WO2015062273A1 - 阵列基板及其制作方法、显示装置 - Google Patents
阵列基板及其制作方法、显示装置 Download PDFInfo
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- WO2015062273A1 WO2015062273A1 PCT/CN2014/079448 CN2014079448W WO2015062273A1 WO 2015062273 A1 WO2015062273 A1 WO 2015062273A1 CN 2014079448 W CN2014079448 W CN 2014079448W WO 2015062273 A1 WO2015062273 A1 WO 2015062273A1
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- Prior art keywords
- signal transmission
- line
- impedance
- array substrate
- transmission line
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- 239000000758 substrate Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims description 41
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000008054 signal transmission Effects 0.000 claims abstract description 204
- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- 239000002184 metal Substances 0.000 claims description 32
- 238000005530 etching Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 13
- 238000002161 passivation Methods 0.000 description 15
- 238000001312 dry etching Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000007687 exposure technique Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/27—Manufacturing methods
- H01L2224/278—Post-treatment of the layer connector
- H01L2224/2783—Reworking, e.g. shaping
- H01L2224/27831—Reworking, e.g. shaping involving a chemical process, e.g. etching the layer connector
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
Definitions
- a signal transmission line in a display panel such as a data line or a gate line, in a fenout. It is set to several specific pad areas on the periphery of the display panel to realize signal transmission with devices outside the display panel.
- the signal transmission line near the edge of the line area is the longest.
- the signal transmission line 1 in Figure 1 has the largest line resistance, which is Rmax.
- the signal transmission line located at the center of the hub area is the shortest.
- the signal transmission line 3 in Fig. 1 has a minimum line resistance of Rmin.
- a zigzag design is usually used, as shown by the signal transmission lines 2 and 3 in FIG.
- the line resistance of the signal transmission line in the center region of the cluster region is increased. That is, by increasing the Rmin value, the resistance gap between Rmax and Rmin is reduced to achieve equal resistance design of different signal transmission lines.
- the fold line design increases the width of the signal transmission line
- the width of the signal transmission line 3 in FIG. 1 is d, and the area of the port area and the line area is limited, thereby causing a signal transmission line disposed in the port area.
- the number is reduced. This requires more port areas on the pand to enable signal extraction, which not only increases the production cost of the display panel, but also displays The layout of the panel has increased the difficulty.
- Rmax/Rmin is greater than 3: ⁇ , which may cause signal delay and poor formation.
- the invention provides an array substrate, a manufacturing method thereof and a display device, so that the electric ffi ratio between the signal transmission channels corresponding to each signal transmission line in the port region can be realized in a preset range without increasing the port area. Inside, to reduce signal delay.
- An embodiment of the present invention provides an array substrate, where a line region of the array substrate includes a plurality of signal transmission lines for transmitting signals between a driving chip and a display area of the array substrate, and each of the signal transmission lines corresponds to one data.
- the transmission channel, the array substrate further includes:
- the first preset condition is:
- the difference in impedance of at least one pair of data transmission channels after the impedance balance line is configured is less than the difference in impedance of the pair of data transmission channels before the impedance balance line is configured.
- the first preset condition is:
- the impedance difference between the data transmission channel having the largest impedance value and the data transmission channel having the smallest impedance value in the hub region is smaller than the data having the largest impedance value in the hub region before configuring the impedance balance line.
- the impedance difference between the transmission channel and the data transmission channel with the lowest impedance value is smaller than the data having the largest impedance value in the hub region before configuring the impedance balance line.
- the first preset condition is:
- the maximum impedance difference between each data transmission channel in the hub area is within a preset threshold range.
- the impedance balance line and the associated signal transmission line are formed in different layers.
- the impedance balancing line is formed in a conductive layer of the array substrate, and the conductive layer includes at least one of a pixel electrode layer, a common electrode layer, a source/drain metal layer, and a gate layer.
- the impedance balance line is in direct contact with the associated signal transmission line, or the impedance balance line and the associated signal transmission line are electrically connected through the via hole.
