WO2012029281A1 - アクティブマトリクス基板及びその製造方法並びに表示装置 - Google Patents
アクティブマトリクス基板及びその製造方法並びに表示装置 Download PDFInfo
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- WO2012029281A1 WO2012029281A1 PCT/JP2011/004797 JP2011004797W WO2012029281A1 WO 2012029281 A1 WO2012029281 A1 WO 2012029281A1 JP 2011004797 W JP2011004797 W JP 2011004797W WO 2012029281 A1 WO2012029281 A1 WO 2012029281A1
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- insulating film
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
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- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/08—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body
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- 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
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- 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
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Definitions
- the present invention relates to an active matrix substrate, a manufacturing method thereof, and a display device.
- a liquid crystal display device is provided between a TFT substrate and a counter substrate, a TFT substrate which is an active matrix substrate on which a plurality of thin film transistors (TFTs) are formed, a counter substrate facing the TFT substrate, and the TFT substrate. And a liquid crystal layer.
- a seal member is provided between the TFT substrate and the counter substrate for bonding the TFT substrate and the counter substrate to each other and enclosing the liquid crystal layer.
- a display area in which a plurality of pixels are arranged to perform display and a non-display area provided around the display area are formed.
- the seal member is disposed in the non-display area.
- the TFT substrate has a glass substrate on which the TFT and the like are formed.
- An interlayer insulating film covering the TFT is formed on the glass substrate, and a pixel electrode made of ITO (Indium Tin Oxide) is formed on the surface thereof.
- the interlayer insulating film is formed of, for example, an organic insulating film such as photosensitive acrylic resin.
- Patent Document 1 in order to increase the adhesive strength between a sealing member and a TFT substrate, an interlayer insulating film made of an organic insulating film is removed in a region where the sealing member is formed, and the glass constituting the TFT substrate is disclosed. It is disclosed that a substrate or an inorganic insulating film (such as a passivation film or a gate insulating film) is exposed.
- Patent Document 2 as shown in FIG. 53, in the TFT substrate 100, a region where the signal line 107 and the drain electrode 103 of the TFT 105 overlap with the flat surface of the overcoat film 109 covering the TFT 105 and the signal line 107. It is disclosed that a protective film 110 that overlaps a slightly larger area is provided, and that the protective film 110 is formed of the same material (ITO) as the pixel electrode 104. Accordingly, even if the overcoat film 109 has a defect, the signal line 107 under the defect is prevented from being disconnected.
- ITO the material
- a predetermined mark in a non-display area of the TFT substrate.
- This mark measures, for example, a mark for alignment between the TFT substrate and the counter substrate, a mark for measuring a shift amount between the TFT substrate and the counter substrate, and a shift amount of the dividing line when the glass substrate is cut.
- the mark can be formed of the same material as the gate wiring.
- the non-display area has been reduced, and the ratio of the seal member to the non-display area in the TFT substrate has been increasing. For this reason, it is desired that the mark is disposed so as to overlap the seal member.
- Patent Document 1 when the interlayer insulating film is removed in the region where the sealing member is disposed for the purpose of increasing the adhesive strength between the sealing member and the TFT substrate, the mark is covered with the interlayer insulating film.
- the gate insulating film and the semiconductor layer are only covered. Therefore, if pinholes or cracks are generated in the gate insulating film or the like, the etchant may pass through the gate insulating film or the like when the pixel electrode material covering the gate insulating film or the like is etched. As a result, there is a problem that the mark is etched by the etchant, and the mark is lost or lost.
- the present invention has been made in view of such various points, and an object of the present invention is to prevent loss of marks provided in the non-display area while reducing the non-display area.
- the active matrix substrate according to the present invention is intended for an active matrix substrate constituting a display device by being bonded to a counter substrate through a frame-shaped seal member.
- the display device includes a display area provided inside a seal area, which is a frame-shaped area where the seal member is provided, and a frame-shaped non-display area formed outside the display area and including the seal area. have.
- an insulating substrate an electrode layer formed on the insulating substrate in the display region, and a mark formed on the insulating substrate in the non-display region and formed of the same material as the electrode layer;
- the mark is removed from the insulating substrate, and the mark is disposed in a region where the second insulating film is removed, and is provided so as to overlap at least a part of the seal region.
- a protective film is formed to cover the side surface of the first insulating film covering the mark and the surface of the first insulating film opposite to the insulating substrate.
- the method for manufacturing an active matrix substrate according to the present invention is directed to a method for manufacturing an active matrix substrate constituting a display device by being bonded to a counter substrate through a frame-shaped seal member.
- the display device includes a display area provided inside a seal area, which is a frame-shaped area where the seal member is provided, and a frame-shaped non-display area formed outside the display area and including the seal area. have.
- the first insulating film covering the mark has, for example, a pinhole or a crack
- the first insulating film is a protective film (material layer) when the material layer is etched. Further, by being covered with the resist pattern, it is possible to prevent the etchant from passing through the first insulating film and missing the mark.
- the resist pattern is formed so that the side surface of the first insulating film covering the mark and the surface of the first insulating film opposite to the insulating substrate are covered with the protective film, the thickness of the first insulating film
- the first insulating film can be covered with the resist pattern even at the edge portion of the mark that is particularly likely to become thin. As a result, it is possible to more reliably prevent the mark from being lost while arranging the mark in the seal area to reduce the non-display area.
