JP3493952B2 - Manufacturing method of liquid crystal display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device. 2. Description of the Related Art In various electronic devices such as telephones, portable telephones, pagers, and electronic organizers, liquid crystal display devices are widely used as display units for displaying visible information. I have. The liquid crystal display device includes a liquid crystal display panel, a liquid crystal driving IC, and, if necessary, ancillary devices such as a backlight and a casing. 2. Description of the Related Art A liquid crystal display panel constituting a liquid crystal display device generally includes two substrates having a plurality of electrodes and having been subjected to an alignment treatment, which are opposed to each other, and a liquid crystal is sealed between the two substrates. In the manufacture of such a liquid crystal display panel, a plurality of semi-finished panels are generally formed using a large-size substrate in order to improve productivity in mass production. Then, the two large-sized substrates formed by assembling a plurality of semi-finished products are cut at predetermined positions, and a panel of a product size is cut out.
Therefore, it is necessary to ensure the cutting position accuracy in order to prevent defects due to inappropriate external dimensions of the product. Therefore, an alignment mark is provided at an appropriate cutting position on the substrate, and the substrate is cut using the alignment mark as a guide. As described above, the cutting of the substrate is performed along the alignment mark provided in advance, but in order to detect whether or not the cutting of the substrate has been performed within an appropriate range,
The only choice is to visually determine the deviation between the alignment mark and the actual cutting position or to measure the dimensions of the cut substrate. [0005] In recent years, the allowable range of the cutting position of the substrate tends to be narrowed. For example, whether or not the substrate is cut within an appropriate range is particularly problematic in the following cases. A description will be given based on FIGS. 6A and 6B. The liquid crystal display panel 200 has an electrode terminal group (not shown in FIG. 6) connected to a plurality of electrodes formed on the substrate. The electrode terminal group is composed of two substrates, a first substrate. 202 and the second substrate 204 are formed on the first substrate 202. Then, as shown in FIG. 6A, the portion of the second substrate 204 facing the electrode terminal group is cut and removed at a predetermined position (a portion indicated by an imaginary line in FIG. 6A), and the electrode terminal group is removed. Expose. The exposed electrode terminal group forming surface 206 serves as a mounting portion of a connection substrate 210 on which a driving IC is mounted in a mounting process, and a display drive circuit for driving the liquid crystal display panel 200 is connected to the electrode terminal group. You. Here, since the terminal pitch of the electrode terminal group has become very fine in recent years, the electrode terminal group forming surface 206 and the electrode terminal group forming surface 206 are formed so that the connection terminals of the connection substrate 210 and the electrode terminal group are securely connected. Alignment marks 208 and 212 are provided on the mounting portion of the connection board 210, respectively, and the alignment marks 208 and 212 are detected by image recognition means such as a monitor, and are aligned to form the connection board 2
10 are installed. [0008] However, as shown in FIG.
Assuming that the appropriate cutting position of the substrate is the position of the symbol a and the actual cutting position is the position of the symbol b, the effective mounting area of the connection substrate 210 is narrowed by the amount of the shift. Then, the alignment mark 212 of the connection substrate 210
However, there is a problem that the connection board 210 cannot be mounted even when the connection board 210 is mounted by aligning the connection board 210 with the alignment mark 208 of the electrode terminal group forming surface 206. The defect of the liquid crystal display panel 200 is determined up to the mounting stage of the connection board 210. As described above, in order to cope with a fine terminal pitch, the connection using the alignment mark is performed, so that the allowable range of the cutting position of the substrate has been reduced. In addition, the mounting area of the connection board 210 has recently been narrowing, and in this sense, the allowable range when cutting the board has been reduced. As described above, there is a need for a method for easily detecting whether or not the cutting of a substrate has been performed within an appropriate range while the cutting accuracy of the substrate is required. The present invention has been made to solve this problem, a method for manufacturing a liquid crystal display panel that can easily determine whether or not the substrate has been cut within an appropriate range, and can be determined before the mounting process,
It is an object of the present invention to provide a liquid crystal display panel and a liquid crystal display device manufactured by the manufacturing method. [0010] To achieve the above object, the present invention relates to a method of manufacturing a liquid crystal display device having a first substrate and a second substrate which are arranged to face each other. Connecting the plurality of first conductive patterns formed on the second substrate to the second conductive pattern formed on the second substrate, cutting the second substrate, and connecting the inspection apparatus to the plurality of first conductive patterns. And inspecting the connection state between the first conductive pattern and the second conductive pattern to determine whether or not the cutting position of the second substrate is within an allowable range. When the cutting position of the second substrate is within an allowable range, the second conductive pattern may
It is characterized in that it is configured to be cut together with the substrate. According to the above invention, the second conductive pattern is configured to be cut together with the second substrate when the cutting position of the second substrate is within an allowable range. By contacting the first and second conductive patterns with each other,
