WO2019071751A1 - Tft基板及其制作方法与oled面板的制作方法 - Google Patents
Tft基板及其制作方法与oled面板的制作方法 Download PDFInfo
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- WO2019071751A1 WO2019071751A1 PCT/CN2017/112971 CN2017112971W WO2019071751A1 WO 2019071751 A1 WO2019071751 A1 WO 2019071751A1 CN 2017112971 W CN2017112971 W CN 2017112971W WO 2019071751 A1 WO2019071751 A1 WO 2019071751A1
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- 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
- H01L27/1222—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 crystalline structure of the active layer
- H01L27/1225—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 crystalline structure of the active layer with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
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- H01L29/78618—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/78633—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device with a light shield
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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- H10K59/124—Insulating layers formed between TFT elements and OLED elements
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- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L2021/775—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate comprising a plurality of TFTs on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
Definitions
- the present invention relates to the field of display technologies, and in particular, to a TFT substrate, a method for fabricating the same, and a method for fabricating the OLED panel.
- the top gate self-aligned oxide semiconductor TFT is a common type of TFT in an OLED panel.
- the material of the interlayer insulating layer is usually selected from silicon nitride (SiN x ) and silicon oxide (SiO x ).
- the step S2 includes:
- the material of the first interlayer insulating layer comprises silicon oxynitride, and the material of the second interlayer insulating layer comprises silicon oxide;
- the active layer includes a channel region corresponding to a lower portion of the gate insulating layer and is respectively located in the channel region a source contact region and a drain contact region on both sides, wherein the material of the source contact region and the drain contact region is a conductive metal oxide semiconductor material, and the material of the channel region is metal oxide for maintaining semiconductor characteristics Semiconductor material
- the thickness of the first interlayer insulating layer is smaller than the thickness of the second interlayer insulating layer.
- the invention also provides a method for manufacturing an OLED panel, comprising the following steps:
- Step S20 forming a passivation layer covering the source and the drain on the second interlayer insulating layer of the TFT substrate, and etching a first via hole corresponding to the source electrode on the passivation layer;
- Step S30 forming an OLED anode on the flat layer, the OLED anode contacting the source via the third via hole;
- Step S50 forming an organic light-emitting layer on the anode of the OLED in the opening;
- Step S60 forming a cathode on the pixel defining layer and the organic light emitting layer in the opening.
- the TFT substrate of the present invention is obtained by the above-mentioned TFT substrate fabrication method, and the performance of the gate and the active layer is stable, and the TFT device has strong working stability.
- the method for fabricating the OLED panel of the present invention uses the above-mentioned method for fabricating a TFT substrate to fabricate a TFT substrate, which can ensure a stable working stability of the TFT device, thereby ensuring good luminescent stability of the OLED panel.
- FIG. 8 are schematic diagrams showing the step S2 of the method for fabricating the TFT substrate of the present invention.
- FIG. 11 is a micrograph of the second interlayer insulating layer after the second interlayer insulating layer is formed in the method for fabricating the TFT substrate of the present invention
- FIG. 13 is a flow chart of a method of fabricating an OLED panel of the present invention.
- FIG. 14 is a schematic diagram of steps S20 to S60 of the method for fabricating an OLED panel of the present invention and a schematic structural view of the OLED panel of the present invention.
- the thickness of the buffer layer 30 is The material of the buffer layer 30 includes silicon oxide (SiO x ).
- the gate insulating layer 50 is etched by using the photoresist layer 52 and the gate electrode 60 as a barrier layer, and only the portion corresponding to the underside of the gate electrode 60 is left, and the remaining portions are etched and removed.
- the gate insulating layer 50 is located on the active layer 40 and is vertically aligned with the gate 60.
- the gate 60 and the gate insulating layer 50 define a channel region on the active layer 40 corresponding to the underlying gate insulating layer 50. 41 and a source contact region 42 and a drain contact region 43 respectively located on both sides of the channel region 41;
- the photoresist layer 52, the gate electrode 60 and the gate insulating layer 50 are used as a barrier layer, and the active layer 40 is plasma-treated to oxidize the metal of the source contact region 42 and the drain contact region 43.
