CN101060130A - Active organic light emitting diode display device and manufacturing method thereof - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及一种有源式有机发光二极管显示装置(Active MatrixOrganic Light Emitting Diode Display Device,AMOLED displaydevice)的制造方法及其结构,且特别是涉及一种利用半透光光刻掩膜(half-tone mask)制造彩色滤光层(color filter layer)的有源式有机发光二极管显示装置的制造方法及其结构。The present invention relates to a kind of manufacturing method and structure of Active Matrix Organic Light Emitting Diode Display Device (Active Matrix Organic Light Emitting Diode Display Device, AMOLED display device), and particularly relates to a half-tone photolithographic mask (half-tone) A method for manufacturing an active organic light-emitting diode display device for manufacturing a color filter layer (color filter layer) and a structure thereof.
背景技术Background technique
有机发光二极管(Organic Light Emitting Diode,OLED)是一种可将电能转换成光能且具有高转换效率的半导体元件,常见的用途为指示灯、显示面板以及光学读写头的发光元件等。由于有机发光二极管具备无视角、工艺简易、低成本、高应答速度、使用温度范围广泛与全彩化等特性,并符合多媒体时代显示器特性的要求,近年来已成为研究的热潮。Organic Light Emitting Diode (OLED) is a semiconductor element that can convert electrical energy into light energy and has high conversion efficiency. Common uses are light-emitting elements for indicator lights, display panels, and optical read-write heads. Because organic light-emitting diodes have the characteristics of no viewing angle, simple process, low cost, high response speed, wide temperature range and full color, and meet the requirements of display characteristics in the multimedia era, they have become a research boom in recent years.
承上述,一种利用阵列基板上有彩色滤光阵列层(color filter onarray,以下称COA)的有源式有机发光二极管显示装置(ActiveMatrix Organic Light Emitting Diode)也被提出,关于其制造方法、结构等,已有许多学者提出相关的研究。图1A~图1F为公知技术中制造具有COA结构的有源式有机发光二极管显示装置的步骤流程剖面示意图。Based on the above, an Active Matrix Organic Light Emitting Diode display device (ActiveMatrix Organic Light Emitting Diode) using a color filter onarray (hereinafter referred to as COA) on the array substrate has also been proposed. Regarding its manufacturing method and structure Many scholars have put forward relevant researches. FIGS. 1A to 1F are schematic cross-sectional views of the steps of manufacturing an active organic light emitting diode display device with a COA structure in the prior art.
请参照图1A,首先,提供基板100,此基板100上已形成有元件层110。此元件层110中具有多个薄膜晶体管120(图中仅示出一个)、多条扫描线(未绘示)与多数条资料线(未绘示),而薄膜晶体管120是通过扫描线与数据线而驱动。Referring to FIG. 1A , firstly, a
请继续参照图1A,每一个薄膜晶体管120包括硅岛状物121(silicon island)、栅绝缘层122(gate-insulating layer)、栅极123(gate)、源极124a/漏极124b(source/drain)、层间介电层125(inter-layer dielectric,ILD),以及源极/漏极接触金属126(source/drain contact metal)。值得注意的是,层间介电层125具有开口125a而暴露出薄膜晶体管120的源极124a/漏极124b(source/drain)。并且,源极/漏极接触金属126会与源极124a/漏极124b电连接,并利用此源极/漏极接触金属126使薄膜晶体管120与后续形成的透明导电层150(transparent conductive layer)电连接。Please continue to refer to FIG. 1A, each
接着,请参照图1B,利用层间介电层125为缓冲层(buffer layer),进行彩色滤光阵列层(color filter array layer)的制造,也就是形成上述所说的COA结构。其经过三次利用涂布彩色光刻胶、曝光及显影的步骤,而在层间介电层125上分别形成红色滤光层130、绿色滤光层(图中未表示)与蓝色滤光层(图中未表示)。特别是,红色滤光层130、绿色滤光层与蓝色滤光层的位置是对应后续所形成的像素区162(pixel area)的位置。Next, referring to FIG. 1B , the interlayer
再来,请参照图1C,在基板100上继续形成平坦层(flat layer)140,而覆盖红色滤光层130、绿色滤光层与蓝色滤光层。接着,并图案化此平坦层140,而形成接触窗开口142,此接触窗开口142暴露出源极/漏极接触金属126。Next, referring to FIG. 1C , a
继之,请参照图1D,在平坦层140上形成透明导电层150,此透明导电层150会通过接触窗开口142与源极/漏极接触金属126电连接。Next, please refer to FIG. 1D , a transparent
再来,请参照图1E,在透明导电层150上形成像素定义层160(pixel defining layer),此像素定义层160定义出多个像素区162(pixel area)。像素定义层160是利用涂布有机光刻胶后,并对其进行曝光与显影等步骤而形成,或是利用镀上一层无机材料层后,再利用光刻与蚀刻等步骤而形成。Next, please refer to FIG. 1E , a pixel defining layer 160 (pixel defining layer) is formed on the transparent
之后,请参照图1F,在各个像素区162内形成有机发光材料层170,而完成有源式有机发光二极管显示装置200的制造。通过薄膜晶体管120的开关动作而施加电压到透明导电层150上,进而使有机发光材料层170发光。并且,有机发光材料层170所发出的光线,会再经过彩色滤光阵列层(如图中所示的红色滤光层130)而形成色光。After that, referring to FIG. 1F , an organic light emitting material layer 170 is formed in each
