US20170175271A1 - Polymer composition, ink composition and method for selectively metallizing insulating substrate - Google Patents

Polymer composition, ink composition and method for selectively metallizing insulating substrate Download PDF

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Publication number
US20170175271A1
US20170175271A1 US15/448,066 US201715448066A US2017175271A1 US 20170175271 A1 US20170175271 A1 US 20170175271A1 US 201715448066 A US201715448066 A US 201715448066A US 2017175271 A1 US2017175271 A1 US 2017175271A1
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Prior art keywords
tin oxide
doped tin
coordinate
value
polymer
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US15/448,066
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English (en)
Inventor
Wei Zhou
Bifeng MAO
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BYD Co Ltd
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BYD Co Ltd
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Publication date
Priority claimed from CN201410449096.XA external-priority patent/CN104275886B/zh
Priority claimed from CN201410448481.2A external-priority patent/CN104311873B/zh
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Assigned to BYD COMPANY LIMITED reassignment BYD COMPANY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAO, BIFENG, ZHOU, WEI
Publication of US20170175271A1 publication Critical patent/US20170175271A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1603—Process or apparatus coating on selected surface areas
    • C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
    • C23C18/1612—Process or apparatus coating on selected surface areas by direct patterning through irradiation means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20—Vanadium, niobium or tantalum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
    • B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0072—Preparation of particles, e.g. dispersion of droplets in an oil bath
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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    • C09D11/32—Inkjet printing inks characterised by colouring agents
    • C09D11/322—Pigment inks
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    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
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    • C09D11/52—Electrically conductive inks
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    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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    • C09D169/00—Coating compositions based on polycarbonates; Coating compositions based on derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D177/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
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    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
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    • C23C18/2006—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30
    • C23C18/2046—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment
    • C23C18/2053—Pretreatment of the material to be coated of organic surfaces, e.g. resins by other methods than those of C23C18/22 - C23C18/30 by chemical pretreatment only one step pretreatment
    • C23C18/2066—Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/38—Coating with copper
    • C23C18/40—Coating with copper using reducing agents
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
    • H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
    • H05K3/182—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
    • H05K3/181—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating
    • H05K3/182—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method
    • H05K3/185—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method by making a catalytic pattern by photo-imaging
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2231—Oxides; Hydroxides of metals of tin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1603—Process or apparatus coating on selected surface areas
    • C23C18/1607—Process or apparatus coating on selected surface areas by direct patterning
    • C23C18/1608—Process or apparatus coating on selected surface areas by direct patterning from pretreatment step, i.e. selective pre-treatment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0203—Fillers and particles
    • H05K2201/0206—Materials
    • H05K2201/0236—Plating catalyst as filler in insulating material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
    • H05K2203/0703—Plating
    • H05K2203/0709—Catalytic ink or adhesive for electroless plating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/10—Using electric, magnetic and electromagnetic fields; Using laser light
    • H05K2203/107—Using laser light

Definitions

  • Embodiments of the disclosure generally relate to a material field, and particularly to selective metallization via chemical plating, and more particularly to use of a doped tin oxide as a chemical plating promoter.
  • Providing a metal layer on a selected area of a surface of an insulating substrate such as a plastic in order to form a passage for transmitting electro-magnetic signals is widely applied in the field of automobile, computer, communications, and so on.
  • the present disclosure is directed to solve at least one problem existing in the art, for example, the shortcomings of low plating speed and leakage of plating involved in some conventional methods for selective metallization on a surface of the insulating substrate such as plastic to form a metal layer via chemical plating, which use metal oxides with light color as chemical plating promoters.
  • Embodiments of one aspect of the present disclosure provide a doped tin oxide with niobium as doping element that has a better ability to promote chemical plating.
  • a doped tin oxide with niobium as doping element that has a better ability to promote chemical plating.
  • a higher plating speed may be obtained and a continuous metal layer may be formed together with enhanced adhesivity between the metal layer and the insulating substrate.
  • presetting a doped tin oxide with niobium as doping element in an insulating substrate such as polymer does not or substantially does not interfere with the color of the insulating substrate.
  • Embodiments of a first aspect of the present disclosure provide use of a doped tin oxide as a chemical plating promoter in selectively metallizing a surface of an insulating substrate.
  • a doping element of the doped tin oxide includes niobium, and the doped tin oxide has a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space.
  • the doped tin oxide has a reflectivity of no more than 60% to a light with a wavelength of about 1064 nm.
  • the doped tin oxide has a coordinate L* value of about 80 to about 90, a coordinate a value of about ⁇ 5 to about 2, and a coordinate b value of about 2 to about 4 in a CIELab color space.
  • the content of the tin oxide is about 70 wt % to about 99.9 wt %, and the content of the niobium is about 0.1 wt % to about 30 wt % calculated as Nb 2 O 5 .
  • Embodiments of a second aspect of the present disclosure provide a polymer composition.
  • the polymer composition includes a polymer and a doped tin oxide. Based on 100 weight parts of the polymer, the content of the doped tin oxide is about 1 to about 40 weight parts.
  • a doping element of the doped tin oxide includes niobium, and the doped tin oxide has a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space.
  • the content of the doped tin oxide is about 1 to about 5 weight parts.
  • the doped tin oxide has a reflectivity of no more than 60% to a light with a wavelength of about 1064 nm.
  • the doped tin oxide has a coordinate L* value of about 80 to about 90, a coordinate a value of about ⁇ 5 to about 2, and a coordinate b value of about 2 to about 4 in a CIELab color space.
  • the content of the tin oxide is about 70 wt % to about 99.9 wt %, and the content of the niobium is about 0.1 wt % to about 30 wt % calculated as Nb 2 O 5 .
  • Embodiments of a third aspect of the present disclosure provide a polymer molded body. At least a part of a surface of the polymer molded body is formed by the polymer composition as mentioned above.
  • the polymer molded body is substantially formed by the polymer composition as mentioned above.
  • Embodiments of a fourth aspect of the present disclosure provide use of the polymer composition or the polymer molded body as mentioned above in selectively metallizing a surface of a polymer substrate.
  • Embodiments of a fifth aspect of the present disclosure provide an ink composition.
  • the ink composition includes a binder and a doped tin oxide.
  • a doping element of the doped tin oxide includes niobium, and the doped tin oxide has a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space.
  • the amount of the binder is about 1 to about 60 weight parts.
  • the binder includes at least one selected from a group consisting of cellulose acetate, polyacrylate resin, ethylene-vinyl acetate copolymer, polyvinyl alcohol, polyvinyl acetal, polyvinyl acetate, polyvinyl pyrrolidone and poly phosphonic acid.
  • the doped tin oxide has a reflectivity of no more than 60% to a light with a wavelength of about 1064 nm.
  • the doped tin oxide has a coordinate L* value of about 80 to about 90, a coordinate a value of about ⁇ 5 to about 2, and a coordinate b value of about 2 to about 4 in a CIELab color space.
  • the content of the tin oxide is about 70 wt % to about 99.9 wt %, and the content of the niobium is about 0.1 wt % to about 30 wt % calculated as Nb 2 O 5 .
  • Embodiments of a sixth aspect of the present disclosure provide a method for selectively metallizing a surface of an insulating substrate.
  • the method includes forming an ink layer on the surface of the insulating substrate by providing the ink composition as mentioned above on the surface of the insulating substrate; and forming at least one metal layer on the ink layer by chemical plating.
  • providing the ink composition further including mixing raw materials of the ink composition to obtain an uniform mixture.
  • the method further includes gasifying at least a part of a surface of the ink layer by irradiating the surface of the ink layer with an energy source prior to the chemical plating.
  • the energy source is a laser.
