WO2010116574A1 - アクティブマトリックス基板、表示パネル、表示装置、およびレーザ照射方法 - Google Patents
アクティブマトリックス基板、表示パネル、表示装置、およびレーザ照射方法 Download PDFInfo
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- WO2010116574A1 WO2010116574A1 PCT/JP2009/071760 JP2009071760W WO2010116574A1 WO 2010116574 A1 WO2010116574 A1 WO 2010116574A1 JP 2009071760 W JP2009071760 W JP 2009071760W WO 2010116574 A1 WO2010116574 A1 WO 2010116574A1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136213—Storage capacitors associated with the pixel electrode
Definitions
- the present invention relates to an active matrix substrate included in a display panel, the display panel itself, a display device including the display panel, and a laser irradiation method for the active matrix substrate.
- a switching element such as a TFT (Thin Film Transistor) is used for pixel control.
- a substrate on which such a switching element is mounted is called an active matrix substrate, and is used not only in a liquid crystal display device but also in various display devices.
- a capacitive signal line 125 that is divided into a gate signal line 121 and a source signal line 122 and overlaps with a pixel (pixel electrode 124) arranged in a matrix. And shorting the drain electrode 115 of the TFT 110.
- the laser is irradiated to the tip 126 of the drain electrode 115 (hereinafter referred to as the auxiliary capacitance electrode 126) that overlaps the capacitance signal line 125 through the gate insulating film of the TFT 110 (note that the laser irradiation region is not irradiated).
- FIG. 15 which is a cross-sectional view taken along the line bb ′ in FIG. 14, the layered capacitive signal line 125, gate insulating film 112, and auxiliary capacitive electrode 126 are irradiated with laser.
- the symbol w means the diameter of the laser spot sp).
- the intensity adjustment of this laser must be set appropriately.
- the auxiliary capacitance electrode 126 is scattered and the auxiliary capacitance electrode 126 and the capacitance signal are scattered.
- the line 125 is difficult to be connected.
- the intensity of the laser is too weak, as shown in FIG. 17, the contact hole hl is not formed in the gate insulating film 112, and the auxiliary capacitor electrode 126 and the capacitor signal line 125 are not connected. Therefore, in these cases, the signal flowing through the capacitor signal line 125 is not supplied to the pixel electrode 124 (that is, the pixel) in place of the source signal, and the bright spot or the like is not eliminated.
- the present invention has been made to solve the above problems.
- the purpose of this is to irradiate the active matrix substrate with a laser, such as an active matrix substrate that enables the supply of various laser energy to the irradiated member, and further supply of such various laser energy. It is an object of the present invention to provide a laser irradiation method that enables the above.
- the active matrix substrate includes a substrate, a switching element attached to the substrate, a gate signal line connected to the gate electrode of the switching element, a source signal line connected to the source electrode of the switching element, a drain electrode of the switching element, and a drain electrode
- a cutout or an opening is formed in the partial electrode.
- the active matrix substrate built in the display panel includes switching elements that control the pixels.
- This switching element supplies a source signal flowing through the source signal line to the pixel based on the gate signal flowing through the gate signal line.
- the partial electrode which is a part of the drain electrode becomes an auxiliary capacitance by facing the capacitance signal line through the insulating film.
- the switching element may be damaged.
- the pixel controlled by the switching element becomes, for example, a bright spot and contributes to image quality degradation.
- the partial electrode and the capacitive signal line are welded with a laser that irradiates a part of the active matrix substrate so that the signal flowing through the capacitive signal line is supplied to the pixel instead of the source signal.
- the laser is irradiated in this way, if a notch or an opening is formed in the partial electrode in the active matrix substrate, while a vacant part such as a notch passes a part in the laser spot, A peripheral portion such as a notch blocks another part of the laser spot. The following can be said depending on whether or not such a laser is shielded.
- the intensity of the laser is set to be relatively low.
- a contact hole for connecting the partial electrode and the capacitive signal line may not be formed in the insulating film covered with the partial electrode.
- a notch or the like is formed in the partial electrode
- the peripheral portion such as the notch overlapping the laser spot is appropriately Melt.
- a laser spot that overlaps a vacant part such as a notch supplies laser energy to the insulating film without passing through a partial electrode, so that laser energy is supplied to the insulating film without loss.
- a contact hole is formed.
- various laser energy can be supplied to the irradiated member even though the laser intensity does not change.
- the laser energy corresponding to the required processing for example, formation of a contact hole in an insulating film or melting a partial electrode to be welded to a capacitance signal line
- Supply becomes possible.
- a part of the partial electrode is surely welded to the capacitive signal line through the contact hole (in short, the pixel can be supplied with the signal of the capacitive signal line and is less likely to become a bright spot).
- the center portion is stronger than the edge portion. Therefore, when a part of the partial electrode and the capacitance signal line are welded by laser irradiation, the following is desirable.
