JP2010217649A - Display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device wherein the separation of a portion formed on the surface of a stepped part of an insulation film of a reflection layer from the insulation film is suppressed. <P>SOLUTION: An EL device (display device) 101 includes: a plurality of pixels 2; a common feeder 11 supplying a signal or power to each of the plurality of pixels 2; an organic planarizing film 22 covering the common feeder 11; and a reflection layer 23 covering the organic planarizing film 22 and having a side face section 23a one-dimensionally crossing the common feeder 11. The cross-sectional shape of the feeder 11 is a trapezoidal shape having a base 11b and side face parts 11a, which is inclined inside toward the upper part. The angle A1, formed by the side face part 11a of the cross-sectional shape along the side face part 23a of the reflecting layer 23 of the common feeder 11 and the base 11b, is smaller than the angle A2 formed by the side-face part 211a of a cross-sectional shape, in the width direction of a common feeder 211 and the base 211b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device and an electronic device, and more particularly to a display device and an electronic device in which a reflective layer is formed above a wiring via an insulating film.

  2. Description of the Related Art Conventionally, a display device in which a reflective layer is formed above an interconnect via an insulating film is known (for example, see Patent Document 1). In the display device disclosed in Patent Document 1, wirings such as signal lines and power lines for supplying signals and power are formed in a plurality of pixels provided in a display region on a substrate. An insulating film is formed above the wiring. A reflective layer for reflecting light is formed for each pixel above the insulating film. The plurality of pixels are arranged in a matrix, and the wiring and the reflective layer are arranged so as to intersect (orthogonally) at about 90 degrees when viewed in a plan view. A light emitting body (light emitting layer) made of an organic EL layer is formed above the reflective layer.

JP 2007-121537 A

  However, in the display device described in Patent Document 1, for example, a stepped portion reflecting the shape of the side surface of the wiring may be formed on the surface of the insulating film formed above the wiring. In this case, when the reflective layer is formed on the step portion of the insulating film reflecting the shape of the side surface portion of the wiring, the portion formed on the surface of the step portion of the insulating film of the reflective layer is the insulating film of the reflective layer. Compared with the portion formed on the surface of the flat portion, the adhesive force with the insulating film is reduced. For this reason, there exists a problem that the part formed on the surface of the level | step-difference part of an insulating film among reflective layers tends to peel from an insulating film.

  The present invention has been made to solve the above-described problems, and one object of the present invention is that a portion of the reflective layer formed on the surface of the step portion of the insulating film is peeled off from the insulating film. It is an object of the present invention to provide a display device and an electronic apparatus that can suppress the occurrence.

Means for Solving the Problems and Effects of the Invention

  To achieve the above object, a display device according to a first aspect of the present invention includes a plurality of pixels, a wiring for supplying a signal or power to each of the plurality of pixels, an insulating film covering the wiring, and an insulating film. And a reflection layer having a side surface portion that intersects the wiring in a planar manner, and the cross-sectional shape of the wiring is a trapezoidal shape having a bottom side portion and a side surface portion inclined inward toward the upper side, and reflection of the wiring The angle formed between the side surface portion of the cross-sectional shape along the side surface portion of the layer and the bottom side portion is smaller than the angle formed between the side surface portion of the cross-sectional shape in the width direction of the wiring and the bottom side portion.

  In the display device according to the first aspect of the present invention, as described above, the cross-sectional shape of the wiring is a trapezoidal shape having a bottom part and a side part inclined inward toward the upper side, and the side surface of the reflective layer of the wiring By making the angle formed between the side surface portion and the bottom side portion of the cross-sectional shape along the section smaller than the angle formed between the side surface portion and the bottom side portion of the cross-sectional shape in the width direction of the wiring, for example, the side surface portion of the insulating film wiring When the stepped portion is formed in the portion corresponding to, the angle between the side surface portion and the bottom portion of the cross-sectional shape along the side surface portion of the reflective layer of the wiring is reduced, so that the angle of the stepped portion of the insulating film is reduced. Since it can be made small, it can suppress that the part formed on the surface of the level | step-difference part of an insulating film among reflective layers peels from an insulating film.

  In the display device according to the first aspect, preferably, the insulating film includes a step portion in a portion corresponding to the side surface portion of the wiring, and the reflective layer is formed so as to cover the step portion of the insulating film. The part and the side part of the reflective layer are arranged so as not to be orthogonal to each other when seen in a plan view. If comprised in this way, compared with the case where the side part of a wiring and the side part of a reflection layer are arrange | positioned so that it may cross | intersect (perpendicular) at an angle of 90 degree seeing planarly, Since the length of the intersecting portion of the reflecting layer and the side surface portion of the reflective layer is increased, the inclination angle of the stepped portion of the insulating film at the intersecting portion is decreased by the length of the intersecting portion. As a result, the inclination angle of the side surface portion of the reflective layer formed on the surface of the wiring of the intersecting portion is reduced, so that the portion of the reflective layer formed on the surface of the step portion of the insulating film is peeled off from the insulating film. Can be suppressed.

  In this case, preferably, the pixel has a rectangular shape, and the side surface portion of the reflective layer is formed along the rectangular shape of the pixel when viewed in plan, and the side surface portion of the wiring is viewed in plan. Thus, they are arranged so as not to be orthogonal to the side surface portion of the reflective layer extending along the rectangular shape of the pixel. If comprised in this way, without changing the shape of the side part of the reflective layer extended along the rectangular shape of a pixel, the side part of a reflective layer and the side part of a wiring can be easily made at an angle smaller than 90 degrees. Can be configured to intersect.

