to a signal delay or a decrease in signal voltage.

Further, as shown in FIG. 7, bd, i-
When a disconnection occurs between j and ef, there is a problem that the repair between ij cannot be performed even if the repair between b and d can be performed.

FIG. 8 is a plan view showing a conventional method for repairing a linear defect by suppressing the increase in the parasitic capacitance.
This is disclosed in JP-A-2-12333. As shown in the figure, a semiconductor integrated circuit 33 for supplying a drive signal from one end of a scanning line and a signal line of the display unit 5 is provided on a matrix substrate 1, and a connection pad 56 is provided outside the semiconductor integrated circuit 33.
The repairing wiring 47 having the wiring pattern 52 is disposed, and the connection pads 49 and 50 formed on the scanning wiring or the signal wiring and the connection pad 56 of the repairing wiring 47 are wire-bonded 52.
The repair wiring 47 is arranged outside the semiconductor integrated circuit 33 to eliminate the intersection with the scanning line and the signal line.

However, since it is not known which wiring is disconnected in the process of forming each wiring, it is necessary to provide connection pads for all scanning wirings and signal wirings. For this reason, the size of the connection pads 49 and 50 is about 100 μm square, and especially several tens μm square in a high-definition matrix display device, which makes connection technology such as wire bonding difficult and makes the repair wiring 47 It becomes necessary to reduce the diameter, and the matrix-type display device of FIG. 8 described above causes a reduction in reliability and yield.

In addition, the repair wiring 47 is formed of the semiconductor integrated circuit 3.
3, the matrix substrate 1 becomes large, and therefore, the outer shape of the matrix type display device is also enlarged.
This was a factor that hindered portability.

[0011]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, suppresses an increase in parasitic capacitance without hindering portability, makes it possible to repair a linear defect, and improves reliability. The purpose is to improve performance and yield.

[0012]

Means for Solving the Problems The matrices according to the present invention
Matrix type display device is a matrix substrate having scanning wiring and signal wiring and a display portion arranged in a matrix,
A counter substrate opposed to the matrix substrate, the matrix display device having a display material sandwiched between the Matrix Li click <br/> scan substrate and the counter substrate, for the scanning lines and the signal on the matrix substrate A first repair wiring is formed via the wiring and the insulating film, and the first repair wiring is formed with the display material of the counter substrate.
Monodea the second repair wiring is disposed on a surface on the side in contact
You .

The matrix type display device according to the present invention
The disconnection repair method uses scanning wiring arranged in a matrix.
Substrate with signal wiring and display section, and
Counter substrate facing the matrix substrate, the matrix described above
Display material sandwiched between the substrate and the counter substrate;
Scan wiring and signal wiring and insulating film
Repair wiring formed through the matrix substrate
And a second repair wiring disposed outside the plate.
Rix type display device, the first repair wiring and scanning
Break the insulating film at the intersection with the wiring or signal wiring
The first repair wiring and the scanning wiring or signal wiring are connected to each other.
Electrically connected, and the first repair on both sides including the connection portion
Cut the restoration wiring, and connect the connection portion and the second restoration wiring.
It is designed to be electrically connected.

Further , the second repair wiring is provided on the opposite substrate.
It is arranged.

Further , a second repair is provided on the matrix substrate.
Multiple connection terminals for electrical connection with the return wiring
It is provided.

Further , scanning arrangements arranged in a matrix are provided.
A matrix substrate having lines and signal wiring and a display portion,
The counter substrate facing the matrix substrate, the matrix
Display material sandwiched between the substrate and the opposing substrate.
Scanning wiring and signal wiring and insulating film
Repair wiring formed through the matrix, the matrix
A second repair wiring provided outside the substrate,
Formed on the substrate and on the insulating film
Electrically connected to the first repair wiring via the hole
A matrix type display device having connection terminals;
Intersection of repair wiring 1 and scanning wiring or signal wiring 1
The first repair wiring and the scanning wiring are broken by breaking the insulating film of the portion.
Wire or signal wiring, and connect this connection
Cutting the first repair wiring on both sides including the connection end
And the second repair wiring are electrically connected to each other.
Things.