  • Embodiments of a seventh aspect of the present disclosure provide a method for selectively metallizing a surface of an insulating substrate including using a doped tin oxide as a chemical plating promoter.
  • a doping element of the doped tin oxide includes niobium, and the doped tin oxide has a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space.
  • Embodiments of an eighth aspect of the present disclosure provide a method for selectively metallizing a surface of a polymer substrate, including using the polymer composition or the polymer molded body as mentioned above.
  • the doped tin oxide containing niobium as doping element as a chemical plating promoter in a method for selectively metallizing a surface of an insulating substrate
  • the doped tin oxide with light color preset in the insulating substrate such as plastic, having a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space, will not or substantially will not significantly interfere with the color of the insulating substrate.
  • the doped tin oxide as disclosed in the present disclosure has a strong ability to promote chemical plating without reducing the metal element thereof to pure metal.
  • the doped tin oxide may be used as a chemical plating promoter with a flexible usage scope.
  • the doped tin oxide may not only be preset in an insulating substrate such as polymer, but may also be directly coated or printed on a surface of the substrate as an ink layer.
  • a higher plating speed may be obtained and a continuous metal layer may be formed with an enhanced adhesion layer between the metal layer and the insulating substrate, with both the production efficiency and the quality of the plating parts improved.
  • a doped tin oxide as a chemical plating promoter in selectively metallizing a surface of an insulating substrate is provided.
  • chemical plating promoter used herein is intended to mean a material which may promote a substrate without original ability to be chemically plated to realize a chemical plating and obtain a continuous metal layer formed on the surface thereof.
  • the doped tin oxide includes niobium as doping element thereof.
  • the content of the tin oxide is about 70 wt % to about 99.9 wt %.
  • the content of the tin oxide is about 90 wt % to about 96 wt %.
  • the content of the niobium is about 0.1 wt % to about 30 wt % calculated as Nb 2 O 5 .
  • the content of the niobium is about 1 wt % to about 20 wt % calculated as Nb 2 O 5 . In some embodiments, based on the total weight of the doped tin oxide, the content of the niobium is about 4 wt % to about 10 wt % calculated as Nb 2 O 5 .
  • the composition of the doped tin oxide can be determined by any conventional analysis and test methods, for example, it can be tested by inductively coupled plasma-atomic emission spectrometry (ICP-AES), or determined by the amount of raw materials used in a preparation process thereof.
  • the doped tin oxide may have an average particle size of about 10 nm to about 10 ⁇ m. In some embodiments, the doped tin oxide may have an average particle size of about 50 nm to about 5 ⁇ m. In some embodiments, the doped tin oxide may have an average particle size of about 80 nm to about 2.5 ⁇ m. In some embodiments, the particle size of the doped tin oxide may be selected properly according to practical requirements. For example, when presetting it in the substrate such as polymer, the average particle size of the doped tin oxide may be preferably about 100 nm to about 10 ⁇ m, more preferably about 500 nm to about 2.5 ⁇ m.
  • the average particle size of the doped tin oxide may be preferably about 1 nm to about 800 nm, more preferably about 10 nm to about 500 nm.
  • the average particle size may be determined by any conventional method, for example, measured by a laser particle analyzer. According to the present disclosure, the definitions of the numerical ranges always include the endpoint value thereof unless otherwise specified.
  • the doped tin oxide according to embodiments of the present disclosure has a light color, and has a CIELab color value L* of about 70 to about 100, a CIELab color value a of about ⁇ 5 to about 5, and a CIELab color value b of about ⁇ 5 to about 5.
  • the doped tin oxide may have a coordinate L* value of about 70 to about 100, a coordinate a value of about ⁇ 5 to about 5, and a coordinate b value of about ⁇ 5 to about 5 in a CIELab color space.
  • the CIELab color value L* of the dope tin oxide is about 80 to about 90
  • the CIELab color value a is about ⁇ 5 to about 2
  • the CIELab color value b is about 2 to about 4.
  • the doped tin oxide may have a coordinate L* value of about 80 to about 90, a coordinate a value of about ⁇ 5 to about 2, and a coordinate b value of about 2 to about 4 in a CIELab color space.
  • the doped tin oxide with the above-mentioned CIELab color value ranges may show both a light color and a good ability of promoting chemical plating, and can form a metal layer on the substrate with high adhesion force at high plating speed during the chemical plating process.
  • the doped tin oxide may have a high absorption power to light, and shows a light reflectivity of no more than 60% at a wavelength of 1064 nm, and even no more than 40%, for example, about 20% to about 30%.
  • the doped tin oxide has a reflectivity of no more than 60% to a light with a wavelength of about 1064 nm.
  • the light reflectivity of the doped tin oxide may be tested by a traditional method, an example thereof is described in GJB 5023.1-2003.
  • the doped tin oxide may be prepared by steps of: providing a powder mixture including a tin oxide and at least one compound containing a doping element including niobium; and then sintering the powder mixture in an oxidizing atmosphere.
  • the obtained compound includes at least one of an oxide of the doping element and a precursor capable of forming the oxide of the doping element through sintering.
  • the oxide of the doping element such as the oxide of niobium, may be Nb 2 O 5 .
  • the precursor used to form the oxide of the doping element under the sintering may be any compounds capable forming the oxide of the doping element, such as hydroxides (e.g.
  • niobium hydroxide niobium hydroxide
  • a gel e.g. niobium-containing gel
  • the powder mixture is prepared by methods of semi-dry grinding or wet grinding as described below, the precursor may be a compound insoluble in the dispersant used in the methods of the semi-dry grinding or wet grinding.
  • the contents of the tin oxide and the compound in the powder mixture can be selected according to the desired doping element content in the doped tin oxide.
  • the composition of the powder mixture may be adjusted to produce the following contents: the content of the tin oxide is about 70 wt % to about 99.9 wt %, preferably about 90 wt % to about 96 wt %; and the content of the niobium is about 0.1 wt % to about 30 wt % calculated as Nb 2 O 5 , preferably about 1 wt % to about 20 wt %, more preferably about 4 wt % to about 10 wt %, based on the total weight of the doped tin oxide intended.
  • the powders may be obtained by grinding the tin oxide and the metal compound containing the doping element.
  • the grinding may be performed by a dry grinding process, a wet grinding process, or a semi-dry grinding process.
  • the semi-dry grinding process and the wet grinding process may be carried out using a dispersant.
  • the dispersant may be any normally used dispersant in a conventional grinding process.
  • the dispersant may be water and/or C 1 -C 5 alcohol, for example, ethanol.
  • the content of the dispersant may include any content known in the art without special limit.
  • the powders may be obtained by a wet grinding process or a semi-dry grinding process.
  • the wet grinding process and the semi-dry grinding process may further include a drying step.
  • the drying may be carried out by a normal drying process. In some embodiments, the drying is carried out at a temperature ranging from about 40° C. to about 120° C. In some embodiments, the drying may be carried out under an atmosphere containing oxygen, or under a non-reactive atmosphere.
  • the atmosphere containing oxygen may be air or a combination of oxygen and a non-reactive gas.
  • the non-reactive gas may refer to any gas which may not react chemically with the components of the powders or the prepared metal compound.
  • the non-reactive gas may be those selected from group 0 of the periodic table or nitrogen. In some embodiment, the non-reactive gas may be argon.
  • the size of the powder mixture in the present disclosure there is no special limit to the size of the powder mixture in the present disclosure, which may be chosen based on actual practice.
  • the powder mixture has an average particle size of about 50 nm to about 10 ⁇ m. In some embodiments, the powder mixture has an average particle size of about 500 nm to about 5 ⁇ m.