- FIG. 1 is a plan view showing an external appearance of a main part of the liquid crystal display device according to the first embodiment.
- FIG. 2 is a cross-sectional view showing the main structure of the liquid crystal display device.
- FIG. 3 is an enlarged plan view showing a corner portion of the TFT substrate.
- FIG. 4 is an enlarged cross-sectional view showing the main structure of the liquid crystal display device.
- FIG. 5 is an enlarged plan view showing a region where a mark is formed on the TFT substrate.
- 6 is a cross-sectional view of the TFT substrate including a cross section taken along line VI-VI in FIG.
- FIG. 7 is a cross-sectional view of the TFT substrate including a cross section taken along line VII-VII in FIG.
- FIG. 8 is a cross-sectional view showing a wiring portion made of a gate material in the peripheral wiring region.
- FIG. 9 is a cross-sectional view showing a wiring portion made of a source material in the peripheral wiring region.
- FIG. 10 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 11 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 12 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 13 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 14 is a cross-sectional view showing a manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 15 is a cross-sectional view showing a manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 16 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 17 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 18 is a cross-sectional view showing a manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 19 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 20 is a cross-sectional view showing a manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 21 is a cross-sectional view showing a manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 22 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 23 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 24 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 25 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 26 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 27 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 28 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 29 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 30 is a cross-sectional view showing a manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 31 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 32 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 33 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 34 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 35 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 36 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 37 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 38 is a cross-sectional view showing the manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 39 is a cross-sectional view showing the manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 40 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 41 is a cross-sectional view showing a manufacturing process around the wiring portion made of the gate material of the TFT substrate.
- FIG. 42 is a cross-sectional view showing a manufacturing process around the wiring portion made of the source material of the TFT substrate.
- FIG. 43 is a cross-sectional view showing a transparent conductive film covered with a resist layer before etching.
- FIG. 44 is a cross-sectional view showing a protective film covered with a resist pattern after etching.
- FIG. 45 is a view corresponding to FIG. 7 showing a cross-sectional structure of the TFT substrate 11 around the mark in the second embodiment.
- FIG. 46 is a view corresponding to FIG. 6 showing a cross-sectional structure of the TFT substrate 11 around the mark in the second embodiment.
- FIG. 47 is a cross-sectional view showing the manufacturing process around the mark on the TFT substrate.
- FIG. 48 is a cross-sectional view showing the protective film covered with the resist pattern after etching.
- FIG. 49 is an enlarged plan view showing a corner portion of the TFT substrate according to the third embodiment.
- FIG. 50 is an enlarged plan view showing the mark in the third embodiment.
- FIG. 51 is an enlarged plan view showing the mark in the third embodiment.
- FIG. 52 is an enlarged plan view showing the mark in the third embodiment.
- FIG. 53 is a cross-sectional view showing the structure
- Embodiment 1 of the Invention 1 to 44 show Embodiment 1 of the present invention.
- FIG. 1 is a plan view showing an external appearance of a main part of the liquid crystal display device 1 according to the first embodiment.
- FIG. 2 is a cross-sectional view showing the main structure of the liquid crystal display device 1.
- FIG. 3 is an enlarged plan view showing a corner portion of the TFT substrate 11.
- FIG. 4 is an enlarged cross-sectional view showing the main structure of the liquid crystal display device 1.
- FIG. 5 is an enlarged plan view showing a region where the mark 25 is formed on the TFT substrate 11.
- 6 is a cross-sectional view of the TFT substrate 11 including a cross section taken along line VI-VI in FIG.
- FIG. 7 is a cross-sectional view of the TFT substrate 11 including a cross section taken along line VII-VII in FIG.
- FIG. 8 is a cross-sectional view showing a wiring portion made of a gate material in the peripheral wiring region 17.
- FIG. 9 is a cross-sectional view showing a wiring portion made of a source material in the peripheral wiring region 17.
- FIG. 43 is a cross-sectional view showing the transparent conductive film covered with the resist layer 54 before etching.
- FIG. 44 is a cross-sectional view showing the protective film 45 covered with the resist pattern 55 after etching.
- liquid crystal display device 1 including a TFT substrate 11 as an active matrix substrate will be described as an example of a display device.
- the liquid crystal display device 1 includes a liquid crystal display panel 10 and a backlight unit (not shown) that is an illumination device arranged to face the liquid crystal display panel 10.
- the liquid crystal display panel 10 includes a TFT substrate 11 which is a first substrate configured as an active matrix substrate, and a second substrate disposed so as to face the TFT substrate 11. And the liquid crystal layer 13 sealed between the TFT substrate 11 and the counter substrate 12.
- the counter substrate 12 has a rectangular glass substrate 22 which is an insulating substrate on which a color filter (not shown), a common electrode (not shown) and the like are formed.
- a frame-shaped seal member 14 is interposed between the TFT substrate 11 and the counter substrate 12 for bonding the TFT substrate 11 and the counter substrate 12 to each other.
- the liquid crystal layer 13 is surrounded by a seal member 14.
- the seal member 14 is made of, for example, an ultraviolet curable epoxy resin.
