JP2005164750A - Method for manufacturing liquid crystal display panel, and the liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid crystal display panel in which tracing dynamic operating inspection to accurately detect an electrical defect of the liquid crystal display panel is applicable, while a terminal formed on an electrode terminal part is protected with a protective film, and the liquid crystal display panel. <P>SOLUTION: The liquid crystal display panel 1 is formed via a step of wiring a terminal 8, taken out from a display electrode 2 formed on a display region of the liquid crystal display panel 1, on the electrode terminal part 6 of a transparent substrate 2R constituting the liquid crystal display panel 1, a step of forming the protective film 13 having an inspection opening part 17, toward which at least a part of the terminals 8 to be inspected for electric connection is made to face on a region on the electrode terminal part 6, except for a terminal connection part 11 (10) to be connected to electrical components 7, 21, and a step of carrying out electrical connection inspection (the tracing dynamic operating inspection) for the terminals 8 to be inspected facing toward the inspection opening part 17, in a state in which the display electrode 3 can be energized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a liquid crystal display panel including a step of inspecting electrical connection of terminals formed on electrode terminal portions by an inspection apparatus using a pin probe, and a liquid crystal display panel as a result.

  As shown in FIG. 5, the liquid crystal display panel 1 constituting the liquid crystal display device generally has a pair of transparent substrates 2 arranged substantially in parallel and facing each other.

  Of the pair of transparent substrates 2, the transparent substrate 2 located on the observer side (upper in the figure) is a front substrate 2F, and the transparent substrate 2 located on the counter-observer side (lower in the figure) is The rear substrate 2R is used. A transparent electrode 3 made of indium tin oxide (hereinafter referred to as ITO) or the like is laminated on the surfaces of the transparent substrates 2R and 2F facing each other. The surface of the transparent substrate 2 on which the transparent electrode 3 is formed has an alignment film (not shown) whose surface is rubbed to arrange liquid crystal molecules in a certain form between the electrodes facing each other. Are stacked. A sealing material 4 for adhering and integrating the transparent substrates 2R and 2F is disposed in a substantially rectangular frame shape around the opposing surfaces of the pair of transparent substrates 2, and the sealing material 4 is filled with liquid crystal (not shown) together with a spacer (not shown) for adjusting the gap size between the transparent substrates 2R and 2F. A liquid crystal layer 5 is formed therebetween. A portion sandwiching the liquid crystal layer 5 constitutes a display area of the liquid crystal display panel 1.

  The pair of transparent substrates 2 is made of a transparent resin such as transparent glass or polycarbonate, and is formed in a substantially rectangular flat plate shape, and one end side portion of the rear substrate 2R is formed from an edge of the front substrate 2F. It extends so as to protrude, and an electrode terminal portion 6 is formed in this portion.

  The electrode terminal portion 6 is formed with a transparent conductive film made of ITO or the like in a predetermined pattern by a photolithographic method or the like, so that terminals drawn from the transparent electrode 3 (output signal terminal 8, input signal terminal 9, An external connection terminal 10) connected to the input signal terminal 9 is formed. The output signal terminal 8 and the input signal terminal 9 are formed so as to face the terminal connection portion 11 to which the IC chip 7 that is COG mounted on the liquid crystal display panel 1 is connected.

  In the liquid crystal display panel 1 having such a configuration, a connection wiring member (not shown) as an electronic component such as a flexible wiring board is connected to the external connection terminal 10 of the rear substrate 2R, A predetermined image is formed by applying a voltage between the transparent electrodes 3 formed on the transparent substrates 2R and 2F via the connecting wiring member.

  By the way, in the manufacturing process of the liquid crystal display panel 1 configured in this manner, the manufactured liquid crystal display panel 1 is electrically connected one by one in order to check whether or not the manufactured liquid crystal display panel 1 can actually form an image. A step of checking a proper connection.

  As an inspection of the electrical connection, the distance between the output signal terminal 8 and the input signal terminal 9 has become narrower due to the increase in the density of the transparent electrode 3 accompanying the refinement of the liquid crystal display panel 1. In many cases, inspection by an inspection apparatus using the pin probe 12A at the tip is employed.