It can be determined whether the cutting position of the second substrate is within the allowable range. Therefore, even when the inspection device cannot be brought into contact with the conductive pattern formed on the cut second substrate, the cut position of the second substrate can be easily inspected. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. This will be described in detail based on FIG. FIG. 1A is an exploded perspective view showing a liquid crystal display device using the liquid crystal display panel manufactured by the liquid crystal display panel manufacturing method according to the present embodiment. As shown in FIG. 1, the liquid crystal display device 50
The liquid crystal display panel includes a liquid crystal display panel 10 and a liquid crystal drive circuit board 40 on which a liquid crystal drive circuit including a drive IC for driving and displaying the liquid crystal display panel 10 is mounted. On the liquid crystal drive circuit board 40, semiconductor drive input terminals (not shown) are formed as a wiring pattern. The liquid crystal display device 50 is incorporated in various electronic devices such as a mobile phone, a telephone, a pager, an electronic organizer, and the like, and is widely used as a display unit for displaying visible information. The liquid crystal display panel 10 is a simple matrix drive liquid crystal display panel, and forms a display surface for displaying visible information. The liquid crystal drive circuit board 40 has a drive IC connected to a board on which a connection circuit is printed, and is supported by a holder member 42, which is a transparent member made of resin, in order to maintain the overall strength. ing. Liquid crystal drive circuit board 40 and liquid crystal display panel 1
0 is connected via a heat seal 48. Specifically, the connection terminals 44 included in the drive circuit board 40
And the electrode terminal group 12 of the liquid crystal display panel 10 are connected via a heat seal 48. One end of the heat seal 48 is thermocompression-bonded to the electrode terminal group 12 of the liquid crystal display panel 10, and the other end is connected to the connection terminal 44 of the drive circuit board 40.
And thermocompression bonding. Here, the heat seal 48 is
This is a flexible wiring board in which a polymer film having a wiring pattern formed thereon, for example, a polyester film, is coated with a resin for thermocompression bonding. FIG. 5 is a sectional view showing the liquid crystal display panel 10. The liquid crystal display panel 10 has a first
It has a substrate 20 and a second substrate 22. The first substrate 20 and the second substrate 22 are made of transparent glass. Transparent electrodes 14 and 16 are formed on the inner surfaces of the first substrate 20 and the second substrate 22, respectively. These transparent electrodes 1
4 and 16 are all ITO (Indium Tin)
Oxide) film or other transparent conductive material, and a predetermined pattern is processed. Further, a film of, for example, polyimide is formed as an alignment layer 18 on the transparent electrodes 14 and 16, and an alignment process is performed. The first substrate 20 and the second substrate 22 are sealed with a predetermined gap, that is, a so-called cell gap, by an annular sealing member 30 provided on the inner periphery of the board, and a liquid crystal 32 is sealed in the gap. ing. Further, in order to maintain a constant cell gap, fine particles having a uniform particle size such as silicon dioxide are dispersed as a spacer material 34 between the first substrate 20 and the second substrate 22. As shown in FIG. 5, one end of the first substrate 20 extends beyond the end of the second substrate 22, and an electrode terminal group 12 is formed on the inner surface of this portion. ing. First substrate 20 on which electrode terminal group 12 is formed
The electrode terminal group forming surface 24 is a mounting area for the heat seal 48, and the electrode terminal group 12 is a connection portion to the liquid crystal drive circuit board 40 via the heat seal 48 (see FIG. 1). The transparent electrode 14 on the first substrate 20 side and the second
The conductive material 17 is electrically connected to the transparent electrode 16 on the substrate 22 side. Therefore, the electrode terminal group 12 formed on the electrode terminal group formation surface 24 of the first substrate 20 is
When the liquid crystal driving signal is connected to each of the electrodes 4 and 16 and the liquid crystal driving signal is input to the electrode terminal group 12, the liquid crystal driving signal can be sent to both of the transparent electrodes 14 and 16. The liquid crystal display panel 10 has the assembled 2
A plurality of large-sized substrates are formed in a state of being arranged in parallel, and individual liquid crystal display panels are cut out by cutting the large-sized substrate. The electrode terminal group 12 is obtained by cutting and removing the substrate constituting the second substrate 22 that is disposed to face the electrode terminal group formation surface 24 and exposing the substrate. That is,
An end 26 of the second substrate 22 on the side of the electrode terminal group 12 forms a cutting position. The area around the end 26 on the electrode terminal group 12 side of the second substrate 22 is an area to be cut of the liquid crystal display panel 10, and the liquid crystal display panel 10 has an inspection circuit 60 in the area to be cut. . FIG. 1B is a diagram schematically showing an inspection circuit 60 included in the liquid crystal display panel 10. The inspection circuit 60 includes a first conductive pattern 70 formed on the inner surface of the first substrate 20, a second conductive pattern 80 formed on the inner surface of the second substrate, and a first conductive pattern 70. And a conductive material 62 for connecting the second conductive pattern 80 to the second conductive pattern 80. The first conductive pattern 70 has a pair of electrodes arranged adjacent to each other, and the terminal portions 72 and 74 of the pair of electrodes are connected to one end 2 of the electrode terminal group forming surface 24.