- the notch width of the notch or the aperture width of the aperture is narrower than the laser spot diameter, so that the empty part of the notch or the empty part of the aperture allows the light in the center part of the laser spot to pass through and passes through the insulating film.
- the peripheral portion of the notch or the peripheral portion of the aperture which is a part of the partial electrode, receives the light of the edge portion of the laser spot.
- the center portion of the relatively strong laser spot passes through a vacant portion such as a notch and hits the insulating film, thereby reliably forming a contact hole.
- the partial electrode since the light at the edge of the laser spot corresponding to the peripheral part such as a notch is weaker than the center part of the laser spot, the partial electrode is not melted excessively and scattered. Therefore, a part of the partial electrode is reliably welded to the capacitive signal line through the contact hole.
- the shape of the overlapping portion of the peripheral portion of the notch or the peripheral portion of the aperture and the edge portion of the laser spot is an enclosing shape surrounding the empty portion of the notch or an enclosing shape surrounding the empty portion of the aperture (L-shaped, V-shaped, U-shaped, C-shaped, or O-shaped) is desirable.
- the center portion of the laser spot irradiates the empty portion such as a notch in the partial electrode, and the edge portion of the laser spot irradiates the peripheral portion such as the notch in the partial electrode.
- a display panel on which the above active matrix substrate is mounted can also be said to be the present invention.
- a display device equipped with such a display panel can also be said to be the present invention.
- a substrate a switching element attached to the substrate, a gate signal line connected to the gate electrode of the switching element, a source signal line connected to the source electrode of the switching element, a drain electrode of the switching element, and a part of the drain electrode Irradiating a portion of the active matrix substrate including a partial electrode, a capacitive signal line facing the partial electrode, and an insulating film interposed between the partial electrode and the capacitive signal line to supply laser energy
- the laser irradiation method is as follows. That is, the amount of laser energy received by the insulating film is changed depending on whether light is blocked by the partial electrodes.
- the amount of laser energy received is different between the insulating film covered by the partial electrode and the insulating film not covered by the partial electrode.
- the partial electrode absorbs the laser energy supplied to a part of the insulating film, the amount of laser energy received by a part of the insulating film covered by the partial electrode, and other insulating films (covering the partial electrode). There is a difference in the amount of laser energy received by the insulating film. Then, although the intensity of the laser does not change, various laser energy can be supplied to the irradiated member, and the laser energy can be supplied according to necessary processing.
- a laser that passes through a part that transmits light instead of being shielded by a partial electrode supplies laser energy to the insulating film, forms a contact hole in the insulating film, and a laser corresponding to a part that shields light from the partial electrode It is desirable to melt a part of the partial electrode with energy and weld the partial electrode to the capacitive signal line through the contact hole.
- a part of the partial electrode is surely welded to the capacitive signal line through the contact hole, and a signal flowing through the capacitive signal line is supplied to the pixel in place of the source signal.
- the bright spot becomes inconspicuous.
- the central portion of the relatively strong laser spot hits the insulating film without passing through the partial electrode, and a contact hole is surely formed.
- the edge portion of the laser spot having a relatively low laser intensity hits the partial electrode, the partial electrode is surely welded to the capacitive signal line through the contact hole without being melted and scattered. .
- the partial electrode is formed with a notch or an opening, and the portion that is shielded by the partial electrode is the peripheral portion of the notch or the peripheral portion of the aperture, and the partial electrode transmits light instead of shielding light. It is desirable that the part to be formed is a notch empty part or an opening empty part.
- the edge portion of the laser spot is irradiated to the peripheral portion of the notch or the peripheral portion of the opening, and the shape of the irradiated portion is set to an enclosing shape surrounding the notch empty portion or an opening surrounding the opening empty portion (for example, , L-shape, V-shape, U-shape, C-shape, or O-shape).
- the active matrix substrate when the active matrix substrate is irradiated with laser, the amount of laser energy received by the irradiated member can be changed. Therefore, it becomes possible to supply laser energy according to the required processing.
- FIG. 2 is a cross-sectional view taken along line A-A ′ in the partial cross-sectional view of the liquid crystal display panel of FIG. 1.
- FIG. 4 is a cross-sectional view taken along line B-B ′ in the partial cross-sectional view of the liquid crystal display panel of FIG. 1.
- These are sectional drawings which show the liquid crystal display panel in which the 2nd contact hole etc. were formed by laser irradiation. These are the elements on larger scale of FIG.
- FIG. 5 in which the position of the laser spot changed.
- FIG. 8 is another example of FIGS.
- FIG. 15 is a cross-sectional view taken along the line b-b ′ in the partial cross-sectional view of the liquid crystal display panel of FIG. 14. These are sectional views showing a conventional liquid crystal display panel in which contact holes and the like are formed by laser irradiation. These are sectional drawings which show the conventional liquid crystal display panel in which the contact hole was not formed by laser irradiation.