  The inspection by the inspection apparatus using the pin probe 12A will be briefly described. As shown in FIG. 6A, the non-contact sensor 14 is provided on the back surface side of the terminal forming surface of the electrode terminal portion 6 of the rear substrate 2R. A pin probe 12A made of a tungsten alloy or the like attached to the pin probe head 12 in the disposed state is a terminal (output signal terminal 8) formed on the electrode terminal portion 6 and subject to electrical connection inspection. Are sequentially contacted with each other. At the same time, an alternating current is applied to the pin probe 12 </ b> A to apply a voltage, and a capacitance is generated between the width of one terminal and the non-contact sensor 14. Then, the current value at this time is converted into a voltage in a measuring unit (not shown), and an electrical connection failure such as disconnection or leakage is detected (hereinafter, this electrical connection inspection method is referred to as “tracing lighting”). Inspection ”).

  When there is no problem in electrical connection with the liquid crystal display panel, the voltage values at this time are substantially equal as shown in FIG. 6B.

  For example, as shown in FIG. 7A, when a leak occurs between two terminals (output signal terminals 8 and 8), the two terminals (output signal terminals 8 and 8). Since an alternating current flows through the capacitor, the capacitance formed is increased and the voltage value to be detected is also increased. As shown in the schematic graph of FIG. 7B, the voltage value at this time protrudes higher than the voltage value of the other terminals (output signal terminals 8), and thus the liquid crystal display panel. 1 can be easily and reliably determined to be defective.

  Further, when the terminal to be inspected (output signal terminal 8) is disconnected, the formed capacitance decreases and the detected voltage value also increases. Since the voltage value at this time is smaller than the voltage value of the other terminal (output signal terminal 8) as shown in the schematic graph of FIG. It is possible to easily and reliably determine that there is a defect.

By the way, on the electrode terminal portion 6 of the liquid crystal display panel, for example, moisture adhering to the terminals 8, 9, 10 causes the conductors constituting the terminals 8, 9, 10 to corrode or peel off. In some cases, the protective film 13 is made of an insulating resin material for the purpose of preventing leakage or the like. Specifically, the protective film 13 includes the external connection terminal 10 as the terminal connection portion 11 that is electrically connected to other electrical components, the output signal terminal 8 on which the IC chip 7 is mounted, and It is formed in a portion excluding the terminal connection portion 11 where the input signal terminal 9 faces. Conventionally, the protective film 13 is formed using a film used for forming the liquid crystal display panel 1 from the viewpoint of easy formation. For example, the alignment film formed on the surface of the transparent substrate 2 on which the transparent electrode 3 is formed is formed not only in the display region of the liquid crystal display panel 1 but also on the electrode terminal portion 6 in a predetermined pattern, and the protection The film 13 may be caused to act. Alternatively, a SiO ₂ (silicon oxide) film is formed between the transparent electrode 3 and the alignment film in the display region to improve the adhesion of the alignment film and to prevent a short circuit between the opposing transparent electrodes 3. In this case, the SiO ₂ film can also be formed in a predetermined pattern on the electrode terminal portion 6 to act as the protective film 13.

Japanese Patent Laid-Open No. 02-177547 JP 2001-1000016 A

  However, if the protective film 13 is formed on the electrode terminal portion 6, the protective film 13 is used as the terminal connection portion 11 in which the electrode terminal portion 6 is electrically connected to other electrical components. Since the external connection terminal 10 and the output signal terminal 8 on which the IC chip 7 is mounted and the input signal terminal 9 are formed so as to cover a portion excluding the terminal connection portion 11, the electrode terminal portion 6 The terminal (output signal terminal 8) for performing the above-described tracing lighting test was not exposed, and the tracing lighting test could not be performed.

  In view of such a technical problem, the present invention performs a trace lighting inspection capable of accurately detecting an electrical defect of a liquid crystal display panel while protecting each terminal formed on the electrode terminal portion with a protective film. It is an object of the present invention to provide a liquid crystal display panel manufacturing method and a liquid crystal display panel that can be applied.