- the ffi anti-balance line consists of at least one electrically conductive line.
- the impedance balance lines belonging to different signal transmission lines have different conductive areas and/or materials.
- ffi anti-balancing lines belonging to different signal transmission lines are set to:
- the resistivity of the material of the impedance balance line is smaller.
- the signal transmission line is formed in a source/drain metal layer, and the impedance balance line is formed in the pixel electrode layer and the Z or gate layer.
- the embodiment of the present invention further provides a method for fabricating an array substrate, wherein the line region of the array substrate includes a plurality of signal transmission lines for transmitting signals between the driving chip and the display area of the array substrate, and each signal transmission line corresponds to In a data transmission channel, the method includes:
- the first preset condition Forming an impedance balance line on the associated signal transmission line of the plurality of signal transmission lines, the impedance balance line being electrically connected to the associated signal transmission line, such that the impedance difference of different data transmission channels in the line region is consistent The first preset condition.
- step of forming an impedance balance line on the associated signal transmission line of the plurality of signal transmission lines includes:
- An impedance balance line pattern is formed over the signal transmission line.
- step of forming an impedance balance line on the associated signal transmission line of the plurality of signal transmission lines includes:
- An impedance balance line pattern is formed over the layer above the signal transmission line, and at the via location.
- the embodiment of the present invention further provides a display device, which may specifically include the array substrate provided by the above embodiments of the present invention.
- the array substrate and the manufacturing method thereof and the display device include signals for transmitting between the driving chip and the display area of the array substrate in the line region of the array substrate.
- a plurality of signal transmission lines each of the signal transmission lines corresponding to a data transmission channel
- the column substrate further includes: at least one impedance balance line corresponding to the associated signal transmission line of the plurality of signal transmission lines;
- the line is electrically connected to the associated signal transmission line such that the difference in impedance of the different data transmission channels in the line region meets the first predetermined condition. Therefore, the resistance ratio between the signal transmission channels corresponding to each signal transmission line in the port area can be realized within a preset range without increasing the port area, so as to reduce the signal delay.
- FIG. 1 is a schematic structural view of an array substrate provided by the prior art
- FIG. 2 is a schematic structural view 1 of an array substrate according to an embodiment of the present invention.
- FIG. 3 is a schematic structural view 2 of an array substrate according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of an array substrate according to an embodiment of the present invention: i.
- Figure 5 is a view of the present invention: an array substrate provided;
- Embodiments of the present invention provide an array substrate.
- the fenout of the array substrate includes a plurality of signal transmission lines 20 for transmitting signals between the driving chip and the display area of the array substrate, and each of the signal transmission lines 20 corresponds to a data transmission channel.
- the array substrate further includes:
- At least one impedance balancing line 10 corresponding to the signal transmission line 20 of the plurality of signal transmission lines 20;
- the impedance equalization line 10 is electrically connected to the associated signal transmission line 20 such that the difference in impedance of the different data transmission channels in the line region meets the first predetermined condition.
- the impedance value of the data transmission channel corresponding to the different signal transmission lines is adjusted by configuring the impedance balance line for the signal transmission line, thereby not increasing In the case of the port area, the difference between the impedances of the signal transmission channels corresponding to the different signal transmission lines 20 in the hub area is achieved according to the first preset condition to reduce the signal delay.
- the first preset condition may be flexibly set.
- the first preset condition may be: at least one pair after the impedance balancing line 10 is configured.
- the difference in impedance of the data transmission channel is less than the difference in impedance of the pair of data transmission channels before the impedance balance line 10 is configured.
- the impedance difference between the first data transmission channel and the second data transmission channel is 5 (the unit is omitted) in the hub region of the array substrate, wherein the first data transmission channel
- the ffi resistance value of the corresponding first signal transmission line is greater than the impedance value of the second signal transmission line corresponding to the second data transmission channel.
- the impedance difference between the first data transmission channel and the second data transmission channel is less than 5.
- the difference between the impedances between the first data transmission channel and the second data transmission channel is equal to or close to zero.
