WO2020082644A1 - 具耐弯折信号线的柔性显示面板 - Google Patents

具耐弯折信号线的柔性显示面板 Download PDF

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Publication number
WO2020082644A1
WO2020082644A1 PCT/CN2019/074842 CN2019074842W WO2020082644A1 WO 2020082644 A1 WO2020082644 A1 WO 2020082644A1 CN 2019074842 W CN2019074842 W CN 2019074842W WO 2020082644 A1 WO2020082644 A1 WO 2020082644A1
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Prior art keywords
layer
metal
holes
flat
metal layer
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PCT/CN2019/074842
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English (en)
French (fr)
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赵瑾荣
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武汉华星光电半导体显示技术有限公司
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Priority to US16/336,693 priority Critical patent/US20210375953A1/en
Publication of WO2020082644A1 publication Critical patent/WO2020082644A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • 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
    • H01L27/124—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 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • 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
    • H01L27/1218—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 with a particular composition or structure of the substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • 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
    • H01L27/124—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 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
    • H01L27/1244—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 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits for preventing breakage, peeling or short circuiting

Definitions

  • the present invention relates to a flexible display panel, and particularly to a flexible display panel with a bending-resistant signal line.
  • the horizontal direction signals are transmitted through the gate, reset, light emission control and other GE metal lines 90;
  • the signals that transmit signals in the vertical direction include SE metal lines 91 such as data and power lines (ELVDD, ELVSS).
  • the shape of the existing GE metal wire 90 or SE metal wire 91 is generally an elongated rectangular strip. This shape cannot effectively relieve stress and crack extension when the display panel is bent. When the stress is greater than When the metal bears the ability, the crack phenomenon is easy to occur, which will lead to the phenomenon that the impedance of the metal line becomes larger or breaks. The cracks will further extend to other membrane layers or other functional areas during the folding process, thereby increasing the probability of occurrence of bad phenomena and shortening the service life of the device.
  • the main purpose of the present invention is to provide a flexible display panel whose signal line has higher stress tolerance, which can effectively relieve stress and block crack extension, thereby extending the service life of the device.
  • the present invention provides a flexible display panel having a plurality of signal lines, at least one of the signal lines includes: a first metal layer including a plurality of spaced metal parts; a first flat A layer disposed on the first metal layer and including a plurality of first through holes, the positions of the first through holes correspond to the metal parts one by one to expose the metal parts; the first flat layer is An inorganic material layer; a second metal layer disposed on the first flat layer, wherein the pattern shape of the second metal layer is a wave shape, and the second metal layer is connected to the first through hole The metal member; and a second flat layer disposed on the second metal layer, the second flat layer is an organic material layer.
  • the first flat layer further includes a plurality of second through holes, the second through holes penetrate the upper surface and the lower surface of the first flat layer; the second metal layer A plurality of through holes are included, and the through holes respectively communicate with the second through holes; and the second flat layer extends to the bottom of the first flat layer through the through holes and the second through holes.
  • the pattern shape of the metal pieces of each first metal layer is rectangular or square; the pattern shape of the second metal layer is a sine wave shape.
  • the first metal layer is a molybdenum layer or a composite layer of a molybdenum layer and an aluminum neodymium alloy layer;
  • the second metal layer is a composite layer of a titanium layer and an aluminum layer.
  • the first metal layer includes two molybdenum layers and an aluminum-neodymium alloy layer sandwiched between the two molybdenum layers; the second metal layer includes two titanium layers and is located between the two An aluminum layer between the two titanium layers.
  • At least two second through holes are provided between two adjacent first through holes.
  • the present invention also provides a flexible display panel having a plurality of signal lines, at least one of the signal lines includes: a first metal layer including a plurality of spaced metal parts; and a first flat layer provided on the first On a metal layer, and includes a plurality of first through holes, the positions of the first through holes correspond to the metal parts one by one to expose the metal parts; and a second metal layer disposed on the first flat On the layer, wherein the pattern shape of the second metal layer is a wave shape, and the second metal layer is connected to the metal piece through the first through hole.
  • the signal line further includes a second flat layer, and the second flat layer is disposed on the second metal layer.