- the material semiconductor material becomes a conductor, and the metal oxide semiconductor material of the channel region 41 maintains semiconductor characteristics; as shown in FIG. 8, after the plasma processing process is finished, the photoresist layer 52 is peeled off.
- the metal oxide semiconductor material is indium gallium zinc oxide (IGZO)
- the reaction gas used in the chemical vapor deposition process of silicon nitride (SiN x ) is known to include silane and ammonia (NH 3 ), wherein ammonia easily introduces hydrogen into the active layer 40, resulting in a metal oxide semiconductor material.
- the material of the first interlayer insulating layer 71 includes silicon oxynitride, and the material of the second interlayer insulating layer 72 includes silicon oxide;
- the thickness of the gate insulating layer 50 is The material of the gate insulating layer 50 includes silicon oxide (SiO x ).
- Step S20 referring to FIG. 14, a passivation layer 90 covering the source electrode 81 and the drain electrode 82 is formed on the second interlayer insulating layer 72 of the TFT substrate 100, and is formed on the passivation layer 90 by etching. a first via 901 above the source 81;
- the thickness of the pixel defining layer 93 is The material of the pixel defining layer 93 is an organic photoresist material, and the composition and type of the organic photoresist material are not limited.
- the present invention further provides an OLED panel comprising: a TFT substrate 100 as described above, and a second interlayer insulating layer 72 disposed on the TFT substrate 100 and a passivation layer 90 covering the source 81 and the drain 82, a flat layer 91 disposed on the passivation layer 90, an OLED anode 92 disposed on the flat layer 91, and the flat layer 91 and the OLED a pixel defining layer 93 on the anode 92, an opening 935 disposed on the pixel defining layer 93 and corresponding to the OLED anode 92, an organic light emitting layer disposed in the opening 935 and located on the OLED anode 92 94, and a cathode 95 disposed on the pixel defining layer 93 and the organic light emitting layer 94;
- the passivation layer 90 and the flat layer 91 are provided with a third through hole 913 corresponding to the upper side of the source 81, and the OLED anode 92 is in contact with the source 81 via the third through hole 913.
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Abstract
Description
Claims (9)