  • the sintering may be conducted at a temperature ranging from about 500° C. to about 1800° C. In some embodiments, the sintering may be conducted at a temperature ranging from about 600° C. to about 1500° C. In some embodiments, the sintering may be conducted at a temperature not higher than about 1300° C., thus obtained doped tin oxide has a light color similar to the powder mixture, i.e. raw materials. From the viewpoint of further improving the promoting power of the doped tin oxide, the sintering may be conducted preferably at a temperature of higher than about 800° C., more preferably higher than about 1000° C. When the sintering temperature is about 1000° C.
  • the obtained doped tin oxide has a light color similar to the powder mixture, and shows a good ability of promoting chemical plating.
  • the condition for sintering may be selected according to the sintering temperature, and the sintering may be performed for a time period ranging from about 1 hour to about 30 hours, preferably about 4 hours to about 10 hours.
  • the sintering may be carried out under an oxidizing atmosphere.
  • the oxidizing atmosphere is generally an atmosphere containing oxygen.
  • the atmosphere containing oxygen may be pure oxygen atmosphere.
  • the atmosphere containing oxygen may be a combination of oxygen and a non-reactive gas.
  • the non-reactive gas may refer to any gas which may not react chemically with the raw materials and the products of the sintering process.
  • the non-reactive gas may be those selected from group 0 of the periodic table or nitrogen.
  • the volume amount of oxygen is preferably more than about 70 vol %.
  • the atmosphere containing oxygen may be air.
  • the method further includes a step of grinding a solid product obtained from the sintering step in order to provide the final product with more desired properties.
  • the particle size of a grinded product obtained from the grinding step may have an average particle size ranging from about 10 nm to about 10 ⁇ m.
  • the grinded product may have an average particle size ranging from about 50 nm to about 5 ⁇ m.
  • the grinded product may have an average particle size ranging from about 80 nm to about 2.5 ⁇ m.
  • the further grinding may be performed by at least one process selected from a group including: dry grinding process, wet grinding process and semi-dry grinding process, which may include methods that are known in the art as described above.
  • the semi-dry grinding process and the wet grinding process may be carried out using a dispersant.
  • the dispersant may be any normally used dispersant in a conventional grinding process.
  • the dispersant may be water and/or C 1 -C 5 alcohol, for example, ethanol.
  • the content of the dispersant may include any content known in the art, without special limit.
  • the application mode of the doped tin oxide used as a chemical plating promoter in a method for selectively metallizing a surface of an insulating substrate can be selected according to the particular application situation.
  • two example embodiments are provided and it would be appreciated by those skilled in the art that the method mode of the doped tin oxide enumerated below cannot be limited to these two embodiments.
  • the doped tin oxide may be dispersed in an insulating substrate (such as a polymer substrate), and with an energy beam irradiation to expose the doped tin oxide, then electroless plating is carried out.
  • the doped tin oxide may be coated on the insulating substrate surface as an ink layer, followed by electroless plating.
  • a polymer composition includes a polymer and the doped tin oxide mentioned above.
  • the doped tin oxide and its preparation may be the same as what described above.
  • the content of the doped tin oxide is about 1 to about 40 weight parts. In some embodiments, based on 100 weight parts of the polymer, the content of the doped tin oxide is about 1 to about 30 weight parts. In some embodiments, based on 100 weight parts of the polymer, the content of the doped tin oxide is about 1 to about 20 weight parts. In some embodiments, based on 100 weight parts of the polymer, the content of the doped tin oxide is about 1 to about 10 weight parts.
  • the content of the doped tin oxide may be about 1 to about 5 weight parts, or even about 1 to about 3 weight parts
  • the polymer molded body formed by the polymer composition is still capable of electroless plating after the energy beam irradiation for peeling the polymer, and can obtain a higher plating speed, forming a complete continuous metal layer with a high adhesion to the substrate.
  • the polymer molded body may also have excellent mechanical properties.
  • the polymer may be selected according to practical requirements.
  • the polymer may be a thermoplastic polymer or a thermosetting polymer.
  • the polymer composition may have a base polymer that may be at least one selected from a group including: plastic, rubber and fiber.
  • the polymer may be at least one selected from a group including: polyolefin, such as polystyrene, polypropylene, poly(methyl methacrylate) and poly(acrylonitrile-butadiene-styrene); polycarbonate; polyester, such as poly(cyclohexylene dimethylene terephthalate), poly(diallyl isophthalate), poly(diallyl terephthalate), poly(butylene naphthalate), poly(ethylene terephthalate) and poly(butylene terephthalate); polyamide, such as poly(hexamethylene adipamide), poly(hexamethylene azelamide), poly(hexamethylene succinamide), poly(hexamethylene lauramide), poly(hexamethylene sebacamide), poly(decamethylene sebacamide), polyundecanamide, poly(lauramide), poly(octanamide), poly(9-amino nonanoic acid), polycaprolactam
  • polyolefin such as polys
  • the polymer composition may further contain at least one additive.
  • the additive may be, for example, filler, antioxidant, light stabilizer and lubricant and so on.
  • the performance and property of the polymer molded body may be improved, and the processing performance of the polymer composition may be improved.
  • the additive may be selected according to, for example, practical requirements.
  • the filler used as the additive to the polymer composition may be any filler which is non-reactive under the effect of laser (e.g., either physically or chemically).
  • the filler may be at least one selected from talc and/or calcium carbonate.
  • the filler may be glass fiber.
  • the thickness of the removed substrate in other words, the distance from the top surface of the polymer molded body to the exposed doped tin oxide
  • the thickness of the removed substrate may be significantly increased, which may facilitate the deposition of metal onto the doped tin oxide during the following chemical plating process.
  • the filler may be any conventional inorganic filler which may act with the effect of the energy source, such as the laser.
  • the filler may also be selected from micro glass bead, calcium sulfate, barium sulfate, titanium dioxide, pearl powder, wollastonite, diatomite, caoline, coal fines, pot clay, mica, oil shale ash, aluminum silicate, alumina, silica, talc and zinc oxide.
  • the antioxidant used as the additive to the polymer molded body formed by the polymer composition may be any conventional antioxidant in the related art.
  • the antioxidant may contain a primary antioxidant and a secondary antioxidant.
  • the ratio between the primary antioxidant and the secondary antioxidant may be appropriately selected according to, for example, the type of the antioxidants.
  • the weight ratio between the primary antioxidant and the secondary antioxidant may be about 1:1-4.
  • the primary antioxidant may be a hindered phenol antioxidant.
  • the primary antioxidant may be antioxidant 1098 or antioxidant 1010, in which the antioxidant 1098 mainly contains N,N′-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexane diamine and the antioxidant 1010 mainly contains tetra[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol.
  • the secondary antioxidant may be a phosphite ester antioxidant.
  • the secondary antioxidant may be antioxidant 168, which mainly contains tri(2,4-di-tert-butyl-phenyl)phosphorite.
  • the light stabilizer used as the additive to the polymer article may be of the hindered amine type.
  • the light stabilizer may be bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate.
  • the light stabilizer may be any known ones in the art, without special limit in the present disclosure.
  • the lubricant may be at least one selected from a group including: ethylene/vinyl acetate copolymer (EVA wax), polyethylene (PE wax) and stearate.
  • EVA wax ethylene/vinyl acetate copolymer
  • PE wax polyethylene
  • stearate stearate
  • the content of the additive may be appropriately selected according to functions and types of the additives.
  • the content of the filler may range from 1 weight part to 40 weight parts
  • the content of the antioxidant may range from about 0.1 weight parts to about 10 weight parts
  • the content of the light stabilizer may range from about 0.1 weight parts to about 10 weight parts
  • the content of the lubricant may range from about 0.1 weight parts to about 10 weight parts.
  • a polymer molded body is provided. At least a part of a surface of the polymer molded body is formed by the polymer composition as mentioned above.