  In the display device according to the first aspect, preferably, the wiring includes at least one of a power supply line and a signal line. According to this configuration, the length of the intersecting portion between the side surface portion of at least one of the power supply line and the signal line and the side surface portion of the reflective layer is increased, so the length of the intersecting portion is increased. Accordingly, the inclination angle of the step portion of the insulating film at the intersecting portion is reduced. As a result, the inclination angle of the side surface portion of the reflective layer formed on the surface of at least one of the intersecting power supply lines and signal lines is reduced, so that the insulation corresponding to at least one of the power supply lines and signal lines The reflection layer formed on the surface of the step portion of the film can be prevented from peeling from the insulating film.

  In this case, preferably, the wiring includes a signal line and a band-shaped power supply line arranged so as to extend in a direction substantially orthogonal to the signal line when seen in a plan view. And the side surface portion of the reflective layer are arranged so as not to be orthogonal to each other when seen in a plan view. With this configuration, the length of the intersecting portion between the side surface portion of the belt-shaped power supply line and the side surface portion of the reflective layer is increased. The inclination angle of the step portion of the insulating film is reduced. Thereby, the inclination angle of the side surface portion of the reflective layer formed on the surface of the belt-shaped power supply line at the intersecting portion is reduced. As a result, when the reflective layer is formed on the surface of the step portion of the insulating film corresponding to the strip-shaped power supply line extending in a direction substantially orthogonal to the signal line, the reflective layer is prevented from peeling from the insulating film. Can do.

  In the display device in which the wiring includes at least one of a power supply line and a signal line, the wiring is preferably formed to extend linearly in the direction along the signal line and the direction in which the signal line extends. Both side portions of the power supply line that intersect with the side portion of the reflective layer of the linear power line are not orthogonal to the side surface portion of the reflective layer and are arranged in parallel with each other in plan view Has been. If comprised in this way, since the length of the part which the side part of a linear power supply line and the side part of a reflective layer cross | intersect will become large, the side part of a linear power supply line, the side part of a reflective layer, Since the length of the intersecting portion is larger than the case of intersecting (orthogonal) at 90 degrees, the inclination angle of the step portion of the insulating film at the intersecting portion is reduced. Accordingly, when the reflective layer is formed on the surface of the step portion of the insulating film corresponding to the linear power supply line extending along the signal line extending direction, the reflective layer is prevented from peeling from the insulating film. be able to.

  In the display device in which the wiring includes at least one of a power supply line and a signal line, the wiring preferably includes a signal line, and the signal line protrudes in a direction intersecting with the extending direction of the signal line. Is formed, and the side surface portion of the protruding portion of the signal line and the side surface portion of the reflective layer are arranged so as not to be orthogonal to each other when seen in a plan view. With this configuration, the length of the portion where the side surface portion of the protruding portion of the signal line and the side surface portion of the reflective layer intersect with each other increases, so that the side surface portion of the protruding portion of the signal line and the side surface portion of the reflective layer Since the length of the intersecting portion is larger than the case of intersecting (orthogonal) at 90 degrees, the inclination angle of the step portion of the insulating film at the intersecting portion is reduced. Thereby, it can suppress that the reflective layer formed on the surface of the level | step-difference part of the insulating film corresponding to the protrusion part of a signal line peels from an insulating film.

  In the display device in which the wiring includes at least one of a power supply line and a signal line, the wiring preferably includes both the power supply line and the signal line, and the power supply line and the signal line are formed of the same layer. If comprised in this way, the power supply line and signal line which cross | intersect a reflection layer at an angle smaller than 90 degree | times can be formed by the same process.

  In the display device according to the first aspect described above, preferably, one side surface portion of the wiring and the side surface portion of the reflective layer are arranged so as to intersect each other in an angle range of 5 degrees or more and 60 degrees or less when seen in a plan view. ing. If comprised in this way, it can suppress more effectively that a reflection layer peels from an insulating film.

  In the display device according to the first aspect, the insulating film is preferably made of an organic planarizing film. If comprised in this way, since the insulating film which consists of an organic planarization film does not reflect the shape under an insulating film easily, the height of the level | step-difference part formed in the surface of an insulating film can be made small. Thereby, since the inclination angle of the stepped portion can be reduced, it is possible to further suppress peeling of the reflective layer formed on the surface of the stepped portion of the insulating film.

  An electronic apparatus according to a second aspect of the present invention includes a display device having any one of the configurations described above. If comprised in this way, the electronic device provided with the display apparatus which can suppress that the part formed on the surface of the level | step-difference part of an insulating film among reflective layers can suppress peeling from an insulating film can be obtained. .