- the liquid crystal display panel 10 includes a display area 15 provided inside a seal area 20 that is a frame-shaped area where the seal member 14 is provided, and a display area 15. And a frame-like non-display area 16 including the seal area 20.
- alignment films are respectively formed on the surface of the TFT substrate 11 and the counter substrate 12 on the liquid crystal layer 13 side.
- the display area 15 is an area in which an image is displayed, and a plurality of pixels (not shown) arranged in a matrix are formed in the display area 15.
- a peripheral wiring area 17 is formed between the seal area 20 and the display area 15.
- the TFT substrate 11 is a rectangular glass substrate 21 which is an insulating substrate on which a plurality of source wirings (not shown) extending in parallel with each other and a plurality of gate wirings (not shown) extending perpendicularly to these are formed. have.
- the glass substrate 21 is further formed with a plurality of Cs wirings (not shown) extending along the respective gate wirings.
- the Cs wiring is a wiring for applying a predetermined voltage to the auxiliary capacitor formed in each pixel.
- a plurality of terminals are formed, and a terminal area 19 on which a driver chip 18 for driving the liquid crystal display panel 10 is mounted is formed.
- the peripheral wiring region 17 includes first wiring such as lead wiring (not shown), COM wiring (not shown), and inspection wiring (not shown) made of the same material as the gate wiring.
- a part 41 and second wiring parts 42 such as lead lines (not shown) made of the same material as the source wiring, Cs trunk wiring (not shown), and inspection wiring (not shown) are formed.
- the COM wiring is a wiring for applying a predetermined voltage to the common electrode of the counter substrate 12.
- the Cs trunk line is a trunk line connected to the plurality of Cs lines.
- a pixel electrode 31 and a TFT (Thin-Film Transistor) 30 connected to the pixel electrode 31 are formed for each pixel.
- the TFT 30 is configured, for example, as a bottom gate type TFT, and includes a gate electrode 24 that is an electrode layer formed on the surface of the glass substrate 21 in the display region 15 and a gate insulation that is a first insulating film that directly covers the gate electrode 24.
- a film 26 and a semiconductor layer 32 formed on the surface of the gate insulating film 26 are included.
- the gate electrode is made of, for example, an Al alloy single layer film, an Al film, a Cu film, a Mo film, a Ti film, or a laminated film thereof.
- the gate insulating film 26 is made of an inorganic insulating film such as a silicon nitride film (SiNx film), and has a thickness of about 0.4 ⁇ m, for example.
- the semiconductor layer 32 is made of, for example, intrinsic amorphous silicon and n + amorphous silicon.
- ohmic contact layers 34 On the surface of the semiconductor layer 32, ohmic contact layers 34 provided on the left and right sides of the semiconductor layer 32 are formed.
- the ohmic contact layer 34 is made of, for example, n + silicon.
- a black matrix 33 is formed in a region facing the semiconductor layer 32 of the counter substrate 12.
- the black matrix 33 is composed of a black resin film, a metal film having a low reflectance, or the like.
- a source electrode 35 and a drain electrode 36 are formed on the surface of the ohmic contact layer 34. Further, a source wiring 37 connected to the source electrode 35 is formed on the surface of the gate insulating film 26.
- the source wiring 37, the source electrode 35, and the drain electrode 36 are made of, for example, an Al alloy and Mo laminated film, or an Al film, Cu film, Mo film, Ti film, or a laminated film thereof.
- the TFT substrate 11 of the present embodiment has a so-called PixelPOn Pas structure, and the source wiring 37, the source electrode 35, the drain electrode 36, and a part of the gate insulating film 26 are a passivation film 28 and a second insulating film. It is covered with an interlayer insulating film 27.
- the passivation film 28 is made of, for example, a silicon nitride film and has a thickness of 0.1 to 0.7 ⁇ m and a thickness of about 0.3 ⁇ m, for example.
- the interlayer insulating film 27 is made of, for example, an organic insulating film such as photosensitive acrylic resin, and is formed on the surface of the passivation film 28 with a thickness of 1.0 to 4.0 ⁇ m, for example, about 3.0 ⁇ m. Has been.
- a contact hole 39 is formed above the drain electrode 36.
- a pixel electrode 40 made of a transparent conductive film such as ITO is formed on the surface of the interlayer insulating film 27 in the display region 15. The pixel electrode 40 is connected to the drain electrode 36 through the contact hole 39.
- a mark 25 made of the same material as the gate electrode 24 is disposed on the glass substrate 21 in the non-display area 16.
- the mark 25 is an alignment mark used for alignment when the TFT substrate and the counter substrate 12 are bonded to each other, for example.
- the mark 25 is formed, for example, in a rectangular ring pattern when viewed from the normal direction of the surface of the glass substrate 21.
- the length of one side of the outer shape of the mark 25 is, for example, 180 ⁇ m, and the length of the inner side is, for example, 122 ⁇ m.
- a mark 23 is also formed in the non-display area 16 of the counter substrate 12.
- the mark 23 is made of the same material as that for forming the black matrix 33 and is formed in a square having a side length of 100 ⁇ m.
- the counter substrate 12 is aligned with the TFT substrate 11 so that the mark 23 is disposed inside the mark 25.
