CN106796885A - The manufacture method of electrically conducting transparent distribution and electrically conducting transparent distribution - Google Patents

The manufacture method of electrically conducting transparent distribution and electrically conducting transparent distribution Download PDF

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Publication number
CN106796885A
CN106796885A CN201680002259.7A CN201680002259A CN106796885A CN 106796885 A CN106796885 A CN 106796885A CN 201680002259 A CN201680002259 A CN 201680002259A CN 106796885 A CN106796885 A CN 106796885A
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films
electrically conducting
conducting transparent
conductive oxide
oxide film
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CN106796885B (en
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盐野郎
盐野一郎
岁森悠人
野中庄平
斋藤淳
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/302Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
    • H01L21/306Chemical or electrical treatment, e.g. electrolytic etching
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/30Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
    • H01L21/31Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
    • H01L21/3205Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
    • H01L21/321After treatment
    • H01L21/3213Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/71Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/768Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Non-Insulated Conductors (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Physical Vapour Deposition (AREA)
  • Electrodes Of Semiconductors (AREA)

Abstract

The electrically conducting transparent distribution (10) is with the Ag films (11) being made up of Ag or Ag alloys and the transparent conductive oxide film (12) being laminated on the Ag films (11), and Wiring pattern is formed with by etching process, in the electrically conducting transparent distribution (10), in the scope of below 15nm, Ag films (11) are less than 1 μm relative to the overetch amount (L) of transparent conductive oxide film (12) to the thickness (ta) of Ag films (11).

Description

The manufacture method of electrically conducting transparent distribution and electrically conducting transparent distribution
Technical field
The present invention relates to a kind of for example for the electrically conducting transparent distribution and electrically conducting transparent distribution of display or contact panel etc. Manufacture method.
The application advocate based on patent application 2015-37950 in Japanese publication on 2 27th, 2015,2015 years 11 The moon 5 is in the patent application 2015-217683 of Japanese publication and the patent application in Japanese publication on the 25th in 2 months in 2016 The priority of No. 2016-34768, and its content is applied at this.
Background technology
For example, in liquid crystal display, organic el display, contact panel etc., as distribution, for example, such as patent document 1 Shown in~3, the electrically conducting transparent distribution of the stepped construction for being set to transparent conductive oxide film and metal film is applied.
In the electrically conducting transparent distribution, it is desirable to which the transmissivity (hereinafter referred to as visual perspective rate) of the light of visible region is higher And resistance is relatively low.
Here, forming Wiring pattern on stacked film of the transparent conductive oxide film with metal film and being set to electrically conducting transparent and match somebody with somebody During line, as shown in patent document 3~5, treatment typically is etched to above-mentioned stacked film.
In these patent documents 3~5, it is etched as the stacked film to transparent conductive oxide film and metal film Mode, proposition has the side being etched with two stages using transparent conductive oxide film etching solution and metal film etching solution Method or the method being etched in the lump to transparent conductive oxide film and metal film using the specific etching solution for constituting.
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2006-216266 publications
Patent document 2:Japanese Unexamined Patent Publication 2012-054006 publications
Patent document 3:Japanese Unexamined Patent Publication 2008-080743 publications
Patent document 4:Japanese Unexamined Patent Publication 2007-007982 publications
Patent document 5:Japanese Unexamined Patent Publication 2009-206462 publications
However, in recent years, the requirement of electrically conducting transparent distribution further improves visual perspective rate, it is therefore desirable to more unfertile land than ever Form metal film.
Here, when the thickness of metal film is set into relatively thin, there is metal film than transparent in above-mentioned conventional engraving method Conductive oxide film is preferentially etched and the big problem of the overetch quantitative change of metal film.
Especially, in recent years, due to the miniaturization of distribution, the width of distribution diminishes, if therefore metal film overetch amount it is big Then it is possible to that electric conductivity cannot be substantially ensured that.
The content of the invention
The present invention be in view of afore-mentioned and complete, its object is to provide a kind of electrically conducting transparent distribution and this transparent is led The manufacture method of electric distribution, the electrically conducting transparent distribution has visual perspective rate higher, and suppresses the overetch amount of metal film, Electric conductivity is substantially ensured that.
In order to solve the above problems, electrically conducting transparent distribution of the invention has the Ag films and stacking being made up of Ag or Ag alloys Transparent conductive oxide film on the Ag films, and Wiring pattern is formed with by etching process, the electrically conducting transparent distribution It is characterised by, the thickness of the Ag films is below 15nm, overetch of the Ag films relative to the transparent conductive oxide film Measure is less than 1 μm.