It is arranged on the 5 side. Of the pair of terminal portions 72, 74, the terminal portion 72 on the electrode terminal group 12 side is the electrode terminal group 12
Is also used as one terminal located at the most end side. That is, the first conductive pattern 70 is provided using one terminal of the electrode terminal group 12. The second conductive pattern 80 of the liquid crystal display panel 10 is partially cut by cutting the second substrate 22 (a portion shown by imaginary lines in FIG. 1B). First, the configuration before the operation is described.
Both ends 82 of the second conductive pattern 80 are connected to the first conductive pattern 70 with the conductive material 62 interposed therebetween, and are provided over a pair of electrodes forming the first conductive pattern 70. As shown in FIG. 1B, the second conductive pattern 80 is formed on the electrode terminal group 12 of the second substrate 22.
Both ends 82, 82 are formed on the second substrate 20 side with the side end 26 interposed therebetween, and a connecting portion 84 connecting the both ends 82, 82 is formed.
Are formed to protrude toward the first substrate 20 side. The connecting portion 84 is disposed parallel to the end 26 of the second substrate,
The position is set such that the connection state of the second conductive pattern 80 changes depending on whether or not the cutting position of the second substrate 22 is within an appropriate range. This will be described in detail later. Specifically, in the liquid crystal display panel 10, as shown in FIG. 1B, since the second substrate 22 is cut at the position of the line c, the second conductive pattern 80 is cut. As a result, the inspection circuit is non-conductive. Each of the first conductive pattern 70 and the second conductive pattern 80 is made of ITO (Indium Tin O 2) similarly to the transparent electrodes 14 and 16 and the electrode terminal group.
xide) film and other transparent conductive materials. The conductive material 62 includes the transparent electrode 14 and the transparent electrode 1.
The conductive material 17 is similar to the conductive material 17 (see FIG. 5) that conducts the conductive material 6, and fine conductive particles are used. The conductive particles include Ni particles based on a metal material and A
A u-plated one, a phenol-based or styrene-based fine particle based on a solder material and a resin material, and Au-plated are used. Next, a method of manufacturing the liquid crystal display device having the above-described configuration will be described. First, a transparent electrode and an alignment layer are formed on each of the two large-size substrates, and the two large-size substrates are assembled, and cell sealing with a sealing material, liquid crystal injection, injection port sealing, and the like are performed. Through the above steps, a plurality of liquid crystal display panels are continuously formed on the assembled two large-sized substrates. Since these steps are conventionally well-known, a description thereof will be omitted.
In the step of forming the transparent electrode on the substrate, the above-described inspection circuit 60 is simultaneously formed in the region of the substrate to be cut. FIG. 3A is a cross-sectional view schematically showing a large substrate 90 before a cutting step in which a plurality of liquid crystal display panels are continuously formed. The large-size substrate 90 is formed by assembling two substrates 92 and 94 that form a first substrate or a second substrate. Note that reference numeral 30 indicates a sealing material. Large board 90
In FIG. 3A, one substrate is cut along the dotted line at the positions of arrows d and e, and two liquid crystal display panels 10 and 10 are cut out (see FIG. 3B). Here, two liquid crystal display panels cut out are denoted by reference numeral 10.