值得注意的是,制造具有COA结构的有源式有机发光二极管显示装置200,其在制造彩色滤光阵列层的步骤时,需要分别经过三次的涂布彩色光刻胶、曝光以及显影的步骤。另外,为了使薄膜晶体管120与透明导电层150电连接,还要再利用一道图案化工艺以在平坦层140中制造接触窗开口142。之后,还要再形成像素定义层170以定义出各个像素区162,才能在像素区162涂布有机发光材料层170,特别是,形成此像素定义层170时要再经过一道成膜与图案化的工艺。It is worth noting that to manufacture the active organic light emitting diode display device 200 with a COA structure, it needs to go through three steps of coating color photoresist, exposing and developing respectively during the step of manufacturing the color filter array layer. In addition, in order to electrically connect the
如此一来,公知具有COA结构的有源式有机发光二极管显示装置200的制造方法,在工艺步骤上将会十分复杂,并且,上述的制造方法也不易降低制造成本。As a result, the known manufacturing method of the active organic light emitting diode display device 200 having a COA structure will be very complicated in terms of process steps, and the above-mentioned manufacturing method is not easy to reduce the manufacturing cost.
发明内容Contents of the invention
有鉴于此,本发明之目的是提供一种有源式有机发光二极管显示装置的制造方法,以简化工艺并降低制造成本。In view of this, the object of the present invention is to provide a method for manufacturing an active organic light emitting diode display device, so as to simplify the process and reduce the manufacturing cost.
本发明之另一目的是提供一种有源式有机发光二极管显示装置,其利用上述有源式有机发光二极管显示装置的制造方法而制造,而能提高产能。Another object of the present invention is to provide an active organic light emitting diode display device, which is manufactured by using the above-mentioned method for manufacturing an active organic light emitting diode display device, so that the production capacity can be improved.
为达上述或是其它目的,本发明提出一种有源式有机发光二极管显示装置的制造方法,其包括下列步骤。首先,提供基板。再来,形成元件层于基板上,此元件层具有多个有源元件。接着,在元件层上形成平坦层。继之,在平坦层上形成第一彩色光刻胶层。之后,图案化第一彩色光刻胶层而形成第一彩色滤光层,并定义出第一像素区,且第一彩色滤光层具有第一开口。接着,在平坦层上形成第二彩色光刻胶层。再来,图案化第二彩色光刻胶层而形成第二彩色滤光层,并定义出第二像素区,且第二彩色滤光层具有第二开口。继之,在平坦层上形成第三彩色光刻胶层。之后,图案化第三彩色光刻胶层而形成第三彩色滤光层,并定义出第三像素区,且第三彩色滤光层具有第三开口。接着,以第一、第二与第三彩色滤光层为掩膜,移除第一、第二与第三开口下方之平坦层而形成多个接触窗开口,以暴露出部分有源元件。再来,在第一、第二与第三像素区中分别形成第一、第二与第三像素电极,且第一、第二与第三像素电极分别通过这些接触窗开口而与有源元件电连接。之后,分别在第一、第二与第三像素电极上形成第一、第二与第三有机发光材料层。To achieve the above or other objectives, the present invention provides a method for manufacturing an active organic light emitting diode display device, which includes the following steps. First, a substrate is provided. Next, an element layer is formed on the substrate, and the element layer has a plurality of active elements. Next, a planarization layer is formed on the element layer. Then, a first colored photoresist layer is formed on the flat layer. Afterwards, the first color photoresist layer is patterned to form a first color filter layer, and a first pixel area is defined, and the first color filter layer has a first opening. Next, a second colored photoresist layer is formed on the flat layer. Next, the second color photoresist layer is patterned to form a second color filter layer, and a second pixel area is defined, and the second color filter layer has a second opening. Then, a third colored photoresist layer is formed on the flat layer. After that, the third color photoresist layer is patterned to form a third color filter layer, and a third pixel area is defined, and the third color filter layer has a third opening. Then, using the first, second and third color filter layers as masks, removing the planar layer under the first, second and third openings to form a plurality of contact window openings to expose part of the active elements. Furthermore, the first, second and third pixel electrodes are respectively formed in the first, second and third pixel regions, and the first, second and third pixel electrodes are respectively connected to the active element electrodes through these contact window openings. connect. Afterwards, first, second and third organic light-emitting material layers are respectively formed on the first, second and third pixel electrodes.
