WO2008075727A1 - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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- WO2008075727A1 WO2008075727A1 PCT/JP2007/074451 JP2007074451W WO2008075727A1 WO 2008075727 A1 WO2008075727 A1 WO 2008075727A1 JP 2007074451 W JP2007074451 W JP 2007074451W WO 2008075727 A1 WO2008075727 A1 WO 2008075727A1
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- Prior art keywords
- film
- transparent
- insulator film
- transparent insulator
- semiconductor device
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4908—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET for thin film semiconductor, e.g. gate of TFT
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42384—Gate electrodes for field effect devices for field-effect transistors with insulated gate for thin film field effect transistors, e.g. characterised by the thickness or the shape of the insulator or the dimensions, the shape or the lay-out of the conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L29/78603—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the insulating substrate or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L29/78606—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
- H01L29/78639—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 drain or source connected to a bulk conducting substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/1292—Multistep manufacturing methods using liquid deposition, e.g. printing
Definitions
- the present invention relates to a semiconductor device, in particular, a thin film transistor (TFT), and a manufacturing method thereof.
- TFT thin film transistor
- display devices such as liquid crystal display devices, organic EL devices, and inorganic EL devices are mainly flat.
- a conductive pattern such as a wiring pattern and an electrode pattern is sequentially formed and patterned.
- the electrode film and display device are
- a display device is manufactured by sequentially depositing and patterning various films necessary for the device to be formed.
- Patent Document 1 and Patent Document 2 describe a technique for eliminating a step difference in a wiring pattern and reducing the resistance.
- wiring is performed on the surface of a transparent substrate. It is disclosed that a transparent insulating material having a height equivalent to this is formed so as to be in contact with the wiring pattern.
- Patent Document 2 further discloses a method for further flattening the wiring by hot pressing or CMP.
- Patent Document 3 includes a gate electrode including a base adhesion layer, a catalyst layer, a conductive metal layer, and a diffusion suppression layer formed thereon, whereby a glass substrate and It has been proposed to improve the adhesion and flatness of the gate electrode!
- Patent Literature l WO 2004/110117
- Patent Document 2 JP 2005-210081
- Patent Document 3 Japanese Patent Application 2005- 173050
- Patent Document 1 discloses that the characteristics of a display device can be improved by embedding a wiring in a groove formed by a resin pattern to form a thick film wiring. Methods such as an inkjet method and a screen printing method are disclosed as methods. However, it has been found that the disclosed method has a problem in adhesion to the substrate. Furthermore, as described in Patent Document 1, it is also found that when the wiring is formed by conductive ink, screen printing, or the like, the flatness of the insulating layer or the like formed on the wiring whose surface is rough is deteriorated. It was.
- Patent Document 2 as a method of solving the problem of the roughness of the wiring surface, a heat pressing process in which the insulating film and the embedded wiring are pressed by a pressing member, or a process of performing a CMP process is proposed.
- the method of flattening these wirings is not practical, especially for glass substrates with a size of 5th generation lOOmm x 1300mm or larger! /
- a slight glass distortion leads to breakage, and uniform polishing of the entire surface of a large glass substrate by CMP is extremely difficult, leading to an increase in cost.
- Patent Document 3 discloses a step of modifying the surface of an insulating substrate so as to improve adhesion, a step of forming a resin film on the insulating substrate, and patterning the resin film to form an electrode.
- the method includes at least a step of forming a recess in which the wiring is accommodated, a step of applying a catalyst to the recess, a step of heat-curing the resin film, and a step of forming a conductive material in the recess by a plating method.
- a manufacturing method is proposed.
- a conductive metal layer such as a gate electrode for example, a Cu layer is formed by an electroless plating method, and a W layer is formed thereon by a selective CVD method as a Cu diffusion suppression layer, or a Ni layer is formed by an electroless plating method. It is formed as a gate electrode.
- the adhesion of the gate electrode to the substrate is improved, and even a gate electrode having a width of 20 111 and a length of 50 m can form a desired pattern regardless of the size. Is possible.
- the flatness of the gate insulating layer formed on the gate electrode having a rough surface was poor.
- the flatness of the surface of the Cu layer formed by electroless plating reaches 17.74 nm with Ra, and the flatness of the Ni layer formed thereon also has a roughness of 8.58 nm with Ra.