It is a conceptual diagram for demonstrating the schematic structure of the display apparatus of this invention. It is a conceptual diagram for demonstrating the schematic structure of the display apparatus by a comparative example. 1 is a plan view of an EL device according to a first embodiment of the present invention. FIG. 9 is a cross-sectional view taken along line 500-500 in FIG. 1 is a plan view of a pixel of an EL device according to a first embodiment of the present invention. 1 is a plan view of a pixel of an EL device according to a first embodiment of the present invention. 1 is a plan view of a pixel of an EL device according to a first embodiment of the present invention. 1 is a plan view of a pixel of an EL device according to a first embodiment of the present invention. FIG. 9 is an enlarged plan view of a pixel of the EL device according to the first embodiment shown in FIG. 8. It is sectional drawing along the 600-600 line of FIG. It is a top view of the pixel for demonstrating the EL apparatus by a comparative example. FIG. 12 is a cross-sectional view taken along line 700-700 in FIG. It is a top view of the pixel of the EL device by a 2nd embodiment of the present invention. It is a top view of the pixel of the EL device by a 2nd embodiment of the present invention. FIG. 15 is an enlarged plan view of a pixel of the EL device according to the second embodiment shown in FIG. 14. It is a top view of the pixel for demonstrating the EL apparatus by a comparative example. It is a figure for demonstrating the 1st example of the electronic device using the EL apparatus by 1st and 2nd embodiment of this invention. It is a figure for demonstrating the 2nd example of the electronic device using the EL apparatus by 1st and 2nd embodiment of this invention. It is a figure for demonstrating the 3rd example of the electronic device using the EL apparatus by 1st and 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Before describing a specific embodiment of the present invention, a schematic structure of an EL (electroluminescence) device 100 of the present invention will be described with reference to FIG. The EL device 100 is an example of the “display device” in the present invention. 1A and 1B are a plan view and a cross-sectional view, respectively, of the schematic structure of the present invention.

  In the EL device 100 of the present invention, TFT wiring 111 is formed on the surface of the substrate 110 as shown in FIG. The TFT wiring 111 is an example of the “wiring” in the present invention. The cross-sectional shape of the TFT wiring 111 is a trapezoidal shape having a bottom side portion 111b and a side surface portion 111a inclined inwardly upward. The reflective layer 113 formed above the TFT wiring 111 has a side surface 113 a that intersects with the TFT wiring 111. The angle α1 formed between the side surface portion 111a of the cross-sectional shape of the TFT wiring 111 along the side surface portion 113a of the reflective layer 113 and the bottom side portion 111b is equal to the side surface portion 121a of the cross-sectional shape in the width direction of the TFT wiring 121 shown in FIG. It is formed smaller than the angle β1 formed with the base 121b. In addition, the TFT wiring 111 has a side surface portion 111 a inclined at an angle α1 of less than 90 degrees inwardly with respect to the surface of the substrate 110 in the cross section of the portion intersecting with the reflective layer 113.

  In addition, an organic planarization film 112 is formed so as to cover the substrate 110 and the TFT wiring 111. The organic planarization film 112 is an example of the “insulating film” in the present invention. The purpose of forming the organic planarizing film 112 is to flatten the surface. However, depending on the film thickness of the organic planarization film 112, the shape of the lower layer formation, and the like, it is difficult to completely planarize the surface, so that the portion corresponding to the side surface portion 111a of the TFT wiring 111 of the organic planarization film 112 is not provided. The step portion 112 a reflecting the outer shape of the TFT wiring 111 is formed. The step 112a is formed so as to be inclined with respect to the surface of the substrate 110 at an angle α2 smaller than the angle α1 of the side surface 111a of the TFT wiring 111. A reflective layer 113 is formed on the surface of the organic planarizing film 112.

  Here, in the EL device 100 of the present invention, the side surface portion 111a of the TFT wiring 111 and the side surface portion 113a of the reflective layer 113 are arranged so as to intersect at an angle α3 smaller than 90 degrees when viewed in plan. ing. Moreover, the length of the part which cross | intersects the side part 113a of the reflection layer 113 of the side part 111a of TFT wiring 111 seeing planarly is L1. Further, the height of the side surface portion 113a corresponding to the side surface portion 111a of the TFT wiring 111 of the reflective layer 113 is H1.

  Next, in the EL device 100 a according to the comparative example of the present invention, as shown in FIG. 2, the direction along the side surface portion 123 a of the reflective layer 123 coincides with the width direction of the TFT wiring 121, and the side surface portion of the reflective layer 123. The cross-sectional shape of the TFT wiring 121 along 123a has a steep trapezoidal shape. Further, when viewed in a plan view, the side surface portion 121a of the TFT wiring 121 formed on the surface of the substrate 120 and the side surface portion 123a of the reflective layer 123 are arranged so as to intersect at an angle β2 of 90 degrees (right angle). Has been. Further, the height of the side surface portion 123a corresponding to the side surface portion 121a of the TFT wiring 121 of the reflective layer 123 is H2 (= H1). In addition, the length of the portion where the side surface portion 121a of the TFT wiring 121 and the side surface portion 123a of the reflective layer 123 intersect with each other in a plan view is L2 (<L1).

  In the configuration of the EL device 100a according to the comparative example, in the cross section of the portion where the TFT wiring 121 and the reflective layer 123 intersect (orthogonal), the TFT wiring 121 is inside at an angle β1 larger than the angle α1 of the TFT wiring 111 in FIG. It is inclined to. Further, in the cross section of the portion where the TFT wiring 121 and the reflective layer 123 intersect (orthogonal), the stepped portion 122a corresponding to the side surface portion 121a of the TFT wiring 121 of the organic planarization film 122 is the organic planarization shown in FIG. The film 112 is inclined at an angle β3 larger than the angle α2 of the stepped portion 112a.