- the distance between the center line in the left-right direction of the mark 23 and the center line in the left-right direction of the mark 25 is measured by an automatic measuring machine (not shown).
- the amount of deviation is measured.
- an 11 ⁇ m gap is provided between the outer edge of the mark 23 and the inner edge of the mark 25 in a state where the marks 23 and 25 are overlapped without deviation. Yes. Further, no other pattern is arranged within 50 ⁇ m around the marks 23 and 25.
- a gate insulating film 26, which is a first insulating film that directly covers the mark 25, is formed on the glass substrate 21 in the non-display area 16.
- the gate insulating film 26 covering the mark 25 is formed separately from the gate insulating film 26 covering the gate electrode 24 of the TFT 30.
- the interlayer insulating film 27 is removed from the glass substrate 21 in at least a part of the seal region 20, as shown in FIGS. In other words, at least a part of the removal region 29 from which the interlayer insulating film 27 has been removed overlaps with the seal region 20. Further, the peripheral wiring region 17 is not formed in the removal region 29. That is, the peripheral wiring region 17 is formed in the non-display region 16 other than the removal region 29.
- the organic insulating film which is the interlayer insulating film 27 and the sealing member 14 generally have a relatively weak adhesive force. Thus, by removing the interlayer insulating film 27 from at least a part of the sealing region 20, the sealing is performed. It becomes possible to increase the adhesive strength between the member 14 and the TFT substrate 11.
- the mark 25 is disposed in a region where the interlayer insulating film 27 has been removed, and is provided so as to overlap at least a part of the seal region 20. Further, as shown in FIGS. 4, 6, and 7, on the glass substrate 21, the side surface of the gate insulating film 26 covering the mark 25 and the surface on the counter substrate 12 side (that is, covering the mark 25). A protective film 45 is formed to cover the entire surface of the gate insulating film 26 opposite to the glass substrate 21. That is, the entire gate insulating film 26 covering the mark 25 is covered with the protective film 45. The protective film 45 in this embodiment directly covers the side surface of the gate insulating film 26 that covers the mark 25.
- the protective film 45 is made of ITO, which is the same material as the pixel electrode 40. Further, the outer edge portion of the protective film 45 is formed on the surface of the glass substrate 21. A semiconductor layer 52 made of the same material as the semiconductor layer 32 of the TFT 30 is interposed between the gate insulating film 26 covering the mark 25 and the protective film 45.
- the liquid crystal display device 1 is manufactured by laminating a TFT substrate 11 and a counter substrate 12 manufactured in advance through a liquid crystal layer 13 and a seal member 14, respectively.
- the sealing member 14 is drawn in a rectangular frame shape on the counter substrate 12, and the liquid crystal material is dropped into the frame of the sealing member 14 and supplied.
- the counter substrate 12 aligned using the mark 25 is bonded to the TFT substrate 11.
- the sealing member 14 is cured by irradiating the sealing member 14 with ultraviolet rays.
- the liquid crystal display device 1 is manufactured.
- sealing member 14 may be drawn not on the counter substrate 12 but on the TFT substrate 11.
- the liquid crystal material is injected by the dropping method.
- an injection port (not shown) is formed in the frame-shaped sealing member and the dip vacuum injection is performed, the injection is performed.
- a method of sealing the inlet may be used.
- FIGS. 10, 13, 16, 19, 22, 22, 25, 28, 31, 31, 34, 37, and 40 are cross-sectional views showing the manufacturing process around the mark on the TFT substrate.
- FIG. 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, and 42 show the manufacturing process around the wiring portion made of the source material of the TFT substrate. It is sectional drawing.
- the gate electrode 24 is formed on the glass substrate 21 in the display region 15 by the first photolithography step, and the gate electrode 24 is made of the same material as the gate electrode 24 on the glass substrate 21 in the non-display region 16.
- the mark 25 is formed so as to overlap the seal region 20.
- a mark 25 made of, for example, a single layer film of an Al alloy is formed in a rectangular ring shape on the surface of the glass substrate 21 in the seal region 20 of the non-display region 16.
- the gate electrode 24 is formed on the surface of the glass substrate 21 in the display area 15, and the first wiring portion 41 is formed on the surface of the glass substrate 21 in the peripheral wiring area 17 of the non-display area 16.
- a silicon nitride film is formed on the glass substrate 21 to a thickness of about 0.4 ⁇ m, whereby the gate electrode 24, A gate insulating film 26 that directly covers the mark 25 and the first wiring portion 41 is formed. Further, a semiconductor material layer 51 made of, for example, intrinsic amorphous silicon and n + amorphous silicon is formed on the surface of the gate insulating film 26.
- the semiconductor material layer 51 is left on the mark 25 and the formation area of each TFT 30 by the second photolithography process, while the non-display area. Remove at 16. Therefore, as shown in FIGS. 17 and 18, the gate insulating film 26 is exposed in the peripheral wiring region 17.
- the semiconductor layer 32 is formed on the surface of the gate insulating film 26 in the region where the TFT 30 is formed, and the semiconductor layer 52 is formed on the surface of the gate insulating film 26 so as to cover the mark 25.