a and 10b. By this cutting, the two liquid crystal display panels 10a and 10b are cut out, and the respective electrode terminal group forming surfaces 24a and 24b are exposed. An inspection circuit is provided in each of the cut regions including the positions of the arrows d and e. As shown in FIG. 3C, the inspection circuit 60a
, A conductive material 62a and a second conductive pattern 80a. Further, the inspection circuit 60b has a first conductive pattern 70b, a conductive material 62b, and a second conductive pattern 80b. The inspection circuits 60a, 60
As described in the configuration of the liquid crystal display panel 10, Ob is formed on one end side of each of the electrode terminal group forming surfaces 24a and 24b using one terminal of the electrode terminal group. As described above, the inspection circuit 60 (6
0a, 60b) are set so that the electrical connection state changes depending on whether or not the cutting position of the second substrate is within an appropriate range. The inspection circuit 60a will be described as an example. FIG. 2 is a plan view showing the inspection circuit 60a, and is an explanatory diagram schematically showing a change in the connection state of the inspection circuit 60a depending on the cutting position of the substrate 94 forming the second substrate for the liquid crystal display panel 10a. The inspection circuit 60a determines that the appropriate cutting position is the position of the symbol d, and when the substrate 92 is cut between the position of the symbol d and the position of the symbol f, the second conductive pattern 8
0a is disconnected, and the inspection circuit 60a becomes non-conductive. That is, the cutting position is within the allowable range of the cutting position. When the cutting position shifts in the direction of arrow g beyond the position of the symbol f, the inspection circuit 60a is short-circuited (see FIGS. 2 and 3C). For example, when the substrate 92 is cut at the position indicated by the symbol h in FIG. 2, the inspection circuit 60a is short-circuited without cutting the second conductive pattern 80a. Similarly, assuming that the appropriate cutting position is the position of the symbol e, the inspection circuit 60b determines that the second conductive pattern is cut when the substrate 92 is cut between the position of the symbol e and the position of the symbol i. The test circuit 60b is turned off and the inspection circuit 60b is turned off. If the cutting position shifts in the direction of arrow j beyond the position of the symbol i, the inspection circuit 60b is short-circuited. The liquid crystal display panels 10a and 10b cut out through the above-described cutting process are subjected to a lighting display inspection for inspecting a display state. The lighting display inspection
The inspection is performed using an inspection apparatus including a drive signal supply unit for driving the liquid crystal display panels 10a and 10b for display, and a connector unit for connecting the electrode terminal group of the panel and the drive signal supply unit. Note that the inspection device also includes an inspection determination unit that inspects the electrical connection state of the inspection circuit. The lighting display inspection process for the liquid crystal display panel will be described with reference to the liquid crystal display panel 10 shown in FIG. First, the connector part of the inspection device is brought into contact with the electrode terminal forming surface 24. At this time, the connector portion is connected to one end 25 of the electrode terminal formation surface 24 simultaneously with the electrode terminal group 12.
Also, a pair of terminal portions 72 and 74 of the first conductive pattern 70 formed on the first conductive pattern 70 are in contact with each other. And a pair of terminal portions 7
An inspection signal is input from one of the circuits 2 and 74, and the electrical connection state of the inspection circuit 60 is monitored from the other. At this time, a predetermined alarm sound is set in the inspection determination unit of the inspection apparatus so that the predetermined alarm sound is generated when the inspection circuit 60 is short-circuited. If an alarm sound is generated during the display lighting inspection, the liquid crystal display panel is rejected as a defect outside the cutting position allowable range, and if no alarm sound is generated, the liquid crystal display panel is determined to be non-defective within the cutting position allowable range. After a cutting position determination step performed simultaneously with the display lighting inspection, the liquid crystal drive circuit board 40 is mounted through other necessary inspection steps, and the liquid crystal display device 50 is manufactured. The liquid crystal display device 50 is used as a component of various electronic devices such as a mobile phone, a telephone, and a pager. In addition, the liquid crystal display panel 10 may be provided with accessories such as a polarizing plate, a retardation plate, and a reflecting plate as needed. As described above, according to the method of manufacturing liquid crystal display panel 10 of the present embodiment, first substrate 20
An inspection circuit 60 is formed by forming a first conductive pattern 70 thereon and a second conductive pattern 80 on the second substrate 22 and connecting them by a conductive material 62. By providing the electrical connection state in the area to be cut of the liquid crystal display panel to be cut according to the cut position of the substrate, the terminal portion 7 is cut after the board is cut.