- the liquid crystal display device includes a backlight unit that is a lighting device and a liquid crystal display panel that can display an image by receiving light from the backlight unit.
- the liquid crystal display panel 49 includes a color filter substrate 39, an active matrix substrate, and the like. 29, the liquid crystal 41 is sandwiched (a spacer (not shown) is provided between the color filter substrate 39 and the active matrix substrate 29 to secure an interval for sandwiching the liquid crystal 41).
- the color filter substrate 39 includes a first transparent substrate TB1, a color filter 31, a black matrix 32, an overcoat layer 33, a common electrode 34, and a first alignment film AL1.
- the first transparent substrate TB1 is an insulating and transmissive substrate and serves as a base for the color filter substrate 39.
- the material of the first transparent substrate TB1 is not particularly limited, and may be glass or resin, for example.
- the color filter 31 is a filter that transmits light traveling outside through the liquid crystal 41 by overlapping one surface of the first transparent substrate TB1 facing the liquid crystal 41 side. That is, the color filter 31 supplies light colored by transmitting light to the outside.
- color filters 31 of red (RED), green (GREEN), and blue (BLUE) which are the three primary colors of light.
- the red color filter 31R, the green color filter 31G, and the blue color filter 31B are arranged with a certain regularity.
- a delta arrangement in which the color filters 31R, 31G, and 31B are arranged in a triangular shape, a stripe arrangement in which the color filters 31R, 31G, and 31B are alternately arranged in a row, and a mosaic arrangement in which the color filters 31R, 31G, and 31B are arranged in a mosaic shape Can be mentioned.
- the black matrix 32 overlaps one surface of the first transparent substrate TB1 facing the liquid crystal 41 side.
- the black matrix 32 is divided by individually enclosing the color filters 31 of the respective colors (the divided area becomes one pixel).
- the black matrix 32 is made of a reflective metal (for example, aluminum, chrome, or silver). For this reason, light does not pass from one color filter 31 to the other color filter 31 through the boundary between the color filters 31. That is, the black matrix 14 ensures the light blocking property of each pixel (mixing of light is prevented).
- the overcoat layer 33 is an acrylic resin layer, for example, and protects the color filter 31 and the black matrix 32 by overlapping them.
- the common electrode 34 is a transparent conductive electrode facing the liquid crystal 41 while being superimposed on the overcoat layer 33.
- the common electrode 34 sandwiches the liquid crystal 41 with a pixel electrode 24 of an active matrix substrate 29 described later, and applies a control voltage to the liquid crystal 41 (note that a signal supplied to the common electrode is a common electrode). Called signal).
- the material of the common electrode 34 is not particularly limited, and examples thereof include ITO (Indium Tin Oxide).
- the first alignment film AL1 is a film that directly touches the liquid crystal 41 by overlapping the common electrode 34.
- the first alignment film AL1 sandwiches the liquid crystal 41 with a second alignment film AL2 of the active matrix substrate 29 described later, and aligns the alignment of the liquid crystal 41 in a certain direction.
- the active matrix substrate 29 includes a second transparent substrate TB2, a gate signal line 21, a source signal line 22, a TFT (Thin Film Transistor) 10, an interlayer insulating film 23, a pixel electrode 24, a second alignment film AL2, and a capacitance signal line 25. including.
- TFT Thin Film Transistor
- the second transparent substrate (substrate) TB2 is an insulating and transmissive substrate like the first transparent substrate TB1 of the color filter substrate 39.
- the second transparent substrate TB2 becomes a base of the active matrix substrate 29.
- the material of the second transparent substrate TB2 is not particularly limited as in the case of the first transparent substrate TB1, and for example, it may be glass or resin.
- the gate signal line 21 is a lead that supplies a gate signal, which is a control signal, to the TFT 10 under the control of a gate driver (not shown). Note that the gate signal lines 21 are arranged in a row on the one surface facing the liquid crystal 41 on the second transparent substrate TB2.
- the source signal line 22 is a lead that supplies a source signal (image data) to the pixel through the TFT 10 under the control of a source driver (not shown).
- the source signal lines 22 are arranged in a row in a direction crossing the parallel direction of the gate signal lines 21. For this reason, a region divided by the source signal line 22 and the gate signal line 21 is in a matrix shape, and one divided region is a pixel.
- the TFT 10 is a semiconductor switching element that is formed near the intersection of the source signal line 22 and the gate signal line 21 and controls the operation of each pixel. That is, the TFT 10 is a transistor for writing image data.
- the TFT (switching element) 10 includes a gate electrode 11, a gate insulating film 12, a semiconductor layer 13, a source electrode 14, and a drain electrode 15.