- a second wiring portion 42 is formed on the surface of the gate insulating film 26 in the peripheral wiring region 17 of the non-display region 16 by a third photolithography process. To do.
- the second wiring portion 42 is formed, for example, by forming an Al alloy film 42a and a Mo film 42b in this order on the gate insulating film 26 and performing photolithography.
- a passivation film 28 and an interlayer insulating film (organic insulating film) 27 are laminated in this order on the entire glass substrate 21.
- the passivation film 28 is formed of a silicon nitride film having a thickness of about 0.3 ⁇ m.
- the interlayer insulating film 27 is formed of a photosensitive acrylic resin having a thickness of about 3.0 ⁇ m.
- the removal region 29 is formed by removing the interlayer insulating film 27 from a part of the non-display region 16 by the fourth photolithography step.
- an interlayer insulating film 27 is formed which covers a part of the gate insulating film 26 and is removed from at least a part of the seal region 20 and the region where the mark 25 is formed.
- the passivation film 28 is removed by etching in the region where the interlayer insulating film 27 is removed, and the gate insulation not covered with the semiconductor layer 52 is performed.
- the film 26 is also removed by etching in the same process.
- the semiconductor layer 52 can be used as a mask. Further, when the gate insulating film 26 is etched, a part of the semiconductor layer 52 is also etched, so that the thickness of the semiconductor layer 52 is reduced.
- a transparent conductive material layer 53 as a material layer covering the gate insulating film 26 and the interlayer insulating film 27 is formed on the glass substrate 21.
- the transparent conductive material layer 53 for example, ITO or IZO (Indium Zinc Oxide) can be applied.
- a resist material is applied to the surface of the transparent conductive material layer 53 to form a resist layer 54.
- the resist layer 54 is patterned to form a resist pattern 55 on the surface of the transparent conductive material layer 53.
- the side portion 57 of the resist pattern 55 in the seal region 20 is disposed outside a portion 58 that covers the side surface of the gate insulating film 26 in the transparent conductive material layer 53.
- a resist pattern 55 is formed in the formation area of each pixel electrode 31.
- the transparent conductive material layer 53 exposed from the resist pattern 55 is etched to cover the mark 25.
- a protective film 45 is formed to cover the side surfaces of the gate insulating film 26 and the counter substrate 12 side of the gate insulating film 26 (the side opposite to the glass substrate 21 of the gate insulating film 26).
- the protective film 45 covers the side surface of the semiconductor layer 52 and the surface of the semiconductor layer 52 on the counter substrate 12 side, and is covered with the resist pattern 55.
- the pixel electrode 31 is formed on the surface of the interlayer insulating film 27 by the transparent conductive material layer 53 that overlaps the resist pattern 55 in the display region 15.
- the resist pattern 55 is removed from the glass substrate 21 to manufacture the TFT substrate 11.
- Embodiment 1- Therefore, according to the first embodiment, even when the gate insulating film 26 covering the mark 25 has, for example, pinholes or cracks, the gate insulating film 26 is not etched when the transparent conductive material layer 53 is etched. Covering with the protective film 45 and the resist pattern 55 can prevent the etchant from passing through the gate insulating film 26 and causing the mark 25 to be lost.
- the resist pattern 55 is formed so that the side surface of the gate insulating film 26 covering the mark 25 and the side of the counter substrate 12 are covered with the protective film 45, the thickness of the mark 25 is likely to be particularly thin.
- the gate insulating film 26 can be reliably covered with the resist pattern 55 also at the edge portion. As a result, it is possible to more reliably prevent the mark 25 from being lost while arranging the mark 25 in the seal region 20 to reduce the non-display region 16.
- the semiconductor layer 52 is provided between the gate insulating film 26 and the protective film 45, the semiconductor layer 52 can more effectively prevent the mark 25 from being lost.
- the TFT substrate 11 and the counter substrate 12 can be aligned with high accuracy and bonded to each other by the mark 25 formed without any defect.
- Embodiment 2 of the Invention >> 45 to 48 show Embodiment 2 of the present invention.
- FIG. 45 is a view corresponding to FIG. 7 showing a cross-sectional structure of the TFT substrate 11 around the mark 25 in the second embodiment.
- FIG. 46 is a view corresponding to FIG. 6 showing a cross-sectional structure of the TFT substrate 11 around the mark 25 in the second embodiment.
- FIG. 47 is a cross-sectional view showing the manufacturing process around the mark 25 on the TFT substrate 11.
- FIG. 48 is a cross-sectional view showing the protective film 45 covered with the resist pattern 55 after etching.
- the semiconductor layer 52 remains on the surface of the gate insulating film 26 covering the mark 25, whereas in the second embodiment, the semiconductor layer 52 is once formed. All have been removed. That is, the protective film 45 in this embodiment is formed directly on the surface of the gate insulating film 26 as shown in FIGS.
- the semiconductor layer 52 is left on the mark 25 and the formation region of the TFT 30 in the third step (second photolithography step) in the first embodiment. To do.
- the semiconductor layer 52 on the mark 25 is used as an etching mask for the gate insulating film 28, the pattern of the semiconductor layer 52 is completely removed by etching.
- the semiconductor layer 52 in the formation region of the TFT 30 is covered with the interlayer insulating film 27 and the passivation film 28, it is not etched.