By determining the electrical connection state of the inspection circuit 60 by conducting to the second and 74, it is possible to electrically detect whether or not the substrate has been cut within an appropriate range. Therefore, it can be easily determined whether or not the board has been cut within an appropriate range, and the electrical connection to the terminal portions 72 and 74 can be made before the mounting step of the liquid crystal drive circuit board 40. Therefore, it is possible to detect a defect of the liquid crystal display panel due to improper cutting before the mounting process. The inspection circuit 60 is placed at the cutting position on the second substrate 22 and the electrode terminal group 1 on the first substrate 20.
The electrode terminal group forming surface 2 serving as a mounting region for the heat seal 48 is provided in the region serving as the end 26 on the second side.
In 4, it is possible to easily determine whether or not an effective connection area can be secured. Further, by providing at least one pair of terminal portions 72 and 74 connected to the inspection circuit 60 at one end 25 of the electrode terminal group forming surface 24 on the first substrate 20,
During a lighting display test in which an electrical signal is input to the electrode terminal group 12 by contacting the electrode terminal formation surface 24, a test signal can be input to the terminal portions 72 and 74 at the same time. The cutting position of the two substrates 22 can be determined. Therefore, the cutting position determination inspection of the substrate can be performed without increasing the number of steps. Since the one terminal 72 of the inspection circuit is also used as one terminal of the electrode terminal group 12, the labor for providing the inspection circuit 60 is reduced. In addition, the inspection circuit 60
Is set so as to be non-conductive when the cutting of the second substrate 22 is performed within an appropriate range, so that there is no influence after the liquid crystal display panel 10 is commercialized. In addition, the first conductive pattern 70, the second conductive pattern 80, and the conductive member 62 constituting the inspection circuit 60 can be simultaneously formed in the step of forming the transparent electrode on the substrate. 60 can be easily formed. FIG. 4 is a diagram schematically showing a method of manufacturing a liquid crystal display panel according to a modification. In the above-described embodiment, a case has been described where the end portion of the second substrate on the side of the electrode terminal group is set as the cutout scheduled region. It is possible to provide. For example, as shown in FIG. 4, when the liquid crystal display panel 100 is cut out from the large-size substrate 110, the present invention can be applied to a case where the side of the liquid crystal display panel 100 is set as a region to be cut. An inspection circuit 102 is provided in an area to be cut on the side of the liquid crystal display panel 100.
The inspection circuit 102 includes a first electrode pattern 104, a second electrode pattern 106, and a conductive material 108, and provides the second electrode pattern 106 over the planned cutting position with the position of the arrow 1 that is the planned cutting position interposed therebetween. The terminal portion of the first electrode pattern 104 is connected to the liquid crystal display panel 100.
Is provided on the electrode terminal group formation surface of the above. Then, after the liquid crystal display panel 100 is cut out, the electrical connection state of the inspection circuit 102 is detected in the same manner as in the above-described embodiment, and the side portion of the liquid crystal display panel 100 is cut within an appropriate range. Is determined. The present invention is not limited to the above-described embodiments and modifications, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment and the modified example, the case where the inspection circuit becomes non-conductive when the cutting is performed within an appropriate range has been described. However, the present invention is not limited to this. An inspection circuit may be provided so that the inspection circuit is short-circuited when the inspection is performed within a proper range. However,
When one terminal of the electrode terminal group is used as a terminal of the inspection circuit, if the cutting is performed within an appropriate range so as not to affect the display after mounting the liquid crystal driving circuit board, that is, In such a case, the inspection circuit is set to be non-conductive. In addition, a plurality of inspection circuits may be provided for each planned cutting area, and not only a deviation from the planned cutting position in one direction but also a deviation from the planned cutting position in both directions is within an allowable range. A plurality of inspection circuits may be provided for one cutting scheduled area so that it can be detected whether or not the inspection circuit is cut. In the present embodiment, the alarm sound is used for detecting the electrical connection state of the inspection circuit in the cutting position determination step. However, the present invention is not limited to this, and the detection of the electrical connection state of the inspection circuit may be performed. For example, a lamp or the like in the inspection device may be turned on. Further, the inspection for judging the cut position of the substrate is not necessarily performed together with the lighting display inspection, but may be performed alone. The substrate constituting the liquid crystal display panel is not limited to a glass substrate, but may be a transparent and flexible polymer film such as a polyethylene terephthalate film or a polybutylene terephthalate film. Further, in the above-described embodiment, an example in which the liquid crystal display panel manufactured is a simple matrix drive liquid crystal display panel has been described, but the present invention is not limited to this.