- the gate electrode 11 is formed by a part of the gate signal line 21. Therefore, the gate electrode 11 is formed on one surface facing the liquid crystal 41 on the second transparent substrate TB2 (note that the protruding direction of the gate electrode 11 with respect to the gate signal line 21 is the same direction as the extending direction of the source signal line 22). Yes; see Figure 1).
- the gate insulating film (insulating film) 12 is formed so as to cover the gate electrode 11 and prevents the occurrence of leakage current (leakage current).
- the semiconductor layer 13 is formed on the gate electrode 11 via the gate insulating film 12. Then, using the characteristics of the semiconductor layer 13, the TFT 10 controls the flow of the source signal according to the voltage applied to the gate electrode 11.
- the material of the semiconductor layer 13 includes, for example, amorphous silicon, but is not limited to this.
- the source electrode 14 is formed so as to cover the semiconductor layer 13 and the gate insulating film 12 and is formed by a part of the source signal line 22 (note that the source electrode 14 protrudes from the source signal line 22) Is the same as the extending direction of the gate signal line 21; see FIG.
- the drain electrode 15 is formed so as to cover the semiconductor layer 13 and the gate insulating film 12 similarly to the source electrode 14. That is, the drain electrode 15 and the source electrode 14 face each other on the semiconductor layer 13 and the gate insulating film 12. Then, the flow of current from the source electrode 14 to the drain electrode 15 is controlled according to the voltage applied to the gate electrode 11.
- the drain electrode 15 is extended so as to overlap a capacitance signal line 25 described later (details will be described later).
- the interlayer insulating film 23 covers the TFT 10 to ensure insulation between the TFT 10 and other members (for example, the pixel electrode 24).
- the interlayer insulating film 23 also serves to cover the uneven TFT 10 in order to form the pixel electrode 24 flat.
- the pixel electrode 24 is an electrode formed of, for example, ITO like the common electrode 34, and overlaps the flat interlayer insulating film 23.
- the pixel electrode 24 is electrically connected to the drain electrode 15 (specifically, a later-described auxiliary capacitance electrode 26) through the first contact hole HL1 formed in the interlayer insulating film 23. Therefore, when the TFT 10 is turned on, the source signal flows to the pixel electrode 24 through the drain electrode 15, and when the TFT 10 is turned off, the supply of the source signal to the pixel electrode 24 is interrupted.
- the voltage applied to the liquid crystal 41 sandwiched between the pixel electrode 24 and the common electrode 34 is controlled in accordance with the application of the voltage to the pixel electrode 24 (note that the pixel electrode 24 and the common electrode sandwiching the liquid crystal 41 are controlled.
- the electrode 34 forms a liquid crystal capacitance).
- the second alignment film AL2 is a film that directly touches the liquid crystal 41 by overlapping the pixel electrode 24.
- the second alignment film AL2 sandwiches the liquid crystal 41 with the first alignment film AL1 of the color filter substrate 39, and aligns the alignment of the liquid crystal 41 in a certain direction.
- the capacitance signal line 25 is a conducting wire for supplying a signal for forming an auxiliary capacitance, and is arranged in the same direction as the gate signal line 21 and located between the gate signal lines 21 surrounding each pixel. Similarly to the gate electrode 11 and the gate signal line 21, the capacitive signal line 25 is formed on one surface facing the liquid crystal 41 on the second transparent substrate TB ⁇ b> 2 and is covered with the gate insulating film 12.
- one end 26 of the drain electrode 15 (one end not connected to the TFT 10) extends so as to overlap the capacitive signal line 25. Therefore, the capacitance signal line 25 and one end 26 of the drain electrode 15 face each other through the gate insulating film 12 serving as a dielectric layer to form an auxiliary capacitance (note that one end 26 of the drain electrode 15 is connected to the auxiliary capacitance electrode 26. Called).
- an image is displayed as follows on the liquid crystal display panel 49 in which the liquid crystal (for example, nematic liquid crystal) 41 is sandwiched between the two substrates TB1 and TB2 having a multilayer structure.
- the liquid crystal for example, nematic liquid crystal
- the source signal line 22 is connected through the source electrode 14 and the drain electrode 15 of the TFT 10.
- the source signal voltage at is supplied to the pixel electrode 24.
- the voltage of the source signal is written into the liquid crystal (liquid crystal capacitor) sandwiched between the pixel electrode 24 and the common electrode 34.
- the TFT 10 when the TFT 10 is OFF, the source signal voltage is held by the liquid crystal capacitor and the auxiliary capacitor (until the period until the next source signal voltage is applied, the source signal voltage is supplied by the liquid crystal capacitor and the auxiliary capacitor. Voltage is maintained). That is, by repeating ON / OFF of the TFT 10, the liquid crystal 41 changes the light transmission amount, and an image is displayed on the liquid crystal display panel 49.
- the liquid crystal display panel 49 as described above is inspected for the presence of defective pixels before shipment.