  1 is different from the EL device 100a of the comparative example shown in FIG. 2 in that the cross-sectional shape of the TFT wiring 111 along the end of the reflective layer 113 is the TFT wiring. 111 has a trapezoidal shape that is slower than the cross-sectional shape in the width direction. Further, the angle (inclination) α2 of the stepped portion 112a of the organic planarizing film 112 is set such that the angle (sandwich angle) between the side surface portion 111a of the TFT wiring 111 and the side surface portion 113a of the reflective layer 113 is an angle α3 smaller than 90 degrees. Since it becomes small, it is possible to suppress the adhesion force of the reflective layer 113 formed on the surface of the stepped portion 112a of the organic planarizing film 112 to the organic planarizing film 112 from becoming small. Thereby, it is possible to prevent the reflective layer 113 formed on the surface of the stepped portion 112 a of the organic planarizing film 112 from peeling from the organic planarizing film 112.

  Hereinafter, an embodiment in which the structure of the present invention shown in FIG. 1 is embodied will be described.

(First embodiment)
The configuration of the EL device 101 according to the first embodiment of the present invention will be described with reference to FIG. The EL device 101 is an example of the “display device” in the present invention. In the first embodiment of the present invention, a case where the present invention is applied to a top emission type EL (electroluminescence) device 101 as an example of a display device will be described.

  In the EL device 101 according to the first embodiment of the present invention, as shown in FIG. 3, on the surface of the substrate 1, a display area 1a in which a plurality of pixels 2 having a rectangular shape are arranged in a matrix, and a display area The non-display area | region 1b arrange | positioned so that 1a may be enclosed is provided. In the non-display area 1b, two scanning line driving circuits 3 and one data line driving circuit 4 are provided. A plurality of gate lines 5 are connected to the scanning line driving circuit 3, and a plurality of signal lines 6 are connected to the data line driving circuit 4. The signal line 6 is an example of the “wiring” in the present invention. The plurality of pixels 2 arranged in the display area 1a are arranged at positions where the gate lines 5 and the signal lines 6 intersect.

  The pixel 2 includes a pixel selection TFT (Thin Film Transistor) 7, a drive current control TFT 8, a storage capacitor 9, and an organic EL (electroluminescence) element 10. The gate of the TFT 7 is connected to the gate line 5. One of the source / drain electrodes of the TFT 7 is connected to the signal line 6 and the other is connected to the gate of the TFT 8. One of the source / drain electrodes of the TFT 8 is connected to the organic EL element 10 and the other is connected to the common power supply line 11. The common power supply line 11 is an example of the “wiring” and “power supply line” in the present invention. A storage capacitor 9 is provided between the other of the source / drain electrodes of the TFT 7 and the gate of the TFT 8 and the common power supply line 11. Here, in the first embodiment, as shown in FIG. 10, the cross section of the portion where the common power supply line 11 and a reflection layer 23 described later cross the side surface portion 23 a of the reflection layer 23 of the common power supply line 11. An angle A1 formed between the side surface portion 11a and the bottom side portion 11b having a cross-sectional shape is an angle formed between the side surface portion 211a and the bottom side portion 211b having a cross-sectional shape in the width direction of the common power supply line 211 of the EL device 101a of the comparative example illustrated in FIG. Less than A2.

  Next, the detailed configuration of the pixel 2 according to the first embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 4, in the EL device 101, a buffer film 12 is formed on the surface of the substrate 1, and a buffer film 13 is formed on the surface of the buffer film 12. The buffer film 12 is made of a silicon nitride film (SiN film). The buffer film 13 is made of a silicon oxide film (SiO ₂ film). An active layer 141 and an active layer 142 made of polysilicon or the like are formed in regions where the pixel selection TFT 7 and the drive current control TFT 8 are formed on the surface of the buffer film 13, respectively. .

  Further, as shown in FIG. 5, in the storage capacitor 9, a gate layer 92 is formed on an active layer 91 formed of the same layer as the active layer 141 (142) via an insulating film 15 (see FIG. 4). It is constituted by.

  Also, as shown in FIG. 4, an insulating film 15 is formed on the surface of the buffer film 13 so as to cover the active layer 141 (142). Note that a portion of the insulating film 15 located on the active layer 141 (142) functions as a gate insulating film. The insulating film 15 is made of a silicon oxide film or a silicon nitride film. A gate electrode 51 (gate line 5) is formed on the surface of the insulating film 15 functioning as a gate insulating film of the TFT 7. The gate electrode 51 is made of chromium, molybdenum, or the like. A gate electrode 52 is formed on the surface of the insulating film 15 functioning as a gate insulating film of the TFT 8. An interlayer insulating film 16 made of a silicon oxide film or the like is formed on the surfaces of the insulating film 15, the gate electrode 51, and the gate electrode 52.

  The insulating film 15 has a contact hole 151a (152a) for exposing the source region 141a (142a) of the active layer 141 (142) and a contact hole 151b (152b) for exposing the drain region 141b (142b). Is formed. The interlayer insulating film 16 has a contact hole 161a (162a) for exposing the source region 141a (142a) of the active layer 141 (142) and a contact hole 161b for exposing the drain region 141b (142b). (162b) is formed.

  A source electrode 17 (18) is formed in the contact hole 161a (162a) so as to be connected to the source region 141a (142a) of the active layer 141 (142). A drain electrode 19 (20) is formed in the contact hole 161b (162b) so as to be connected to the drain region 141b (142b) of the active layer 141 (142).