  • the surface of the polymer body refers to all exposed surface, including not only the outer surface, such as above, bottom, side, front, rear, left and right surface, but also an inner surface of molded body formed by machining (for example, the inner surface of a hole drilled in the molded body).
  • the doped tin oxide in the polymer composition used to form the polymer molded body has a light color, and has an ability to promote chemical plating. So the surface of the polymer molded body required to form a metal layer via chemical plating is formed by the polymer composition, and thus the surface formed by above-mentioned polymer composition can form a metal layer pattern via chemical plating after the energy beam irradiation for peeling the polymer.
  • only a part of a surface of the polymer molded body may be formed by the polymer composition.
  • the whole polymer molded body may be formed by the polymer composition as mentioned above, i.e., the entire polymer molded body is formed by the polymer composition.
  • only a surface or a part of a surface of the polymer molded body may be formed by the polymer composition if the thickness thereof is very large.
  • the polymer molded body may be integrally formed by the polymer composition if the thickness is not very large.
  • the size of the polymer molded body may be selected properly according to intended use of the case, without special limit in the present disclosure.
  • the polymer molded body can be of any shape according to practical use.
  • the molding step may be performed by any conventional molding process known in the art, without special limit in the present disclosure. In some embodiments, the molding step is performed by injection molding. In another embodiment, the molding step is performed by extrusion molding.
  • a fourth aspect of the present disclosure use of the polymer composition or the polymer molded body mentioned above is provided, with the polymer composition or the polymer molded body being used in a method for selectively metallizing a surface of a polymer substrate.
  • the polymer composition is used to form a polymeric substrate or a surface of the polymer substrate, or the polymer molded body is used as the polymer substrate. Then chemical plating is carried out after gasifying a part of a surface of the polymer substrate by irradiating the surface with an energy source, thereby achieving selective metallization on the surface of the polymer substrate.
  • the energy source may be at least one selected from a group including: laser, electron beam and ion beam.
  • the energy source is a laser. The energy provided by the laser is high enough to cause the polymer substrate in the irradiated area of the surface thereof gasified and the doped tin oxide in the irradiated area is exposed.
  • the irradiating step may be performed by using a laser, and the laser may have a wavelength of 157-10600 nm and a power of 1-100 W.
  • the doped tin oxide has excellent absorption capability to energy provided by the energy source, and thus the polymer substrate in the predetermined part may be removed and the doped tin oxide in the predetermined part may be exposed, even irradiated with the energy source which provides relatively lower energy.
  • the laser may have a wavelength of 1064-10600 nm and a power of 3-50 W. In another embodiment, the laser may have a wavelength of 1064 nm and a power of 3-40 W. In a further embodiment, the laser may have a wavelength of 1064 nm and a power of 5-10 W.
  • the predetermined part of the surface of the polymer substrate may form a pattern, and then the metal layer formed on the predetermined part may form a metal pattern on the polymer substrate. With the laser, the precision of the metal pattern may be improved.
  • the irradiating step may be performed by using an electron beam, and the electron beam may have a power density of 10-10 11 W/cm 2 .
  • the irradiating step may be performed by using an ion beam, and the ion beam may have an energy of 10-10 6 eV.
  • the chemical plating may be carried out with the following steps.
  • the polymer substrate subjected to the irradiating is immersed in a solution of copper (referred to as “Cu solution”).
  • the Cu solution may contain a Cu salt.
  • the Cu solution may further contain a reducing agent.
  • the Cu solution may have a pH ranging from about 12 to about 13.
  • the reducing agent may reduce the Cu ions in the Cu salt into Cu metal.
  • the reducing agent may be at least one selected from a group including: glyoxylic acid, diamide, and sodium phosphorate.
  • the thickness of the metal layer formed by chemical plating may be selected based on practical requirements, without special limit. In some embodiments, the thickness of the metal layer is about 0.1 ⁇ m to about 10 ⁇ m.
  • the shape of the metal layer may be selected based on practical requirements. For example, if the polymer article obtained after the chemical plating is used to prepare a circuit board, the metal layer may have a metal layer pattern.
  • the method may further include a step of electroplating or chemical plating.
  • the electroplating or chemical plating may be performed for at least one time, so that additional metal layers, either of the same metal as or of different metals from the prior metal layers, may be formed on the prior metal layers.
  • a Cu layer is formed on the surface of the polymer substrate in the first chemical plating step, then a Ni layer is formed on the Cu layer in the following electroplating or chemical plating. With the additional Ni layer, oxidation of the Cu layer may be prevented.
  • an ink composition includes a binder and the doped tin oxide as mentioned above.
  • the doped tin oxide contains niobium as its doping element, and has a CIELab color value L* of about 70 to about 100, a CIELab color value a of about ⁇ 5 to about 5, and a CIELab color value b of about ⁇ 5 to about 5.
  • the doped tin oxide has an average particle size of about 1 nm to about 800 nm, preferably about 10 nm to about 500 nm, more preferably about 50 nm to about 300 nm.
  • the binder when the ink composition is applied on a surface of an insulating substrate, the binder may contribute to the uniform dispersion of the doped tin oxide on the surface of the insulating substrate.
  • an ink layer which may contain the binder and the ink composition, may be formed on the surface of the insulating substrate.
  • the ink layer with the binder material can have certain required strength which allows strong adhesion between the ink layer and the insulating substrate.
  • the binder is an organic binder.
  • the binder may be at least one selected from a group including: cellulose acetate, polyacrylate resin, ethylene-vinyl acetate copolymer (referred EVA binder), polyvinyl alcohol, polyvinyl acetal, polyvinyl acetate, polyvinyl pyrrolidone, and polyphosphonic acid.
  • the binder is at least one selected from a group including: butyl acetate cellulose of CAB series commercially available from Eastman Chemical Company, US, such as butyl acetate cellulose No. CAB381-0.5, butyl acetate cellulose No. CAB381-20, butyl acetate cellulose No. CAB551-0.2 and butyl acetate cellulose No. CAB381-2; and polyvinyl butyral of Mowital series commercially available from Kuraray Company, JP, such as polyvinyl butyral No. Mowital B 60T, polyvinyl butyral No. Mowital B 75H and polyvinyl butyral No. Mowital B 60H.
  • a commercially available binder may be used.
  • the binder is at least one selected from a group including: butyl acetate cellulose of CAB series commercially available from Eastman Chemical Company, US, such as butyl acetate cellulose No. CAB381-0.5, butyl acetate
  • the ratio between the binder and the doped tin oxide in the ink composition there is no special limit to the ratio between the binder and the doped tin oxide in the ink composition, provided the doped tin oxide may be dispersed uniformly on the surface of the insulating substrate.
  • the ink layer has certain amount of strength and certain amount of adhesion with the insulating substrate.
  • At least one metal layer may be formed on the ink layer.
  • the amount of the binder may range from about 1 weight part to about 60 weight parts. In some embodiments, the amount of the binder may range from about 30 weight parts to about 60 weight parts.
  • the ink composition may further contain a solvent.
  • the solvent With the solvent, the doped tin oxide may be dispersed in the binder more uniformly, and a more uniform ink layer may be formed on the surface of the insulating substrate.
  • the solvent may be any conventional solvent, without specific limits.
  • the solvent may be at least one selected from a group including: water, C 1 -C 12 alcohol, C 3 -C 12 ketone, C 6 -C 12 aromatic hydrocarbon, C 1 -C 12 alkyl halide, and C 2 -C 12 alkenyl halide.
  • the solvent may be at least one selected from a group including: methanol, ethanol, n-propanol, iso-propanol, n-butanol, tert-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol, acetone, 2-n-pentanone, 2-n-butanone, 3-methyl-2-pentanone, 2,3-butanedione, 2,3-pentanedione, 2,5-hexanedione, 1,3-cyclohexanedione, toluene, xylene and trichloroethylene.