  In order to achieve the above-described object, the liquid crystal display panel manufacturing method of the present invention is characterized in that display electrodes formed in the display area of the liquid crystal display panel on electrode terminal portions of a transparent substrate constituting the liquid crystal display panel. A step of wiring a terminal drawn out from, a protective film having an inspection opening facing at least a part of the terminal to be inspected for electrical connection, excluding a terminal connection portion for connecting to an electrical component, The step of forming on the electrode terminal portion, with the display electrode energized, the pin probe of the inspection apparatus is sequentially brought into contact with the terminal to be inspected facing the inspection opening to energize By detecting the capacitance and voltage generated between the terminal of the energized display electrode and the non-contact sensor disposed through the transparent substrate on which the electrode terminal portion is formed, Contact In that it has a step of performing the inspection.

  At that time, the terminal of the display electrode to be inspected is formed by arranging at least a part of each terminal in parallel, and the protective film has the inspection opening portion of the terminal of the display electrode to be inspected. It is formed so that the portions formed in parallel face each other and are opened in a straight line so as to be orthogonal to the portions formed in parallel of the terminals.

  The inspection opening is formed to have a width of 2 mm or more.

  And, in the subsequent step of the step of inspecting the electrical connection, when the connecting portion between the terminal connection portion and the electronic component is molded with a reinforcing member, the inspection opening is covered with the reinforcing member. Also features.

  Further, in the step of inspecting the electrical connection, a plurality of liquid crystal display panels in which liquid crystal is sealed between a pair of transparent substrates have electrode terminal portions of each liquid crystal display panel arranged in the same line. It is also characterized in that it is continuously performed on each liquid crystal display panel in the state of being a stick substrate.

  Further, the liquid crystal display panel of the present invention is characterized in that a display electrode to be subjected to an inspection of electrical connection on a terminal of a display electrode drawn on an electrode terminal portion of a transparent substrate constituting the liquid crystal display panel. The protective film in which the opening for inspection which faces this terminal is formed is laminated.

  According to the method for manufacturing a liquid crystal display panel of the present invention, even when the terminals of the display electrodes drawn out on the electrode terminal portions are covered with the protective film to protect the terminals, the inspection is performed in the protective film. Since each terminal of the display electrode drawn out on the electrode terminal part faces and is exposed in the opening, the pin probe of the inspection apparatus is sequentially brought into contact with each exposed terminal to energize it. By doing so, the electrical connection can be inspected.

  At that time, at least a part of the terminals are formed in parallel, and the inspection opening has a portion formed in parallel of the terminals of the display electrode to be inspected, and the inspection If the protective film is formed so that the opening is perpendicular to the portion formed in parallel with each terminal and is opened in a straight line, the tracing direction of the pin probe at the time of the trace lighting inspection is set to one direction. Thus, the inspection of the electrical connection can be performed easily and reasonably with a short tact time.

  Furthermore, by forming the inspection opening with a width of 2 mm or more, it is possible to secure an inspection target area that is not affected by the composition component that oozes from the resin material constituting the protective film. If the electrical connection is inspected using the pin probe, the inspection result can be made more reliable.

  In the subsequent step of the electrical connection inspection, when the inspection opening is molded with a reinforcing member, the connection portion of the external wiring board or the semiconductor chip as an electrical component connected to the terminal connection portion Since the terminals exposed on the electrode terminal portions can be eliminated by covering with the reinforcing member, moisture adhering to the terminals corrodes or peels off the conductors constituting the terminals. Alternatively, it is possible to surely prevent the leakage from being caused.

  Furthermore, if the electrical connection inspection is continuously performed on each liquid crystal display panel in a state of being a stick substrate, the electrical connection inspection on a plurality of liquid crystal display panels can be performed more efficiently. Can be performed.

  The liquid crystal display panel of the present invention thus manufactured is formed on a protective film laminated on each terminal of the display electrode drawn out on the electrode terminal portion of the transparent substrate constituting the liquid crystal display panel. A pin probe of an inspection apparatus is attached to each terminal of the display electrode to be inspected that is exposed to the opening of the inspection opening in a state where the display electrode can be energized using the inspection opening that has been made. Electrical contact is inspected by monitoring the capacitance and voltage generated between each terminal of the display electrode and the non-contact sensor disposed via the transparent substrate. be able to. By performing this inspection in the manufacturing process, it is possible to reliably remove a poorly connected liquid crystal display panel from the manufacturing line.