  • the first flat layer further includes a plurality of second through holes, the second through holes penetrate the upper surface and the lower surface of the first flat layer; the second metal layer A plurality of through holes are included, and the through holes respectively communicate with the second through holes; and the second flat layer extends to the bottom of the first flat layer through the through holes and the second through holes.
  • the signal line further includes a second flat layer, and the second flat layer is disposed between the second metal layer and the first flat layer.
  • the first flat layer further includes a plurality of second through holes, the second through holes penetrate the upper surface and the lower surface of the first flat layer; the second metal layer A plurality of through holes are included, and the through holes respectively communicate with the second through holes; and the second flat layer extends to the bottom of the first flat layer through the through holes and the second through holes.
  • the pattern shape of the metal pieces of each first metal layer is rectangular or square; the pattern shape of the second metal layer is a sine wave shape.
  • the first metal layer is a molybdenum layer or a composite layer of a molybdenum layer and an aluminum neodymium alloy layer;
  • the second metal layer is a composite layer of a titanium layer and an aluminum layer.
  • the first metal layer includes two molybdenum layers and an aluminum-neodymium alloy layer sandwiched between the two molybdenum layers; the second metal layer includes two titanium layers and is located between the two An aluminum layer between the two titanium layers.
  • At least two second through holes are provided between two adjacent first through holes.
  • the present invention is mainly to form a signal line of a flexible display panel by connecting the upper and lower metal layers to each other, wherein the lower metal layer is divided into several short rectangular or square metal parts arranged at intervals, and two adjacent metal parts There is a flat layer between them; the pattern shape of the upper metal layer is wavy, and the metal parts of the lower metal layer can be connected through the through holes of the flat layer, and the other through holes of the flat layer are filled with organic matter.
  • the wave shape design of the upper metal layer can effectively relieve the stress, and the organic matter in the through hole of the flat layer can improve the stress tolerance of the inorganic flat layer between the two metal layers, thereby extending the service life of the device.
  • FIG. 1 is a schematic diagram of a metal circuit of a conventional display panel.
  • FIG. 2 is a schematic plan view of a signal line of a flexible display panel according to an embodiment of the invention.
  • 3A is a cross-sectional view of a signal line of a flexible display panel according to an embodiment of the invention.
  • 3B is a cross-sectional view of a signal line of a flexible display panel according to another embodiment of the invention.
  • FIG. 2 is a schematic plan view of a signal line of a flexible display panel according to an embodiment of the present invention.
  • FIG. 3A is a cross-sectional view of a signal line of a flexible display panel according to an embodiment of the present invention.
  • the signal line of the flexible display panel of the present invention is preferably applicable to, for example, an ESD protection line, a dummy metal line, or a line with low impedance requirements in the fan-out area of the flexible display panel.
  • the signal line mainly includes a first metal layer 10 1.
  • the first metal layer 10 includes several metal pieces arranged at intervals.
  • the pattern of the metal pieces of each first metal layer 10 is rectangular or square, or is close to rectangular or square.
  • the first metal layer 10 may be a molybdenum layer or a composite layer of a molybdenum layer and an aluminum neodymium alloy layer.
  • the first metal layer 10 may be a composite layer of a molybdenum layer and an aluminum-neodymium alloy layer, it may include a molybdenum layer and an aluminum-neodymium alloy layer, or may include two molybdenum layers and be located between the molybdenum layers.
  • the aluminum-neodymium alloy layer between the two molybdenum layers can effectively reduce the impedance of the trace.
  • the first flat layer 20 is disposed on the first metal layer 10 and includes several first through holes 21, and may further include several second through holes 22.
  • the positions of the first through holes 21 correspond to the metal parts of the first metal layer 10 one by one to expose the metal parts.
  • the second through hole 22 penetrates the upper surface and the lower surface of the first flat layer 20.
  • the first flat layer 20 is an inorganic material layer.
  • at least two second through holes 22 are spaced between two adjacent first through holes 21, but not limited thereto.
  • the second metal layer 30 is disposed on the first flat layer 20, and further as shown in FIG. 2, the pattern shape of the second metal layer 30 is a wave shape, for example, preferably Can be sinusoidal wavy.