- An object of the present invention is to provide a thin film transistor (TFT) having excellent flatness of a gate insulating film and a method for manufacturing the same.
- Another object of the present invention is to provide a thin film transistor having a gate insulating film with excellent interface flatness and high transparency, and a method for manufacturing the same.
- Still another object of the present invention is to provide a coating agent capable of forming a gate insulating film having excellent transparency and flatness.
- the gate insulating film is composed of at least two layers, and at least one of the gate insulating films has a repeating unit of MO as a main skeleton, And its composition is R MO [wherein R is a non-hydrolyzable substituent, M is any element of Si, Ti, Al, Zr, Zn, Sn and In, and x is an integer from 0 to 3.
- Each y represents a number, and y satisfies the following formula: (mx) / 2 ⁇ y ⁇ mx-0. 5 (m is the valence of M).
- a semiconductor device is obtained, which is a transparent insulator film B composed of one kind or two or more kinds of oxides represented by the following formula.
- a transparent substrate, a transparent insulator film A provided on one principal surface of the transparent substrate and having a groove reaching the principal surface, and the groove in the groove In the semiconductor device, comprising: a gate electrode formed so that a surface thereof is substantially flat with a surface of the transparent insulator film A; and a semiconductor layer provided on the gate electrode with a gate insulating film interposed therebetween.
- the insulating film is composed of at least two layers, and at least one of the gate insulating films is formed by heating in a temperature range of 150 to 300 ° C., and the turbidity (Hz) is 3% or less and the transmittance (Tt ) Is 80% or more of the transparent insulator film B, a semiconductor device can be obtained.
- the transparent insulator film B is a transparent insulator coating film formed by coating a coating liquid.
- the semiconductor device described in the embodiment is obtained.
- the transparent insulator film B has a surface roughness (Ra) of 5 nm or less, according to any one of the first to third aspects.
- a semiconductor device can be obtained.
- the transparent insulator film B satisfies a relationship of 280> d / ⁇ , where d (A) is the thickness and ⁇ is the relative dielectric constant.
- R MX (wherein R is a non-hydrolyzable substituent, and M is
- any element of Si, Ti, Al, Zr, Zn, Sn and In, X is a hydrolyzable substituent, x is an integer of 0 to 3, and m is the valence of M.
- the condensate obtained by hydrolytic condensation reaction of the compound represented by) is dissolved or separated in an organic solvent, water or a mixed solvent thereof.
- one or more R MX (wherein R is non-hydrolyzed).
- M is any element of Si, Ti, Al, Zr, Zn, Sn and In
- X is a hydrolyzable substituent
- X is an integer from 0 to 3
- m is the valence of M Respectively.
- the gate insulating film further includes an insulating film C formed by CVD and having a relative dielectric constant of 4 or more. A semiconductor device described in any of the embodiments is obtained.
- the insulator film C is transparent and extends above the transparent insulator film B.
- Equipment is obtained
- X is a hydrolyzable substituent
- X is an integer of 0 to 3
- m is the valence of M.
- the step of forming the transparent insulator film C having a relative dielectric constant of 4 or more so as to cover the transparent insulator film B by CVD is performed by heating the coating film.
- the present invention by providing an insulating coating film on a gate electrode having a rough surface, the surface has a flatness of Ra of 5 nm or less, and has high transparency and optically and electrically excellent characteristics.
- the gate insulating film is flat and the interface with the channel region is flat to prevent carrier interface scattering, achieve high carrier mobility, and maintain good optical and electrical characteristics in parts other than the gate electrode.
- An insulating film can be provided.
- a coating agent excellent in transparency and flatness and suitable for forming a gate insulating film can be obtained.
- FIG. 1 is a cross-sectional view showing an example of the structure of a thin film transistor according to the present invention.
- FIG. 2 is an enlarged sectional view showing an example of the structure of the gate electrode portion of the thin film transistor according to the present invention.
- FIG. 3 is a cross-sectional view illustrating one step of a method for manufacturing a thin film transistor according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view illustrating a process performed after the process shown in FIG. 3.
- FIG. 5 is a cross-sectional view illustrating a process performed after the process shown in FIG. 4.