- the thickness of the film (gate insulating film 26) stacked on the edge portion of the mark 25 is set to the other portion (for example, the formation region of the TFT 30). ) Will be thinner.
- the gate insulating film 26 can be reliably covered with the resist pattern 55 even at the edge portion of the mark 25. While the mark 25 is arranged in the seal area 20 and the non-display area 16 is reduced, it is possible to more reliably prevent the mark 25 from being lost.
- Embodiment 3 of the Invention >> 49 to 52 show Embodiment 3 of the present invention.
- FIG. 49 is an enlarged plan view showing a corner portion of the TFT substrate 11 according to the third embodiment.
- 50 to 52 are enlarged plan views showing the mark 25 in the third embodiment.
- the mark 25 as the alignment mark for alignment of the counter substrate 12 is formed in the seal region 20 of the TFT substrate 11.
- the present invention is not limited to this, and as shown in FIGS. In addition, other marks 25 may be formed.
- the mark 25 shown in FIG. 50 is a mark that serves as a mark of a cutting line when the glass substrate 21 is cut from a large glass substrate base material.
- a mark 25 shown in FIG. 51 is a mark for visually confirming the amount of deviation of the counter substrate 12 with respect to the TFT substrate 11.
- a mark 25 shown in FIG. 52 is a mark for visually confirming the amount of deviation of the dividing line.
- the mark 25 shown in FIG. 51 has a configuration similar to that of the mark 25 in the first embodiment arranged in a total of 8 rows of 2 rows ⁇ 4 columns.
- the gap formed between the outer edge of the mark 23 and the inner edge of the mark 25 in a state in which the mark 23 on the counter substrate 12 and the mark 25 on the TFT substrate 11 are overlapped without deviation is eight sets of marks 23 and 25. Are different from each other.
- the gaps between the marks 23 and 25 of each set are defined in eight sizes from 3 ⁇ m to 10 ⁇ m in 1 ⁇ m increments, for example. Then, regarding the marks 23 and 25 having a gap of 3 ⁇ m, if one side of the outer square of the mark 23 and one side of the square of the inner edge of the mark 25 are in contact, it is determined that the amount of deviation is 3 ⁇ m. If these marks 23 and 25 are used, it is possible to easily detect the amount of deviation. In addition, when detecting the deviation
- a liquid crystal display device has been described as an example of a display device.
- the present invention is not limited to this, and for example, a microcapsule electrophoresis display device used in an electronic book or the like, an organic EL display device, or the like. The same applies to other display devices.
- an organic insulating film (interlayer insulating film) is formed under a pixel electrode provided on a TFT substrate in order to reduce the influence of an electric field generated by a bus line on the TFT substrate electrode. ) Is formed. Therefore, when the present invention is applied to the display device, it is possible to prevent a mark provided in the non-display area from being lost while reducing the non-display area.
- the transparent conductive film has been described as an example of the material layer.
- the present invention is not limited to this, and other layers made of materials other than the transparent conductive film can be applied as the material layer. is there.