  Further, as shown in FIG. 6, the active layer 91 of the storage capacitor 9, the source electrode 17 (source region 141 a) of the TFT 7, and the gate electrode 52 of the TFT 8 are electrically connected by a wiring 93. The signal line 6 is formed to extend in the Y direction. Here, in the first embodiment, as shown in FIG. 7, the common power supply line 11 is formed in a band shape having a large width in the Y direction so as to extend in a direction substantially orthogonal to the signal line 6 (X direction). ing. Further, the gate layer 92 of the storage capacitor 9, the drain electrode 20 (drain region 142 b) of the TFT 8, and the common power supply line 11 are electrically connected. Further, the signal line 6 and the drain electrode 19 of the TFT 7 are electrically connected by a connecting portion 61.

  Further, as shown in FIG. 4, the surface of the source electrode 17 (18), the drain electrode 19 (20), the common feed line 11, and the interlayer insulating film 16 is made of a silicon nitride film and has a thickness of about 100 nm or more. A passivation film 21 having a thickness of 500 nm or less is formed. On the surface of the passivation film 21, an insulating organic planarizing film 22 made of a photosensitive acrylic resin is formed. The organic planarization film 22 is an example of the “insulating film” in the present invention.

  Further, in the first embodiment, the surface of the organic planarizing film 22 is not formed completely flat, but as shown in FIG. 10, the stepped portion 22b reflecting the outer shape of the side surface portion 11a of the common power supply line 11. Is formed. Further, in the cross section of the portion where the common power supply line 11 and the reflective layer 23 intersect, the step portion 22b corresponding to the side surface part 11a of the common power supply line 11 of the organic planarization film 22 is the EL device of the comparative example shown in FIG. The organic flattening film 222 of 101a is inclined at an angle A4 that is smaller than the angle A3 of the step 222b.

  Further, as shown in FIG. 4, a contact hole 21a and a contact hole 22a are formed in the passivation film 21 and the organic planarizing film 22, respectively. The contact holes 21a and 22a are formed to expose the surface of the source electrode 18 of the TFT 8.

  On the surface of the organic planarizing film 22, a reflective layer 23 made of an aluminum alloy film such as AlNd (aluminum neodymium) or a metal film such as Cr (chromium) is formed. As shown in FIG. 8, the reflective layer 23 is disposed so as to overlap with the region of the pixel 2 other than the region where the source electrode 18 of the TFT 8 is formed in plan view. Further, the side surface portion 23 a of the reflective layer 23 is formed so as to extend along the rectangular shape of the pixel 2 when seen in a plan view.

  In the first embodiment, as shown in FIG. 9, the side surface portion 11 a of the strip-shaped common power supply line 11 having a large width in the Y direction and the side surface portion of the reflective layer 23 formed along the rectangular shape of the pixel 2. 23a is arranged so as to intersect at an angle A5 smaller than 90 degrees when viewed in a plan view. In this case, preferably, the side surface portion 11a of the strip-shaped common power supply line 11 and the side surface portion 23a of the reflective layer 23 formed along the rectangular shape of the pixel 2 are 5 degrees or more and 60 degrees when viewed in plan. It is good to arrange so that it may cross in the following angle ranges.

  Further, the width (length) W1 (see FIG. 8) in the Y direction of the portion of the belt-shaped common power supply line 11 that intersects the side surface portion 23a of the reflective layer 23 is, as viewed in plan, the band-shaped common power supply line 11. It is formed to be smaller than the width (length) W2 in the Y direction in the vicinity of the central portion of the portion overlapping with the reflective layer 23. Thereby, the side surface part 11a of the strip-shaped common feeder 11 and the side surface part 23a of the reflective layer 23 are arranged so as to intersect at an angle smaller than 90 degrees when viewed in a plan view.

  Further, a protruding portion 6 a is formed at a portion of the connecting portion 61 connected to the drain electrode 19 of the TFT 7. The protrusion 6a is formed in a trapezoidal shape when seen in a plan view. Moreover, in 1st Embodiment, as shown in FIG. 9, the side part 6b of the protrusion part 6a and the side part 23a of the reflection layer 23 cross | intersect by angle A6 smaller than 90 degree | times seeing planarly. Are arranged as follows.

  Also, as shown in FIG. 10, the height of the side surface portion 23a corresponding to the side surface portion 11a of the common feeder line 11 of the reflective layer 23 is H3. In addition, the length of the portion where the side surface portion 11a of the common power supply line 11 and the side surface portion 23a of the reflective layer 23 intersect is L3.

  Further, as shown in FIG. 4, a low-temperature passivation film 24 made of an inorganic insulating film such as a silicon nitride film (SiN film) and having a thickness of about 10 nm to about 100 nm is formed on the surface and side surfaces of the reflective layer 23. Is formed. Further, a portion of the low-temperature passivation film 24 corresponding to the boundary portion between adjacent pixels 2 is formed with a moisture removal opening 24a for removing moisture contained in the organic planarization film 22 or the like. Has been.

  On the surface of the source electrode 18 of the TFT 8 and the low-temperature passivation film 24, a pixel electrode 25 made of a transparent electrode such as ITO (indium tin oxide) is formed for each pixel 2. The pixel electrode 25 is electrically connected to the source electrode 18 of the TFT 8 provided in each pixel 2, and is configured to be applied with a voltage corresponding to the display signal.