- a voltage that causes the liquid crystal 41 to display black is applied to the normally white mode liquid crystal display panel 49 via the pixel electrode 24 and the common electrode 34.
- the pixel is detected as a defect (Note that this inspection may be performed by human vision or automatically. This may be done with a device that detects bright spots).
- a signal flowing through the capacitance signal line 25 is supplied to the pixel electrode 24 through the drain electrode 15 in place of the source signal (a method for realizing this is a defect). Also called a correction method).
- the pixel electrode 24 is supplied with a signal flowing through the capacitance signal line 25 and can apply a voltage to the liquid crystal 41 together with the common electrode 34.
- a part of the active matrix substrate 29 is irradiated with laser as follows. First, a part from the auxiliary capacitance electrode 26 of the drain electrode 15 to the TFT 10 is cut by a laser, for example, a laser with a wavelength of 1064 nm by a YAG laser (note that a number 51 is given to the cut portion). Thereby, the supply of the source signal to the pixel electrode 24 is reliably cut off.
- a laser for example, a laser with a wavelength of 1064 nm by a YAG laser (note that a number 51 is given to the cut portion).
- the auxiliary capacitor electrode 26 that overlaps the capacitor signal line 25 is irradiated with laser through the gate insulating film 12 (note that the capacitor signal line 25 is viewed from the direction perpendicular to the in-plane direction of the liquid crystal display panel 49).
- a cutout 27 is formed in the outer edge portion of the auxiliary capacitance electrode (partial electrode) 26 (more specifically, the cutout 27 gathers to form a comb-like outer edge portion). Then, a part of the light in the laser (a part of the laser spot SP) passes through the empty part 27P of the notch 27 as shown in FIG. 3 which is a cross-sectional view taken along the line BB ′ of FIG. The insulating film 12 is reached. Further, another part of the light in the laser reaches the peripheral portion 27S of the notch 27 in the auxiliary capacitance electrode 26.
- the amount of laser energy received by the gate insulating film 12 varies depending on whether or not light is blocked by the auxiliary capacitance electrode 26. More specifically, the amount of laser energy received differs between the gate insulating film 12 covered with the auxiliary capacitance electrode 26 and the gate insulating film 12 not covered with the auxiliary capacitance electrode 26.
- the storage capacitor electrode 26 absorbs the laser energy supplied to a part of the gate insulating film 12, and the amount of laser energy received by a part of the gate insulating film 12 covered by the storage capacitor electrode 26, and the others There is a difference in the amount of laser energy received by the gate insulating film 12 (gate insulating film 12 not covered by the auxiliary capacitance electrode 26). Then, although the intensity of the laser does not change, various laser energy can be supplied to the irradiated member, and the laser energy can be supplied according to necessary processing.
- the intensity of the laser is set to be relatively low.
- the second contact hole HL2 for connecting the auxiliary capacitance electrode 26 and the capacitance signal line 25 (for short-circuiting) is formed in the gate insulating film 12 covered with the auxiliary capacitance electrode 26.
- a cutout 27 is formed in the auxiliary capacitance electrode 26, it is preferable to irradiate the cutout 27 with a laser that does not melt the auxiliary capacitance electrode 26 excessively.
- the peripheral portion 27S of the notch 27 that overlaps the laser spot SP (the portion that is shielded from light by the partial electrode) is appropriately melted.
- the laser spot SP that overlaps the empty portion 27P of the notch 27 (the portion that transmits light instead of being blocked by the partial electrode) supplies laser energy to the gate insulating film 12 without passing through the auxiliary capacitance electrode 26. Therefore, relatively high laser energy is supplied to the gate insulating film 12. Therefore, the second contact hole HL2 is reliably formed in the gate insulating film 12.
- the laser that has passed through the empty portion 27P of the notch 27 in the auxiliary capacitance electrode 26 supplies laser energy to the gate insulating film 12,
- the second contact hole HL2 is reliably formed in the gate insulating film 12.
- the peripheral energy 27 of the auxiliary capacitor electrode 26 is melted by the laser energy corresponding to the peripheral portion 27S of the notch 27, and is reliably welded to the capacitive signal line 25 through the second contact hole HL2 (note that the auxiliary capacitance is melted). Since the electrode 26 surrounds the second contact hole HL2, a part of the auxiliary capacitance electrode 26 melted in the second contact hole HL2 easily flows in, and the auxiliary capacitance electrode 26 is easily short-circuited to the capacitance signal line 25). Then, the signal flowing through the capacitance signal line 25 is supplied to the pixel electrode 24 (that is, the pixel) instead of the source signal, and the bright spot becomes inconspicuous.
- the notch width W27 of the notch 27 is larger than the diameter of the laser spot SP (laser spot diameter; symbol W). Therefore, the empty portion 27P of the notch 27 passes the light of the central portion SPc of the laser spot SP and guides it to the gate insulating film 12, and the peripheral portion 27S of the notch 27 is the light of the edge portion SPs of the laser spot SP. Receive.
