JP6605146B2 - タッチパネル付き表示装置 - Google Patents
タッチパネル付き表示装置 Download PDFInfo
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- JP6605146B2 JP6605146B2 JP2018529903A JP2018529903A JP6605146B2 JP 6605146 B2 JP6605146 B2 JP 6605146B2 JP 2018529903 A JP2018529903 A JP 2018529903A JP 2018529903 A JP2018529903 A JP 2018529903A JP 6605146 B2 JP6605146 B2 JP 6605146B2
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
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- 229910004286 SiNxOy Inorganic materials 0.000 description 2
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/7869—Thin film transistors, i.e. transistors with a channel being at least partly a thin film having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
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- G—PHYSICS
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- 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
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- 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
- H01L27/1222—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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- 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
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- Condensed Matter Physics & Semiconductors (AREA)
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Description
図4Aに示すTFT領域のガラス基板40の上には、表示制御素子であるTFT42が設けられている。TFT42は、ゲート電極42a、半導体膜42b、ソース電極42c、及びドレイン電極42dを含む。
図4B及び図4Cにおけるガラス基板40の上には、TFT領域におけるゲート電極42aと重ならない位置に信号線22が形成されている。信号線22は、例えば銅(Cu)、チタン(Ti)、モリブデン(Mo)、アルミニウム(Al)、マグネシウム(Mg)、コバルト(Co)、クロム(Cr)、タングステン(W)のいずれか、またはこれらの混合物からなる。
上述した実施形態において、TFT42のソース電極42cとドレイン電極42dとの間にエッチストッパ層が設けられていてもよい。この構成により、ソース電極42cやドレイン電極42dを形成する際のエッチングによって、半導体膜42bがダメージを受けることを防止できる。
また、上述した実施形態では、ボトムゲート型のTFTを例に説明したが、トップゲート型でもよい。また、半導体膜42bは酸化物半導体膜に限らず、アモルファスシリコン膜であってもよい。
また、上述した実施形態では、表示に用いられるTFT42と信号線22とは平面視で重ならない位置に設けられるため、信号線22とTFT42との間の寄生容量を低減できる。しかしながら、例えば、TFT42の下層に信号線22が配置される等、TFT42と信号線22とが平面視で重なるように配置されていてもよい。
また、上述した実施形態では、無機絶縁膜41よりもガラス基板40に近い位置にゲート電極42aが設けられているが、例えばゲート電極42aの下側、つまり、ガラス基板40側に無機絶縁膜41が設けられていてもよい。
Claims (3)
- アクティブマトリクス基板を備えるタッチパネル付き表示装置において、
前記アクティブマトリクス基板は、
基板と、
前記基板上に設けられた複数の画素電極と、
前記基板上において前記複数の画素電極と平面視で重なるように配置された複数の対向電極と、
前記複数の画素電極と前記複数の対向電極との間に設けられた絶縁膜と、
前記基板上において、画素電極に対して対向電極と反対側に設けられ、前記複数の対向電極のいずれかと接続され、タッチ駆動信号が供給される複数の信号線と、
前記複数の画素電極のそれぞれに接続された複数のスイッチング素子と、
前記複数の画素電極と、前記複数の信号線及び前記複数のスイッチング素子との間に設けられた有機系絶縁膜と、を備え、
前記複数の信号線の各々は、前記基板に接しており、
前記複数のスイッチング素子の各々は、ゲート電極、ソース電極、及びドレイン電極を含み、
前記アクティブマトリクス基板は、前記複数の信号線の各々を覆い、前記複数の信号線の各々と前記ゲート電極との間に設けられた第1の無機系絶縁膜をさらに備える、タッチパネル付き表示装置。 - 前記アクティブマトリクス基板は、
前記ゲート電極と前記第1の無機系絶縁膜とを覆うゲート絶縁膜と、
前記ソース電極及び前記ドレイン電極を覆い、前記ゲート絶縁膜と重なる第2の無機系絶縁膜と、をさらに備え、
前記有機系絶縁膜は、前記画素電極と前記第2の無機系絶縁膜との間に設けられる、請求項1に記載のタッチパネル付き表示装置。 - 前記アクティブマトリクス基板は、
前記複数の信号線の各々と平面視で重なる位置に、前記ゲート電極と同じ材料からなる第1金属膜と、前記第1金属膜と接し、前記ソース電極及び前記ドレイン電極と同じ材料からなる第2金属膜と、前記第2金属膜と接し、画素電極と同じ材料からなる第1透明電極膜と、前記第1透明電極膜と接し、対向電極と同じ材料からなる第2透明電極膜と、を備え、
前記複数の信号線の各々は、前記第1金属膜と接する、請求項2に記載のタッチパネル付き表示装置。
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