- the first preset condition may further be: an impedance between the data transmission channel having the largest impedance value and the data transmission channel having the smallest impedance value after the impedance balance line 10 is configured. The difference is smaller than the impedance difference between the data transmission channel having the largest impedance value and the data transmission channel having the smallest impedance value in the front line region before the impedance balance line 10 is configured.
- the signal transmission line 20 located at the edge of the line area has the largest impedance value
- the signal transmission line 21 located at the center of the line area has the lowest impedance value.
- an impedance balance line 10 can be disposed for the signal transmission line 20, thereby reducing the impedance value of the data transmission channel corresponding to the signal transmission line 20. Therefore, in the case that the impedance value of the data transmission channel corresponding to the signal transmission line 21 is constant, the ratio of the impedance value between the data transmission channel corresponding to the signal transmission line 20 and the data transmission channel corresponding to the signal transmission line 21 is reduced, and the two data transmission channels are reduced.
- the difference between the impedances causes the difference to conform to a predetermined condition, such as equal to or near zero.
- the first preset condition may further be: after the impedance balancing line 10 is configured, the maximum impedance difference between each data transmission channel in the line region is within a preset threshold.
- the "maximum impedance difference" involved in the embodiment of the present invention may specifically refer to the impedance difference between the two channels having the largest value among the impedances between any two data transmission channels.
- the impedance values may be configured differently for different signal transmission lines 20.
- the impedance is balanced by the line 10, and the signal transmission time can be adjusted in the line area.
- the impedance value of the signal line 20 of the line region is adjusted by setting the impedance balance line 10 of different impedance values, and matching with the ffi value of the original signal transmission line in the array substrate, thereby adjusting the signal transmission time.
- the ffi anti-equalization line 10 for which one or some of the signal transmission lines 20, which can be arbitrarily determined based on actual needs.
- the impedance balance line 10 with different conductive areas and/or different materials may be configured for different signal transmission lines 20 to achieve The above purpose.
- the conductive areas are different, and can be realized by adjusting the length, width, thickness, and the like of the impedance balance line 10.
- the impedance value of the data transmission channel can be adjusted by adjusting at least one of the length and the material of the impedance balance line 10.
- the embodiment of the present invention may set impedance balance lines belonging to different signal transmission lines according to at least one of the following principles:
- the above principles can also be arbitrarily increased and adjusted based on actual needs.
- the impedance balancing line 10 may be specifically formed in any conductive layer of the array substrate, such as the ITO layer 50, the common electrode layer, the source/drain metal layer 30, the gate layer 60, and the like. At least one of the layers.
- the impedance balance line 10 and its associated signal transmission line 20 may be formed. In different layers.
- the impedance balance line 10 in the different layers and the signal transmission line 20 to which it belongs may be electrically connected by direct contact or via holes.
- the embodiment of the present invention further provides a method for fabricating an array substrate, and the method may specifically include:
- An impedance balance line 10 is formed on the associated signal transmission line 20 of the plurality of signal transmission lines 20, and the impedance balance line 10 is electrically connected to the associated signal transmission line 20 such that the impedance difference of different data transmission channels in the line region is different. Meet the first preset condition.
- the step of forming an impedance balance line on the associated signal transmission line 20 of the plurality of signal transmission lines 20 may specifically include:
- a pattern of the signal transmission line 20 and a layer above the signal transmission line 20 are formed;
- An impedance balance line 10 pattern is formed over the signal transmission line 20.
- the implementation of this embodiment enables the impedance balancing line 10 to be electrically connected in direct contact with its associated signal transmission line 20.
- a source/drain metal layer 30 may be deposited on an existing pattern of the array substrate (for example, the gate layer 60, the gate insulating layer 70, etc.), and a signal transmission line is formed through a patterning process. 20 patterns.
- a pattern such as a passivation layer 40 is then formed on the signal transmission line 20.
- the passivation layer 40 on the signal transmission line 20 at the edge of the junction region is etched away in a Via etching process by modifying the mask structure.