- 一种TFT基板的制作方法,包括如下步骤:步骤S1、提供衬底基板,在所述衬底基板上形成遮光层,在所述衬底基板上形成覆盖所述遮光层的缓冲层,在所述缓冲层上形成对应于所述遮光层上方的有源层,所述有源层的材料为金属氧化物半导体材料;步骤S2、在所述有源层上形成栅极绝缘层,在所述栅极绝缘层上形成栅极,所述栅极与栅极绝缘层上下对齐,所述栅极与栅极绝缘层在有源层上限定出对应于栅极绝缘层下方的沟道区以及分别位于沟道区两侧的源极接触区与漏极接触区;对有源层的源极接触区与漏极接触区进行导体化处理,使源极接触区与漏极接触区的金属氧化物半导体材料变为导体,沟道区的金属氧化物半导体材料保持半导体特性;步骤S3、在所述缓冲层上形成覆盖所述栅极与有源层的第一层间绝缘层,所述第一层间绝缘层的材料包括氮氧化硅;在所述第一层间绝缘层上形成第二层间绝缘层,所述第二层间绝缘层的材料包括氧化硅;步骤S4、在所述第一层间绝缘层与第二层间绝缘层上形成分别对应于源极接触区与漏极接触区上方的第一通孔与第二通孔;在所述第二层间绝缘层上形成源极与漏极,所述源极与漏极分别通过第一通孔与第二通孔和有源层的源极接触区与漏极接触区电性连接,制得TFT基板。
- 如权利要求1所述的TFT基板的制作方法,其中,所述氮氧化硅采用化学气相沉积方法制得,反应气体包括硅烷、氨气及一氧化二氮;所述氧化硅采用化学气相沉积方法制得,反应气体包括硅烷与一氧化二氮。
- 如权利要求1所述的TFT基板的制作方法,其中,所述第一层间绝缘层的厚度小于所述第二层间绝缘层的厚度。
- 如权利要求1所述的TFT基板的制作方法,其中,所述步骤S2包括:在所述缓冲层上形成覆盖所述有源层的栅极绝缘层,在所述栅极绝缘层上沉积栅极金属层;在所述栅极金属层上形成光阻层,利用黄光制程对所述光阻层进行图形化处理,保留下来的光阻层在所述栅极金属层上定义出栅极图案;以所述光阻层为阻挡层,对所述栅极金属层进行蚀刻,得到对应于有源层上方的栅极;以所述光阻层与栅极为阻挡层,对栅极绝缘层进行蚀刻,仅保留对应于栅极下方的部分,其余部分均被蚀刻去除,保留的栅极绝缘层位于有源层上并与栅极上下对齐,所述栅极与栅极绝缘层在有源层上限定出对应于栅极绝缘层下方的沟道区以及分别位于沟道区两侧的源极接触区与漏极接触区;以光阻层、栅极与栅极绝缘层为阻挡层,对有源层进行等离子体处理,使源极接触区与漏极接触区的金属氧化物半导体材料变为导体,沟道区的金属氧化物半导体材料保持半导体特性;等离子体处理制程结束后,剥离光阻层。
- 一种TFT基板,包括:衬底基板、设于所述衬底基板上的遮光层、设于所述衬底基板上且覆盖所述遮光层的缓冲层、设于所述缓冲层上且对应于所述遮光层上方的有源层、设于所述有源层上的栅极绝缘层、设于所述栅极绝缘层上且与所述栅极绝缘层上下对齐的栅极、设于所述缓冲层上且覆盖所述栅极与有源层的第一层间绝缘层、设于所述第一层间绝缘层上的第二层间绝缘层、以及设于所述第二层间绝缘层上的源极与漏极;所述第一层间绝缘层的材料包括氮氧化硅,所述第二层间绝缘层的材料包括氧化硅;所述有源层包括对应于栅极绝缘层下方的沟道区以及分别位于沟道区两侧的源极接触区与漏极接触区,所述源极接触区与漏极接触区的材料为导体化的金属氧化物半导体材料,所述沟道区的材料为保持半导体特性的金属氧化物半导体材料;所述第一层间绝缘层与第二层间绝缘层上设有分别对应于源极接触区与漏极接触区上方的第一通孔与第二通孔;所述源极与漏极分别通过第一通孔与第二通孔和有源层的源极接触区与漏极接触区电性连接。
- 如权利要求6所述的TFT基板,其中,所述第一层间绝缘层的厚度小于所述第二层间绝缘层的厚度。
- 一种OLED面板的制作方法,包括如下步骤:步骤S10、按照如权利要求1所述的TFT基板的制作方法制得TFT基 板;步骤S20、在所述TFT基板的第二层间绝缘层上形成覆盖源极与漏极的钝化层,并在所述钝化层上蚀刻形成对应于源极上方的第一过孔;在所述钝化层上形成平坦层,并采用黄光制程在所述平坦层上形成第二过孔,所述第一过孔与第二过孔上下对应且相互贯通,共同构成第三通孔;步骤S30、在所述平坦层上形成OLED阳极,所述OLED阳极经由第三通孔与源极相接触;步骤S40、在所述平坦层与OLED阳极上形成像素定义层,并采用黄光制程在所述像素定义层上形成对应于所述OLED阳极上方的开口;步骤S50、在所述开口内的OLED阳极上形成有机发光层;步骤S60、在所述像素定义层及所述开口内的有机发光层上形成阴极。
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JP2020513574A JP7058724B2 (ja) | 2017-10-09 | 2017-11-25 | Tft基板とその製造方法、及びoledパネルの製造方法 |
KR1020207013117A KR102284344B1 (ko) | 2017-10-09 | 2017-11-25 | Tft기판과 그의 제조방법, 및 oled패널의 제조방법 |
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CN107689345A (zh) | 2018-02-13 |
US10497620B2 (en) | 2019-12-03 |
EP3703111A4 (en) | 2021-09-22 |
EP3703111A1 (en) | 2020-09-02 |
KR20200060761A (ko) | 2020-06-01 |
JP2020532876A (ja) | 2020-11-12 |
JP7058724B2 (ja) | 2022-04-22 |
US20190229017A1 (en) | 2019-07-25 |
CN107689345B (zh) | 2020-04-28 |
KR102284344B1 (ko) | 2021-08-04 |
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