Electrically conducting transparent distribution of the invention, the thickness of the Ag films is below 15nm, therefore visual perspective rate is excellent.
Also, in electrically conducting transparent distribution of the invention, the overetch amount of the Ag films is suppressed to less than 1 μm, therefore Even if in the case where wiring width is narrower, it is also possible to ensure the width of metal film and reliably ensure that electric conductivity.
Here, in electrically conducting transparent distribution of the invention, preferably described Ag films are made up of the Ag alloys for constituting as follows:To close It is calculated as more than 0.05 atom % and the scope of below 10.0 atom % includes any one in Sn, In, Mg, Ti or two or more Element be used as addition element, and remainder is made up of Ag and inevitable impurity.
Electrically conducting transparent distribution according to this composition, Ag films are made up of following Ag alloys:To add up to more than 0.05 atom % And 10.0 scope below atom % is used as addition unit comprising any one in Sn, In, Mg, Ti or two or more elements Element, and remainder is made up of Ag and inevitable impurity, therefore, it is possible to improve Ag films relative to substrate and oxidation film Wetability.Thus, even if film forming is set into below 15nm in the thickness of the Ag films on substrate or on oxidation film, than relatively thin In the case of, it is also possible to suppress the cohesion of film, and resistance can be reduced and visual perspective rate is improved.
Also, in electrically conducting transparent distribution of the invention, can be made up of the Ag alloys for constituting as follows:It is also former comprising 0.01 Any one or two kinds in the Cu of the Sb of sub- more than % and more than 0.1 atom % are used as addition element, and all additions Element is added up to below 10.0 atom %, and remainder is made up of Ag and inevitable impurity.
Electrically conducting transparent distribution according to this composition, is made up of the Ag alloys for constituting as follows:Also include more than 0.01 atom % Sb and more than 0.1 atom % Cu in any one or two kinds be used as addition element, and all addition element conjunction It is calculated as below 10.0 atom %, and remainder is made up of Ag and inevitable impurity, therefore by adding Sb and Cu, can Further suppress the cohesion of film, and resistance can be reduced and visual perspective rate is improved.
And, in electrically conducting transparent distribution of the invention, preferably described transparent conductive oxide film is amorphous film.
Electrically conducting transparent distribution according to this composition, transparent conductive oxide film is amorphous film, described later therefore, it is possible to pass through Oxalic acid etching solution is reliably etched, and can reduce the overetch amount of Ag films.
In the manufacture method of electrically conducting transparent distribution of the invention, the electrically conducting transparent distribution have be made up of Ag or Ag alloys Ag films and the transparent conductive oxide film that is laminated on the Ag films, and be formed with Wiring pattern, the electrically conducting transparent distribution Manufacture method is characterised by, the thickness of the Ag films is set into below 15nm, and possessed to Ag films and described The stacked film of bright conductive oxide film is etched the etching process operation for processing and being formed Wiring pattern, the etching process operation In, the transparent conductive oxide film and the Ag films are dissolved in the lump using oxalic acid etching solution.
The manufacture method of electrically conducting transparent distribution of the invention, to the Ag films and the transparent conductive oxide The stacked film of thing film is etched treatment and forms the etching process operation of Wiring pattern, using oxalic acid etching solution to described Bright conductive oxide film and the Ag films are dissolved in the lump.Generally, oxalic acid etching solution is difficult to the etching of Ag films, but this hair In bright, the thickness of the Ag films is formed as into below 15nm, than relatively thin, therefore Ag films can be removed by oxalic acid etching solution.Also, In the oxalic acid etching solution, compared with transparent conductive oxide film, the etching of Ag films is poor, is lost therefore, it is possible to suppress crossing for Ag films Carve.
Here, in the manufacture method of electrically conducting transparent distribution of the invention, preferably described oxalic acid etching solution is concentration of oxalic acid Oxalic acid aqueous solution in the scope of more than 3 mass % and below 7 mass %.
The manufacture method of the electrically conducting transparent distribution according to this composition, as the oxalic acid etching solution, using concentration of oxalic acid 3 Oxalic acid aqueous solution in the scope of more than quality % and 7 below mass %, therefore, it is possible to Ag films and transparent conductive oxide film It is etched in the lump, and can reliably reduces the overetch amount of Ag films.