[0017]

[0018]

According to matrix display device of the present invention, Mato
The first repair line and the scanning lines or signal lines provided in Rikusu substrate electrically connected, furthermore, the table of the counter substrate
The disconnection can be repaired by electrically connecting the second repair wiring provided on the surface on the display material side, and the second repair wiring has no intersection and the parasitic capacitance is reduced. , While suppressing the deterioration of display quality,
Since the second repair wiring is provided on the counter substrate ,
There is no need to increase the size of the matrix substrate, and there is no need to reduce the diameter of the second repair wiring. This facilitates connection, and improves reliability and yield. The present invention
According to the method for repairing the disconnection of the trix-type display device, the first repair
Electrical connection between return wiring and scanning wiring or signal wiring
Further, the first repair wiring and the matrix substrate
The second repair wiring provided outside is electrically connected to the second repair wiring.
The wire break can be repaired by performing
The repair wiring has no intersections and reduces parasitic capacitance.
Display quality can be suppressed, and
The above-mentioned second repair wiring is provided outside the liquefied board.
This eliminates the need to increase the size of the matrix substrate.
It is not necessary to make the second repair wiring fine,
And reliability and yield are improved.

Further, since the second repair wiring provided on the counter substrate utilizing a space above the opposing substrate, while reducing the outer shape of the matrix substrate, compact a matrix type display device can be disconnected repair Things.

Further, since the plurality of connection terminals for connecting the second repair line and electrically is provided, it may correspond to a plurality of line disconnection recovery.

Further, the electrical connection between the connection terminal and the first repair line, by performing via through holes provided in the insulating film, is possible not to protrude the connection from the surface of the matrix substrate it can.

[0022]

【Example】

Embodiment 1 FIG. FIG. 1 is a plan view showing an embodiment of a matrix type display device according to the present invention, and FIG. 2 is a partially enlarged sectional view of FIG. As shown in the figure, on the matrix substrate 1,
A scanning wiring (Y1, Y2, Y3,..., Yn-1, Yn) 2 made of, for example, Cr (chromium) parallel to the row direction, and insulated from the scanning wiring 2 and parallel to the column direction, for example. , Al
(Aluminum) signal wiring (X1, X2, X
, Xj... Xk-1, Xk,... Xm-1, Xm) 3, the scanning wiring 2 and the signal pad 4 connected to one end of the signal wiring 3 and the outer periphery of the display unit 5 and the scanning wiring. 2 and the first repair wiring 6, 1 insulated from the signal wiring 3 by an insulating film.
A connection terminal 8 is formed for each signal wiring of the group, and a second repair wiring 7 separately formed outside the matrix substrate 1 is provided. The first and second repair wirings 6, 7
Is formed using a material having good conductivity such as Al and Cr.

FIG. 2 is a plan view for explaining a repair method when a disconnection occurs in the configuration of FIG. As shown in the figure, a disconnection (gh) is made to xj of the signal wiring 3.
Occurs, first, several points of laser having a diameter of about 5 to 10 μm are irradiated to intersections a and f between Xj and the first repair wiring 6, and insulation between Xj and the first repair wiring 6 is obtained. The film is broken, and Xj and the first repair wiring 6 are electrically connected.
FIG. 3 is a cross-sectional view showing a state in which the insulating film is destroyed by the laser irradiation, and Xj and the first repair wiring 6 are electrically connected.

Next, after the b and e near Xj of the first repair wiring 6 are electrically connected to the connection terminals 8 near each by a method such as wire bonding, the i of the first repair wiring 6 is connected. , J, k and l are cut by a method such as laser irradiation.