- FIG. 6 is a cross-sectional view illustrating a process performed after the process shown in FIG. 5.
- FIG. 7 is a cross-sectional view illustrating a process performed after the process shown in FIG.
- FIG. 1 shows the thin film transistor of the present invention.
- FIG. 2 is a cross-sectional view showing an example of the structure of (TFT).
- the illustrated thin film transistor includes a transparent resin film 11 (transparent insulator film A) made of a transparent photosensitive resin formed on a glass substrate (insulating substrate) 10. And a gate electrode 12 formed on the transparent resin film 11 so as to reach the glass substrate 10 and formed to the same height as the transparent resin film 11, and the transparent resin film 11 and the gate electrode 12 A gate insulating film 13 formed of an insulating coating film 131 (corresponding to the transparent insulating film B) formed thereon and a CVD dielectric film 132 (corresponding to the insulating film C) thereon, and the gate A semiconductor layer 14 formed on the electrode 12 through the gate insulating film 13, and a source electrode 15 and a drain electrode 16 connected to the semiconductor layer 14 are provided.
- the gate insulating film 13 is insulated from the transparent insulator film B131. It is preferably formed from two layers of body membrane C132. Further, the transparent insulator film B131 is preferably formed on the surface of the transparent insulator film Al 1 including the surface of the gate electrode 12 from the viewpoint of satisfactorily expressing the desired effect of the present invention! .
- FIG. 2 is an enlarged cross-sectional view showing the structure of the gate electrode portion of the thin film transistor according to the present invention.
- the illustrated gate electrode 12 is composed of a base adhesion layer 121, a catalyst layer 122, a conductive metal layer 123, and a conductive metal diffusion suppression layer 124 from the glass substrate 10 side toward the semiconductor layer side (that is, in order from the bottom of the figure).
- the gate electrode 12 is embedded in a groove formed in the flat transparent resin film 11.
- the surface of the gate electrode 12 and the transparent resin film 11 are embedded in the groove of the transparent resin film so as to form substantially the same plane. For this reason, the flatness of the upper structure of the gate electrode 12 is ensured, but there is a problem with the flatness when viewed microscopically. That is, the conductive metal layer 123 is usually formed by the electroless plating of Cu. The flatness of the surface of the conductive metal layer 123 (Cu layer) by the electroless plating reaches 17.74 nm in Ra, The surface of the conductive metal diffusion suppression layer 124 (electroless plating Ni layer) formed on the surface also has a flatness of 8 • 58 nm.
- an insulating coating film having a thickness of 40 nm or more is formed as the transparent insulating film B131 on the conductive metal diffusion suppressing layer 124, and this film is a gap between the gate electrode 12 and the resin film 11.
- 1 Fills 12 and provides a flat surface with Ra of 5nm or less that does not reflect irregularities on the surface of the gate electrode 12.
- the surface of the silicon nitride dielectric film (insulator film C) 132 having a thickness of 150 to 160 nm formed by CVD is formed on the transparent insulator film B131 which is an insulator coating film (overcoat film). I was able to get sex.
- TFT thin film transistor
- the transparent insulator film B131 which is an insulator coating film (overcoat film), is conventionally known! /, Formed by using the following coating agent in place of SOG (spin-on-glass).
- Organic solvents such as hydrogen and water can be used. These may be used alone or in combination of two or more.
- the coating agent is R MX (where R is a non-hydrolyzable substituent, M is Si, Ti, Al,
- X is a hydrolyzable substituent
- x is an integer from 0 to 3
- m is the valence of M.
- the non-hydrolyzable substituent of R is alkyl
- the non-hydrolyzable substituent include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- the hydrolyzable substituent of X is a halogen atom, an alkoxyl group, hydrogen, an isocyanate group, a silazane group, a coordinating substituent, or the like.
- examples of the hydrolyzable substituent include chlorine atom, methoxy group, ethoxy group, ⁇ -propoxy group, isopropoxy group, ⁇ -butoxy group, isobutoxy group, sec-butoxy group, tert- Butoxy group, pentoxy group, hexoxy group, cyclopentoxy group, cyclohexoxy group, acetylethylacetonate group
- a methoxy group, an ethoxy group, a propoxy group, and a butoxy group are preferable from the viewpoint of easy control of the reaction and cost.