  • the content of solvent in the ink composition there is no special limit to the content of solvent in the ink composition.
  • a content of solvent is added to disperse the doped tin oxide uniformly in the binder and to form a uniform ink layer on the surface of the insulating substrate.
  • the content of the solvent may range from about 20 weight parts to about 250 weight parts.
  • the ink composition may further contain an additive.
  • the additive may be selected according to, for example, its specific performance or functions.
  • the additive may be at least one selected from a group including: dispersant, antifoaming agent, leveling agent and viscosity regulator.
  • the content of the additive may be selected according to, for example, practical requirements or conventional operations. In some embodiments, based on 100 weight parts of the doped tin oxide, the amount of the additive may range from about 0.1 weigh parts to about 20 weight parts. In some embodiments, the amount of the additive may range from about 0.5 weigh parts to about 10 weight parts.
  • the time which the doped tin oxide costs to disperse uniformly in the binder and the optional solvent may be reduced, and the stability of the doped tin oxide may be improved.
  • the dispersant may be any substance which is capable of providing the above functions, without specific limits.
  • the dispersant may be an organic dispersant.
  • the organic dispersant may be at least one selected from a group including: aliphatic amine type dispersant, hydramine type dispersant, cyclic unsaturated amine type dispersant, fatty acid type dispersant, aliphatic amide type dispersant, ester type dispersant, paraffin type dispersant, phosphate type dispersant, polymer type dispersant (such as polyacrylate type dispersant or polyester type dispersant) and organic phosphine type dispersant.
  • the dispersant may be any conventional one that is commercially available. In some embodiments, the dispersant may be at least one selected from a group including: dispersants with the following Nos. commercially available from BYK company, GE: ANTI-TERRA-U, ANTI-TERRA-U 80, ANTI-TERRA-U 100, DISPERBYK-101, DISPERBYK-130, BYK-220 S, LACTIMON, LACTIMON-WS, BYK-W 966, DISPERBYK, BYK-154, BYK-9076, DISPERBYK-108, DISPERBYK-109, DISPERBYK-110, DISPERBYK-102, DISPERBYK-111, DISPERBYK-180, DISPERBYK-106, DISPERBYK-187, DISPERBYK-181, DISPERBYK-140, DISPERBYK-142,
  • PHOSPHOLAN PS-236 commercially available from Akzo Nobel Company, DL; dispersant No. PS-21A commercially available from Witco Chemical Company, US; and dispersants Serial Nos. Hypermer KD and Zephrym PD commercially available from Croda Company, GB.
  • the content of the dispersant may be determined based on actual practice without special limit. In some embodiments, based on 100 weight parts of the doped tin oxide, the content of the dispersant may range from about 0.1 weight parts to about 4 weight parts.
  • the antifoaming agent may be any conventional one capable of preventing the formation of foams, destroying the formed foams or removing the formed foams from the ink composition.
  • the antifoaming agent may be at least one selected from a group including: organic polysiloxane type antifoaming agent, polyether type antifoaming agent and fatty alcohol type antifoaming agent.
  • the antifoaming agent is of the organic polysiloxane series.
  • the antifoaming agent may be any conventional one which is commercially available.
  • the antifoaming agent may be at least one selected from a group including: antifoaming agents having the following Nos. commercially available from BYK Company, GE: BYK-051, BYK-052, BYK-053, BYK-055, BYK-057, BYK-020, BYK-065, BYK-066N, BYK-067A, BYK-070, BYK-080A, BYK-088, BYK-141, BYK-019, BYK-021, BYK-022, BYK-023, BYK-024, BYK-025, BYK-028, BYK-011, BYK-031, BYK-032, BYK-033, BYK-034, BYK-035, BYK-036, BYK-037, BYK-038, BYK-045, B
  • the content of the antifoaming agent in the ink composition may include any content that is known, without specific limits. In some embodiments, based on 100 weight parts of the doped tin oxide, the content of the antifoaming agent may range from about 0.01 weight parts to about 3 weight parts.
  • the ink layer formed on the surface of the insulating substrate can be more flat and become smoother.
  • the leveling agent may be conventional ones which are capable of realizing the above-mentioned functions.
  • the leveling agent may be at least one selected from a group including: polyacrylate series, polydimethylsiloxane series, polymethylphenylsiloxane series and fluorine-containing surfactant.
  • the leveling agent may be any conventional one which is commercially available.
  • the leveling agent may be at least one selected from a group including: leveling agents having the following Nos. commercially available from BYK Company, GE: BYK-333, BYK-306, BYK-358N, BYK-310, BYK-354 and BYK-356.
  • the content of the leveling agent in the ink composition may include any content that is known, without specific limits. In some embodiments, based on 100 weight parts of the doped tin oxide, the content of the leveling agent may range from about 0.3 weight parts to about 4 weight parts.
  • the viscosity of the ink composition may be adjusted, depending on the practical requirements.
  • the viscosity regulator may be conventional ones.
  • the viscosity regulator may be at least one selected from a group including: gaseous silica, polyamide wax, organic bentonite, hydrogenated castor oil, metallic soap, hydroxyl alkyl cellulose and derivatives thereof; polyvinyl alcohol and polyacrylate.
  • the content of the viscosity regulator in the ink composition may include any content that is known, without specific limits. In some embodiments, based on 100 weight parts of the doped tin oxide, the content of the viscosity regulator may range from about 0.3 weight parts to about 3 weight parts.
  • the ink composition contains, or alternatively consists of, the doped tin oxide, the binder, the solvent, the dispersant, the antifoaming agent, the leveling agent and the viscosity regulator.
  • the amount of the binder ranges from about 1 weight part to about 60 weight parts.
  • the amount of the solvent ranges from about 20 weight parts to about 250 weight parts.
  • the amount of the dispersant ranges from about 0.4 weight parts to about 4 weight parts.
  • the amount of the antifoaming agent ranges from about 0.1 weight part to about 3 weight parts.
  • the amount of the leveling agent ranges from about 0.3 weight parts to about 4 weight parts.
  • the amount of the viscosity regulator ranges from about 0.3 weight parts to about 3 weight parts.
  • the method for preparing the ink composition includes the following steps.
  • the doped tin oxide, the binder, and the optional solvent and additive are mixed to form a first mixture.
  • the first mixture is grinded in a mixer which can be, for example, a planetary ball mill, to obtain the ink composition.
  • Mixing and grinding in the planetary ball mill, as well as operation steps and conditions for the mixing and grinding may include any conventional method.
  • the ink composition on the surface of the insulating substrate which can be non-conductive to, for example, electricity, and followed by chemical plating on the insulating substrate, selective metallization of the surface of the insulating substrate may be achieved.
  • the doped tin oxide is dispersed in a predetermined part of the ink layer, or on a predetermined part of the surface of the insulating substrate.
  • metals may be deposited on the predetermined part of the insulating substrate, thereby at least one metal layer may be formed on the predetermined part of the insulating substrate. In this way, the selective metallization of the surface of the insulating substrate can be achieved.
  • a method for selectively metallizing a surface of an insulating substrate is provided.
  • the ink composition is described above.
  • the method includes forming an ink layer on the surface of an insulating substrate by providing the above-mentioned ink composition on the surface of the insulating substrate, and forming at least one metal layer on the ink layer by chemical plating.
  • the ink composition may be applied on a predetermined part of the surface of the insulating substrate, while the remaining of the surface of the insulating substrate is not covered with the ink composition. Therefore, the ink layer is only formed in the predetermined part of the surface of the insulating substrate.
  • the ink layer containing the doped tin oxide is conductive
  • at least one metal layer may be formed on portion of the ink layer, for example, on the predetermined part of the surface of the insulating substrate, and the metal layer may not be deposited on the remaining area of the surface of the substrate. In this way, selective metallization of the surface of the insulating substrate can be achieved.