Furthermore, by electrically connecting the connection terminals 8 formed on the matrix substrate and the second repair wiring 7 provided outside the matrix substrate, h → a →
b → connection terminal 8 → second restoration wiring 7 → connection terminal 8 → e →
A bypass path of f → g is formed, and a signal voltage is also supplied to the tip of the disconnection point.

According to the matrix type display device having the above structure, the first repair wiring 6 is electrically connected to the scanning wiring 2 or the signal wiring 3, and the second repair wiring 6 is provided outside the matrix substrate 1. The disconnection can be repaired by electrically connecting the second repair wiring 7 and the second repair wiring 7 has no intersection and the parasitic capacitance is reduced, so that the deterioration of the display quality can be suppressed. In addition, since the second repair wiring 7 is provided outside the matrix substrate 1, there is no need to increase the size of the matrix substrate 1 and the second repair wiring 7 does not need to have a fine diameter, so that connection is easy. And improve reliability and yield.

Since a plurality of connection terminals 8 are formed, a plurality of disconnections can be handled.

[0028] The electric connection between the first repair wiring 6 and the connection terminal 8, a through hole provided in the insulating film, by performing through the through hole, so as not to protrude from the surface of the matrix substrate as well as, the technical and reliability problems in the wire bonding between the first repair line can be solved.

Embodiment 2 FIG. FIG. 4 is a plan view showing another embodiment of the matrix type display device according to the present invention. In the figure, 1 is a matrix substrate, and 9 is a counter substrate. On the matrix substrate 1, similarly to the first embodiment, the scanning wiring 2, the signal wiring 3, the signal pad 4, the first repair wiring 6, and the b and e of the first repair wiring 6 are electrically connected. Is formed on the counter substrate 9, and a second connection terminal 10 facing the connection terminal 8 and a second repair wiring 7 electrically connected to the second connection terminal 10 are arranged on the counter substrate 9. . Second connection terminal 1
The zero and second repair wires 7 are provided on the outer peripheral portion of the common electrode 11 and are insulated from a common electrode wire (not shown) for supplying a voltage to the common electrode 11.

As shown in FIG. 4, when a gh disconnection occurs in X1 of the signal wiring 3, the insulating film at the intersections a and f between X1 and the first repair wiring 6 is formed by laser. It is destroyed by irradiation or the like to electrically connect X1 to the first repair wiring 6. Next, the first repairing wire 6 is cut by a method such as laser irradiation at the positions of l and k between X1 and X2 and i and j between b and e, so that the first repairing wiring 6 faces the connection terminal 8. It is repaired by abutting the two connection terminals 10 via a conductive paste or the like.

According to the above matrix type display device, the second
Since the repair wiring 7 is provided on the counter substrate to utilize the space of the counter substrate, the outer shape of the matrix substrate can be reduced, and the matrix display device can be repaired by disconnection and can be made compact.

[0032]

According to matrix display device of the present invention according to the present invention, electrically connecting the first repair line and the scanning lines or signal lines provided on the matrix substrate and the opposing
Disconnection can be repaired by electrically connecting the second repair wiring provided on the surface of the substrate on the display material side, and the second repair wiring has no intersection and has a reduced parasitic capacitance. Therefore, a decrease in display quality can be suppressed , and the second repair wiring is provided on the counter substrate, so that it is not necessary to increase the size of the matrix substrate, and the second repair wiring can be reduced in size. It is not necessary to make diameter,
Connection is easy, and reliability and yield are improved. Book
According to the method for repairing disconnection of a matrix display device of the invention,
The first repair wiring and the scanning wiring or the signal wiring are electrically connected.
And the first repair wiring and the matrix
Electrical connection with the second repair wiring provided outside the
Disconnection can be repaired by connecting to the
The second repair wiring has no intersection and the parasitic capacitance is reduced.
Therefore, the display quality can be prevented from deteriorating,
The second repair wiring is provided outside the matrix substrate.
Digitization eliminates the need to increase the size of the matrix substrate
It is not necessary to make the second repair wiring a fine diameter.
And easy to connect, improving reliability and yield
You.