  Further, in the region between the adjacent pixels 2, a partition wall is provided so as to cover the moisture removal opening 24 a of the low-temperature passivation film 24 and the surface of the pixel electrode 25 formed in the vicinity of the moisture removal opening 24 a. 27 is formed.

  An organic light emitting layer 26 is formed on the partition wall 27 and the pixel electrode 25. The organic light emitting layer 26 is an example of the “light emitting layer” in the present invention. Further, on the organic light emitting layer 26, a counter electrode 28 made of a metal such as magnesium and silver and capable of semi-reflection is formed. A sealing film 29 is formed on the counter electrode 28. The substrate 1 formed up to the sealing film 29 is bonded to the sealing substrate 31 through the adhesive layer 30.

  With the configuration as described above, the light emitted from the organic light emitting layer 26 can be resonated between the reflective layer 23 and the counter electrode 28, and light can be emitted from the counter electrode 28 side with increased light intensity. Can be emitted.

  In the above configuration, when the pixel electrode 25 is an anode and the counter electrode 28 is a cathode, a positive power source is connected to the common power supply line 11 (see FIG. 3) and a negative power source is connected to the counter electrode 28. In the pixel 2 selected by the TFT 7, the drive current from the common power supply line 11 is controlled by the TFT 8 according to the signal from the signal line 6 and applied to the pixel electrode 25. As a result, light is emitted from the organic light emitting layer 26.

  In the first embodiment, as described above, the angle A1 formed by the side surface portion 11a having the cross-sectional shape along the side surface portion 23a of the reflective layer 23 of the common power supply line 11 and the bottom side portion 11b is set in the width direction of the common power supply line 211. The angle A2 is smaller than the angle A2 formed between the side surface portion 211a and the bottom side portion 211b of the cross-sectional shape. Thus, as in the EL device 101a of the comparative example shown in FIG. 11, the side surface portion 211a of the common power supply line 211 and the side surface portion 223a of the reflective layer 223 intersect at an angle of 90 degrees when viewed in a plan view. 12 is compared with the length L4 of the portion where the side surface portion 211a of the common power supply line 211 and the side surface portion 223a of the reflective layer 223 intersect, as shown in FIG. The length L3 of the portion (see FIG. 10) is larger. As a result, the inclination angle A4 of the stepped portion 22b of the organic planarizing film 22 is reduced by the length of the intersecting portion. Thus, the inclination angle A4 of the side surface portion 23a of the reflective layer 23 formed on the surface of the common power supply line 11 is such that the stepped portion 222b of the organic planarization film 222 and the side surface portion of the reflective layer 223 of the EL device 101a according to the comparative example. Since the inclination angle A3 (see FIG. 12) of 223a is smaller, the portion of the reflective layer 23 of the EL device 101 of the present invention formed on the surface of the stepped portion 22b of the organic planarizing film 22 is the organic planarizing film. Peeling from 22 can be suppressed.

  In the first embodiment, as described above, the side surface portion 11a of the common power supply line 11 and the side surface portion 23a of the reflective layer 23 are arranged so as to intersect at a non-orthogonal angle A5 when seen in a plan view. Compared to the case where the side surface portion 11a of the common power supply line 11 and the side surface portion 23a of the reflective layer 23 are arranged so as to intersect (orthogonally) at an angle of 90 degrees when viewed in a plan view. Since the length of the intersecting portion between the side surface portion 11a of the eleventh side surface and the side surface portion 23a of the reflective layer 23 is increased, the stepped portion of the organic planarization film 22 at the intersecting portion is increased by the length of the intersecting portion. The inclination angle A4 of 22b becomes small. As a result, the inclination angle of the side surface portion 23a of the reflective layer 23 formed on the surface of the common feed line 11 at the intersecting portion is reduced, so that the surface of the step portion 22b of the organic planarization film 22 in the reflective layer 23 is reduced. It can suppress that the part formed in this peels from the organic planarization film | membrane 22. FIG.

  In the first embodiment, as described above, the side surface portion 11a of the strip-shaped common feeder 11 and the side surface portion 23a of the reflective layer 23 are arranged so as not to be orthogonal when viewed in a plan view. Since the length L3 of the intersecting portion of the side surface portion 11a of the common feeder line 11 and the side surface portion 23a of the reflective layer 23 is increased, the length of the intersecting portion L3 is increased, and the organic portion of the intersecting portion is increased. The inclination angle A4 of the step portion 22b of the planarizing film 22 is reduced. As a result, the inclination angle A4 of the side surface portion 23a of the reflective layer 23 formed on the surface of the intersecting portion of the strip-shaped common feeder 11 is reduced. As a result, when the reflective layer 23 is formed on the surface of the step portion 22b of the organic planarizing film 22 corresponding to the strip-shaped common power supply line 11 extending in the direction (X direction) substantially orthogonal to the signal line 6, the reflection is performed. The layer 23 can be prevented from peeling from the organic planarizing film 22.

  In the first embodiment, as described above, one side surface portion 11a of the common power supply line 11 and the side surface portion 23a of the reflective layer 23 are viewed in a plane in an angle range of 5 degrees or more and 60 degrees or less. By arranging so as to cross each other, it is possible to more effectively suppress the reflective layer 23 from being peeled off from the organic planarizing film 22.