- the present invention is useful for an active matrix substrate, a manufacturing method thereof, and a display device.
- Liquid crystal display device 11 TFT substrate (first substrate) 12 Counter substrate (second substrate) 14 Sealing member 15 display area 16 Non-display area 20 Sealing area 21 Glass substrate (insulating substrate) 24 Gate electrode (electrode layer) 25 mark 26 Gate insulation film (first insulation film) 27 Interlayer insulation film (second insulation film) 40 pixel electrodes 45 Protective film 52 Semiconductor layer 53 Transparent conductive material layer (material layer) 55 resist pattern
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Abstract
Description
図1~図44は、本発明の実施形態1を示している。
次に、上記TFT基板11及び液晶表示装置1の製造方法について説明する。液晶表示装置1は、それぞれ予め製造したTFT基板11と対向基板12とを液晶層13及びシール部材14を介して貼り合わせることによって製造する。
したがって、この実施形態1によると、マーク25を覆っているゲート絶縁膜26が例えばピンホールやクラック等を有していたとしても、透明導電材料層53のエッチングの際に、ゲート絶縁膜26が保護膜45及びレジストパターン55によって覆われることにより、エッチャントがゲート絶縁膜26を透過してマーク25を欠損させることを防止できる。
図45~図48は、本発明の実施形態2を示している。
図49~図52は、本発明の実施形態3を示している。
上記各実施形態では、表示装置の例として液晶表示装置について説明したが、本発明はこれに限らず、例えば電子ブック等に用いられるマイクロカプセル型電気泳動方式の表示装置や、有機EL表示装置等の他の表示装置についても、同様に適用することができる。
11 TFT基板(第1基板)
12 対向基板(第2基板)
14 シール部材
15 表示領域
16 非表示領域
20 シール領域
21 ガラス基板(絶縁性基板)
24 ゲート電極(電極層)
25 マーク
26 ゲート絶縁膜(第1絶縁膜)
27 層間絶縁膜(第2絶縁膜)
40 画素電極
45 保護膜
52 半導体層
53 透明導電材料層(材料層)
55 レジストパターン
Claims (18)
- シール部材が設けられる枠形状の領域であるシール領域の内側に設けられた表示領域と、該表示領域の外側に形成され、上記シール領域を含む額縁状の非表示領域とを有し、上記シール部材を介して対向基板に接着されることによって表示装置を構成するアクティブマトリクス基板であって、
絶縁性基板と、
上記表示領域における上記絶縁性基板上に形成された電極層と、
上記非表示領域における上記絶縁性基板上に配置されて上記電極層と同じ材料によって形成されたマークと、
上記電極層及びマークをそれぞれ直接に覆う第1絶縁膜と、
上記第1絶縁膜の一部を覆う第2絶縁膜とを備え、
上記第2絶縁膜は、上記シール領域の少なくとも一部において上記絶縁性基板上から除去されており、
上記マークは、上記第2絶縁膜が除去された領域に配置されると共に、上記シール領域の少なくとも一部に重なるように設けられ、
上記絶縁性基板上には、上記マークを覆っている第1絶縁膜の側面及び当該第1絶縁膜の絶縁性基板と反対側の表面を覆う保護膜が形成されている
ことを特徴とするアクティブマトリクス基板。 - 請求項1に記載されたアクティブマトリクス基板において、
上記表示領域における上記第2絶縁膜の表面には、透明導電膜が形成され、
上記保護膜は、上記透明導電膜と同じ材料によって形成されている
ことを特徴とするアクティブマトリクス基板。 - 請求項1又は2に記載されたアクティブマトリクス基板において、
上記第1絶縁膜は無機絶縁膜によって構成され、
上記第2絶縁膜は有機絶縁膜によって構成されている
ことを特徴とするアクティブマトリクス基板。 - 請求項1乃至3の何れか1つに記載されたアクティブマトリクス基板において、
上記マークを覆っている第1絶縁膜と上記保護膜との間には、半導体層が介在されている
ことを特徴とするアクティブマトリクス基板。 - 請求項1乃至3の何れか1つに記載されたアクティブマトリクス基板において、
上記保護膜は、上記マークを覆っている第1絶縁膜を直接に覆っている
ことを特徴とするアクティブマトリクス基板。 - 請求項1乃至5の何れか1つに記載されたアクティブマトリクス基板において、
上記マークは、当該アクティブマトリクス基板と上記対向基板との位置合わせに用いるアライメントマークである
ことを特徴とするアクティブマトリクス基板。 - 第1基板と、
上記第1基板に対向して配置された第2基板と、
上記第1基板及び第2基板の間に介在され、該第1基板及び第2基板同士を互いに接着する枠形状のシール部材と、
上記シール部材が設けられる枠形状の領域であるシール領域の内側に設けられた表示領域と、
上記表示領域の外側に形成され、上記シール領域を含む額縁状の非表示領域とを備えた表示装置であって、
上記第1基板は、絶縁性基板と、上記表示領域における上記絶縁性基板上に形成された電極層と、上記非表示領域における上記絶縁性基板上に配置されて上記電極層と同じ材料によって形成されたマークと、上記電極層及びマークをそれぞれ直接に覆う第1絶縁膜と、該第1絶縁膜の一部を覆う第2絶縁膜とを有し、
上記第2絶縁膜は、上記シール領域の少なくとも一部において上記絶縁性基板上から除去されており、
上記マークは、上記第2絶縁膜が除去された領域に配置されると共に、上記シール領域の少なくとも一部に重なるように設けられ、
上記絶縁性基板上には、上記マークを覆っている第1絶縁膜の側面及び当該第1絶縁膜の絶縁性基板と反対側の表面を覆う保護膜が形成されている
ことを特徴とする表示装置。 - 請求項7に記載された表示装置において、
上記表示領域における上記第2絶縁膜の表面には、透明導電膜が形成され、
上記保護膜は、上記透明導電膜と同じ材料によって形成されている
ことを特徴とする表示装置。 - 請求項7又は8に記載された表示装置において、
上記第1絶縁膜は無機絶縁膜によって構成され、
上記第2絶縁膜は有機絶縁膜によって構成されている
ことを特徴とする表示装置。 - 請求項7乃至9の何れか1つに記載された表示装置において、
上記マークを覆っている第1絶縁膜と上記保護膜との間には、半導体層が介在されている
ことを特徴とする表示装置。 - 請求項7乃至9の何れか1つに記載された表示装置において、
上記保護膜は、上記マークを覆っている第1絶縁膜を直接に覆っている
ことを特徴とする表示装置。 - 請求項7乃至11の何れか1つに記載された表示装置において、
上記マークは、上記第1基板と上記第2基板との位置合わせに用いるアライメントマークである
ことを特徴とする表示装置。 - シール部材が設けられる枠形状の領域であるシール領域の内側に設けられた表示領域と、該表示領域の外側に形成され、上記シール領域を含む額縁状の非表示領域とを有し、上記シール部材を介して対向基板に接着されることによって表示装置を構成するアクティブマトリクス基板を製造する方法であって、