在本发明之一实施例中,上述之图案化第一、第二与第三彩色光刻胶层的方法包括以半透光光刻掩膜为掩膜,分别图案化第一、第二与第三彩色光刻胶层。In one embodiment of the present invention, the above-mentioned method for patterning the first, second and third colored photoresist layers includes using a semi-transparent photolithographic mask as a mask to pattern the first, second and third colored photoresist layers respectively. The third color photoresist layer.
在本发明之一实施例中,上述第一彩色滤光层是红色滤光层,第二彩色滤光层是绿色滤光层,而第三彩色滤光层是蓝色滤光层。In one embodiment of the present invention, the first color filter layer is a red filter layer, the second color filter layer is a green filter layer, and the third color filter layer is a blue filter layer.
在本发明之一实施例中,上述第一、第二与第三有机发光材料层组成成份不同。In an embodiment of the present invention, the compositions of the above-mentioned first, second and third organic light-emitting material layers are different.
在本发明之一实施例中,上述第一、第二与第三有机发光材料层组成成份相同。In an embodiment of the present invention, the above-mentioned first, second and third organic light-emitting material layers have the same composition.
为达上述或是其它目的,本发明再提出一种有源式有机发光二极管显示装置,其包括基板、元件层、平坦层、第一、第二与第三彩色滤光层、第一、第二与第三像素电极,以及第一、第二与第三有机发光材料层。元件层设置于基板上,而元件层具有多个有源元件。平坦层设置于元件层上,此平坦层具有多个接触窗开口而分别暴露出部分上述有源元件。第一彩色滤光层设置于平坦层上,其中第一彩色滤光层具有第一像素区及第一开口,且第一开口位于部分接触窗开口的上方。第二彩色滤光层设置于平坦层上,其中第二彩色滤光层具有第二像素区及第二开口,且第二开口位于部分接触窗开口的上方。第三彩色滤光层设置于平坦层上,其中第三彩色滤光层具有第三像素区及第三开口,且第三开口位于部分接触窗开口的上方。第一、第二与第三像素电极分别设置于第一、第二与第三像素区中,且第一、第二与第三像素电极分别通过第一、第二与第三开口以及接触窗开口而与有源元件电连接。第一、第二与第三有机发光材料层,分别设置于第一、第二与第三像素电极上。To achieve the above or other objectives, the present invention further proposes an active organic light emitting diode display device, which includes a substrate, an element layer, a flat layer, a first, a second and a third color filter layer, a first, a first The second and third pixel electrodes, and the first, second and third organic luminescent material layers. The element layer is disposed on the substrate, and the element layer has a plurality of active elements. The planar layer is disposed on the element layer, and the planar layer has a plurality of contact window openings respectively exposing part of the above active elements. The first color filter layer is disposed on the flat layer, wherein the first color filter layer has a first pixel area and a first opening, and the first opening is located above a part of the contact window opening. The second color filter layer is disposed on the planar layer, wherein the second color filter layer has a second pixel area and a second opening, and the second opening is located above a portion of the contact window opening. The third color filter layer is disposed on the planar layer, wherein the third color filter layer has a third pixel area and a third opening, and the third opening is located above a part of the opening of the contact window. The first, second and third pixel electrodes are respectively arranged in the first, second and third pixel regions, and the first, second and third pixel electrodes respectively pass through the first, second and third openings and the contact window The opening is electrically connected to the active element. The first, second and third organic luminescent material layers are respectively arranged on the first, second and third pixel electrodes.
在本发明之一实施例中,上述第一彩色滤光层是红色滤光层,第二彩色滤光层是绿色滤光层,而第三彩色滤光层是蓝色滤光层。In one embodiment of the present invention, the first color filter layer is a red filter layer, the second color filter layer is a green filter layer, and the third color filter layer is a blue filter layer.
在本发明之一实施例中,上述第一、第二与第三有机发光材料层组成成份不同。In an embodiment of the present invention, the compositions of the above-mentioned first, second and third organic light-emitting material layers are different.
在本发明之一实施例中,上述第一、第二与第三有机发光材料层组成成份相同。In an embodiment of the present invention, the above-mentioned first, second and third organic light-emitting material layers have the same composition.