  • the second metal layer 30 is connected to the metal member 10 through the first through-hole 21, thereby forming one or more signal lines made by interconnecting the two lower metal layers.
  • the signal line formed by the wave pattern shape design of the second metal layer 30 can effectively relieve the stress received when the display panel is bent, thereby extending the service life of the device.
  • the second metal layer 30 may be a composite layer of a titanium layer and an aluminum layer.
  • the second metal layer 30 may include two titanium layers and an aluminum layer sandwiched between the two titanium layers.
  • the signal line may further include a second flat layer 40.
  • the second flat layer 40 is disposed on the second metal layer 30, and preferably, the second flat layer is an organic material layer.
  • the second metal layer 30 further includes a plurality of through holes 31, and the through holes 31 respectively correspond to the second through holes 22 that communicate with the first flat layer 20, so that The second flat layer extends to the bottom of the first flat layer 20 through the through hole 31 and the second through hole 22.
  • the signal line of the entire flexible display panel as shown in FIG. 3A becomes four layers from top to bottom including the organic layer (ie the second flat layer), the metal layer (ie the second metal layer), and the inorganic layer ( Namely the first flat layer) and the metal layer (ie the first metal layer) laminated structure, wherein the through hole 31 of the second metal layer 30 and the second through hole 22 of the first flat layer 20 fill the second flat layer organic material.
  • the signal line formed by the wave pattern shape design of the second metal layer 30 can effectively relieve the stress received when the display panel is bent;
  • the through hole 31 of the second metal layer 30 can be used To block the small cracks in the metal layer to further expand the other parts of the metal layer, to avoid causing the entire metal layer to be disconnected and functional failure;
  • the organic material filled in the through hole 31 and the second through hole 22 can effectively improve the two metal layers
  • the stress tolerance ability of the inorganic substance between them can prevent the cracks of the inorganic layer from extending further.
  • the organic material of the second flat layer 40 is more elastic and cushioning, the stress can be buffered and offset so that the stress does not accumulate on structural defects (such as cracks) of the inorganic material layer (first flat layer 20) As a result, the overall signal line is broken.
  • FIG. 3B is a cross-sectional view of a signal line of a flexible display panel according to another embodiment of the present invention.
  • the main difference between this embodiment and the embodiment of FIG. 3A is that the arrangement order of the second flat layer 40 and the second metal layer 30 is different.
  • the second flat layer 40 is first disposed on the first flat layer 20, and then the second metal layer 30 is disposed on the second flat layer 40, so that the first The second flat layer 40 is disposed between the second metal layer 30 and the first flat layer 20.
  • the second metal layer 30 may not have the through hole 31 in this embodiment.
  • the second flat layer 40 directly extends to the bottom of the first flat layer 20 through the second through hole 22 of the first flat layer 20.
  • the second flat layer 40 includes several third through holes 41, wherein the third through holes 41 respectively correspond to the first through holes 21 of the first flat layer 20, so that the The second metal layer 30 is connected to the metal part of the first metal layer 10 through the third through hole 41 and the first through hole 21.
  • the signal line formed by the wave pattern shape design of the second metal layer 30 can effectively relieve the stress received when the display panel is bent; the second flat layer 40 made of the organic material is in the first position Between the metal layer 10 and the second metal layer 30, and the second through hole 22 of the first flat layer 20 is also filled with the organic material of the second flat layer 40, which can also effectively improve the inorganic between the two metal layers
  • the stress tolerance of the material prevents the cracks of the inorganic layer from extending further.
  • the present invention is mainly to form a signal line of a flexible display panel by connecting the upper and lower metal layers to each other, wherein the first metal layer of the lower layer is divided into several short-arranged Strip-shaped rectangular or square metal parts with an inorganic flat layer (ie the first flat layer) between two adjacent metal parts; the pattern of the second metal layer on the upper layer is wavy and can pass through the holes of the inorganic flat layer
  • the metal parts connected to the lower first metal layer, and the other through holes of the inorganic flat layer are filled with organic substances (ie, the extended portions of the organic second flat layer).
  • the wave pattern design of the upper second metal layer can effectively relieve the stress, and the organic matter in the through hole of the inorganic flat layer can improve the stress tolerance of the inorganic flat layer between the two metal layers, thereby extending the service life of the device.