In accordance with the invention it is possible to provide a kind of with visual perspective rate higher, and suppress the overetch amount of metal film, Fully ensure that the electrically conducting transparent distribution of electric conductivity and the manufacture method of the electrically conducting transparent distribution.
Brief description of the drawings
Fig. 1 is the enlarged partial sectional view of the electrically conducting transparent distribution of embodiments of the present invention.
Fig. 2 is the amplification view of the etched facet of the electrically conducting transparent distribution of embodiments of the present invention.
Fig. 3 is the figure of the example for representing the X-ray diffraction measure for carrying out transparent conductive oxide film.
Fig. 4 is the flow chart of the manufacture method of the electrically conducting transparent distribution for representing embodiments of the present invention.
Fig. 5 is the enlarged partial sectional view of the electrically conducting transparent distribution of another embodiment of the present invention.
Specific embodiment
Hereinafter, refer to the attached drawing is to the electrically conducting transparent distribution of embodiments of the present invention and the manufacture method of electrically conducting transparent distribution Illustrate.
Electrically conducting transparent distribution 10 in present embodiment is used in various displays and contact panel.
As shown in figure 1, the electrically conducting transparent distribution 10 of present embodiment for example possesses Ag films 11 and transparent conductive oxide film 12, the film forming of Ag films 11 in the one side of substrate 30, the transparent conductive oxide film 12 in an overlapping manner film forming in this On Ag films 11.In addition, as substrate 30, it is possible to use glass substrate or PET film of alkali-free glass, pyrex etc. etc. are set Membrane of lipoprotein.
The electrically conducting transparent distribution 10 is etched by the stacked film with Ag films 11 and transparent conductive oxide film 12 Process to form Wiring pattern.
Also, in the electrically conducting transparent distribution 10, Ag films 11 are 1 μ relative to the overetch amount L of transparent conductive oxide film 12 Below m.Specifically, as shown in Fig. 2 during the distribution of the etched treatment of cross-section, the end face of transparent conductive oxide film 12 The distance of the 12e and end face 11e of Ag films 11 is less than 1 μm.Overetch amount L of the Ag films 11 relative to transparent conductive oxide film 12 More preferably less than 0.8 μm.
Also, in the electrically conducting transparent distribution 10, the thickness ta of Ag films 11 is in more than 3nm and the scope of below 15nm.
And, the thickness to of transparent conductive oxide film 12 is in more than 5nm and the scope of below 80nm.
In addition, in present embodiment, the width of electrically conducting transparent distribution 10 is set in the scope of more than 10 μm and less than 100 μm It is interior.
Here, Ag films 11 are made up of pure Ag or Ag alloys.In present embodiment, Ag alloys are by the Ag alloy structures that constitute as follows Into:To add up to it is more than 0.05 atom % and below 10.0 atom % scope comprising any one in Sn, In, Mg, Ti or Two or more elements is used as addition element, and remainder is made up of Ag and inevitable impurity.In addition, conduct can not The impurity for avoiding, for example, can enumerate Fe, Pb, Bi, Al, Zn of below 500ppm etc..
Here, illustrating the reasons why below in relation to the content of the addition element of regulation Ag alloys as described above.
Contained Sn, In, Mg, Ti are the effect effect with the wetability for improving Ag films 11 in the Ag alloys of composition Ag films 11 The element of fruit.Also, Sn, In, Mg, Ti have the work for further improving Ag films 11 and the adhesiveness of transparent conductive oxide film 12 Use effect.
Here, any one or the two or more elements in Sn, In, Mg, Ti add up to the feelings less than 0.05 atom % Under condition, it is possible to cannot fully play above-mentioned action effect.On the other hand, Sn, In, Mg, Ti are the unit that resistance is substantially improved Element, therefore it is possible to electricity if any one in Sn, In, Mg, Ti or two or more elements are total more than 10.0 atom % Resistive is high and declines electric conductivity.
According to this reason, in present embodiment, will add up to as the content of Sn, In, Mg, Ti of addition element regulation For in the scope of more than 0.05 atom % and below 10.0 atom %.The content of Sn, In, Mg, Ti be more preferably 0.1 atom % with The scope of upper and below 5.0 atom %.
In addition, in the Ag alloys of composition Ag films 11, addition element further can be used as containing Sb and Cu.