  A liquid crystal display panel manufacturing method and a liquid crystal display panel embodiment of the present invention will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected about the same member demonstrated in the above-mentioned prior art example, and the description is abbreviate | omitted.

  In the method for manufacturing a liquid crystal display panel according to the present embodiment, first, a bonded substrate (mother substrate) 15 in which two transparent substrates 2 are bonded with a sealing material 4 is formed. As shown in FIG. 1, the bonded substrate 15 is configured such that a plurality of display cells 16 constituting the liquid crystal display panel 1 can be laid out and cut out.

  Hereinafter, the process of forming the bonded substrate 15 will be described.

  In the present embodiment, of the two transparent substrates 2 constituting the bonded substrate 15, one transparent substrate 2 (rear substrate 2R) has a transparent electrode 3 as a display electrode having a predetermined shape. After the patterning, a protective film 13 made of SiO2 is formed on the upper surface, and then an alignment film (not shown) is formed and subjected to a rubbing process.

  When the transparent electrode 3 is formed by patterning, a portion of the transparent substrate 2R that becomes the electrode terminal portion 6 of the cut-out liquid crystal display panel 1 is also formed from the transparent electrode 3 in a predetermined pattern by a photolithography method or the like. Externally connected terminals as terminal connection portions 11 that lead out terminals (output signal terminal 8, input signal terminal 9, and further connected to the input signal terminal 9 to connect a connection wiring member as an electronic component such as the flexible wiring substrate 21. 10). Part of the output signal terminal 8 and the input signal terminal 9 is formed so as to face the terminal connection portion 11 on which the IC chip 7 is mounted.

  At this time, in this embodiment, at least a part of the terminals to be inspected for electrical connection (in this embodiment, the display signal side end portion of the output signal terminal 8) is formed in parallel. To.

Then, as shown in FIG. 2, a protective film 13 made of a SiO ₂ film is laminated on the surface of the rear substrate 2R on which the transparent electrode 3 is formed.

  In the present embodiment, the protective film 13 is not only electrically connected to the IC chip 7 and the flexible wiring substrate 21, but also to the display area of the liquid crystal display panel 1 cut out from the bonded substrate 15. The region on the electrode terminal portion 6 except for each terminal connection portion 11 (including the external connection terminal 10) to be covered is formed.

  At this time, an inspection opening 17 is formed in the protective film 13 so as to expose at least a part of the terminal to be inspected for electrical connection. In the present embodiment shown in FIG. 2, the inspection opening 17 exposes a portion formed in parallel with a terminal (output signal terminal 8) to be inspected for electrical connection, and The terminals (output signal terminals 8) are formed so as to be opened in a straight line perpendicular to the portion formed in parallel. In this way, by forming the inspection opening 17 in the protective film 13, the tracing direction of the pin probe at the time of the tracing lighting inspection performed in a later process can be set to one direction, and the electrical connection Inspection can be performed easily and reasonably with a short tact time.

  Furthermore, in this embodiment, the said inspection opening part 17 is formed in the width dimension of 2 mm or more. Here, the width dimension is set to 2 mm or more when the electrical connection is inspected by using an inspection apparatus using the pin probe 12A in which the R dimension of the tip is 5 μm in the subsequent process. This is to ensure an inspection target region having a certain width with which the pin probe 12A is brought into contact so that the composition component that exudes from SiO2 constituting the film 13 does not hinder the detection of an accurate inspection result. That is, as a result of the experiment, as shown in the graph of FIG. 3, it was found that the SiO2 film formed on the transparent substrate 2 oozes its components into the region of about 750 μm from the end of the arrangement region. It was. In the area contaminated by the exudation component, the contact of the pin probe 12A with the terminal (output signal terminal 8) is not sufficient, and the result indicating disconnection may be erroneously detected. Therefore, in consideration of the results of this experiment, and considering the accuracy with which the pin probe 12A having a pointed end of about 5 μm, which is normally used, is brought into contact with the terminal (output signal terminal 8), the inspection opening is used. The width dimension of the portion 17 is preferably 2 mm or more, and the central portion in the width direction is secured as the inspection target region.