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Abstract

一种柔性显示面板，具有多条信号线，至少一所述信号线包括第一金属层、第一平坦层及第二金属层。所述第一金属层包含数个间隔设置的金属件。所述第一平坦层设置于所述第一金属层上，且包括数个第一通孔，所述第一通孔位置一一对应所述金属件，以裸露所述金属件。所述第二金属层设置于所述第一平坦层上，其中所述第二金属层的图案形状为一波浪形状，所述第二金属层通过所述第一通孔连接至所述金属件。

Description

具耐弯折信号线的柔性显示面板 技术领域
本发明有关一种柔性显示面板，特别是有关于一种具耐弯折信号线的柔性显示面板。
 背景技术
请参考图1所示，在现有柔性显示面板中，从扇出(fan-out)区域到可操作区(Active area)，传递水平方向信号的有栅极、复位、发光控制等GE金属线90；传递垂直方向的信号有数据、电源线(ELVDD、ELVSS)等SE金属线91。
 技术问题
现有的GE金属线90或者SE金属线91的形状一般为细长条状的长方形，此种形状在显示面板进行弯折时，不能有效地舒缓应力和阻隔裂缝(Crack)延伸，当应力大于金属承受的能力时，容易发生裂缝现象，会导致出现金属线路阻抗变大或者断裂的现象。裂缝会在折叠过程中进一步延伸至其他的膜层或者其他功能区，从而加重不良现象的产生机率，缩短器件的使用寿命。
故，有必要提供一种具耐弯折信号线的柔性显示面板，以解决现有技术所存在的问题。
 技术解决方案
有鉴于现有技术的缺点，本发明的主要目的在于提供一种柔性显示面板，其信号线具有更高的应力耐受能力，可以有效舒缓应力和阻隔裂缝延伸，进而延长器件的使用寿命。
为达成本发明的前述目的，本发明提供一种柔性显示面板，具有多条信号线，至少一所述信号线包括：一第一金属层，包含数个间隔设置的金属件；一第一平坦层，设置于所述第一金属层上，且包括数个第一通孔，所述第一通孔位置一一对应所述金属件，以裸露所述金属件；所述第一平坦层为无机材料层；一第二金属层，设置于所述第一平坦层上，其中所述第二金属层的图案形状为一波浪形状，所述第二金属层通过所述第一通孔连接至所述金属件；以及一第二平坦层，设置于所述第二金属层上，所述第二平坦层为有机材料层。
在本发明的一实施例中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；所述第二金属层包括数个贯孔，所述贯孔分别对应连通所述第二通孔；以及所述第二平坦层通过所述贯孔与所述第二通孔延伸至所述第一平坦层的底部。
在本发明的一实施例中，每一所述第一金属层的金属件的图案形状为长方形或正方形；所述第二金属层的图案形状为正弦波浪形状。
在本发明的一实施例中，所述第一金属层为一钼层或一钼层与铝钕合金层的复合层；所述第二金属层为钛层与铝层的复合层。
在本发明的一实施例中，所述第一金属层包含两钼层及位于夹于所述两钼层之间的一铝钕合金层；所述第二金属层包含两钛层及位于夹于所述两钛层之间的一铝层。
在本发明的一实施例中，相邻两个第一通孔之间间隔设有至少两个所述第二通孔。
本发明还提供一种柔性显示面板，具有多条信号线，至少一所述信号线包括：一第一金属层，包含数个间隔设置的金属件；一第一平坦层，设置于所述第一金属层上，且包括数个第一通孔，所述第一通孔位置一一对应所述金属件，以裸露所述金属件；以及一第二金属层，设置于所述第一平坦层上，其中所述第二金属层的图案形状为一波浪形状，所述第二金属层通过所述第一通孔连接至所述金属件。
在本发明的一实施例中，所述信号线还包括一第二平坦层，所述第二平坦层设置于所述第二金属层上。
在本发明的一实施例中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；所述第二金属层包括数个贯孔，所述贯孔分别对应连通所述第二通孔；以及所述第二平坦层通过所述贯孔与所述第二通孔延伸至所述第一平坦层的底部。
在本发明的一实施例中，所述信号线还包括一第二平坦层，所述第二平坦层设置于所述第二金属层与所述第一平坦层之间。