An active matrix liquid crystal display panel using a three-terminal switching element typified by a TFT or a two-terminal switching element typified by a MIM may be used as long as the switching elements can be formed on a flexible substrate constituting the panel. Further, the present invention is applicable to various types of liquid crystal display panels such as a ferroelectric liquid crystal display panel. In the above embodiment, the liquid crystal display device is constructed by connecting the liquid crystal display panel and the liquid crystal drive circuit board on which the liquid crystal drive circuit is mounted by heat sealing. A display driver circuit or the like may be mounted on a flexible substrate. In this case, the liquid crystal display device is constituted only by the liquid crystal display panel. Alternatively, a liquid crystal display panel fixed to a metal frame as a housing can be used as a liquid crystal display device, which is one component for electronic devices. Further, in the case of a backlight type, a liquid crystal display panel and a light guide having a backlight can be incorporated in a metal frame to constitute a liquid crystal display device. Instead, a TCP (Tape Carriage) in which an IC chip is mounted on a polyimide tape having a metal conductive film formed on one of two flexible substrates constituting a liquid crystal display panel body.
er Package), and can be used as a liquid crystal display device, which is a component for electronic equipment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is an exploded perspective view showing a liquid crystal display device using a liquid crystal display panel manufactured by a liquid crystal display panel manufacturing method according to the present embodiment. , The same figure (B)
FIG. 3 is an explanatory diagram schematically showing an inspection circuit provided in the liquid crystal display panel. FIG. 2 is an explanatory diagram schematically showing a change in a connection state of an inspection circuit depending on a cutting position of a substrate. FIG. 3 is a schematic cross-sectional view illustrating a method for manufacturing a liquid crystal display panel according to the present embodiment. FIG. 3A is a schematic cross-sectional view before a cutting step in which a plurality of liquid crystal display panels are continuously formed. FIG. 2B shows a state where the liquid crystal display panel is cut out from the large-size substrate, and FIG. 2C shows a change in the connection state of the inspection circuit depending on the cutting position of the large-size substrate. FIG. 4 is an explanatory view schematically showing a method for manufacturing a liquid crystal display panel according to a modification. FIG. 5 is a sectional view showing a liquid crystal display panel. FIG. 6A is a cross-sectional view showing cutting of a substrate for forming an electrode terminal group forming surface of a liquid crystal display panel;
FIG. 2B is a cross-sectional view showing the attachment of the connection board to the electrode terminal group formation surface. DESCRIPTION OF SYMBOLS 10, 10a, 10b Liquid crystal display panel 12 Electrode terminal group 24 Electrode terminal group formation surface 25 One end 26 of electrode terminal group formation surface 26 End portion of second substrate on electrode terminal group side 40 Liquid crystal drive circuit Substrate 48 Heat seal 50 Liquid crystal display device 60, 60a, 60b Inspection circuit 62, 62a, 62b Conductive member 70, 70a, 70b First conductive pattern 72, 74 Terminal portion 80, 80a, 80b Second conductive pattern 90 Large plate Substrate (Modification) 100 Liquid crystal display panel 102 Inspection circuit 104 First conductive pattern 106 Second conductive pattern 108 Conducting material 110 Large plate substrate

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takatomo Toda 3-35-5 Yamato, Suwa-shi, Nagano Seiko Epson Corporation (72) Inventor Sadatoshi Fujimori 3-5-2-5, Yamato, Suwa-shi, Nagano Say (56) References JP-A-5-88134 (JP, A) JP-A-7-146483 (JP, A) JP-A-9-113562 (JP, A) Jpn. (JP, U) Actually open sho 59-1444685 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1345 G02F 1/13 101 G02F 1/1333 G02F 1/1343

Claims (1)

(57) In a method for manufacturing a liquid crystal display device having a first substrate and a second substrate arranged to face each other, a plurality of first conductive members formed on the first substrate are provided. Connecting a pattern and a second conductive pattern formed on the second substrate; cutting the second substrate; and bringing an inspection device into contact with the plurality of first conductive patterns to form the first conductive pattern. Inspecting the connection state between the conductive pattern and the second conductive pattern to determine whether or not the cut position of the second substrate is within an allowable range. The second conductive pattern includes: A method for manufacturing a liquid crystal display device, characterized in that the second substrate is cut along with the second substrate when the cutting position of the second substrate is within an allowable range.