  In the first embodiment, as described above, since the insulating film is made of the organic flattening film 22, the insulating film made of the organic flattening film 22 hardly reflects the shape under the insulating film. The height H3 of the step portion 22b formed on the surface of the film can be reduced. Thereby, the inclination angle A4 of the step portion 22b of the organic planarization film 22 can be reduced. Thereby, it can suppress more that the reflection layer 23 formed on the surface of the level | step-difference part 22b of the organic planarization film | membrane 22 peels.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. 13 and FIG. In the second embodiment, unlike the first embodiment described above, a case where the common power supply line 311 is formed in a narrow line shape will be described.

  In the EL device 102 according to the second embodiment of the present invention, as shown in FIG. 13, the common power supply line 311 has a linear shape with a small width in the X direction so as to extend in the Y direction substantially parallel to the signal line 6. Is formed. The EL device 102 is an example of the “display device” in the present invention, and the common power supply line 311 is an example of the “wiring” and the “power supply line” in the present invention. The common power supply line 311 and the signal line 6 are made of the same metal layer such as Al (aluminum).

  The signal line 6 has a protruding portion 306 formed in a direction (arrow X1 direction side) that intersects the direction (Y direction) in which the signal line 6 extends. Both side portions 306a of the protruding portion 306 are arranged in parallel to each other when viewed in a plan view.

  As shown in FIG. 14, a reflective layer 323 is formed on the surface of the common power supply line 311. Here, in the second embodiment, as shown in FIG. 15, the reflective layer 323 of the common power supply line 311 in the cross section of the portion where the side surface part 311 a of the common power supply line 311 and the side surface part 323 a of the reflective layer 323 intersect. Both side surface portions 311a of the portion intersecting with the side surface portion 323a are formed so as to intersect with each other at an angle A7 smaller than 90 degrees and to extend parallel to each other when seen in a plan view.

  In the second embodiment, in the cross section of the portion where the side surface portion 306a of the protruding portion 306 of the signal line 6 intersects the side surface portion 323a of the reflective layer 323, the side surface portion 306a of the protruding portion 306 of the signal line 6; The side surface portion 323a of the reflective layer 323 is disposed so as to intersect at an angle A8 smaller than 90 degrees when viewed in a plan view.

  In addition, the other structure of 2nd Embodiment is the same as that of the structure of 1st Embodiment mentioned above.

  In the second embodiment, as described above, the side surface portion 311a of the common power supply line 311 and the side surface portion 323a of the reflective layer 323 are arranged so as to intersect at an angle A7 that is not orthogonal when viewed in a plan view. Accordingly, as in the EL device 102a of the comparative example illustrated in FIG. 16, the side surface portion 411a of the common power supply line 411 and the side surface portion 423a of the reflective layer 423 intersect with each other at an angle of 90 degrees when viewed in plan. The length of the intersecting portion of the EL device 102 of the present invention is larger than the length of the intersecting portion of the side surface portion 411a of the common power supply line 411 and the side surface portion 423a of the reflective layer 423. Becomes larger. As a result, the inclination angle of the stepped portion 22b of the organic planarizing film 22 at the intersecting portion is reduced by the length of the intersecting portion being increased. Thus, the inclination angle A7 of the side surface portion 323a of the reflective layer 323 formed on the surface of the common power supply line 311 is the inclination angle of the step portion of the organic planarization film and the side surface portion of the reflective layer of the EL device 102a according to the comparative example. Therefore, it is possible to prevent the portion of the reflective layer 323 of the EL device 102 of the present invention formed on the surface of the step portion 22b of the organic planarization film 22 from being separated from the organic planarization film 22. it can.

  Further, in the second embodiment, as described above, both the side surface portions 311a of the portion of the linear common power supply line 311 that intersects the side surface portion 323a of the reflective layer 323 are viewed in plan, and the reflection layer 323 By inclining at a non-orthogonal angle A7 with respect to the side surface portion 323a and arranging them in parallel with each other, the length of the portion where the side surface portion 311a of the linear common power supply line 311 and the side surface portion 323a of the reflective layer 323 intersect with each other Therefore, the length of the intersecting portion is larger than the case where the side surface portion 311a of the linear common feeder 311 and the side surface portion 323a of the reflective layer 323 intersect (orthogonal) at 90 degrees. The inclination angle of the stepped portion 22b of the organic planarizing film 22 at the intersecting portion becomes small. Thereby, when the reflective layer 323 is formed on the surface of the step portion 22b of the organic planarization film 22 corresponding to the linear common power supply line 311 extending along the extending direction of the signal line 6 (Y direction), The reflective layer 323 can be prevented from peeling from the organic planarizing film 22.

  Further, in the second embodiment, as described above, by arranging the side surface portion 306a of the protruding portion 306 of the signal line 6 and the side surface portion 323a of the reflective layer 323 so as not to be orthogonal to each other in plan view, Since the length of the intersection between the side surface portion 306a of the protruding portion 306 of the signal line 6 and the side surface portion 323a of the reflective layer 323 is increased, the side surface portion 306a of the protruding portion 306 of the signal line 6 and the side surface of the reflective layer 323 Compared with the case where the portion 323a intersects (orthogonally) at 90 degrees, the inclination angle of the stepped portion 22b of the organic planarizing film 22 at the intersecting portion is reduced by the length of the intersecting portion. Thereby, it is possible to prevent the reflective layer 323 formed on the surface of the stepped portion 22 b of the organic planarizing film 22 corresponding to the protruding portion 306 of the signal line 6 from being peeled off from the organic planarizing film 22.