  • a process selected from a group including: screen printing, spray coating, laser printing, ink jet printing, pad printing, gravure printing, letterpress printing, and lithographic printing can be used.
  • Specific operating steps and conditions of screen printing, spray coating, laser printing, ink jet printing, pad printing, gravure printing, letterpress printing, and lithographic printing may include conventional steps that are well known.
  • the ink composition is applied on the surface of the insulating substrate by ink jet printing or laser printing.
  • the method may further include a step of drying the ink layer.
  • the drying may include conventional methods that are known and may be selected based on the binder material and the optional solvent in the ink composition. In some embodiments, the drying may be carried out at a temperature ranging from about 40° C. to about 150° C. In some embodiments, the drying can be carried out for a time period ranging from about 0.5 hours to about 5 hours. In some embodiments, the drying may be performed under normal pressure. In some embodiments, the drying may be performed under a pressure lower than the normal pressure.
  • the ink layer has a thickness ranging from about 8 ⁇ m to about 50 ⁇ m. In some embodiments, the ink layer has a thickness ranging from about 12 ⁇ m to about 40 ⁇ m. In some embodiments, the ink layer has a thickness ranging from about 12 ⁇ m to about 25 ⁇ m.
  • the chemical plating may be carried out with the following steps.
  • the insulating substrate applied with the ink layer is immersed in a Cu solution.
  • the Cu solution may contain a Cu salt.
  • the Cu solution may further contain a reducing agent.
  • the Cu solution may have a pH ranging from about 12 to about 13.
  • the reducing agent may reduce the Cu ions in the Cu salt into Cu metal.
  • the reducing agent may be at least one selected from a group including: glyoxylic acid, diamide, and sodium phosphorate.
  • the method may further include a step of electroplating or chemical plating.
  • the electroplating or chemical plating may be performed for at least one time, so that additional metal layers, either of the same metal as or of different metals from the prior metal layers, may be formed on the prior metal layers.
  • a Cu layer is formed on the surface of the insulating substrate in the first chemical plating step, then a Ni layer is formed on the Cu layer in the following electroplating or chemical plating. With the additional Ni layer, oxidation of the Cu layer may be prevented.
  • the method further includes gasifying at least a part of a surface of the ink layer by irradiating the surface of the ink layer with an energy source, before the step of chemical plating.
  • a predetermined part of the ink layer may be removed and the doped tin oxide of the ink composition in this part may be exposed.
  • the metal layer may be formed on the predetermined part in the following plating step.
  • the energy source may be at least one selected from a group including: laser, electron beam and ion beam.
  • the energy source is a laser.
  • the energy provided by the laser may be high enough to cause the base polymer in the irradiated area of the surface of the polymer article to be gasified and the doped tin oxide in the irradiated area is exposed.
  • the doped tin oxide has excellent absorption capability to energy provided by the energy source, thus the base polymer in the predetermined part may be removed and the doped tin oxide in the predetermined part may be exposed, even irradiating with the energy source which provides relatively lower energy.
  • the irradiating may be performed by using a laser, and the laser may have a wavelength of 157-10600 nm and a power of 5-100 W.
  • the laser may have a wavelength of 1064-10600 nm and a power of 3-50 W.
  • the laser may have a wavelength of 1064 nm and a power of 3-40 W.
  • the laser may have a wavelength of 1064 nm and a power of 5-10 W.
  • the predetermined part of the surface of the polymer article may form a pattern, then the metal layer formed on the predetermined part may form a metal pattern on the insulating substrate. With the laser, the precision of the metal pattern may be improved.
  • the irradiating may be performed by using an electron beam, and the electron beam may have a power density of 10-10 11 W/cm 2 .
  • the irradiating may be performed by using an ion beam, and the ion beam may have an energy of 10-10 6 eV.
  • the insulating substrate may contain at least one selected from a group including: plastic, rubber, fiber, coating layer, ceramic, glass, wood, cement and paper. In some embodiments, the insulating substrate may be made by plastic or ceramic.
  • the insulating substrate is made of flexible plastic, which may include, but not limited to, polyethylene terephthalate, polyimide, polycarbonate, poly(ether-ketone), poly(ether-ether-ketone) and liquid crystal.
  • flexible plastic which may include, but not limited to, polyethylene terephthalate, polyimide, polycarbonate, poly(ether-ketone), poly(ether-ether-ketone) and liquid crystal.
  • the composition of the doped tin oxide was measured by the amount of raw materials used for preparing thereof.
  • the average particle size of the doped tin oxide was measured by a Laser Particle Sizer commercially available from Chengdu Jingxin Powder Analyse Instrument Co., Ltd., China.
  • the light reflectivity of the doped tin oxide was measured by a prescribed method in GJB 5023.1-2003 via Lambda 750 UV/VIS/NIR spectrophotometer measured at a wavelength of 1064 nm.
  • the adhesion between the metal layer and the polymer sheet was determined by a cross-cut process. Specifically, a surface of the sample to be measured was cut using a cross-cut knife to form 100 grids (1 mm ⁇ 1 mm). A gap between adjacent grids was formed to reach the bottom of the metal layer. Debris in the test region was cleaned using a brush, and then an adhesive tape (3M600 gummed paper) was sticked to a tested grid. One end of the sticked adhesive paper was rapidly torn off in a vertical direction. Two identical tests were performed on the same grid region. The grade of the adhesion was determined according to the following standard:
  • Grade 5B the cut edge is smooth and the metal layers both at the cut edge and cut intersection of the grid does not fall off;
  • Grade 4B the metal layers at the cut intersection are partly removed, but no more than 5% (area percent) of the metal layers are removed;
  • Grade 3B the metal layers both at the cut edge and the cut intersection are partly removed, and 5-15% (area percent) of the metal layers are removed;
  • Grade 2B the metal layers at both the cut edge and the cut intersection are partly removed, and 15-35% (area percent) of the metal layers are removed;
  • Grade 1B the metal layers at both the cut edge and the cut intersection are partly removed, and 35-65% (area percent) of the metal layers are removed;
  • Grade 0B the metal layers at both the cut edge and the cut intersection are partly removed, and more than 65% (area percent) of the metal layers are removed.
  • the present Embodiment 1 includes the following steps.
  • Step 1) Particles of SnO 2 were grinded in a grinding mill for 2 h together with Nb 2 O 5 and ethanol, to form a first mixture. Based on 100 weight parts of SnO 2 and Nb 2 O 5 , the amount of ethanol was 250 weight parts. Based on the total amount of SnO 2 and Nb 2 O 5 , the content of Nb 2 O 5 was 10 wt %.
  • the first mixture was dried under an air atmosphere at 60° C. for 3 h, thus obtaining a second mixture having an average particle size of 1.5 ⁇ m.
  • the second mixture was calcined under an air atmosphere at 1050° C. for 5 h and grinded to powders having an average particle size of 1.2 ⁇ m.
  • the powders included doped tin oxide, and its CIELab color value and light reflectivity are listed in Table 1.
  • Step 2 The powders of doped tin oxide were mixed with polyhexamethylene terephthalamide (referred to as PA6T) and antioxidant 1010 to form a third mixture, and then the third mixture was extruded and pelleted with an extruder to form pellets.
  • the pellets were injection molded in an injection mould, thus forming a PA6T sheet containing the doped tin oxide. Based on 100 weight parts of the PA6T, the amount of the doped tin oxide was 5 weight parts, and the amount of the antioxidant 1010 was 10 weight parts.
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 3 A surface of the PA6T sheet was irradiated with a laser provided by a YAG laser, to remove PA6T on a predetermined part (corresponding to the structure of a receiver) of the surface of the PA6T sheet.