- M Si, Ti, and A1 are preferable, and as X, 0 to 2 forces S are preferable.
- Examples of the compound represented by R MX include methyltrimethoxysilane and methyl.
- n noletrimethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, butynoletrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, methyltrichlorosilane, ethyltrichlorosilane Silane, dimethyldichlorosilane, tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, tetraisopropoxysilane, tetra-n-butoxysilane, tetraisobutoxysilane, tetra-sec-butoxysilane, tetra-tert-butoxysilane, tetrata Lorosilane, etc., and corresponding tetraalkoxyt
- triisopropoxysilane etyltrimethoxysilane, etyltriethoxysilane, phenyltrimethoxysilane, dimethylenoresimethoxysilane, tetramethoxysilane, tetra Ethoxysilane, etc., and tetraalkoxytitanium corresponding to these are preferred.
- the molar ratio (the former / the latter) of 1/9 to 8/2 is preferable as the amount ratio of the two condensates that are preferably used by mixing a condensate of methyltrimethoxysilane and tetraethoxysilane.
- the hydrolysis-condensation reaction of the compound represented by R MX is, for example, an acid catalyst as a catalyst.
- the content of the condensate in the coating agent is not particularly limited, but is usually 0.5 to 25% by weight, and the optimum value varies depending on the coating method and film thickness setting. From the viewpoint of change of the agent over time; [0045] 3.
- the coating agent is heated after being coated on the surface including the gate electrode 12 and the transparent insulator film A11 which is a transparent resin film.
- a transparent insulator film B 131 is formed as an insulator coating film (overcoat film) on the gate electrode 12 and the transparent insulator film All.
- the components (composition) and characteristics of the material constituting the transparent insulator film B131, which is an insulator coating film (overcoat film), are as follows.
- the repeating unit of MO is the main skeleton, and its composition is R MO [wherein R is a non-hydrolyzable substituent, M is any of Si, Ti, Al, Zr, Zn, Sn and In. Element, x represents an integer of 0 to 3, and y satisfies the following formula: (mx) / 2 ⁇ y ⁇ mx-0.5 (m is the valence of M). ] It is comprised by the 1 type of oxide represented by, or a mixture of 2 or more types. R is the same as above. The preferred embodiments of R, M, and ⁇ are the same.
- the surface roughness Ra is 5 nm or less.
- the insulation coating film has Hz (turbidity) ⁇ 3% and Tt (transmittance)> 80%. It was shown that the gate insulating film 13 of the thin film transistor had sufficient transparency.
- the relative permittivity is measured by CVmap92 manufactured by Four Dimensions, Inc.
- the surface roughness Ra is measured by AFM (SPA400 manufactured by Seiko Instruments Inc.)
- the turbidity and transmittance are measured by a turbidimeter (Japan).
- a silicon nitride dielectric film is formed on the surface of the transparent insulator film B131 as an insulator film C132 by CVD.
- a transparent insulator film 131 as an insulator coating film and a CVD dielectric film thereon
- EOT silicon dioxide equivalent film thickness obtained by multiplying the quotient obtained by dividing the dielectric constant of silicon dioxide by the average dielectric constant of the film
- the thickness of the gate insulating film 13 is too thin, the leakage current increases.
- a maximum voltage of 15V is applied between the gate and the source of the TFT, so the breakdown voltage may be 15V or more.
- EOT is 95nm or more! /.
- the thickness of the insulator coating film (that is, the transparent insulator film B) 131 constituting the gate insulating film 13 does not depend on the roughness of the base to obtain a flat surface (the surface of the base). If the roughness is P—V and about 30 nm), the physical film thickness must be at least 40 nm. Considering that the dielectric constant of this film can vary widely, the maximum dielectric constant is about 10, and it is preferable that the silicon dioxide equivalent film thickness (EOT) be 15 nm or more. In the case of the composite gate insulating film 13, the maximum film thickness is preferably about 120 nm or less. In calculating d / ⁇ , the film thickness of the transparent insulator film B131 may be converted into ⁇ .
- the thickness of the CVD dielectric film (insulator film C) 132 is preferably 80 nm or more in terms of EOT, considering that the breakdown voltage is mainly assumed by this film.
- a glass substrate 10 is prepared as a substrate.