在本发明之一实施例中,上述有源元件包括薄膜晶体管,其中每一个薄膜晶体管包括硅岛状物、栅绝缘层、栅极、源极/漏极、层间介电层,以及源极/漏极接触金属。硅岛状物设置于基板上。栅绝缘层覆盖硅岛状物。栅极设置于硅岛状物上方的栅绝缘层上。源极/漏极设置于栅极两侧下方的硅岛状物中,而源极/漏极之间是通道区。层间介电层覆盖栅极,且层间介电层暴露出部分源极/漏极。源极/漏极接触金属分别与源极/漏极电连接。In one embodiment of the present invention, the above-mentioned active element includes a thin film transistor, wherein each thin film transistor includes a silicon island, a gate insulating layer, a gate, a source/drain, an interlayer dielectric layer, and a source /drain contact metal. The silicon islands are disposed on the substrate. A gate insulating layer covers the silicon islands. The gate is disposed on the gate insulating layer above the silicon island. The source/drain are arranged in the silicon islands below the two sides of the gate, and the channel region is between the source/drain. The interlayer dielectric layer covers the gate, and part of the source/drain is exposed by the interlayer dielectric layer. The source/drain contact metals are electrically connected to the source/drain, respectively.
本发明因采用半透光光刻掩膜图案化第一、第二与第三彩色光刻胶层,而使形成的第一、第二与第三彩色滤光层可作为像素定义层,并可作为用以制造接触窗开口的蚀刻掩膜。所以,本发明的制造方法可以减少像素定义层以及用以制造接触窗开口的蚀刻掩膜的制造步骤,进而简化工艺并降低成本。In the present invention, the first, second and third color photoresist layers are patterned by using a semi-transparent photolithographic mask, so that the formed first, second and third color filter layers can be used as pixel definition layers, and Can be used as an etch mask to create contact openings. Therefore, the manufacturing method of the present invention can reduce the manufacturing steps of the pixel definition layer and the etching mask for manufacturing the contact window opening, thereby simplifying the process and reducing the cost.
为让本发明之上述和其它目的、特征和优点能更明显易懂,下文特举较佳实施例,并配合附图,作详细说明如下。In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail with accompanying drawings.
附图说明Description of drawings
图1A~图1F为公知技术中制造具有COA结构的有源式有机发光二极管显示装置的步骤流程剖面示意图。FIGS. 1A to 1F are schematic cross-sectional views of the steps of manufacturing an active organic light emitting diode display device with a COA structure in the prior art.
图2A~图2H为本发明之较佳实施例中一种有源式有机发光二极管显示装置的制造方法的步骤流程剖面示意图。2A to 2H are cross-sectional schematic diagrams showing the steps of a method for manufacturing an active organic light emitting diode display device in a preferred embodiment of the present invention.
图3为本发明较佳实施例中之一种有源式有机发光二极管显示装置的剖面示意图。FIG. 3 is a schematic cross-sectional view of an active organic light emitting diode display device in a preferred embodiment of the present invention.
主要元件标记说明Description of main component marking
100、300、410:基板100, 300, 410: Substrate
110、310、420:元件层110, 310, 420: component layer
120:薄膜晶体管120: thin film transistor
121、471:硅岛状物121, 471: Silicon islands
122、472:栅绝缘层122, 472: gate insulating layer
123、473:栅极123, 473: grid
124a、474a:源极124a, 474a: source
124b、474b:漏极124b, 474b: drain
125、475:层间介电层125, 475: interlayer dielectric layer
126、476:源极/漏极接触金属126, 476: Source/drain contact metal
130:红色滤光层130: Red filter layer
140、330、430:平坦层140, 330, 430: flat layer
142、330a、430a:接触窗开口142, 330a, 430a: contact window openings
150:透明导电层150: transparent conductive layer
160:像素定义层160: Pixel definition layer
170:有机发光材料层170: organic luminescent material layer
200、400:有源式有机发光二极管显示装置200, 400: active organic light emitting diode display device
320、470:有源元件320, 470: active components
340:第一彩色光刻胶层340: first color photoresist layer
340’、442:第一彩色滤光层340', 442: the first color filter layer
340’a、442a:第一像素区340'a, 442a: first pixel area
340’b、442b:第一开口340'b, 442b: first opening
350:半透光光刻掩膜350: semi-transparent photolithography mask
352:曝光区352: Exposure Area
354:半透光区354: semi-transparent area
356:遮光区356: shading area
360、444:第二彩色滤光层360, 444: Second color filter layer
360a、444a:第二像素区360a, 444a: the second pixel area
360b、444b:第二开口360b, 444b: second opening
370、446:第三彩色滤光层370, 446: the third color filter layer
370a、446a:第三像素区370a, 446a: the third pixel area
370b、446b:第三开口370b, 446b: third opening
380a、452:第一像素电极380a, 452: first pixel electrodes
380b、454:第二像素电极380b, 454: the second pixel electrode
380c、456:第三像素电极380c, 456: the third pixel electrode
392、462:第一有机发光材料层392, 462: the first organic light-emitting material layer
394、464:第二有机发光材料层394, 464: second organic light-emitting material layer
396、466:第三有机发光材料层396, 466: the third organic light-emitting material layer
480:浅掺杂漏极区480: shallowly doped drain region
具体实施方式Detailed ways
图2A~图2H为本发明之较佳实施例中一种有源式有机发光二极管显示装置的制造方法的步骤流程剖面示意图。请同时参照图2A~图2H。2A to 2H are cross-sectional schematic diagrams showing the steps of a method for manufacturing an active organic light emitting diode display device in a preferred embodiment of the present invention. Please refer to FIG. 2A to FIG. 2H at the same time.