  Subsequently, the sealing material 4 is applied to the transparent substrate 2R to form a seal portion. The shape of the seal portion is a frame-shaped seal portion (hereinafter referred to as a frame-shaped seal portion) that has a liquid crystal injection port (not shown) protruding outward and becomes an outline of the formation region of the liquid crystal display panel 1 after cutting. 4A), on the transparent substrate 2R, as shown in FIG. 1, a plurality of the frame-shaped seal portions 4A are formed by arranging a plurality of pieces vertically and horizontally, and a liquid crystal display of one unit is formed in a subsequent process. The panel 1 can be divided. In addition, the outer side of each said frame-shaped seal | sticker part 4A is the said electrode terminal part 6, and the said output signal terminal 8, the input signal terminal 9, and the external connection terminal 10 are formed.

  For one opposing transparent substrate 2 (front substrate 2F), a transparent electrode 3 as a display electrode is patterned and formed into a predetermined shape, an alignment film is applied, rubbed, and then a spacer (not shown) ). At this time, the transparent electrode 3 is formed only in a portion to be a display area of each liquid crystal display panel 1.

  Then, the rear substrate 2R on which the frame-shaped seal portion 4A is formed and the front substrate 2F on which the spacers are dispersed are accurately superimposed and thermocompression bonded to obtain the bonded substrate 15.

  Next, the process from the bonded substrate board 15 to the process of dividing the single unit liquid crystal display panel 1 will be described.

  First, the bonded substrate 15 is arranged such that the frame-shaped seal portions 4A are arranged in the horizontal direction, and the portions to be the electrode terminal portions 6 of the liquid crystal display panels 1 are arranged on the same line. One liquid crystal inlet is cut into a plurality of strip-shaped sticks so as to open on the side opposite to the side where the frame-shaped seal portion 4A on which the electrode terminal portions 6 are arranged is formed.

  In the present embodiment, when the sticked bonded substrate 18 is divided from the bonded substrate 15, the electrode terminal portion 6 of the rear substrate 2R is removed from the front substrate 2F for each liquid crystal display panel 1. The cut-out work is also carried out by cutting out so as to protrude in the direction.

  Then, the liquid crystal inlet of the stick substrate 18 is immersed in the liquid crystal in a vacuum, and the liquid crystal is introduced into the cavity surrounded by the frame-shaped seal portion 4A using the differential pressure and the capillary phenomenon when returning to atmospheric pressure. The liquid crystal injection opening is sealed with a sealing material such as resin.

  In this embodiment, in this state, the output signal terminal 8 and the input signal terminal 9 face each of the plurality of liquid crystal display panels 1 that are formed on the stick substrate 18 and are not cut out. Then, an IC chip 7 as an electrical component is mounted, and the transparent electrode 3 can be energized by electrically connecting the output signal terminal 8 and the input signal terminal 9 formed in the electrode terminal portion.

  Subsequently, the terminal to be inspected (output signal terminal 8) exposed to the inspection opening 17 is sequentially brought into contact with the pin probe 12A constituting the inspection device for electrical connection. The liquid crystal display panel 1 as a product is discriminated by judging whether the product is good or bad for each liquid crystal display panel.

At this time, the electrical connection is inspected so that the pin probe 12A traces the central portion (inspection target region) in the width direction in the inspection opening 17, so that SiO constituting the protective film 13 is formed. _A more accurate test result can be obtained without being affected by the composition component that oozes from ₂ . Further, as in the present embodiment, if the liquid crystal display panel 1 is continuously inspected with the stick substrate 18, the electrical connection to the plurality of liquid crystal display panels 1 is performed. It is possible to perform the inspection more efficiently. In addition, about the point of the said trace lighting test | inspection, since it is the same as that of the past, description is abbreviate | omitted.

  Then, the stick substrate 18 is separated in units of one by a planned dividing line (indicated by a two-dot chain line in FIG. 1) located in a region between the frame-shaped seal portions 4A in the arrangement direction of the frame-shaped seal portions 4A. The desired liquid crystal display panel 1 is obtained by dividing the liquid crystal display panel 1. At this time, the liquid crystal display panel having a problem in the electrical connection inspection is removed.