- the glass substrate may be a large substrate capable of forming a large screen of 30 inches or more.
- This glass substrate is treated with a 0.5 volume% hydrofluoric acid aqueous solution for 10 seconds and washed with pure water to remove the surface contamination by lift-off.
- an aminopropylethoxysilane as a silane coupling agent was added at a concentration of 0.1% by volume to an aqueous solution in which the pH was controlled to 10 by adding sodium hydroxide to pure water.
- the base adhesion layer 121 an amino group is substantially disposed on the substrate surface, and the metal complex can form a coordinated structure.
- the silane coupling agent is usually transparent, the effect of the present invention can be obtained even when it is formed over the entire surface of the glass substrate. Further, the transparent photosensitizer used in the glass substrate and the subsequent steps is used. Preferred from the viewpoint of obtaining adhesiveness of the adhesive resin.
- a positive photoresist solution is applied to the surface of the base adhesive layer using a spinner, and pre-beta treatment is performed on a hot plate at 100 ° C for 120 seconds.
- a photosensitive transparent resin film having a thickness of ⁇ was formed as a transparent resin film All.
- a photoresist containing an alkali-soluble alicyclic olefin-based resin described in JP-A-2002-296780 was used as the positive photoresist.
- Organic materials that form the transparent resin film Al l include acrylic resins, silicone resins, fluorine resins, polyimide resins, polyolefin resins, alicyclic olefin resins, and epoxy resins.
- the transparent resin film Al 1 is, in particular, a photosensitive transparent resin composition as detailed in JP-A-2001-188343 or JP-A-2002-296780. It is preferable to use and create.
- the photosensitive transparent resin is mixed with g, h, and i rays through a mask pattern by a mask aligner.
- the membrane was selectively irradiated.
- development was performed with a 0.3 wt% tetramethylammonium hydroxide aqueous solution for 90 seconds, followed by rinsing with pure water for 60 seconds to form grooves having a predetermined pattern on the glass substrate 10.
- heat treatment was performed at 230 ° C. for 60 minutes in a nitrogen atmosphere, and the photosensitive transparent resin film (that is, transparent resin film A) 11 was cured.
- the substrate provided with the palladium catalyst layer 122 is immersed in a copper electroless plating solution (PGT manufactured by Uemura Kogyo Co., Ltd.), and the copper layer ( A thickness of 1.9 ⁇ 111) was formed as the conductive metal layer 123.
- the copper layer is preferably finished at a position lower than the surface height of the transparent photosensitive resin 11 by an amount corresponding to the thickness of the subsequent conductive metal diffusion suppressing film 124.
- an insulator coating film (ie, transparent insulator film B) 131 is formed so as to extend on the surface of the transparent resin film 11 including the surface of the gate electrode 12. .
- the illustrated insulator coating film 131 was formed using the following coating agent.
- methylenotrimethoxysilane (71 ⁇ Og), tetraethoxysilane (52 ⁇ Og), IPA (isopropyl alcohol; 97 ⁇ lg), 0. IN nitric acid (9.6 g) and water (82.7 g) ) Were sequentially mixed and subjected to a hydrolytic condensation reaction for 24 hours.
- the obtained reaction solution was diluted with a mixed solvent of methyl isobutyl ketone (437.0 g) and propylene glycol monomethyl ether (250.5 g) to obtain a coating agent.
- This coating agent was applied, and the obtained coating film was heat-treated at 300 ° C. for 1 hour to obtain an insulator coating film 131.
- the illustrated insulator coating film 131 is made of polymethylsilsesquioxane (ie, CH 2 SiO 2
- a Si N film is grown by CVD using a microwave-excited RLSA plasma processing apparatus, and insulation is performed.
- the body film C 132 was formed, and thereby the gate insulating film 13 provided with the transparent insulator film B 131 and the insulator film C 132 was formed.
- the relative dielectric constant of the insulator film C132 is preferably 4 or more from the viewpoint that the relative dielectric constant of the SiO film, which is usually used as a gate insulating film in the semiconductor industry, is 3.9.
- the upper limit of the relative dielectric constant is usually about 7.5.
- the insulator film C is preferably substantially transparent.
- the material of the insulator film C that can satisfy these characteristics is not particularly limited, but usually a SiN film is preferably used.