Sb, Cu are the element with following action effect, i.e., visual perspective rate need not be greatly reduced and need not be substantially improved Resistance can suppress the Ag cohesions of Ag films 11 and further improve environment resistant.Here, in Sb less than 0.01 atom %, Cu is less than In the case of 0.1 atom %, it is possible to cannot fully play above-mentioned action effect.According to this reason, present embodiment In, addition Sb when the content of Sb is set as more than 0.01 atom %, addition Cu when by the content of Cu be set as 0.1 atom % with On.
On the other hand, Sb and Cu are the element that resistance is substantially improved in the same manner as Sn, In, Mg, Ti.Therefore, this embodiment party In formula, during addition Sb and Cu, 10 atom % will be set as the total of the content of Sn, In, Mg, Ti, Sb, Cu of addition element Below.Total more preferably below 7.0 atom % of the content of Sn, In, Mg, Ti, Sb, Cu.
The transparent conductive oxide for constituting transparent conductive oxide film 12 is In-Sn oxides (ITO), Al-Zn oxides (AZO), In-Zn oxides (IZO), Zn-Sn oxides (ZTO), Zn-Sn-Al oxides (AZTO).
By using these transparent conductive oxides, the visible region of transparent conductive oxide film 12 can be higher maintained Light transmission (visual perspective rate) in domain, and resistance can be reduced.
Here, transparent conductive oxide film 12 is preferably amorphous film.
Specifically, in the X-ray diffraction measure of transparent conductive oxide film 12, exist with as shown in (a) such as Fig. 3 Clearly the crystalloid film of peak crystallization is compared, in the absence of the amorphous film of clearly peak crystallization preferably as shown in (b) of Fig. 3.
In present embodiment, transparent conductive oxide film 12 is the amorphous film of In-Sn oxides (ITO).
Also, in the electrically conducting transparent distribution 10 of present embodiment, in the state of the stacked film being etched before treatment, The visual perspective rate of visible region is more than 70%.
Also, in the electrically conducting transparent distribution 10 of present embodiment, in the state of the stacked film being etched before treatment, Sheet resistance is 40 Ω/below sq.
Then, the manufacture method of the electrically conducting transparent distribution 10 of present embodiment is illustrated with reference to Fig. 4.
(Ag films film formation process S01)
First, Ag films 11 are formed on substrate 30 using Ag alloy sputtering targets.
Here, for forming Ag alloy sputtering targets during Ag films 11, the composition of the Ag films 11 according to institute's film forming adjusts its group Into.
Ag alloy sputtering targets in present embodiment are manufactured as described below.
As raw material, prepare the Sn of the Ag and more than the mass % of purity 99.9 of more than the mass % of purity 99.9, In, Mg, Ti, Sb、Cu。
Then, in melting furnace, Ag is melted under high vacuum or inert gas atmosphere, and added in resulting liquation In any one or two or more, Sb, Cu in Sn, In, Mg, Ti of ormal weight any one or it is two or more.Afterwards, exist The Ag alloy pigs of above-mentioned composition are melted and made under vacuum or inert gas atmosphere.
Here, the fusing on Ag, preferably the atmosphere inside melting furnace is temporarily set to after vacuum to be replaced by Ar Carried out under atmosphere, after fusing, the liquation to Ag adds Sn, In, Mg, Ti, Sb, Cu under an ar atmosphere.In addition, Sn, In, Mg, Ti, Sb, Cu can also be added in the form of the foundry alloy of pre-production.
Resulting Ag alloy pigs are carried out it is cold rolling after, implement in an atmosphere for example with 600 DEG C keep two hours Heat treatment, be then machined, thus make given size Ag alloy sputtering targets.
In Ag film film formation process S01, above-mentioned Ag alloy sputtering targets are welded in anaerobic copper backing plate, and be installed on Magnetically controlled DC sputtering device.Now, it is opposed with Ag alloy sputtering targets and across regulation interval arrange substrate 30.
Then, will be exhausted inside magnetically controlled DC sputtering device to such as 5 × 10 by vacuum pumping hardware-5Below Pa Afterwards, Ar gases are imported and is set to the sputtering pressure of regulation, then apply the d.c. sputtering of such as 50W to target by dc source Power.
Thus, plasma is produced between substrate 30 and Ag alloy sputtering targets, and Ag films 11 is formed on substrate 30.
(transparent conductive oxide film film formation process S02)
Also, sputtered using the sputtering target being made up of transparent conductive oxide on the Ag films 11 of institute's film forming, and Transparent conductive oxide film 12 is formed on Ag films 11.In addition, being used as the situation of transparent conductive oxide film 12 in formation ito film Under, can select and be formed according to membrance casting condition to crystallize plasma membrane and amorphous film.