- the edge portion SPs of the laser spot SP is irradiated to the peripheral portion 27S that is shielded by the auxiliary capacitance electrode 26, and the laser spot SP is irradiated to the empty portion 27P that transmits light instead of being shielded by the auxiliary capacitance electrode 26.
- the central portion SPc is irradiated.
- the central portion SPc of the relatively strong laser spot SP hits the gate insulating film 12 without passing through the auxiliary capacitance electrode 26, and the second contact hole HL2 is surely formed.
- the edge portion SPs of the laser spot SP having a relatively low laser intensity corresponds to the peripheral portion 27S of the notch 27 in the auxiliary capacitance electrode 26, the peripheral portion 27S is not melted too much and scattered. It is surely welded to the capacitance signal line through the contact hole HL2 (note that the shading indicating the laser in FIG. 3 means that the dark portion has a higher laser intensity than the light portion).
- the presence or absence of light shielding by the auxiliary capacitance electrode 26 and the difference in intensity distribution of the laser itself enables further supply of laser energy according to the required processing.
- the second contact hole HL2 can be reliably formed, and the auxiliary capacitance electrode 26 and the capacitance signal line 25 can be short-circuited reliably.
- the shape of the overlapping portion of the peripheral portion 27S of the cutout 27 and the edge portion SPs of the laser spot SP may be a U-shape surrounding the empty portion 27P of the cutout 27 (see the thick dotted line in FIG. 5). Or may be L-shaped (see the thick dotted line in FIG. 6).
- the shape of the overlapping portion is also changed. For example, as shown in FIG. 7, when the peripheral portion 27 ⁇ / b> S corresponding to the bottom of the notch 27 is curved, the overlapping portion tends to be C-shaped. Further, as shown in FIG. 8, when the peripheral edge portion 27S corresponding to the bottom of the notch 27 is tapered, the overlapping portion tends to be V-shaped.
- the peripheral portion 27S corresponding to the bottom of the notch 27 may have a shape having a bending point.
- the overlapping portion has a shape surrounding the empty portion 27P of the notch 27 (see the thick dotted line in FIGS. 9 and 10).
- the cutout 27 is formed in the auxiliary capacitance electrode 26.
- the present invention is not limited to this, and an opening 28 is formed in the auxiliary capacitance electrode 26 as shown in the partial plan view of FIG. May be. This is because the amount of laser energy received by the gate insulating film 12 varies depending on the presence of a laser that passes through the aperture 28 and a laser that does not pass through the aperture 28, that is, whether or not light is blocked by the auxiliary capacitance electrode 26 (required). In spite of the fact that the laser intensity does not change, various laser energy can be supplied to the irradiated member, and laser energy can be supplied according to necessary processing).
- the same defect correction as the active matrix substrate 29 on which the auxiliary capacitance electrode 26 having the notch 27 is mounted can be performed.
- laser energy is supplied to the gate insulating film 12 by a laser that has passed through the aperture 28 that allows light to pass through the auxiliary capacitance electrode 26, and the second contact hole HL 2 is formed in the gate insulating film 12. Further, the peripheral portion 28S is melted by the laser energy of the laser that is shielded by the auxiliary capacitance electrode 26 (peripheral portion 28S of the opening 28), and the auxiliary capacitive electrode 26 is connected to the capacitive signal line 25 through the second contact hole HL2. Welds. As a result, the signal flowing through the capacitance signal line 25 is supplied to the pixel electrode 24 instead of the source signal, and the bright spot becomes inconspicuous.
- the aperture width W28 of the aperture 28 is narrower than the diameter of the laser spot SP, a vacant portion 28P of the aperture 28 in the auxiliary capacitance electrode 26 (a portion where light is transmitted but not blocked by the partial electrode). Then, the light of the central portion SPc of the laser spot SP is passed and guided to the gate insulating film 12.
- the peripheral portion 28S (portion shielded by the partial electrode) of the opening 28 in the auxiliary capacitance electrode 26 receives the light of the edge portion SPs of the laser spot SP.
- the central portion SPc of the relatively intense laser spot SP hits the gate insulating film 12 without passing through the auxiliary capacitance electrode 26, and the second contact hole HL2 is reliably formed.
- the edge portion SPs of the laser spot SP having a relatively low laser intensity corresponds to the peripheral portion 28S of the opening 28 in the auxiliary capacitance electrode 26, the peripheral portion 28S is not melted too much and scattered. 2 is reliably welded to the capacitance signal line 25 via the contact hole HL2.
- the central portion SPc of the laser spot SP is used as a vacant portion 28P of the opening 28 in the auxiliary capacitance electrode 26, and the edge portion SPs of the laser spot SP is used as the opening 28 in the auxiliary capacitance electrode 26.