首先,提供基板300,如图2A所示。此基板300可以是玻璃基板、石英基板或是可挠曲的基板。请继续参照图2A,再来,形成元件层310于基板300上,此元件层310具有多个有源元件320(图中仅示出一个)。在本发明之一实施例中,有源元件320例如是薄膜晶体管。并且,元件层310具有多条扫描线(图中未表示)与多条数据线(图中未表示),有源元件320是通过扫描线与数据线而驱动。形成元件层310的方式例如是利用一般的半导体工艺,在此不予以详述。First, a
接着,在元件层310上形成平坦层330,如图2B所示。在一实施例中,形成此平坦层330的方法例如是化学气相沉积法(chemicalvapor deposition,CVD),而平坦层330的材料例如是氧化硅、氮化硅或氮氧化硅。Next, a
继之,在平坦层330上形成第一彩色光刻胶层340,如图2C所示。在一实施例中,形成此第一彩色光刻胶层340的方法包括旋转涂布法(spin coating)或蒸镀法(evaporation),而第一彩色光刻胶层340的材料例如是有机高分子材料。Next, a first
之后,图案化第一彩色光刻胶层340而形成第一彩色滤光层340’,并定义出第一像素区340’a,且第一彩色滤光层340’具有第一开口340’b,如图2D所示。在一实施例中,图案化第一彩色光刻胶层340的方法是以半透光光刻掩膜350为掩膜,而图案化第一彩色光刻胶层340。After that, the first
请继续参照图2D,此半透光光刻掩膜350例如是具有曝光区352、半透光区354与遮光区356。并且,第一彩色光刻胶层340可以是负型光刻胶(negative type photoresist)或正型光刻胶(positivetype photoresist)。当第一彩色光刻胶层340为负型光刻胶时,利用此半透光光刻掩膜350对第一彩色光刻胶层340进行光刻工艺(photolithography)后,曝光区352所对应的第一彩色光刻胶层340会留下;半透光区354所对应的第一彩色光刻胶层340会部分移除,并形成第一像素区340’a;遮光区356所对应的第一彩色光刻胶层340会完全移除,而形成第一开口340b’,因此,而得到第一彩色滤光层340’。当然,也可以利用两个以上的不同曝光能量的光刻掩膜,对于第一彩色光刻胶层340进行曝光,而形成如图2D的第一彩色滤光层340’。Please continue to refer to FIG. 2D , the semi-transparent photolithographic mask 350 has, for example, an exposure area 352 , a semi-transparent area 354 and a light-shielding area 356 . Also, the first
接着,重复图2C与图2D的步骤,在平坦层330上形成第二彩色光刻胶层(图中未表示),并利用半透光光刻掩膜350图案化第二彩色光刻胶层而形成第二彩色滤光层360;以及,在平坦层330上再继续形成第三彩色光刻胶层(图中未表示),并再利用半透光光刻掩膜350图案化第三彩色光刻胶层而形成第三彩色滤光层370,最后可得到如图2E所示的COA结构。同样地,在第二彩色滤光层360定义出第二像素区360a,且第二彩色滤光层360具有第二开口360b,而在第三彩色滤光层370定义出第三像素区370a,且第三彩色滤光层370具有第三开口370b。在一实施例中,第一彩色滤光层340’可以是红色滤光层,第二彩色滤光层360可以是绿色滤光层,而第三彩色滤光层370可以是蓝色滤光层,其共同构成彩色滤光阵列层(colorfilter array layer)。Next, repeat the steps of FIG. 2C and FIG. 2D to form a second color photoresist layer (not shown in the figure) on the
值得注意的是,利用半透光光刻掩膜350配合上光刻胶、曝光、显影等步骤所形成的第一、第二与第三彩色滤光层340’、360、370,其不但具有滤光的功能外,其还可以作为像素定义层而定义出多个第一、第二与第三像素区340’a、360a、370a。It is worth noting that the first, second and third color filter layers 340 ′, 360 , and 370 formed by using the semi-transparent photolithographic mask 350 in conjunction with photoresist, exposure, and development steps not only have In addition to the function of light filtering, it can also be used as a pixel definition layer to define a plurality of first, second and third pixel areas 340'a, 360a, 370a.