  • the laser had a wavelength of 1064 nm, a power of 5 W, a frequency of 30 kHz, a scanning speed of 1000 mm/s and a filling distance of 30 ⁇ m.
  • Step 4) The PA6T sheet irradiated with laser was subjected to chemical plating by using a Cu solution for 1 h, thus forming a metal layer on the predetermined part of the surface of the PA6T sheet.
  • the metal layer may be used as an antenna.
  • the Cu solution contained: 0.12 mol/L of CuSO 4 .5H 2 O, 0.14 mol/L of Na 2 EDTA.2H 2 O, 10 mg/L of potassium ferrocyanide, 10 mg/L of 2,2′-bipyridine and 0.10 mol/L of glyoxylic acid.
  • the Cu solution had a temperature of 50° C. and a pH of 12.5-13 which was adjusted with NaOH and H 2 SO 4 .
  • the present Comparative Embodiment 1 includes the following steps.
  • Step 1) Particles of SnO 2 (raw material of step 1) in Embodiment 1) was mixed with PA6T and antioxidant 1010 to form a mixture, and then the mixture was extruded and pelleted with the same condition as described in the step 2) of Embodiment 1, thus forming a PA6T sheet containing tin oxide. Based on 100 weight parts of the PA6T, the amount of the particles of SnO 2 was 5 weight parts, and the amount of the antioxidant 1010 was 10 weight parts.
  • Step 2 The PA6T sheet obtained from the step 1) was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 3) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Comparative Embodiment 2 includes the following steps.
  • Step 1) The step of preparing the doped tin oxide was substantially the same as the step 1) of Embodiment 1, with the exception that: the same amount of Sb 2 O 3 was used instead of Nb 2 O 5 .
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 2) The step of preparing the PA6T sheet was substantially the same as the step 2) of Embodiment 1, with the exception that: the doped tin oxide was those obtained from the step 1) of Comparative Embodiment 2.
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 3) The PA6T sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 4) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Comparative Embodiment 3 includes the following steps.
  • Step 1) The step of preparing the doped tin oxide was substantially the same as the step 1) of Embodiment 1, with the exception that: the same amount of V 2 O 5 was used instead of Nb 2 O 5 .
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 2 The step of preparing the PA6T sheet was substantially the same as the step 2) of Embodiment 1, with the exception that: the doped tin oxide was those obtained from thee step 1) of Comparative Embodiment 3.
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 3) The PA6T sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 4) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Comparative Embodiment 4 includes the following steps.
  • Step 1) The step of preparing the doped tin oxide was substantially the same as the step 1) of Embodiment 1, with the exception that: the second mixture was calcined under an nitrogen atmosphere.
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 2 The step of preparing the PA6T sheet was substantially the same as the step 2) of Embodiment 1, with the exception that: the doped tin oxide was those obtained from thee step 1) of Comparative Embodiment 4.
  • the CIELab color value of the PA6T sheet was listed in Table 1.
  • Step 3) The PA6T sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 4) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Embodiment 2 includes the following steps.
  • Step 1) The doped tin oxide was prepared by the same step 1) of Embodiment 1.
  • Step 2) The step of preparing the PA6T sheet was substantially the same as the step 2) of Embodiment 1, with the exception that: based on 100 weight parts of the PA6T, the amount of the doped tin oxide was 3 weight parts.
  • Step 3) The PA6T sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 4) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Embodiment 3 includes the following steps.
  • Step 1) The doped tin oxide was prepared by the same step 1) of Embodiment 1.
  • Step 2) The step of preparing the PA6T sheet was substantially the same as the step 2) of Embodiment 1, with the exception that: based on 100 weight parts of the PA6T, the amount of the doped tin oxide was 1 weight parts.
  • Step 3) The PA6T sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 1.
  • Step 4) The PA6T sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Embodiment 4 includes the following steps.
  • Step 1) Particles of SnO 2 were grinded in a grinding mill for 3 h together with Nb 2 O 5 and ethanol, to form a first mixture. Based on 100 weight parts of SnO 2 and Nb 2 O 5 , the amount of ethanol was 300 weight parts. Based on the total amount of SnO 2 and Nb 2 O 5 , the content of Nb 2 O 5 was 5 wt %.
  • the first mixture was dried under an air atmosphere at 80° C. for 2 h, thus obtaining a second mixture having an average particle size of 2 ⁇ m.
  • the second mixture was calcined under an air atmosphere at 1300° C. for 8 h and grinded to powders having an average particle size of 0.5 ⁇ m.
  • the powders included doped tin oxide, and its CIELab color value and light reflectivity are listed in Table 1.
  • Step 2 The powders of doped tin oxide were mixed with polycarbonate (referred to as PC), antioxidant 1098 and talc to form a third mixture. Then the third mixture was extruded and pelleted with an extruder to form pellets. The pellets were injection molded in an injection mould, thus forming a PC sheet containing the doped tin oxide. Based on 100 weight parts of the PC, the amount of the doped tin oxide was 10 weight parts, the amount of the antioxidant 1098 was 8 weight parts, and the amount of the talc was 15 weight parts.
  • the CIELab color value of the PC sheet was listed in Table 1.
  • Step 3 A surface of the PC sheet was irradiated with a laser provided by a YAG laser, to remove PC on a predetermined part (corresponding to the structure of a receiver) of the surface of the PC sheet.
  • the laser had a wavelength of 1064 nm, a power of 4 W, a frequency of 30 kHz, a scanning speed of 1000 mm/s and a filling distance of 30 ⁇ m.
  • Step 4) The PC sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Embodiment 5 includes the following steps.
  • Step 1) The step of preparing the doped tin oxide was substantially the same as the step 1) of Embodiment 4, with the exception that: the second mixture was calcined under an air atmosphere at 1350° C. for 8 h.
  • Step 2) The step of preparing the PC sheet was substantially the same as the step 2) of Embodiment 4, with the exception that: the doped tin oxide was those obtained from the step 1) of Embodiment 5.
  • Step 3) The PC sheet was irradiated with a laser under the same condition as described in the step 3) of Embodiment 4.
  • Step 4) The PC sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the present Embodiment 6 includes the following steps.
  • Step 1) Particles of SnO 2 were grinded in a grinding mill for 6 h together with Nb 2 O 5 and ethanol, to form a first mixture. Based on 100 weight parts of SnO 2 and Nb 2 O 5 , the amount of ethanol was 400 weight parts. Based on the total amount of SnO 2 and Nb 2 O 5 , the content of Nb 2 O 5 was 4 wt %.
  • the first mixture was dried under an air atmosphere at 50° C. for 6 h, thus obtaining a second mixture having an average particle size of 1 ⁇ m.
  • the second mixture was calcined under an air atmosphere at 1200° C. for 8 h and grinded to powders having an average particle size of 0.8 ⁇ m.
  • the powders included doped tin oxide, and its CIELab color value and light reflectivity are listed in Table 1.
  • Step 2 The powders of doped tin oxide were mixed with poly(butylene terephthalate) (referred PBT), antioxidant 1098 and talc to form a third mixture, and then the third mixture was extruded and pelleted with an extruder to form pellets.
  • the pellets were injection molded in an injection mould, thus forming a PBT sheet containing the doped tin oxide. Based on 100 weight parts of the PBT, the amount of the doped tin oxide was 15 weight parts, the amount of the antioxidant 1098 was 8 weight parts, the amount of the talc was 20 weight parts.
  • the CIELab color value of the PBT sheet was listed in Table 1.
  • Step 3 A surface of the PBT sheet was irradiated with a laser provided by a YAG laser, to remove PBT on a predetermined part (corresponding to the structure of a receiver) of the surface of the PC sheet.
