Method of depositing a metal on a surface
First Claim
1. A method of depositing a metal on a surface capable of retaining a colloidal species thereon which comprises:
- (a) selectively coating a portion of the surface with a colloidophobic material selected from the group of colloidophobic materials consisting of (1) a composition comprising dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR9## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms to render said portion collodiophobic and to delineate an exposed surface pattern capable of retaining a colloidal species thereon; and
(b) treating said selectively coated surface with a sol comprising a colloidal species selected from the group consisting of (a1) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b1) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit said colloidal species on said exposed surface pattern.
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Accused Products
Abstract
A method of depositing a metal on a surface of a substrate is disclosed. The method comprises selectively coating portions of the surface with a colloidophobic material to render the portions colloidophobic and to delineate an exposed surface pattern which is capable of retaining a colloidal species thereon. The selectively coated surface is treated with a sol comprising a colloidal species selected from the group comprising (1) a species capable of reducing an activating metal ion to an activating metal, and (2) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit the colloidal species on the exposed surface pattern.
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Citations
45 Claims
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1. A method of depositing a metal on a surface capable of retaining a colloidal species thereon which comprises:
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(a) selectively coating a portion of the surface with a colloidophobic material selected from the group of colloidophobic materials consisting of (1) a composition comprising dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR9## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms to render said portion collodiophobic and to delineate an exposed surface pattern capable of retaining a colloidal species thereon; and (b) treating said selectively coated surface with a sol comprising a colloidal species selected from the group consisting of (a1) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b1) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit said colloidal species on said exposed surface pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of depositing a metal pattern on a surface, capable of retaining a colloidal species thereon, which comprises:
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(a) coating a portion of the surface with a colloidophobic material selected from the group of colloidophobic materials consisting of (1) a composition comprising dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR10## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms to render the surface energy of said portion lower relative to untreated portions to render said treated portion colloidophobic and to delineate an untreated surface pattern corresponding to the metal pattern; and (b) treating said coated surface with a sol having a higher surface energy relative to the colloidophobic surface to adherently deposit and retain on said delineated surface pattern colloidal particles selected from the group consisting of (a1) colloidal particles comprising a species capable of reducing an activating metal ion to an activating metal, and (b1) colloidal particles comprising an activating metal species capable of participating in an electroless metal deposition. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of rendering an article, capable of retaining thereon a collodial species, selectively capable of reducing thereon a precious metal from a precious metal salt, which comprises:
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selectively coating a portion of the article with a colloidophobic material selected from the group of colloidophobic materials consisting of (1) a composition comprising a dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR11## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms to delineate a colloidophobic surface pattern and a colloidophilic surface pattern; treating said selectively coated article with a sol comprising a colloidal species capable of reducing a precious metal ion to a precious metal to deposit said colloidal species thereon; treating said deposited article with an inert rinsing agent to remove excess portions of said sol from at least said colloidophobic pattern; and exposing said deposited colloidophilic pattern to a precious metal ion to reduce and deposit a precious metal thereon. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A process for the preparation of an electrically non-conductive surface capable of retaining thereon a colloidal species to receive a metal coating over a selected area thereof, which comprises:
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selectively coating a portion of the surface with a colloidophobic material selected from the group of colloidophobic materials consisting of (1) a composition comprising a dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR12## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms to delineate a relatively colloidophilic area corresponding to the selected area; depositing on said selectively coated surface a sol comprising a colloidal activating metal species selected from the group consisting of (a1) a species capable of initially functioning as a reduction catalyst in an electroless metal deposition, and (b1) a species capable of being reduced to a species capable of functioning as a reduction catalyst in an electroless metal deposition; and
rinsing said deposited surface with an inert agent to remove said sol from said coated portion. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. A method of selectively rendering a hydrophobic surface hydrophilic, said surface being capable of retaining thereon a colloidal species, which comprises:
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(a) selectively coating a portion of the surface with a colloidophobic material, selected from the group of colloidophobic materials consisting of (1) a composition comprising a dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoise, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of the silica of a disilizane compound having the general formula ##STR13## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having one to five carbon atoms, to render said portion colloidophobic and to delineate an exposed surface pattern capable of retaining a colloidal species thereon; and (b) treating said selectively coated surface with a stable aqueous sol comprising colloidal particles of a hydrous oxide of an element selected from the group consisting of Be, Mg, Ti, Zr, V, Cr, Mo, W, Mn, Fe, Co, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, In, Tl, Si, Ge, Sn, Pb, Bi, La, Ce, Th, U and mixtures thereof to deposit said colloidal particles on said exposed surface pattern to render said pattern hydrophilic. - View Dependent Claims (40, 41, 42, 43, 44)
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45. A method of depositing a metal on a surface, capable of retaining thereon a colloidal species, which comprises:
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(a) selectively coating a portion of the surface with a colloidophobic material selected from the group consisting of (1) a composition comprising a dimethoxy polysiloxane having a viscosity ranging from 20 to 100,000 centipoises, (2) a composition comprising a polyfluoroalkyl ester, (3) a composition comprising a perfluoro epoxy resin, and (4) a composition comprising a colloidal silica having chemically bonded to the surface thereof amounts of from about 0.01 to about 30 percent by weight based on the weight of silica of a disilizane compound having the general formula ##STR14## wherein R1, R2, R3, R4, R5 and R6 are like or unlike radicals selected from the group consisting of alkyl having having one to five carbon atoms, to render said portion colloidophobic and to delineate an exposed surface pattern capable of retaining a colloidal species thereon; (b) treating said selectively coated surface with a sol comprising a colloidal species selected from the group consisting of (a1) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b1) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit said colloidal species on said exposed surface pattern; and (c) treating said sol treated surface with an inert rinsing agent to remove excess portions of said sol from said sol treated surface to form retained, deposited colloidal species on said pattern.
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Specification