  In the second embodiment, as described above, the common power supply line 311 and the signal line 6 are formed of the same layer, so that the common power supply line 311 and the signal intersect with the reflection layer 323 at an angle smaller than 90 degrees. The line 6 can be formed by the same process.

  FIGS. 17 to 19 are diagrams for explaining first to third examples of electronic devices using the EL devices 101 and 102 according to the first and second embodiments, respectively. Electronic devices using the EL devices 101 and 102 according to the first and second embodiments will be described with reference to FIGS.

  As shown in FIGS. 17 to 19, EL devices 101 and 102 according to the first and second embodiments include a PC (Personal Computer) 200 as a first example, a mobile phone 300 as a second example, and It can be used for a portable information terminal 400 (PDA: Personal Digital Assistants) as a third example. In the PC 200 according to the first example of FIG. 17, the EL devices 101 and 102 according to the first and second embodiments can be used for the input unit 200a such as a keyboard and the display screen 200b. In the mobile phone 300 according to the second example of FIG. 18, the EL devices 101 and 102 according to the first and second embodiments are used for the display screen 300a. In the portable information terminal 400 according to the third example of FIG. 19, the EL devices 101 and 102 according to the first and second embodiments are used for the display screen 400a.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the strip-shaped power supply line, the linear power supply line, and the signal line are applied as an example of the wiring is shown. However, the present invention is not limited to this, and the strip-shaped power supply line is used. The present invention may be applied to the relationship between the reflective layer and the wiring other than the linear power supply line and the signal line.

  Moreover, in the said 1st and 2nd embodiment, although the example using the organic light emitting layer of an organic EL element was shown as an example of a light emitting layer, this invention is not restricted to this but light emission other than the organic light emitting layer of an organic EL element. A layer may be applied.

  In the first and second embodiments, an example in which an organic planarizing film made of a photosensitive acrylic resin is applied as an example of an insulating film is shown. However, the present invention is not limited to this, and a photosensitive acrylic resin is used. The present invention can also be applied to the case where an insulating film other than an organic planarizing film made of a resin is used.

2 pixels 6 signal lines (wiring)
6a, 306 Protruding portion 6b, 306a Side surface portion 11, 311 Common power supply line (wiring) (power supply line)
11a, 113a, 311a Side surfaces 22, 112 Organic planarization film (insulating film)
22b, 112a Step part 23, 113, 323 Reflective layer 23a, 113a, 323a Side face part 26 Organic light emitting layer (light emitting layer)
100, 101, 102 EL device (display device)
111 TFT wiring (wiring)
200 PC (electronic equipment)
300 Mobile phone (electronic equipment)
400 Information portable terminal (electronic equipment)

Claims (11)

A plurality of pixels;
Wiring for supplying a signal or power to each of the plurality of pixels;
An insulating film covering the wiring;
A reflective layer that covers the insulating film and has a side surface that intersects the wiring in a plane;
The cross-sectional shape of the wiring is a trapezoidal shape having a bottom part and a side part inclined inward toward the upper side,
The angle formed by the side surface portion and the bottom side portion of the cross-sectional shape along the side surface portion of the reflective layer of the wiring is smaller than the angle formed by the side surface portion and the bottom side portion of the cross-sectional shape in the width direction of the wiring. , Display device. The insulating film includes a stepped portion in a portion corresponding to the side surface portion of the wiring,
The reflective layer is formed so as to cover the step portion of the insulating film,
The display device according to claim 1, wherein the side surface portion of the wiring and the side surface portion of the reflective layer are arranged so as not to be orthogonal to each other when seen in a plan view. The pixel has a rectangular shape, and a side surface portion of the reflective layer is formed along the rectangular shape of the pixel in a plan view.
The display device according to claim 2, wherein the side surface portion of the wiring is arranged so as not to be orthogonal to the side surface portion of the reflective layer extending along the rectangular shape of the pixel when viewed in a plan view.   The display device according to claim 1, wherein the wiring includes at least one of a power supply line and a signal line. The wiring includes the signal line and the strip-shaped power supply line arranged so as to extend in a direction substantially orthogonal to the signal line in plan view,
The display device according to claim 4, wherein the side surface portion of the strip-shaped power supply line and the side surface portion of the reflective layer are disposed so as not to be orthogonal when viewed in a plan view. The wiring includes the signal line and the power line formed to extend linearly in a direction along the direction in which the signal line extends,
Both side portions of the portion of the linear power supply line that intersects with the side portion of the reflective layer are not orthogonal to the side surface portion of the reflective layer and are arranged parallel to each other when viewed in a plan view. The display device according to claim 4. The wiring includes the signal line,
The signal line is formed with a protruding portion that protrudes in a direction intersecting the direction in which the signal line extends,
The display device according to claim 4, wherein the side surface portion of the protruding portion of the signal line and the side surface portion of the reflective layer are arranged so as not to be orthogonal when viewed in a plan view. The wiring includes both the power line and the signal line,
The display device according to claim 4, wherein the power supply line and the signal line are formed of the same layer.   The one side part of the said wiring and the side part of the said reflection layer are arrange | positioned so that it may cross | intersect in the angle range of 5 to 60 degree | times seeing planarly. Item 1. A display device according to item 1.   The display device according to claim 1, wherein the insulating film is made of an organic planarizing film.   An electronic device comprising the display device according to claim 1.

Images