接着,以第一、第二与第三彩色滤光层340’、360、370为掩膜,移除第一、第二与第三开口340’b、360b、370b下方的平坦层330而形成多个接触窗开口330a,这些接触窗开口330a暴露出部分有源元件320,如图2F所示。在一实施例中,移除平坦层330的方法可以是干式蚀刻法或是湿式蚀刻法。Next, using the first, second and third color filter layers 340', 360, 370 as masks, removing the
值得注意的是,由于第一、第二与第三彩色滤光层340’、360、370具有第一、第二与第三开口340’b、360b、370b,所以其可以作为制造接触窗开口330a的蚀刻掩膜。结果是,与公知技术中图1C的步骤相比而言,本发明可减少一道用以制造接触窗开口330a的图案化光刻胶层的制造,所以本发明的制造步骤较为简单。It should be noted that since the first, second and third color filter layers 340', 360, 370 have first, second and third openings 340'b, 360b, 370b, they can be used as manufacturing contact window openings. 330a of the etch mask. As a result, compared with the step of FIG. 1C in the prior art, the present invention can reduce the fabrication of one patterned photoresist layer for forming the
再来,在第一、第二与第三像素区340’a、360a、370a中分别形成第一、第二与第三像素电极380a、380b、380c,且第一、第二与第三像素电极380a、380b、380c分别通过接触窗开口330a与有源元件320电连接,如图2G所示。在一实施例中,形成第一、第二与第三像素电极380a、380b、380c的方法例如是先利用溅镀法(sputtering)在基板300上形成一层透明导电层(图中未表示),此透明导电层的材料例如是铟锡氧化物(Indium Tin Oxide,ITO)或是铟锌氧化物(Indium Zinc Oxide,IZO)。接着,再图案化透明导电层而形成第一、第二与第三像素电极380a、380b、380c。Next, first, second and
之后,分别在第一、第二与第三像素电极380a、380b、380c上形成第一、第二与第三有机发光材料层392、394、396,如图2H所示。在一实施例中,形成第一、第二与第三有机发光材料层392、394、396的方法可以是蒸镀法(evaporation)。After that, first, second and third organic light-emitting material layers 392, 394, 396 are formed on the first, second and
请参照图2H,值得注意的是,第一、第二与第三有机发光材料层392、394、396的组成成份不相同,即颜色可以是不同的。并且第一、第二与第三有机发光材料层392、394、396可以是对应第一、第二与第三彩色滤光层340’、360、370的颜色而设置。在一实施例中,第一有机发光材料层392是红色有机发光材料层、第二有机发光材料层394是绿色有机发光材料层,且第三有机发光材料层396是蓝色有机发光材料层,如此一来,将可以达到较佳的色饱和度(colorsaturation)。Referring to FIG. 2H , it is worth noting that the compositions of the first, second and third organic light-emitting material layers 392 , 394 , and 396 are different, that is, the colors may be different. And the first, second and third organic luminescent material layers 392, 394, 396 may be arranged corresponding to the colors of the first, second and third color filter layers 340', 360, 370. In one embodiment, the first organic light emitting
此外,在另一实施例中,第一、第二与第三有机发光材料层392、394、396的组成成份相同,即颜色可以是相同的,第一、第二与第三有机发光材料层392、394、396可以都是白光有机发光材料层,或是其它颜色的有机发光材料层。如此一来,将可以简化工艺并降低制造成本。In addition, in another embodiment, the composition of the first, second and third organic luminescent material layers 392, 394, 396 is the same, that is, the colors may be the same, and the first, second and third organic luminescent material layers 392 , 394 , and 396 may all be white organic luminescent material layers, or organic luminescent material layers of other colors. In this way, the process can be simplified and the manufacturing cost can be reduced.
综上所述,由于使用了半透光光刻掩膜以图案化第一、第二与第三彩色光刻胶层,所以,使形成的第一、第二与第三彩色滤光层可作为像素定义层,并可作为用以制造接触窗开口的蚀刻掩膜。如此一来,与公知技术相比而言,本发明可以减少像素定义层以及用以制造接触窗开口的蚀刻掩膜的制造步骤,进而简化工艺并降低成本。In summary, since the semi-transparent photolithography mask is used to pattern the first, second and third color photoresist layers, the formed first, second and third color filter layers can be As a pixel definition layer and as an etch mask for making contact openings. In this way, compared with the prior art, the present invention can reduce the manufacturing steps of the pixel definition layer and the etching mask used to manufacture the contact window opening, thereby simplifying the process and reducing the cost.