- the following is preferable.
- the shape of the overlapping portion of the peripheral portion 28S of the opening 28 and the edge portion SPs of the laser spot SP may be an O-shape surrounding the empty portion 28P of the opening 28 (the very thick portion in FIG. 12). It may be C-shaped (see dotted line) (see very thick dotted line in FIG. 13). In short, it is preferable that the overlapping portion has a shape surrounding the empty portion 28P of the opening 28.
- the peripheral portion 27S of the notch 27 or the peripheral portion 28S of the opening 28 is irradiated with the edge portion SPs of the laser spot SP, and the shape of the irradiated portion is a surrounding shape or an opening surrounding the empty portion 27P of the notch 27. It is desirable to form a surrounding shape (for example, an L shape, a V shape, a U shape, a C shape, or an O shape) that surrounds the 28 empty portions 28P.
- a surrounding shape for example, an L shape, a V shape, a U shape, a C shape, or an O shape
- the number of the apertures 28 or notches 27 formed in the auxiliary capacitance electrode 26 may be singular or plural. This is because, if there is at least one aperture 28 or notch 27, the laser spot SP is irradiated there, so that various laser energy can be supplied to the irradiated member, depending on the required processing. This is because laser energy can be supplied.
- the auxiliary capacitance electrode 26 (and consequently the drain electrode 15) is melted by the laser energy. Therefore, the material is not particularly limited as long as it is a conductor that can be melted with a constant laser energy (for example, a metal may be used). Similarly, the gate insulating film 12 is melted by laser energy. Therefore, the material is not particularly limited as long as it is an insulator that can be melted with a constant laser energy (for example, a resin may be used).
- a YAG (Yttrium Aluminum Garnet) laser is used as an example of the laser.
- the present invention is not limited to this, and another laser may be used.
- Laser irradiation may be performed by an automatic control type defect correction apparatus (laser irradiation apparatus) equipped with a laser transmitter, or may be performed by other methods.
- the microcomputer unit built in the defect correction apparatus adjusts the laser irradiation position (position of the laser spot SP). .
- This adjustment is realized by a laser spot position adjustment program.
- this program is a program that can be executed by a computer, and may be recorded on a computer-readable recording medium. This is because the program recorded on the recording medium becomes portable.
- Examples of the recording medium include a tape system such as a separated magnetic tape and a cassette tape, a disk system of an optical disk such as a magnetic disk and a CD-ROM, a card system such as an IC card (including a memory card) and an optical card. Or a semiconductor memory system such as a flash memory.
- a tape system such as a separated magnetic tape and a cassette tape
- a disk system of an optical disk such as a magnetic disk and a CD-ROM
- a card system such as an IC card (including a memory card) and an optical card.
- a semiconductor memory system such as a flash memory.
- the microcomputer unit may acquire the laser spot position adjustment program by communication from the communication network.
- the communication network includes the Internet, infrared communication, etc. regardless of wired wireless.