絶縁性基板上の上記表示領域に電極層を形成すると共に、上記絶縁性基板上の上記非表示領域に上記電極層と同じ材料からなるマークを上記シール領域に重なるように形成する工程と、
上記絶縁性基板上に上記電極層及びマークをそれぞれ直接に覆う第1絶縁膜を形成する工程と、
上記第1絶縁膜の一部を覆うと共に、上記シール領域の少なくとも一部及び上記マークが形成されている領域から除去された第2絶縁膜を形成する工程と、
上記絶縁性基板上に上記第1絶縁膜及び第2絶縁膜を覆う材料層を形成した後に、上記材料層の表面にレジストパターンを形成し、当該レジストパターンから露出している上記材料層をエッチングすることにより、上記マークを覆っている第1絶縁膜の側面及び当該第1絶縁膜の絶縁性基板と反対側の表面を覆う保護膜を形成する工程とを有する
ことを特徴とするアクティブマトリクス基板の製造方法。 - 請求項13に記載されたアクティブマトリクス基板の製造方法において、
上記保護膜を形成する工程では、上記材料層としての透明導電材料層をエッチングすることによって、上記表示領域における上記第2絶縁膜の表面に透明導電膜を形成すると共に、該透明導電膜と同じ材料により上記保護膜を形成する
ことを特徴とするアクティブマトリクス基板の製造方法。 - 請求項13又は14に記載されたアクティブマトリクス基板の製造方法において、
上記第1絶縁膜は無機絶縁膜によって構成され、
上記第2絶縁膜は有機絶縁膜によって構成されている
ことを特徴とするアクティブマトリクス基板の製造方法。 - 請求項13乃至15の何れか1つに記載されたアクティブマトリクス基板の製造方法において、
上記第1絶縁膜を形成する工程の後に、上記マークを覆うように上記第1絶縁膜の表面に半導体層を形成する工程を有し、
上記保護膜を形成する工程では、上記半導体層を覆うように上記保護膜を形成する
ことを特徴とするアクティブマトリクス基板の製造方法。 - 請求項13乃至15の何れか1つに記載されたアクティブマトリクス基板の製造方法において、
上記保護膜を形成する工程では、上記マークを覆っている上記第1絶縁膜の表面に直接に上記保護膜を形成する
ことを特徴とするアクティブマトリクス基板の製造方法。 - 請求項13乃至17の何れか1つに記載されたアクティブマトリクス基板の製造方法において、
上記マークは、当該アクティブマトリクス基板と上記対向基板との位置合わせに用いるアライメントマークである
ことを特徴とするアクティブマトリクス基板の製造方法。
Priority Applications (3)
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JP2012531683A JP5450825B2 (ja) | 2010-09-03 | 2011-08-29 | アクティブマトリクス基板及びその製造方法並びに表示装置 |
US13/819,871 US9070812B2 (en) | 2010-09-03 | 2011-08-29 | Active matrix substrate, method for fabricating the same, and display device |
CN201180042417.9A CN103098115B (zh) | 2010-09-03 | 2011-08-29 | 有源矩阵基板及其制造方法以及显示装置 |
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JP2010-197881 | 2010-09-03 | ||
JP2010197881 | 2010-09-03 |
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WO2012029281A1 true WO2012029281A1 (ja) | 2012-03-08 |
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PCT/JP2011/004797 WO2012029281A1 (ja) | 2010-09-03 | 2011-08-29 | アクティブマトリクス基板及びその製造方法並びに表示装置 |
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US (1) | US9070812B2 (ja) |
JP (1) | JP5450825B2 (ja) |
CN (1) | CN103098115B (ja) |
WO (1) | WO2012029281A1 (ja) |
Cited By (2)
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WO2013190815A1 (ja) * | 2012-06-22 | 2013-12-27 | シャープ株式会社 | アクティブマトリクス基板の製造方法及び表示装置の製造方法 |
KR20150076750A (ko) * | 2013-12-27 | 2015-07-07 | 엘지디스플레이 주식회사 | 리페어 구조를 갖는 표시장치 및 표시패널 |
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CN103474438A (zh) * | 2013-09-26 | 2013-12-25 | 深圳市华星光电技术有限公司 | 薄膜晶体管阵列基板及液晶面板 |
KR20170038964A (ko) * | 2015-09-30 | 2017-04-10 | 삼성디스플레이 주식회사 | 표시 패널 및 그의 제조 방법 |
CN109727920B (zh) * | 2018-12-18 | 2020-10-30 | 武汉华星光电半导体显示技术有限公司 | Tft基板的制作方法及tft基板 |
TWI699580B (zh) * | 2019-03-07 | 2020-07-21 | 友達光電股份有限公司 | 陣列基板 |
US12082449B2 (en) * | 2019-03-29 | 2024-09-03 | Sharp Kabushiki Kaisha | Display device |
CN115167039A (zh) * | 2022-07-11 | 2022-10-11 | 广州华星光电半导体显示技术有限公司 | 阵列基板及液晶显示面板 |
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- 2011-08-29 JP JP2012531683A patent/JP5450825B2/ja not_active Expired - Fee Related
- 2011-08-29 CN CN201180042417.9A patent/CN103098115B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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US9070812B2 (en) | 2015-06-30 |
JPWO2012029281A1 (ja) | 2013-10-28 |
US20130153912A1 (en) | 2013-06-20 |
CN103098115B (zh) | 2015-03-25 |
CN103098115A (zh) | 2013-05-08 |
JP5450825B2 (ja) | 2014-03-26 |
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