- a pixel electrode ITO layer 50 pattern is then formed directly on the exposed signal transmission line 20, and the ITO layer 50 pattern is used as the impedance balance line 10 of the signal transmission line 20.
- the ITO layer 50 is electrically conductive, the presence of the ITO layer 50 pattern increases the conductive area of the corresponding signal transmission line 20.
- the principle is similar to the fact that the total resistance of the plurality of resistors in parallel is smaller than the respective sub-resistors, so that the line resistance of the signal transmission line 20 at the edge of the line region can be effectively reduced, thereby reducing the impedance value of the data transmission channel at the edge of the line region.
- the parameters such as the length of the layer 50 pattern may be determined according to the position and length of each signal transmission line 20. For example, the ffi anti-balancing line configured by the signal transmission line 20 shown in FIG. 3 can be the longest. Then, in the direction toward the center of the hub area (ie, the direction of the signal transmission line 21 in FIG. 3), the length of the impedance balance line 10 configured by each of the signal transmission lines 20 is sequentially shortened (provided that all the signal transmission lines 20 in the hub area are configured.
- the ⁇ layer 50 pattern, that is, the impedance balance line 10 is of the same quality).
- the signal transmission line 20 may not be provided with the corresponding impedance balance line 10. That is, the overall objective of the embodiment of the present invention is to reduce the impedance value of the signal transmission line 20 at the periphery of the line region, that is, the resistance, and to make the ratio of the difference of the ffi resistance between the data transmission channels corresponding to each signal transmission line 20 in the line region.
- the preset range is reached, for example, the ratio is 1 or close to 1.
- the impedance balance line formed on the ITO layer 50 can be etched into strips. Therefore, in an embodiment of the invention, the impedance balance line 10 can be specifically composed of at least one conductive line.
- the above embodiment is described by taking the signal transmission line 20 formed on the source/drain metal layer 30 (SD layer) and the impedance equalization line 10 being formed on the ITO layer 50 as an example.
- the pattern of the signal transmission line 20 may also be formed in the gate layer 60, and then the gate insulating layer 70 may be covered by etching away the signal transmission line 20, and the source/drain metal layer may be directly covered on the bare signal transmission line 20.
- a material of 30, that is, an impedance balance line 10, may be formed in the source/drain metal layer 30.
- the impedance balance line 10 is formed in one layer. Further, a pattern of the impedance balance lines 10 may be formed in a plurality of layers, and both of them are electrically connected to the signal transmission lines 20 formed in the gate layer 60 by direct contact.
- the signal transmission line 20 is formed in the gate layer 60, and the first impedance balance line is formed on the source/drain metal layer 30 as an example.
- the passivation layer 40 on the first impedance balance line is etched away, and then the second impedance balance line formed on the ITO layer 50 is directly covered on the first impedance balance line.
- the bundle is combined with the first impedance balance line and the second impedance balance line to form an impedance balance line 10 corresponding to the signal transmission line 20.
- the impedance balance line 10 in this embodiment can be composed of different conductive lines formed in a plurality of layers, the conductive area of the signal transmission line 20 can be significantly increased, and the impedance of the data transmission channel corresponding to the signal transmission line 20 can be significantly reduced. Value, such as reducing the impedance value by more than 50%.
- the step of forming an impedance balance line on the associated signal transmission line 20 in the transmission line 20 may further include:
- an implementation of the ffi flattening is formed to electrically connect the impedance balancing line 10 with its associated signal transmission line 20 through the via. .
- the column substrate according to the embodiment of the present invention is an example of a bottom-arc array substrate. Give an example for explanation.
- the signal transmission line 20 and the impedance balance line 10 formed in the plurality of layers may be connected by the uppermost conductive layer of the array substrate.
- the prior art and the process can be used to form the gate line (gata line) and the common electrode line (com line) in the gate layer 60.
- a reserved gate layer 60 metal line is formed as the impedance balance line 10.