在本发明的一实施例中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；所述第二金属层包括数个贯孔，所述贯孔分别对应连通所述第二通孔；以及所述第二平坦层通过所述贯孔与所述第二通孔延伸至所述第一平坦层的底部。
在本发明的一实施例中，每一所述第一金属层的金属件的图案形状为长方形或正方形；所述第二金属层的图案形状为正弦波浪形状。
在本发明的一实施例中，所述第一金属层为一钼层或一钼层与铝钕合金层的复合层；所述第二金属层为钛层与铝层的复合层。
在本发明的一实施例中，所述第一金属层包含两钼层及位于夹于所述两钼层之间的一铝钕合金层；所述第二金属层包含两钛层及位于夹于所述两钛层之间的一铝层。
在本发明的一实施例中，相邻两个第一通孔之间间隔设有至少两个所述第二通孔。
 有益效果
本发明主要是以上下两层金属层相互连接的方式制作成柔性显示面板的信号线，其中下层的金属层区分成数个间隔排列的短条状长方形或者正方形金属件，相邻两个金属件之间设有平坦层；上层金属层的图案形状为波浪形状，可通过平坦层的通孔连接下层的金属层的金属件，平坦层的其他通孔则填充有机物。上层金属层的波浪形状设计可有效缓释应力，平坦层通孔中的有机物可以提高两层金属层之间的无机平坦层的应力耐受能力，进而延长器件的使用寿命。
 附图说明
图1是现有显示面板的金属线路的示意图。
图2是本发明一实施例的柔性显示面板的信号线的平面示意图。
图3A是本发明一实施例的柔性显示面板的信号线的剖视图。
图3B是本发明另一实施例的柔性显示面板的信号线的剖视图。
 本发明的实施方式
为让本发明上述目的、特征及优点更明显易懂，下文特举本发明较佳实施例，并配合附图，作详细说明如下。再者，本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
请参考图2和图3A所示，图2是本发明一实施例的柔性显示面板的信号线的平面示意图；图3A则是本发明一实施例的柔性显示面板的信号线的剖视图。
本发明的柔性显示面板的信号线优选可应用于例如柔性显示面板的扇出区域的ESD防护线路、Dummy金属线或者阻抗要求不高的线路上，所述信号线主要包括一第一金属层10、一第一平坦层20及一第二金属层30。
如图2和图3A所示，所述第一金属层10包含数个间隔设置的金属件。在一实施例中，每一所述第一金属层10的金属件的图案形状为长方形或正方形，或者是接近长方形或正方形。再者，在一实施例中，所述第一金属层10可为一钼层或一钼层与铝钕合金层的复合层。例如，当所述第一金属层10可为钼层与铝钕合金层的复合层时，其可以是包含一钼层与一铝钕合金层，也可以是包含两钼层及位于夹于所述两钼层之间的一铝钕合金层，这样的组成可以有效降低走线的阻抗。
如图2和图3A所示，所述第一平坦层20设置于所述第一金属层10上且包括数个第一通孔21，并可进一步包括数个第二通孔22。所述第一通孔21位置一一对应所述第一金属层10的金属件，以裸露所述金属件。如图3A所示，所述第二通孔22贯穿所述第一平坦层20的上表面与下表面。在本实施例中，所述第一平坦层20为无机材料层。在一实施例中，在所述第一平坦层20中，相邻两个第一通孔21之间间隔设有至少两个所述第二通孔22，但不在此限。
如图3A所示，所述第二金属层30是设置于所述第一平坦层20上，且进一步如图2所示，所述第二金属层30的图案形状为一波浪形状，例如优选可以是正弦波浪形状。所述第二金属层30是通过所述第一通孔21连接至所述金属件10，进而构成一种以上下两层金属层相互连接方式制作成的信号线。通过上述第二金属层30的波浪图案形状设计所构成的信号线可有效缓释显示面板被弯折时受到的应力，进而能延长器件的使用寿命。在一实施例中，所述第二金属层30可以为钛层与铝层的复合层。例如，所述第二金属层30可以是包含两钛层及位于夹于所述两钛层之间的一铝层。