  • the laser had a wavelength of 1064 nm, a power of 6 W, a frequency of 30 kHz, a scanning speed of 1000 mm/s and a filling distance of 30 ⁇ m.
  • Step 4) The PBT sheet irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 1.
  • the amount of the antioxidant 1010 was 10 weight parts.
  • the PA6T sheet has a CIELab color value L* of 83.89, a CIELab color value a of ⁇ 0.15, and a CIELab color value b of 1.56. 2
  • a PC sheet was prepared by the steps of substantially the same as the step 2) of Embodiment 4, with the exception that: only mixed PC, antioxidant 1098 and talc to form a third mixture, without the doped tin oxide. Based on 100 weight parts of the PC, the amount of the antioxidant 1098 was 8 weight parts, and the amount of the talc was 15 weight parts.
  • the PC sheet has a CIELab color value L* of 83.12, a CIELab color value a of 1.54, and a CIELab color value b of 4.35.
  • a PBT sheet was prepared by the steps of substantially the same as the step 2) of Embodiment 6, with the exception that: only mixed PBT, antioxidant 1098 and talc to form a third mixture, without the doped tin oxide. Based on 100 weight parts of the PBT, the amount of the antioxidant 1098 was 8 weight parts, and the amount of the talc was 20 weight parts.
  • the PBT sheet has a CIELab color value L* of 87.55, a CIELab color value a of 2.30, and a CIELab color value b of 2.33.
  • the doped tin oxide obtained from tin oxide doped with niobium-containing element and sintered under an oxidizing atmosphere had a light color, and had very strong absorption power to light.
  • the doped tin oxide was capable of promoting chemical plating in a method of selectively metalizing the surface of the polymer substrate as a chemical plating promoter.
  • presetting the doped tin oxide in the polymer substrate, especially the polymer substrate with light color does not or basically does not cover the original color of the polymer substrate, further does not obviously interfere with the color of the polymer substrate.
  • the polymer substrate irradiated with a laser to remove PA6T on a predetermined part of the surface had a good plating activity. A higher plating speed was obtained and a continuous metal layer was formed without leakage of plating, together with higher adhesivity between the metal layer and the polymer substrate during chemical plating.
  • the present Embodiment 7 includes the following steps.
  • Step 1) 100 g the doped tin oxide (grinded to powders having an average particle size of 200 nm) obtained from the step 1) of Embodiment 1, 30 g binder CAB381-0.5 (commercially available from Eastman Chemical Company, US), 150 g n-ethanol, 1.5 g dispersing agent DISPERBYK-165 (commercially available from BYK Company, GE), 0.5 g antifoaming agent BYK-051 (commercially available from BYK Company, GE), 0.6 g leveling agent BYK-333 (commercially available from BYK Company, GE) and 0.75 g hydrogenated castor oil (commercially available from Wuhan Jinnuo Chemical Company, China) were mixed uniformly to obtain an ink composition.
  • binder CAB381-0.5 commercially available from Eastman Chemical Company, US
  • dispersing agent DISPERBYK-165 commercially available from BYK Company, GE
  • 0.5 g antifoaming agent BYK-051
  • Step 2 The ink composition was applied on a surface of an Al 2 O 3 ceramic substrate by ink jet printing, and then the Al 2 O 3 ceramic substrate applied with the ink composition was dried at a temperature of 100° C. for 3 hours. Thus an ink layer was formed on the surface of the ceramic substrate.
  • the ink layer formed a predetermined pattern and was used as the antenna for a receiver.
  • the ink layer was tested with a scanning electron microscope, and it showed that the ink layer had a thickness of 10 ⁇ m.
  • Step 3 The ink layer was irradiated with a laser, which had a wavelength of 1064 nm, a power of 2 W, a frequency of 20 kHz, a moving speed of 800 mm/s and a filling distance of 20 ⁇ m.
  • Step 4) The ceramic substrate with the irradiated ink layer was subjected to chemical plating for 1 h using a Cu solution containing: 0.12 mol/L of CuSO 4 .5H 2 O, 0.14 mol/L of Na 2 EDTA.2H 2 O, 10 mg/L of potassium ferrocyanide, 10 mg/L of 2,2′-bipyridine and 0.10 mol/L of glyoxylic acid.
  • the Cu solution had a temperature of 50° C. and a pH of 12.5-13 which was adjusted with NaOH and H 2 SO 4 . Therefore a metal layer was formed on the ceramic substrate.
  • the present Embodiment 8 includes substantially the same steps as those of Embodiment 7, with the exception that: the step 3) was not performed, i.e., after the ink layer was applied on the surface of the ceramic substrate, the step of chemical plating was performed directly.
  • the ceramic substrate was observed, and it was found that the metal layer formed a continuous complete circuit on the ceramic substrate.
  • the plating speed and adhesion between the metal layer and the ceramic substrate were both listed in Table 2.
  • the present Embodiment 9 includes the following steps.
  • Step 1) 100 g doped tin oxide (grinded to powders having an average particle size of 100 nm) obtained from the step 1) of Embodiment 4, 45 g polyvinyl butyral Serial No. Mowital (commercially available from Kuraray Company, JP) and 80 g toluene were mixed uniformly to obtain an ink composition.
  • Step 2 The ink composition was applied on a surface of a poly(ether-ether-ketone) (PEEK) substrate, and then the PEEK substrate applied with the ink composition was dried at a temperature of 120° C. for 6 hours. Thus an ink layer was formed on the surface of the ceramic substrate.
  • the ink layer formed a predetermined pattern and was used as the antenna for a receiver.
  • the ink layer was tested with a scanning electron microscope, and it showed that the ink layer had a thickness of 20 ⁇ m.
  • Step 3 The ink layer was irradiated with a laser, which had a wavelength of 1064 nm, a power of 3 W, a frequency of 20 kHz, a moving speed of 1000 mm/s and a filling distance of 20 ⁇ m.
  • Step 4) The ceramic substrate with the irradiated ink layer was subjected to chemical plating under the same condition as described in the step 4) of Embodiment 7.
  • the present Embodiment 10 includes the following steps.
  • Step 1) 100 g the doped tin oxide (grinded to powders having an average particle size of 80 nm) obtained from the step 1) of Embodiment 6, 50 g EVA binder (commercially available from Eastman Chemical Company, US), 200 g toluene, 2 g dispersing agent ANTI-TERRA-U 80, (commercially available from BYK Company, GE), 1 g antifoaming agent BYK-065 (commercially available from BYK Company, GE), 0.8 g leveling agent BYK-306 (commercially available from BYK Company, GE) and 0.6 g hydroxyethyl cellulose (commercially available from Luzhou North Dadong Chemical Company, China) were mixed uniformly to obtain an ink composition.
  • EVA binder commercially available from Eastman Chemical Company, US
  • 2 g dispersing agent ANTI-TERRA-U 80 commercially available from BYK Company, GE
  • 1 g antifoaming agent BYK-065 commercial
  • Step 2 The ink composition was applied on a surface of a glass substrate by ink jet printing, and then the glass substrate applied with the ink composition was dried at a temperature of 150° C. for 4 hours. Thus an ink layer was formed on the surface of the glass substrate.
  • the ink layer formed a predetermined pattern and was used as the antenna for a receiver.
  • the ink layer was tested with a scanning electron microscope, and it showed that the ink layer had a thickness of 15 ⁇ m.
  • Step 3) The glass substrate was irradiated with a laser under the same condition as described in the step 3) of Embodiment 7.
  • Step 4) The glass substrate irradiated with laser was subjected to a chemical plating under the same condition as described in the step 4) of Embodiment 7.
  • the ink layer formed on the surface of the insulating substrate via an ink jet printing of the ink composition had a chemical plating activity, and a metal layer was formed on the surface of the ink layer by chemical plating.

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