图3为本发明较佳实施例中之一种有源式有机发光二极管显示装置的剖面示意图。此有源式有机发光二极管显示装置400包括基板410、元件层420、平坦层430、第一、第二与第三彩色滤光层442、444、446、第一、第二与第三像素电极452、454、456,以及第一、第二与第三有机发光材料层462、464、466。FIG. 3 is a schematic cross-sectional view of an active organic light emitting diode display device in a preferred embodiment of the present invention. The active OLED display device 400 includes a substrate 410, an element layer 420, a flat layer 430, first, second and third color filter layers 442, 444, 446, first, second and third pixel electrodes 452, 454, 456, and first, second and third organic light-emitting material layers 462, 464, 466.
请继续参照图3,元件层420设置于基板410上,而元件层420具有多个有源元件470。在一实施例中,元件层420可以还包括多条扫描线(图中未表示)以及多条数据线(图中未表示),而有源元件470是通过扫描线与数据线而驱动。另外,有源元件470可以是薄膜晶体管。在一实施例中,每一薄膜晶体管可以包括硅岛状物471、栅绝缘层472、栅极473、源极474a/漏极474b、层间介电层475,以及源极/漏极接触金属476。其中,硅岛状物471设置于基板410上。栅绝缘层472覆盖硅岛状物471。栅极473设置于硅岛状物471上方的栅绝缘层472上。源极474a/漏极474b设置于栅极473两侧下方的硅岛状物471中,而源极474a/漏极474b之间是通道区474c。层间介电层475覆盖栅极473,且层间介电层475暴露出部分源极474a/漏极474b。源极/漏极接触金属476分别与源极474a/漏极474b电连接。此外,通道区474c与源极474a/漏极474b之间可以更具有浅掺杂漏极区480(lightly doped drain,LDD)。Please continue to refer to FIG. 3 , the device layer 420 is disposed on the substrate 410 , and the device layer 420 has a plurality of active devices 470 . In an embodiment, the device layer 420 may further include a plurality of scan lines (not shown in the figure) and a plurality of data lines (not shown in the figure), and the active device 470 is driven by the scan lines and the data lines. In addition, the active element 470 may be a thin film transistor. In one embodiment, each TFT may include a silicon island 471, a gate insulating layer 472, a gate 473, a source 474a/drain 474b, an interlayer dielectric 475, and a source/drain contact metal 476. Wherein, the silicon island 471 is disposed on the substrate 410 . The gate insulating layer 472 covers the silicon island 471 . The gate 473 is disposed on the gate insulating layer 472 above the silicon island 471 . The source 474a/drain 474b are disposed in the silicon island 471 below the two sides of the gate 473, and the channel region 474c is between the source 474a/drain 474b. The interlayer dielectric layer 475 covers the gate 473 , and the interlayer dielectric layer 475 exposes a part of the source electrode 474a/drain electrode 474b. The source/drain contact metal 476 is electrically connected to the source 474a/drain 474b, respectively. In addition, there may be a lightly doped drain region 480 (lightly doped drain, LDD) between the channel region 474c and the source 474a/drain 474b.
而平坦层430设置于元件层420上,此平坦层430具有多个接触窗开口430a而分别暴露出部分有源元件470。在一实施例中,平坦层430的材质可以是氧化硅、氮化硅或是氮氧化硅。The planar layer 430 is disposed on the device layer 420 , and the planar layer 430 has a plurality of contact window openings 430 a respectively exposing a part of the active device 470 . In an embodiment, the material of the flat layer 430 may be silicon oxide, silicon nitride or silicon oxynitride.
第一彩色滤光层442设置于平坦层430上,其中第一彩色滤光层442具有第一像素区442a及第一开口442b,且第一开口442b位于部分接触窗开口430a的上方。第二彩色滤光层444设置于平坦层430上,其中第二彩色滤光层444具有第二像素区444a及第二开口444b,且第二开口444b位于部分接触窗开口430a的上方。第三彩色滤光层446设置于平坦层430上,其中第三彩色滤光层446具有第三像素区446a及第三开口446b,且第三开口446b位于部分接触窗开口430a的上方。The first color filter layer 442 is disposed on the planar layer 430 , wherein the first color filter layer 442 has a first pixel region 442 a and a first opening 442 b, and the first opening 442 b is located above a portion of the contact window opening 430 a. The second color filter layer 444 is disposed on the planar layer 430 , wherein the second color filter layer 444 has a second pixel region 444 a and a second opening 444 b, and the second opening 444 b is located above a portion of the contact window opening 430 a. The third color filter layer 446 is disposed on the flat layer 430 , wherein the third color filter layer 446 has a third pixel region 446 a and a third opening 446 b, and the third opening 446 b is located above a part of the contact window opening 430 a.