- a liquid crystal display device has been described as an example of a display device, but the present invention is not limited to this.
- a plasma display device, an organic EL (Electro-Luminescence) display device, or the like may be used.
- any display panel or display device on which the active matrix substrate 29 is mounted may be used.
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- Microelectronics & Electronic Packaging (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
Description
実施の一形態について、図面に基づいて説明すれば、以下の通りである。なお、便宜上、ハッチングおよび部材符号等を省略する場合もあるが、かかる場合、他の図面を参照するものとする。
なお、本発明は上記の実施の形態に限定されず、本発明の趣旨を逸脱しない範囲で、種々の変更が可能である。
11 ゲート電極
12 ゲート絶縁膜(絶縁膜)
HL2 第2コンタクトホール(コンタクトホール)
13 半導体層
14 ソース電極
15 ドレイン電極
21 ゲート信号線
22 ソース信号線
23 層間絶縁膜
HL1 第1コンタクトホール
24 画素電極
25 容量信号線
26 補助容量電極(部分電極)
27 切欠
27P 切欠の空き部分(部分電極にて遮光ではなく通光をなす
部分)
27S 切欠の周縁部分(部分電極にて遮光をなす部分)
W27 切欠幅
28 開孔
28P 開孔の空き部分(部分電極にて遮光ではなく通光をなす
部分)
28S 開孔の周縁部分(部分電極にて遮光をなす部分)
W28 開孔幅
SP レーザスポット
SPc レーザスポットの中心部分
SPs レーザスポットの縁部分
W レーザスポットの径
TB2 第2透明基板(基板)
AL2 第2配向膜
29 アクティブマトリックス基板
31 カラーフィルタ
32 ブラックマトリックス
33 オーバーコート層
34 コモン電極
TB1 第1透明基板
AL1 第1配向膜
39 カラーフィルタ基板
49 液晶表示パネル
Claims (12)
- 基板と、
上記基板に取り付けられたスイッチング素子と、
上記スイッチング素子のゲート電極につながるゲート信号線と、
上記スイッチング素子のソース電極につながるソース信号線と、
上記スイッチング素子のドレイン電極と、
上記ドレイン電極の一部である部分電極と、
上記部分電極に対向する容量信号線と、
上記部分電極と上記容量信号線との間に介在する絶縁膜と、
が含まれ、
上記部分電極には、切欠または開孔が形成されるアクティブマトリックス基板。 - レーザ照射によって、上記部分電極の一部と上記容量信号線とが溶着される場合、
上記切欠の切欠幅または上記開孔の開孔幅が、レーザスポット径よりも狭いことで、
上記切欠の空き部分または上記開孔の空き部分が、レーザスポットの中心部分の光を通過させ、上記絶縁膜に導き、
上記部分電極の一部である上記切欠の周縁部分または上記開孔の周縁部分が、レーザスポットの縁部分の光を受ける請求項1に記載のアクティブマトリックス基板。 - 上記切欠の周縁部分または上記開孔の周縁部分と、上記レーザスポットの縁部分との重畳部分の形状が、上記切欠の空き部分を囲む囲み状または上記開孔の空き部分を囲む囲み状である請求項2に記載のアクティブマトリックス基板。
- 上記囲み状とは、L字状、V字状、U字状、C字状、またはO字状である請求項3に記載のアクティブマトリックス基板。
- 請求項1~4のいずれか1項に記載のアクティブマトリックス基板を搭載する表示パネル。
- 請求項5に記載の表示パネルを搭載する表示装置。
- 基板と、
上記基板に取り付けられたスイッチング素子と、
上記スイッチング素子のゲート電極につながるゲート信号線と、
上記スイッチング素子のソース電極につながるソース信号線と、
上記スイッチング素子のドレイン電極と、
上記ドレイン電極の一部である部分電極と、
上記部分電極に対向する容量信号線と、
上記部分電極と上記容量信号線との間に介在する絶縁膜と、
を含むアクティブマトリックス基板の一部分にレーザを照射し、レーザエネルギーを供給するレーザ照射方法にあって、
上記絶縁膜の受けるレーザエネルギー量を、上記部分電極による遮光の有無で変えるレーザ照射方法。 - 上記部分電極にて遮光ではなく通光をなす部分を経たレーザで、上記絶縁膜にレーザエネルギーを供給し、その絶縁膜にコンタクトホールを形成させ、
上記部分電極にて遮光をなす部分にあたるレーザのレーザエネルギーで、上記部分電極の一部を溶かし、上記コンタクトホールを通じて、上記容量信号線に上記部分電極を溶着させる請求項7に記載のレーザ照射方法。 - 上記部分電極にて遮光をなす部分に、レーザスポットの縁部分を照射させ、
上記部分電極にて遮光ではなく通光をなす部分に、レーザスポットの中心部分を照射させる請求項7または8に記載のレーザ照射方法。 - 上記部分電極には、切欠または開孔が形成されており、
上記部分電極にて遮光をなす部分が、上記切欠の周縁部分または上記開孔の周縁部分であり、
上記部分電極にて遮光ではなく通光をなす部分が、上記切欠の空き部分または上記開孔の空き部分である請求項7~9のいずれか1項に記載のレーザ照射方法。 - レーザスポットの縁部分を、上記切欠の周縁部分または上記開孔の周縁部分に照射させ、その照射部分の形状を、上記切欠の空き部分を囲む囲み状または上記開孔の空き部分を囲む囲み状にする請求項10に記載のレーザ照射方法。
- 上記囲み状とは、L字状、V字状、U字状、C字状、またはO字状である請求項11に記載のレーザ照射方法。
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US13/260,027 US20120012854A1 (en) | 2009-04-10 | 2009-12-28 | Active matrix substrate, display panel, display device, and laser irradiation method |
CN2009801583758A CN102365668A (zh) | 2009-04-10 | 2009-12-28 | 有源矩阵基板、显示面板、显示装置和激光照射方法 |
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CN103777379B (zh) * | 2012-10-17 | 2017-01-04 | 北京京东方光电科技有限公司 | 一种液晶显示屏亮点检测方法 |
CN105745698B (zh) * | 2013-11-14 | 2019-06-18 | 堺显示器制品株式会社 | 电路基板和显示装置 |
CN103792747B (zh) * | 2014-02-10 | 2016-05-04 | 北京京东方显示技术有限公司 | 一种阵列基板及其制作方法、修复方法及显示装置 |
US10578937B2 (en) * | 2016-12-21 | 2020-03-03 | HKC Corporation Limited | Method and apparatus of repairing transistor |
CN109244085A (zh) * | 2018-09-27 | 2019-01-18 | 惠科股份有限公司 | 一种阵列基板及显示面板 |
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