  Subsequently, as a result of inspection of electrical connection, a signal is sent to the IC chip 7 to the external connection terminal 10 wired at a predetermined position at the tip of the electrode terminal portion 6 of the liquid crystal display panel 1 determined to have no problem. The connection terminal (not shown) of the flexible wiring board 21 as an external wiring board that supplies the electric power is electrically connected through a conductive bonding member (not shown) such as an anisotropic conductive film.

  Then, the IC chip 7 mounted on the terminal connection portion 11 and the connection part between the external connection terminal 10 and the flexible wiring board 21 are protected by molding with a reinforcing member 19 made of a resin material. In this case, the inspection opening 17 used for the inspection of the electrical connection is covered with the reinforcing member 19.

  As described above, when the connecting portion between the external connection terminal 10 and the flexible wiring board 21 or the mounting portion of the IC chip 7 is molded with the reinforcing member 19, the inspection opening 17 is covered with the reinforcing member 19. If this is the case, the number of work steps is not increased, and the terminals 8, 9, and 10 drawn on the electrode terminal portion 6 have no exposed portions, so that the terminals 8, 9, and 10 are corroded. Can be reliably prevented.

  FIG. 4 is a cross-sectional view of the main part showing the electrode terminal portion of the liquid crystal display panel of the present embodiment manufactured as described above.

  As described above, the electrode terminal portion 6 of the liquid crystal display panel of the present embodiment is formed on one end side portion of the rear substrate 2R that is formed so as to protrude from the edge of the front substrate 2F.

  A transparent conductive film made of ITO or the like is formed on the electrode terminal portion 6 in a predetermined pattern by a photolithography method or the like, so that the IC chip 7 that is COG mounted on the liquid crystal display panel is connected to the transparent electrode 3. An output signal terminal 8 having a predetermined pattern and an input signal terminal 9 having a predetermined pattern are formed, and an external connection terminal 10 connected to the input signal terminal 9 is formed.

  In the liquid crystal display panel 1 of the present embodiment, terminals (output signal terminals 8) to be inspected for electrical connection are arranged in parallel with the electrode terminal portions 6 of the transparent substrate 2R constituting the liquid crystal display panel 1. The protective film 13 formed with the inspection opening 17 that exposes and exposes the formed part is connected to the terminal connection part 11 on which the IC chip 7 is mounted and the flexible wiring board 21. Are formed so as to cover a region excluding the external connection terminal 10 (see FIG. 2).

  An IC chip 7 is mounted on the terminal connection portion 11 where the output signal terminal 8 and the input signal terminal 9 of the electrode terminal portion 6 are exposed, and the IC chip 7 is mounted on the external connection terminal 10. 7 are electrically connected via a conductive bonding member (not shown) such as an anisotropic conductive film.

  In the liquid crystal display panel of the present embodiment, the terminal connection part 11 on which the IC chip 7 is mounted and the connection part between the external connection terminal 10 and the flexible wiring board 21 are molded by the reinforcing member 19 made of a resin material. Further, the opening of the inspection opening 17 is also covered with the reinforcing member 19.

  In the liquid crystal display panel 1 configured as described above, in the manufacturing process, the inspection opening 17 is used, and the terminal (output signal terminal 8) exposed in parallel with the inspection opening 17 is used. On the other hand, the tracing lighting inspection can be performed efficiently. In addition, since the liquid crystal display panel 1 completed as a product is covered and protected by the protective film 13 or the reinforcing member 19, all the terminals 8, 9, and 10 disposed in the electrode terminal portion 6 are protected. It is possible to completely prevent moisture or the like adhering to the terminals 8, 9, 10 from corroding, peeling off, or causing leakage of the conductors constituting the terminals 8, 9, 10. it can.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

For example, in the embodiment, an insulating layer film made of SiO ₂ is provided as the protective film, but the protective film is formed using an alignment film provided in the display region of the liquid crystal display panel. It is also possible. In this embodiment, the liquid crystal display panel in which an IC chip is mounted on the electrode terminal portion has been described. However, a liquid crystal display panel in which a semiconductor chip such as an IC chip is not mounted on the electrode terminal portion may be used. Further, in the embodiment, the trace lighting inspection is performed in a state of a stick substrate, but after the stick substrate is divided into a single liquid crystal display panel, the trace lighting inspection is performed on each liquid crystal display panel. It is also possible to partially change the order of the processes, for example.