如图3A所示，在一优选实施例中，所述信号线还可包括一第二平坦层40。在图3A的实施例中，所述第二平坦层40是设置于所述第二金属层30上，且优选的，所述第二平坦层为有机材料层。在如图3A所示的实施例中，所述第二金属层30还包括数个贯孔31，所述贯孔31分别对应连通所述第一平坦层20的第二通孔22，使得所述第二平坦层通过所述贯孔31与所述第二通孔22延伸至所述第一平坦层20的底部。
如此一来，如图3A所示的整个柔性显示面板的信号线便成了四层由上而下包含有机层(即第二平坦层)、金属层(即第二金属层)、无机层(即第一平坦层)及金属层(即第一金属层)的层叠结构，其中第二金属层30的贯孔31和第一平坦层20的第二通孔22填充所述第二平坦层的有机材料。在这样的结构中，所述第二金属层30的波浪图案形状设计所构成的信号线可有效缓释显示面板被弯折时受到的应力；所述第二金属层30的贯孔31可以用来阻隔金属层中的小裂缝进一步扩大金属层的其他部位，避免导致整层金属层断开，出现功能失效；又贯孔31和第二通孔22填充的有机材料可以有效提高两层金属层之间的无机物应力耐受能力，阻隔无机层的裂缝(crack)进一步延伸。换言之，由于第二平坦层40的有机材料较具有弹性及缓冲能力，可把应力予以缓冲抵销，使应力不会累积在无机材料层(第一平坦层20)的结构缺陷(例如裂缝)上而导致整体信号线破裂。
进一步参考图3B所示，图3B是本发明另一实施例的柔性显示面板的信号线的剖视图。该实施例与图3A实施例的主要差异是，所述第二平坦层40和所述第二金属层30的设置顺序不同。
如图3B所示，所述第二平坦层40是先设置于所述第一平坦层20上，接着再设置所述第二金属层30于所述第二平坦层40上，使得所述第二平坦层40设置于所述第二金属层30与所述第一平坦层20之间。
更具体而言，所述第二金属层30在本实施例中可不具有所述贯孔31。所述第二平坦层40直接通过所述第一平坦层20的第二通孔22延伸至所述第一平坦层20的底部。所述第二平坦层40在本实施例中包括数个第三通孔41，其中所述第三通孔41分别对应连通所述第一平坦层20的第一通孔21，以使所述第二金属层30通过所述第三通孔41与所述第一通孔21连接至所述第一金属层10的金属件。
通过上述结构，所述第二金属层30的波浪图案形状设计所构成的信号线可有效缓释显示面板被弯折时受到的应力；所述有机材料构成的第二平坦层40位在第一金属层10和第二金属层30之间，且所述第一平坦层20的第二通孔22也充满了第二平坦层40的有机材料，同样可以有效提高两层金属层之间的无机物应力耐受能力，阻隔无机层的裂缝(crack)进一步延伸。
综上所述，相较于现有技术，本发明主要是以上下两层金属层相互连接的方式制作成柔性显示面板的信号线，其中下层的第一金属层区分成数个间隔排列的短条状长方形或者正方形金属件，相邻两个金属件之间设有无机平坦层(即第一平坦层)；上层的第二金属层的图案形状为波浪形状，可通过无机平坦层的通孔连接下层的第一金属层的金属件，无机平坦层的其他通孔(即第二通孔)则填充有机物(即有机第二平坦层的延伸部分)。上层第二金属层的波浪图案设计可有效缓释应力，无机平坦层通孔中的有机物可以提高两层金属层之间的无机平坦层的应力耐受能力，进而延长器件的使用寿命。
本发明已由上述相关实施例加以描述，然而上述实施例仅为实施本发明的范例。必需指出的是，已公开的实施例并未限制本发明的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本发明的范围内。

Claims (17)

  1. 一种柔性显示面板，具有多条信号线，其中至少一所述信号线包含：
    一第一金属层，包含数个间隔设置的金属件；
    一第一平坦层，设置于所述第一金属层上，且包括数个第一通孔，所述第一通孔位置一一对应所述金属件，以裸露所述金属件；所述第一平坦层为无机材料层；
    一第二金属层，设置于所述第一平坦层上，其中所述第二金属层的图案形状为一波浪形状，所述第二金属层通过所述第一通孔连接至所述金属件；以及
    一第二平坦层，设置于所述第二金属层上，所述第二平坦层为有机材料层。
  2. 如权利要求1所述的柔性显示面板，其中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；