Thus, the stacked film for being laminated with Ag films 11 and transparent conductive oxide film 12 is formed.
(etching process operation S03)
Then, treatment is etched to above-mentioned stacked film, and forms Wiring pattern.
First, the painting erosion resistant agent liquid and after carrying out preliminary drying on the stacked film, is entered by exposure machine to Wiring pattern shape Row exposure, and dry after carrying out and form resist film.Afterwards, developer solution is impregnated in, and removes the resist film of exposure portion.
Also, oxalic acid etching solution is impregnated in, is etched in the lump to having removed the stacked film of part of resist.In addition, For etching mode, dipping is not limited to, it is possible to use spray etching etc..
Here, in present embodiment, as oxalic acid etching solution, using concentration of oxalic acid more than 3 mass % and 7 mass % with Under scope in oxalic acid aqueous solution.Also, the temperature of oxalic acid etching solution is set as 40~60 DEG C.Here, when concentration of oxalic acid is small When 3 mass %, it is possible to which etch-rate is slack-off and cannot effectively be etched treatment.
On the other hand, if concentration of oxalic acid is more than 7 mass %, it is likely that separate out oxalic acid in a liquid.According to case above, In present embodiment, the concentration of oxalic acid in oxalic acid aqueous solution is set in more than 3 mass % and in the scope of below 7 mass %.
Concentration of oxalic acid in oxalic acid aqueous solution is more preferably more than 3 mass % and below 5 mass %.
In addition, in the oxalic acid etching solution, in order to suppress the generation of etch residue, organic additive can be added.Oxalic acid And the content of the additive beyond water (solvent) is preferably limited to below 4 mass %.
(resist stripping process S04)
After etching process operation S03, corrosion inhibitor stripper is impregnated in, and peel off resist film.
Thus, the electrically conducting transparent distribution 10 of the Wiring pattern with regulation is produced.
In the electrically conducting transparent distribution 10 of present embodiment as constructed as above, Ag films 11 are relative to transparent conductive oxide film 12 Overetch amount L be less than 1 μm, even if therefore Wiring pattern shape in etching process operation S03 wiring width it is narrower In the case of, it is also possible to ensure the width of Ag films, and be able to ensure that electric conductivity.
Also, the thickness ta of Ag films 11 is in the scope of more than 3nm and below 15nm, therefore visual perspective rate is excellent, and And it is able to ensure that the electric conductivity of electrically conducting transparent distribution 10.Therefore, it is particularly suitable as the distribution of various displays and contact panel.
Also, in present embodiment, Ag films 11 are made up of the Ag alloys for constituting as follows:To add up to more than 0.05 atom % And 10.0 scope below atom % is used as addition unit comprising any one in Sn, In, Mg, Ti or two or more elements Element, remainder is made up of Ag and inevitable impurity.Therefore, the wetability of Ag films is improved, even if in Ag films 11 Thickness ta is below 15nm, than in the case of relatively thin, it is also possible to suppress the cohesion of film.Therefore, it is possible to reduce electrically conducting transparent distribution 10 resistance, and visual perspective rate can be improved.
And, in present embodiment, it is following composition to constitute the Ag alloys of Ag films 11:Except comprising above-mentioned addition element with Outward, also comprising more than 0.01 atom % any one party or two sides in the Sb and Cu of more than 0.1 atom %, also, all add Added elements are added up to below 10.0 atom %, and remainder is made up of Ag and inevitable impurity.In present embodiment, lead to Addition Sb and Cu are crossed, can further suppress the cohesion of film, can further reduce the resistance of electrically conducting transparent distribution 10, and can Further improve visual perspective rate.
Also, in the electrically conducting transparent distribution 10 of present embodiment, implement the stacked film before etching process operation S03 In, it is seen that the visual perspective rate in light region is more than 70%, and sheet resistance is 40 Ω/below sq, therefore as identification And the electrically conducting transparent distribution 10 of excellent electric conductivity, various displays, contact panel can be applied to.
And, in the present embodiment, transparent conductive oxide film 12 is amorphous ito film, therefore in etching process In operation S03, treatment can be reliably etched using oxalic acid etching solution.Therefore, it is possible to be reliably suppressed the mistake of Ag films 11 Etch quantity L.