在一实施例中,第一彩色滤光层442是红色滤光层,第二彩色滤光层444是绿色滤光层,而第三彩色滤光层446是蓝色滤光层,值得注意的是,第一、第二与第三彩色滤光层442、444、446构成彩色滤光阵列层,其除了有滤光的功能外,还具有像素定义层的作用,而可以定义出多个第一、第二与第三像素区442a、444a、446a。并且,此彩色滤光阵列层还可以用作制造接触窗开口430a的蚀刻掩膜。In one embodiment, the first color filter layer 442 is a red filter layer, the second color filter layer 444 is a green filter layer, and the third color filter layer 446 is a blue filter layer. It should be noted that Yes, the first, second and third color filter layers 442, 444, 446 form a color filter array layer, which not only has the function of filtering, but also functions as a pixel definition layer, and can define a plurality of color filter array layers. 1. The second and third pixel areas 442a, 444a, 446a. Also, the color filter array layer can also be used as an etching mask for forming the contact window opening 430a.
请继续参照图3,第一、第二与第三像素电极452、454、456分别设置于第一、第二与第三像素区442a、444a、446a中,且第一、第二与第三像素电极452、454、456分别通过第一、第二与第三开口442b、444b、446b以及接触窗开口430a而与有源元件470电连接。在一实施例中,第一、第二与第三像素电极452、454、456的材质可以是铟锡氧化物或铟锌氧化物。Please continue to refer to FIG. 3, the first, second and third pixel electrodes 452, 454, 456 are respectively disposed in the first, second and third pixel regions 442a, 444a, 446a, and the first, second and third The pixel electrodes 452, 454, 456 are electrically connected to the active element 470 through the first, second and third openings 442b, 444b, 446b and the contact opening 430a, respectively. In one embodiment, the material of the first, second and third pixel electrodes 452 , 454 , 456 may be indium tin oxide or indium zinc oxide.
而第一、第二与第三有机发光材料层462、464、466,分别设置于第一、第二与第三像素电极452、454、456上。在一实施例中,第一、第二与第三有机发光材料层462、464、466的组成成份不同,即颜色可以是不同的。例如,第一有机发光材料层462是红色有机发光材料层、第二有机发光材料层464是绿色有机发光材料层,且第三有机发光材料层466是蓝色有机发光材料层。如此一来,将可以得到较佳的色饱和度。The first, second and third organic light-emitting material layers 462 , 464 and 466 are respectively disposed on the first, second and third pixel electrodes 452 , 454 and 456 . In one embodiment, the compositions of the first, second and third organic light-emitting material layers 462 , 464 , 466 are different, that is, the colors may be different. For example, the first organic light emitting material layer 462 is a red organic light emitting material layer, the second organic light emitting material layer 464 is a green organic light emitting material layer, and the third organic light emitting material layer 466 is a blue organic light emitting material layer. In this way, better color saturation can be obtained.
在另一实施例中,第一、第二与第三有机发光材料层462、464、466的组成成份相同,即颜色可以是相同的。例如,第一、第二与第三有机发光材料层462、464、466均是白光有机发光材料层。如此一来,将可全面蒸镀相同颜色的白光有机发光材料层,进而降低制造成本。In another embodiment, the composition of the first, second and third organic light-emitting material layers 462 , 464 , 466 is the same, that is, the colors may be the same. For example, the first, second and third organic light emitting material layers 462 , 464 , 466 are all white light organic light emitting material layers. In this way, the white light organic light-emitting material layer of the same color can be vapor-deposited on the entire surface, thereby reducing the manufacturing cost.
综上所述,本发明之有源式有机发光二极管显示装置的制造方法及其结构具有下列优点:To sum up, the manufacturing method and structure of the active organic light emitting diode display device of the present invention have the following advantages:
(1)本发明可以减少像素定义层的制造步骤,以及用以制造接触窗开口的蚀刻掩膜的制造步骤。所以,本发明的工艺较为简单,并可降低制造成本。(1) The present invention can reduce the manufacturing steps of the pixel definition layer and the manufacturing steps of the etching mask used to make the contact window opening. Therefore, the process of the present invention is relatively simple, and the manufacturing cost can be reduced.
(2)利用不同颜色的有机发光材料层与彩色滤光层的配合,可以提高本发明的色饱和度。(2) The color saturation of the present invention can be improved by using the combination of organic luminescent material layers of different colors and the color filter layer.
(3)本发明也可仅利用相同颜色的有机发光材料层,进而降低制造成本。(3) The present invention can also only use organic luminescent material layers of the same color, thereby reducing the manufacturing cost.
虽然本发明已以较佳实施例披露如上,然其并非用以限定本发明,任何所属技术领域的技术人员,在不脱离本发明之精神和范围内,当可作些许之更动与改进,因此本发明之保护范围当视权利要求所界定者为准。Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.
Claims (11)
Priority Applications (1)
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