    所述第二金属层包括数个贯孔，所述贯孔分别对应连通所述第二通孔；以及
    所述第二平坦层通过所述贯孔与所述第二通孔延伸至所述第一平坦层的底部。
  3. 如权利要求1所述的柔性显示面板，其中，每一所述第一金属层的金属件的图案形状为长方形或正方形；所述第二金属层的图案形状为正弦波浪形状。
  4. 如权利要求1所述的柔性显示面板，其中，所述第一金属层为一钼层或一钼层与铝钕合金层的复合层；所述第二金属层为钛层与铝层的复合层。
  5. 如权利要求4所述的柔性显示面板，其中，所述第一金属层包含两钼层及位于夹于所述两钼层之间的一铝钕合金层；所述第二金属层包含两钛层及位于夹于所述两钛层之间的一铝层。
  6. 如权利要求2所述的柔性显示面板，其中，相邻两个第一通孔之间间隔设有至少两个所述第二通孔。
  7. 一种柔性显示面板，具有多条信号线，其中至少一所述信号线包含：
    一第一金属层，包含数个间隔设置的金属件；
    一第一平坦层，设置于所述第一金属层上，且包括数个第一通孔，所述第一通孔位置一一对应所述金属件，以裸露所述金属件；以及
    一第二金属层，设置于所述第一平坦层上，其中所述第二金属层的图案形状为一波浪形状，所述第二金属层通过所述第一通孔连接至所述金属件。
  8. 如权利要求7所述的柔性显示面板，其中，所述信号线还包括一第二平坦层，所述第二平坦层设置于所述第二金属层上。
  9. 如权利要求8所述的柔性显示面板，其中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；
    所述第二金属层包括数个贯孔，所述贯孔分别对应连通所述第二通孔；以及
    所述第二平坦层通过所述贯孔与所述第二通孔延伸至所述第一平坦层的底部。
  10. 如权利要求7所述的柔性显示面板，其中，所述信号线还包括一第二平坦层，所述第二平坦层设置于所述第二金属层与所述第一平坦层之间。
  11. 如权利要求10所述的柔性显示面板，其中，所述第一平坦层还包含数个第二通孔，所述第二通孔贯穿所述第一平坦层的上表面与下表面；以及
    所述第二平坦层通过所述第二通孔延伸至所述第一平坦层的底部；所述第二平坦层包括数个第三通孔，所述第三通孔分别对应连通所述第一平坦层的第一通孔，以使所述第二金属层通过所述第三通孔与所述第一通孔连接至所述金属件。
  12. 如权利要求7所述的柔性显示面板，其中，所述第一平坦层为无机材料层；所述第二平坦层为有机材料层。
  13. 如权利要求7所述的柔性显示面板，其中，每一所述第一金属层的金属件的图案形状为长方形或正方形；所述第二金属层的图案形状为正弦波浪形状。
  14. 如权利要求7所述的柔性显示面板，其中，所述第一金属层为一钼层或一钼层与铝钕合金层的复合层；所述第二金属层为钛层与铝层的复合层。
  15. 如权利要求14所述的柔性显示面板，其中，所述第一金属层包含两钼层及位于夹于所述两钼层之间的一铝钕合金层；所述第二金属层包含两钛层及位于夹于所述两钛层之间的一铝层。
  16. 如权利要求9所述的柔性显示面板，其中，相邻两个第一通孔之间间隔设有至少两个所述第二通孔。
  17. 如权利要求11所述的柔性显示面板，其中，相邻两个第一通孔之间间隔设有至少两个所述第二通孔。
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CN109887928B (zh) * 2019-01-24 2021-05-07 武汉华星光电半导体显示技术有限公司 一种柔性显示面板
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CN112002699B (zh) * 2020-08-05 2023-04-07 武汉华星光电半导体显示技术有限公司 柔性显示面板及显示装置
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