The manufacture method of the electrically conducting transparent distribution 10 according to present embodiment, the thickness ta of Ag films 11 is formed as more than 3nm And in the scope of below 15nm, than relatively thin, therefore in etching process operation S03, even if in the situation using oxalic acid etching solution Under, it is also possible to Ag films 11 are removed, and Wiring pattern can be formed.
Also, in the present embodiment, as oxalic acid etching solution, using concentration of oxalic acid in more than 3 mass % and 7 mass % Oxalic acid aqueous solution in following scope, therefore, it is possible to be etched in the lump to Ag films 11 and transparent conductive oxide film 12, and And can reliably reduce the overetch amount L of Ag films 11.
And, in the present embodiment, the thickness to of transparent conductive oxide film 12 is in more than 5nm and the model of below 80nm In enclosing, therefore, it is possible to ensure the electric conductivity and visual perspective rate of transparent conductive oxide film 12.
In addition, the thickness to of transparent conductive oxide film 12 is following thickness:Using the optical constant (refraction of each single phase film Rate and extinction coefficient), optical analog is carried out with Ag films 11 and transparent conductive oxide film 12 this double-layer structure, by optical dry Disturb effect and the transmissivity of visible region is improved.
More than, embodiments of the present invention are illustrated, but the present invention is not limited to this, as long as not departing from this Can suitably be changed in the range of the technological thought of invention.
For example, in the present embodiment, Ag films 11 and transparent conductive oxide film are sequentially formed with the one side of substrate 30 12, but be not limited to this, or it is sequentially formed with the knot of transparent conductive oxide film 12 and Ag films 11 in the one side of substrate 30 Structure.
Also, for example, as shown in Figure 5, it is also possible to be to be formed with transparent conductive oxide film in a surface side of Ag films 111 112A and it is formed with the electrically conducting transparent distribution 110 of transparent conductive oxide film 112B in another surface side.In this case, one can be entered Step improves environment resistant.In addition, transparent conductive oxide film 112A can be by mutually different with transparent conductive oxide film 112B Composition transparent conductive oxide constitute.Furthermore, it is possible to Ag films and transparent conductive oxide film layer are stacked as into any amount, example Such as more than four layers.
Embodiment
Confirm that the result of experiment is illustrated obtained from confirming on the effect to stacked film of the invention.
(embodiment 1)
Made as follows shown in table 1 composition (transparent conductive oxide film, Ag films, transparent conductive oxide film this Three-decker) stacked film.
When Ag films are formed, the sputtering target of the composition corresponding with Ag films shown in table 1 is prepared.In addition, target size is set It is diameter phi:4 inches × thickness t:6mm.
Also, transparent conductive oxide film has used following transparent conductive oxide sputtering target.
ITO:The oxidate sintered body target of the In and Sn of Sn of the summation comprising 10 atom % relative to In and Sn.
IZO:The oxidate sintered body target of the In and Zn of Zn of the summation comprising 30 atom % relative to In and Zn.
ZTO:The oxidate sintered body target of the Zn and Sn of Sn of the summation comprising 50 atom % relative to Zn and Sn.
AZO:The oxidate sintered body target of the Zn and Al of Al of the summation comprising 2 atom % relative to Zn and Al.
AZTO:Al, the oxygen of Zn, Al and Sn of the Sn of 10 atom %s of the summation comprising 2 atom % relative to Zn, Al and Sn Compound sintered body target.
In addition, " crystalloid " is to be spread out by X-ray as shown in (a) of Fig. 3 in transparent conductive oxide film in table 1 Penetrate the situation for determining and observing clearly peak crystallization.Also, " noncrystalline " is to pass through X-ray diffraction as shown in (b) of Fig. 3 Determine the situation for not observing clearly peak crystallization.
Here, the membrance casting condition of transparent conductive oxide film is as follows.
Substrate:Glass substrate ((コ ー ニ Application グ societies of Corning Incorporated) EAGLE XG, thickness 0.7mm processed for having cleaned)
Use gas:Ar+2 volume % oxygen
Air pressure:0.67Pa
Sputtering power:Direct current 300W
The distance between target and substrate:70mm
Also, the membrance casting condition of Ag films is as follows.
Final vacuum:5×10-5Below Pa
Use gas:Ar
Air pressure:0.67Pa
Sputtering power:Direct current 200W
The distance between target and substrate:70mm
To resulting stacked film, etching process has been carried out as follows.