- the signal transmission line 20 is formed in the drain layer 60, when a source/drain metal line (i.e., a data line) is formed in the source/drain metal layer 30, at a position where the signal transmission line 20 (formed in the gate layer 60) is located, The source and drain metal lines are also reserved as the impedance balance line 10.
- via holes are formed in the preset position and in the preset layer.
- the uppermost layer of the column substrate i.e., the last formed conductive layer, such as the ITO layer 50 pattern, is electrically connected between the two or more conductive layers (including the impedance balancing line 10 and the signal transmission line 20) through the via holes.
- the uppermost conductive layer itself may also be a part of the impedance balance line 10.
- the feature of this solution is that the existing process method can be used to smoothly reduce the impedance value of the data transmission channel without adding a mask.
- the process of using the uppermost conductive layer of the array substrate to connect the signal transmission line 20 and the impedance balance line 10 formed in the plurality of layers is described in detail for the different via etching process schemes.
- the 4mask array substrate fabrication process is taken as an example.
- the via hole 90 (specifically, as shown in FIG. 5) is not retained in the embodiment of the present invention.
- the SDT etch (Etch) process the source/drain metal layer 30 and the active layer 80 at the via 90 are etched away.
- a via 90 is formed at this position.
- the passivation layer 40 and the gate insulating layer 70 at the position of the via 90 can be etched away by a common via etching process.
- the electrical connection between the signal transmission line 20 and the impedance equalization line 10 formed in the source/drain metal layer 30 and the metal layer 60 layer metal layer can be realized by deposition of the subsequent germanium layer 50 metal material.
- the material of the passivation layer 40 on the sidewall of the via 90 needs to be etched to ensure that the ITO layer deposited on the sidewall can be utilized after depositing the ITO layer 50.
- the metal material is 50, so that the signal transmission line 20 and the impedance balance line 10 in different layers are connected through the ITO layer 50.
- the data transfer channel at this time includes three layers of conductive layers.
- the signal transmission line 20 formed in the source/drain metal layer 30 and the impedance balance line 10 formed in the gate layer 60 and the ITO layer 50, or the signal transmission line 20 formed in the gate layer 60 and the source/drain metal layer 30 neutralizes the impedance balance line of the ITO layer 50.
- the pattern of the ITO layer 50 of the top layer is not retained, then only the material of the ITO layer 50 exists on the sidewall of the via 90, and the material of the ITO layer 50 exists only to turn on the signal transmission line 20 and the impedance.
- the balance line 10 is formed.
- the data transmission channel at this time includes two conductive layers, that is, the signal transmission line 20 formed in the source/drain metal layer 30 and the impedance balance line 10 formed in the gate layer 60, or The signal transmission line 20 formed in the gate layer 60 and the impedance balance line 10 formed in the source/drain metal layer 30.
- the column substrate structure produced by this scheme can be as shown in FIG.
- the drain electrode and the pixel electrode located in the pixel region may be in the normal via etching process.
- a via hole 91 (not shown in the drawing, reference numeral 91 is used to identify that the via hole and the via hole 90 are different via holes) is subjected to a ffi half exposure technique, and the via hole 90 according to the embodiment of the present invention is provided. Adopt full exposure technology. Thereby, when the via hole 90 is turned on to the gate layer 60, the via hole 91 connecting the drain electrode and the pixel electrode position can be smoothly formed in a mask.
- etching process sequence is:
- Dry etching ashing process etches off the PR glue on the via 91;
- the deposited germanium layer 50 is used to connect the signal transmission line 20 and the impedance balance line 10 respectively in each layer, and the ITO layer 50 may be considered to form a three-layer conductive structure, or only retained.
- the ITO layer 50 of the hole position is made of a material to form a two-layer conductive structure.
- the ITO layer 50 is connected to the drain electrode at the position of the via 91, and the via structure of the ITO layer 50 connecting the signal transmission line 20 and the impedance balance line 10 is formed at the position of the via 90.