  Further, in the present embodiment, as the protective film that covers and protects the electrode terminal portion, the film constituting the display region of the liquid crystal display panel is extended and disposed. You may form the protective film which coat | covers and protects separately in an independent process.

Schematic explanatory view showing a bonded substrate, a stick substrate, and a single unit liquid crystal display panel in the method of manufacturing a liquid crystal display panel of the present embodiment The principal part top view which shows the arrangement | positioning positional relationship of each terminal and protective film which were formed in the electrode terminal part in the manufacturing method of the liquid crystal display panel of this embodiment. Graph showing experimental results of the relationship between separation dimension from disposing region end of the detection amount and the SiO ₂ film components seeped SiO ₂ film Sectional drawing which shows the principal part which shows the structure of the electrode terminal part of the liquid crystal display panel of one Embodiment of this invention Cross-sectional view of the main part showing the structure of the electrode terminal portion of a conventional liquid crystal display panel A conceptual cross-sectional view (A) when a trace lighting test is performed on a liquid crystal display panel having no problem in electrical connection, and a schematic graph (B) showing a detected voltage state A conceptual cross-sectional view (A) when a trace lighting test is performed on a liquid crystal display panel having a problem in electrical connection, and a schematic graph (B) showing a detected voltage state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 2 Transparent substrate 2F Front substrate 2R Rear substrate 3 Transparent electrode 4 Sealing material 4A Frame-shaped seal part 5 Liquid crystal layer 6 Electrode terminal part 7 IC chip 8 Output signal terminal 9 Input signal terminal 10 External connection terminal 11 Terminal connection Portion 12 Pin probe head 12A Pin probe 13 Protective film 14 Non-contact sensor 15 Bonded substrate 16 Display cell 17 Inspection opening 18 Stick substrate 19 Reinforcing member 21 Flexible wiring substrate

Claims (6)

Wiring the terminals drawn from the display electrodes formed in the display area of the liquid crystal display panel on the electrode terminal portions of the transparent substrate constituting the liquid crystal display panel;
A step of forming a protective film having an inspection opening that exposes at least a part of the terminal to be inspected for electrical connection on the electrode terminal portion, excluding the terminal connection portion to be connected to an electrical component;
In a state in which the display electrode can be energized, the terminals to be inspected facing the inspection opening are sequentially brought into contact with the pin probe of the inspection apparatus and energized. A step of inspecting an electrical connection by detecting a capacitance and a voltage generated between the terminal and a non-contact sensor disposed via a transparent substrate on which the electrode terminal portion is formed. A method for producing a liquid crystal display panel, comprising: The terminal of the display electrode to be inspected is formed by paralleling at least a part of each terminal,
The protective film is arranged in a straight line with the inspection opening facing a portion formed in parallel with the terminal of the display electrode to be inspected and orthogonal to the portion formed in parallel with the terminal. The method for producing a liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is formed so as to open in a shape.   The method for manufacturing a liquid crystal display panel according to claim 1, wherein the inspection opening is formed to have a width of 2 mm or more.   2. The inspection opening is covered with the reinforcing member when the connecting portion between the terminal connecting portion and the electronic component is molded with a reinforcing member in a subsequent step of the step of inspecting the electrical connection. 4. A method for manufacturing a liquid crystal display panel according to any one of items 1 to 3.   The step of inspecting the electrical connection includes a stick substrate in which a plurality of liquid crystal display panels in which liquid crystal is sealed between a pair of transparent substrates have electrode terminal portions of each liquid crystal display panel arranged on the same line 5. The method for manufacturing a liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is continuously applied to each liquid crystal display panel. An inspection opening is formed on the terminal of the display electrode drawn out on the electrode terminal of the transparent substrate constituting the liquid crystal display panel so that the terminal of the display electrode to be inspected for electrical connection faces. A liquid crystal display panel, wherein a protective film is laminated.