First, resist liquid (Tokyo Ying Hua Co., Ltd. (East JingApplied Hua Co., Ltd.) OFPR- processed is added dropwise on stacked film 8600), and spin-coating erosion resistant agent, and in an atmosphere so that the condition of 110 DEG C × 90 seconds carries out preliminary drying resist film is formed.
Then, it is respectively 30 μm of Wiring pattern wiring width and patch bay to be exposed to resist film by exposure machine. The stacked film that will be exposed at room temperature impregnated in developer solution (Tokyo should change Co. Ltd. system NMD-W) 100 seconds and eliminate exposure The resist film in light portion.Afterwards, rear baking was carried out with the condition of 150 DEG C × 300 seconds in an atmosphere.
Then, in No.1-7, (concentration of oxalic acid is the oxalic acid water of 4 mass % to impregnated in the oxalic acid etching solution of 40 DEG C of temperature Solution) 100~400 seconds and etched.
In No.8-14, the nitration mixture (Northeast chemistry strain formula being made up of phosphoric acid, nitric acid and acetic acid of 40 DEG C of temperature is impregnated in (Off East KCCs of commercial firm) ITO -02 processed) 30~80 seconds and etched.
In No.15~21, etched with two stages.First, impregnated in the Northeast chemistry strain formula of 40 DEG C of temperature In commercial firm ITO-07N 30 seconds and carried out the etching of transparent conductive oxide film.Afterwards, impregnated in the Northeast of 40 DEG C of temperature In KCC SEA-5N 10 seconds and carried out the etching of Ag films.
It has been made as above after etching process, the ultrasonic wave that impregnated in pure water and implement a minute is cleaned, and is obtained The electrically conducting transparent distribution of No.1-21.
On the electrically conducting transparent distribution for being obtained, in order to observe distribution section and substrate of riving, seen using electron microscope Its section is examined.
Also, transparent conductive oxide film and the respective etching of Ag films for being confirmed by electron microscope observation The film of end, the residual quantity of the position on parallel direction is evaluated as " overetch amount ".Evaluation result is shown in table 1。
In the No.8-14 etched in the lump using the nitration mixture being made up of phosphoric acid, nitric acid and acetic acid, erosion was confirmed Quarter measures larger.
Also, in No.15~21 for implementing etching with two stages, and etched in the lump using nitration mixture No.8~14 are compared and are suppressed, but overetch amount has exceeded 1 μm.
In contrast, in No.1~7 etched in the lump using oxalic acid etching solution, overetch amount all suppresses Less than 1 μm.
Confirmed according to case above, having obtained the crossing for Ag films relative to transparent conductive oxide film according to the present invention loses Quarter measures the electrically conducting transparent distribution for less than 1 μm.
(embodiment 2)
Then, by the method same with No.1~7 of embodiment 1, structure (the electrically conducting transparent oxygen shown in table 2 has been manufactured Compound film, Ag films, transparent conductive oxide film this three-decker) electrically conducting transparent distribution.
On resulting electrically conducting transparent distribution, have rated could be etched using oxalic acid etching solution.In addition, to etching Electrically conducting transparent distribution afterwards carries out observation by light microscope and SEM observations, will not confirm residue and overetch amount is 1 μm Following situation is evaluated as " A ", and the results verification that will can be etched but be observed by observation by light microscope and SEM is to etching The situation of residue is evaluated as " B ", it is impossible to which three layers of (transparent conductive oxide film, Ag films, transparent conductive oxide film) one are gone forward side by side The situation of situation or overetch amount more than 1 μm of row etching is evaluated as " C ".Evaluation result is shown in table 2.
[table 2]
By the thickness of Ag films be formed as the No.31 thicker than the scope of the present invention, 32,41,42,51,52,61,62,71, 72nd, in 81,82, it is impossible to fully etch Ag films.
On the other hand, the thickness of Ag films is being set in No.33~35,43~45,53~55,63 of the scope of the present invention In~65,73~75,83~85, even if in the case of using oxalic acid etching solution, it is also possible to fully etch Ag films.
Experimental result according to more than is confirmed, and is located in the scope of below 15nm by by the thickness of Ag films, can be made It is etched with oxalic acid etching solution.
(embodiment 3)
Then, by the method same with No.1~7 of embodiment 1, structure (the electrically conducting transparent oxygen shown in table 3 has been manufactured Compound film, Ag films, transparent conductive oxide film this three-decker) electrically conducting transparent distribution.