- the conventional via etching only needs to etch away the passivation layer 40 connecting the drain electrode and the pixel electrode in the pixel region, and the passivation layer 40 and the gate insulating layer 70 in the line region. Therefore, in the embodiment of the present invention, The gate insulating layer 70 in the etched via 90 is fully achievable both in principle and in practice.
- the via etch scheme provided by the scheme can directly realize the simultaneous etching of 3 ⁇ 4 vias in a mask.
- the array substrate formed by the above-described via etching process can also be as shown in FIG.
- a plurality of via etching processes may be employed to effect electrical connection between the signal transmission line 20 and the impedance balancing line 10 in different layers.
- a mask process is added after the active layer 80 is deposited, and the connection gate layer 60 and the source/drain metal layer 30 are formed in the active layer 80 and the gate insulating layer 70. Hole 90. Then, a pattern of the source/drain metal layer 30 (which may be the signal transmission line 20 or the impedance balance line 10) is formed by a process. Since the sidewalls of the via 90 are covered with the quality of the source/drain metal layer 30, the gate layer 60 and Electrical connection is made between the source and drain metal layers 30.
- the passivation layer 40 is covered on the source/drain metal layer 30, and again through a mask process, a via 91 is formed at the position of the via 90 in the passivation layer 40.
- the ITO layer 50 is covered at the position of the via 91 and the passivation layer 40, thereby electrically connecting the gate layer 60, the source/drain metal layer 30, and the ITO layer 50, thereby forming a three-layer conductive structure.
- the technical solutions shown in FIG. 4 and FIG. 5 may be combined, and the ffi may be the array substrate according to the embodiment of the present invention.
- the passivation layer 40 and the portion of the gate insulating layer 70 located at the position of the signal transmission line 20 are etched to form a strip-shaped shallow channel.
- the ITO layer 50 is then deposited on the trench, which also enables electrical connection between the signal transmission line 20 and the impedance balancing line 10 in different layers. This has the advantage that the ITO layer 50 film can directly contact the metal of the source/drain metal layer 30 to improve the reliability and yield of the process.
- the embodiment of the present invention further provides a display device, and the device may specifically include the column substrate provided by the embodiment of the present invention.
- the display device may specifically be a display device such as a liquid crystal panel, a liquid crystal television, a liquid crystal display, an OLED (Organic Light Emitting Diode) panel, an OLED display, a plasma display, or an electronic paper.
- a display device such as a liquid crystal panel, a liquid crystal television, a liquid crystal display, an OLED (Organic Light Emitting Diode) panel, an OLED display, a plasma display, or an electronic paper.
- the wiring region of the array substrate includes: transmitting signals between the driving chip and the display region of the array substrate.
- the difference in impedance of different data transmission channels in the hub region is made to comply with a first preset condition. Therefore, the resistance ratio between the signal transmission channels corresponding to each signal transmission line in the port area can be realized within a preset range without increasing the port area, so as to reduce the signal delay.
- the implementation of the technical solution provided by the embodiment of the present invention can reduce the width of the signal transmission line, so that more signal transmission lines can be set in one port area, and the port area set in the display panel can be reduced, which is advantageous for the narrow border.
- a driving circuit can drive as many signal transmission lines as possible, reduce the number of driving circuits, and reduce the production cost of the display panel.
- the technical solution provided by the embodiment of the present invention can also be applied together with the existing fold line design, so that the purpose of making the difference of the impedance between the data transmission channels conform to the preset condition can also be achieved.
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US14/429,618 US10127855B2 (en) | 2013-10-31 | 2014-06-09 | Array substrate, its manufacturing method, and display device |
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CN201310530006.5A CN103560134B (zh) | 2013-10-31 | 2013-10-31 | 一种阵列基板及其制作方法、显示装置 |
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CN113763818B (zh) * | 2021-09-07 | 2023-06-02 | 武汉华星光电技术有限公司 | 显示装置 |
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US20160063912A1 (en) | 2016-03-03 |
CN103560134A (zh) | 2014-02-05 |
US10127855B2 (en) | 2018-11-13 |
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