- an amorphous silicon film 141 and an n + type amorphous silicon film 142 are continuously deposited by a known PECVD method, and the gate electrode 12 and the n-type amorphous silicon film 142 are deposited by a photolithography method and a known RIE method. Part of the amorphous silicon film was removed except for the periphery.
- the source electrode and the drain electrode are sequentially formed in the order of Ti, Al, and Ti by a known sputtering method, and patterning is performed by a photolithography method.
- the source electrode 15 and the drain electrode 16 were formed.
- the n + type amorphous silicon film 142 was etched by a known method to separate the source region and the drain region.
- a silicon nitride film (not shown) was formed as a protective film by a known PECVD method to complete the thin film transistor (TFT) of the present invention.
- TFT thin film transistor
- liquid crystal display device only the liquid crystal display device has been described.
- present invention can be applied to various substrates constituting a flat display panel.
- the gate electrode As a material constituting the gate electrode, silver or a transparent oxide conductor (ITO or the like) may be used in addition to copper.
- ITO transparent oxide conductor
- the present invention can be applied to a display device such as a liquid crystal display device, an organic EL device, an inorganic EL device, etc. to increase the size of the display device, and to a wiring other than the display device.
- a display device such as a liquid crystal display device, an organic EL device, an inorganic EL device, etc. to increase the size of the display device, and to a wiring other than the display device.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Thin Film Transistor (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
Claims
Priority Applications (3)
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US12/520,317 US20100059820A1 (en) | 2006-12-21 | 2007-12-19 | Semiconductor device and method for manufacturing semiconductor device |
EP07850921A EP2096678A4 (en) | 2006-12-21 | 2007-12-19 | SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING THE SAME |
CN2007800475155A CN101563782B (zh) | 2006-12-21 | 2007-12-19 | 半导体装置和半导体装置的制造方法 |
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JP2006344404A JP5329038B2 (ja) | 2006-12-21 | 2006-12-21 | 半導体装置及び半導体装置の製造方法 |
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EP (1) | EP2096678A4 (ja) |
JP (1) | JP5329038B2 (ja) |
KR (1) | KR20090097861A (ja) |
CN (1) | CN101563782B (ja) |
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JP2011114164A (ja) * | 2009-11-26 | 2011-06-09 | Ube Nitto Kasei Co Ltd | 素子分離材料用塗布液の作製方法、素子分離材料用塗布液、素子分離層用薄膜、素子分離層用薄膜の形成方法、基板、及び、基板の形成方法 |
JP2011114163A (ja) * | 2009-11-26 | 2011-06-09 | Ube Nitto Kasei Co Ltd | 素子分離材料用塗布液、素子分離材料用塗布液の作製方法、素子分離層用薄膜、素子分離層用薄膜の形成方法、基板、及び、基板の形成方法 |
JP5462603B2 (ja) * | 2009-11-26 | 2014-04-02 | 宇部エクシモ株式会社 | 素子分離材料用塗布液、素子分離材料用塗布液の作製方法、素子分離層用薄膜、素子分離層用薄膜の形成方法、基板、及び、基板の形成方法 |
JP2011114165A (ja) * | 2009-11-26 | 2011-06-09 | Ube Nitto Kasei Co Ltd | 素子分離材料用塗布液の作製方法、素子分離材料用塗布液、素子分離層用薄膜、素子分離層用薄膜の形成方法、基板、及び、基板の形成方法 |
JP2012164963A (ja) * | 2010-11-26 | 2012-08-30 | Kobe Steel Ltd | 薄膜トランジスタの半導体層用酸化物およびスパッタリングターゲット、並びに薄膜トランジスタ |
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Also Published As
Publication number | Publication date |
---|---|
CN101563782B (zh) | 2011-07-13 |
TW200847442A (en) | 2008-12-01 |
CN101563782A (zh) | 2009-10-21 |
EP2096678A1 (en) | 2009-09-02 |
JP2008159683A (ja) | 2008-07-10 |
EP2096678A4 (en) | 2010-06-30 |
US20100059820A1 (en) | 2010-03-11 |
KR20090097861A (ko) | 2009-09-16 |
JP5329038B2 (ja) | 2013-10-30 |
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