Further, since the second repair wiring provided on the counter substrate utilizing a space above the opposing substrate, while reducing the outer shape of the matrix substrate, compact a matrix type display device can be disconnected repair Things.

Further , it is electrically connected to the second repair wiring.
A plurality of connection terminals for repairing a plurality of disconnections.

Further, the electrical connection between the connection terminal and the first repair line, by performing via through holes provided in the insulating film, is possible not to protrude the connection from the surface of the matrix substrate it can.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a matrix type display device of the present invention.

FIG. 2 is a plan view illustrating a method for repairing a disconnection of the matrix type display device of FIG. 1;

FIG. 3 is a partially enlarged cross-sectional view of the matrix type display device of FIG. 2;

FIG. 4 is a plan view showing another embodiment of the matrix type display device of the present invention.

FIG. 5 is a plan view showing one embodiment of a conventional matrix type display device.

FIG. 6 is a plan view illustrating a method for repairing a disconnection of the matrix type display device of FIG. 5;

FIG. 7 is a plan view illustrating a method for repairing a disconnection of the matrix type display device of FIG. 5;

FIG. 8 is a plan view showing another embodiment of the conventional matrix type display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Matrix board, 2 scanning wiring, 3 signal wiring, 4 signal pads, 5 display parts, 6 1st repair wiring, 7 2nd repair wiring, 8 connection terminals, 9 counter substrate, 10 second connection Terminal, 11 common electrode

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-85525 (JP, A) JP-A-2-89028 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1368 G02F 1/1345

Claims (5)

(57) [Claims] 1. A matrix substrate having a scanning are arranged in a matrix-like wiring and the signal wiring and display unit, a counter substrate facing the matrix substrate, a display which is sandwiched between the Matrix Li box substrate and the counter substrate In a matrix type display device including a material, a first repair wiring is formed on the matrix substrate via the scanning wiring and the signal wiring and an insulating film, and is in contact with the display material on the counter substrate.
A matrix-type display device, wherein a second repair wiring is provided on the surface on the side of the matrix. 2. A scanning line arranged in a matrix.
Matrix substrate having signal wiring and display unit,
Counter substrate facing the matrix substrate, the matrix substrate
Display material sandwiched between a plate and a counter substrate,
The scanning wiring and signal wiring and the insulating film
Repair wiring formed by the above method, the matrix substrate
Having a second repair wiring disposed outside the
In the box type display device, the first repair wiring and the scanning wiring are provided.
Break the insulating film at the intersection with the wire or signal wiring to
Connect the first repair wiring and the scanning wiring or the signal wiring to each other.
Pneumatic connection and the first restoration on both sides including this connection
Disconnect the connection wiring, and connect the connection portion and the second repair wiring to each other.
Matrix type display device characterized by being connected pneumatically
Disconnection repair method. 3. The second repair wiring is provided on a counter substrate.
3. The method for repairing a disconnection according to claim 2, wherein
Law. 4. A second repairing device on the matrix substrate.
Provide multiple connection terminals for electrical connection with wiring
3. The method for repairing a disconnection according to claim 2, wherein
Law. 5. A scanning line arranged in a matrix.
Matrix substrate having signal wiring and display unit,
Counter substrate facing the matrix substrate, the matrix substrate
Display material sandwiched between a plate and a counter substrate,
The scanning wiring and signal wiring and the insulating film
Repair wiring formed by the above method, the matrix substrate
Repair wiring arranged outside the matrix, the matrix described above
A through hoe formed on the substrate and formed on the insulating film
Connection electrically connected to the first repair wiring via the
And a matrix type display device having a terminal.
At the intersection of the repair wiring and the scanning wiring or signal wiring
The insulating film is broken and the first repair wiring and the scanning wiring are connected.
Or signal wiring, including this connection
The first repair wiring on both sides is cut off, and the connection terminals and
Electrically connecting to the second repair wiring.
For repairing disconnection of a matrix type display device.