On resulting electrically conducting transparent distribution, have rated could be etched using oxalic acid etching solution.Evaluation content with Embodiment 2 is identical.Evaluation result is shown in table 3.
[table 3]
Confirmed in the case where oxalic acid aqueous solution is used as etching solution, form crystalloid ito film be used as it is transparent In the No.92 of conductive oxide film, compared with the No.91 of amorphous ito film is formd, the etching based on oxalic acid aqueous solution It is poor.In addition, in the case where the mixed liquor of oxalic acid aqueous solution and nitric acid is used as etching solution, even if foring crystalloid Ito film is used as in the No.93 of transparent conductive oxide film, and etching is also good.
Experimental result according to more than is confirmed, in the case where oxalic acid aqueous solution is used as etching solution, preferably clear Conductive oxide film is amorphous film.
(embodiment 4)
Then, by the method same with No.1~7 of embodiment 1, the electrically conducting transparent for having manufactured the structure shown in table 4 is matched somebody with somebody Line.In addition, in the embodiment 4, being set to form transparent conductive oxide film on the glass substrate and forming Ag films above Double-decker.
In No.101~117, after the etching process based on oxalic acid etching solution, residue and overetch are not confirmed Measure all less than 1 μm.
On resulting electrically conducting transparent distribution, sheet resistance value is determined.For the measure of sheet resistance value, using table Surface resistance analyzer (oiling company of Mitsubishi (oiling society of Mitsubishi) system, Loresta AP MCP-T400) is carried out by four probe method Determine.Evaluation result is shown in table 4.
[table 4]
In No.111~117 of the total amount more than 10 atom % for constituting the addition element of Ag alloys of Ag films, surface Resistance value is significantly more than 40 Ω/sq.On the other hand, the total amount in the addition element of the Ag alloys for constituting Ag films is 10 atom % In following No.101~108, sheet resistance value is 40 Ω/below sq.
Experimental result according to more than is confirmed, and especially, in order to obtain low-resistance electrically conducting transparent distribution, will preferably be constituted The total amount of the addition element of the Ag alloys of Ag films is defined as below 10 atom %.
Symbol description
10th, 110- electrically conducting transparents distribution, 11,111-Ag films, 12,112A, 112B- transparent conductive oxide film.

Claims (6)

1. a kind of electrically conducting transparent distribution, it has the Ag films being made up of Ag or Ag alloys and the electrically conducting transparent being laminated on the Ag films Oxidation film, and Wiring pattern is formed with by etching process, the electrically conducting transparent distribution is characterised by,
The thickness of the Ag films in the scope of below 15nm,
The Ag films are less than 1 μm relative to the overetch amount of the transparent conductive oxide film.
2. electrically conducting transparent distribution according to claim 1, it is characterised in that
The Ag films are made up of the Ag alloys for constituting as follows:To add up to it is more than 0.05 atom % and below 10.0 atom % model Enclose and be used as addition element comprising any one in Sn, In, Mg, Ti or two or more elements, and remainder by Ag and Inevitable impurity is constituted.
3. electrically conducting transparent distribution according to claim 2, it is characterised in that
The Ag films are made up of the Ag alloys for constituting as follows:Also include the Sb and more than 0.1 atom % of more than 0.01 atom % Any one or two kinds in Cu are used as addition element, and all addition element are added up to below 10.0 atom %, and Remainder is made up of Ag and inevitable impurity.
4. electrically conducting transparent distribution according to any one of claim 1 to 3, it is characterised in that
The transparent conductive oxide film is amorphous film.
5. a kind of manufacture method of electrically conducting transparent distribution, the electrically conducting transparent distribution have the Ag films that are made up of Ag or Ag alloys and The transparent conductive oxide film on the Ag films is laminated in, and is formed with Wiring pattern, the manufacture method of the electrically conducting transparent distribution It is characterised by,
The thickness of the Ag films is located in the scope of below 15nm,
With etching process operation, treatment is etched to the stacked film with the Ag films and the transparent conductive oxide film And Wiring pattern is formed,
In the etching process operation, the transparent conductive oxide film and the Ag films are carried out in the lump using oxalic acid etching solution molten Solution.
6. the manufacture method of electrically conducting transparent distribution according to claim 5, it is characterised in that
The oxalic acid etching solution is oxalic acid aqueous solution of the concentration of oxalic acid in the scope of more than 3 mass % and below 7 mass %.
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