US4100037A
Expired / Lapsed
US
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Method of depositing a metal on a surface
Assignee: AT&T Inc
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Filing: 1976-03-08
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Granted: 1978-07-11
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Expires: 1996-03-08
Abstract
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.
Inventors
- 👤 William James Baron
- 👤 John Thomas Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:15
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/184; C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1603; C23C18/1607; C23C18/1608; C23C18/18; C23C18/20; C23C18/2006; C23C18/2046; C23C18/2073; C23C18/2086; H05K2203/00; H05K2203/11; H05K2203/1173; H05K2203/14; H05K2203/1415
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
230 words
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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b 1 ) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit said colloidal species on said exposed surface pattern.
Claim 2
Independent Claim
230 words
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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b 1 ) a colloidal activating metal species capable of participating in an electroless metal deposition to deposit said colloidal species on said exposed surface pattern.
Claim 3
Dependent Claim
92 words
The method as defined in claim 1 which further comprises forming an electroless metal deposition catalyst pattern by: exposing said deposited pattern to an activating metal ion, when said deposited colloidal species comprises (a 1 ), to deposit an activating metal thereon; or exposing said deposited pattern to a suitable reducing species, when said deposited species comprises (b 1 ), and where said colloidal activating metal species is capable of being reduced to a reduction catalyst in an electroless process, to reduce said activating metal species to deposit an activating metal thereon.
Claim 4
Dependent Claim
26 words
The method as defined in claim 2 which further comprises exposing said catalyst pattern to an electroless metal deposition solution to deposit an electroless metal thereon.
Claim 5
Dependent Claim
21 words
The method as defined in claim 3 which further comprises electroplating said deposited electroless metal pattern to electrodeposit a metal thereon.
Claim 6
Dependent Claim
32 words
The method as defined in claim 1 which further comprises treating said sol treated surface with an inert rinsing agent to remove excess portions of said sol from said sol treated surface.
Claim 7
Dependent Claim
15 words
The method as defined in claim 5 wherein said inert reagent comprises an aqueous solution.
Claim 8
Dependent Claim
18 words
The method as defined in claim 1 wherein said colloidophobic material comprises said composition comprising said colloidal silica.
Claim 9
Dependent Claim
25 words
The method as defined in claim 1 wherein said polyfluoroalkyl ester is selected from the group consisting of polyperfluoro octyl methacrylate and polyperfluoro lauryl methacrylate.
Claim 10
Dependent Claim
64 words
The method as defined in claim 1 wherein said perfluoro epoxy resin is selected from the group consisting of (a) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxy-hexafluoro-2-propyl]-5-heptafluoro-propyl benzene and 1,4 bis (aminomethyl) cyclohexane and (b) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxyhexafluoro-2-propyl]-5-pentadecafluoro-heptylbenzene, 1,4 bis (aminomethyl) cyclohexane and perfluorotetradecane.
Claim 11
Dependent Claim
48 words
The method as defined in claim 1 wherein in step (b) said selectively coated surface is treated with a stable aqueous sol comprising colloidal particles of a hydrous oxide of an element selected from the group consisting of Ti, V, Cr, Fe, Sn, Pb, Bi and mixtures thereof.
Claim 12
Dependent Claim
34 words
The method as defined in claim 1 wherein in step (b) said selectively coated surface is treated with a stable aqueous sol comprising colloidal particles of hydrous oxide of Pd, Pt, Ag and Au.
Claim 13
Dependent Claim
45 words
The method as defined in claim 1 wherein said deposited species comprises (b 1 ) which is initially capable of catalyzing an electroless metal deposition and which further comprises treating said deposited surface with an electroless metal deposition solution to deposit an electroless metal thereon.
Claim 14
Independent Claim
253 words
A method of depositing a metal pattern on a surface, capable of retaining a colloidal species thereon, which comprises: (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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) colloidal particles comprising a species capable of reducing an activating metal ion to an activating metal, and (b 1 ) colloidal particles comprising an activating metal species capable of participating in an electroless metal deposition.
Claim 15
Independent Claim
253 words
A method of depositing a metal pattern on a surface, capable of retaining a colloidal species thereon, which comprises: (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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) colloidal particles comprising a species capable of reducing an activating metal ion to an activating metal, and (b 1 ) colloidal particles comprising an activating metal species capable of participating in an electroless metal deposition.
Claim 16
Dependent Claim
18 words
The method as defined in claim 13 wherein said colloidophobic material comprises said composition comprising said colloidal silica.
Claim 17
Dependent Claim
25 words
The method as defined in claim 13 wherein said polyfluoroalkyl ester is selected from the group consisting of polyperfluoro octyl methacrylate and polyperfluoro lauryl methacrylate.
Claim 18
Dependent Claim
65 words
The method as defined in claim 13 wherein said perfluoro epoxy resin is selected from the group consisting of (a) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxy-hexafluoro-2-propyl]-5-heptafluoro-propyl benzene and 1,4 bis (aminomethyl) cyclohexane and (b) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxyhexafluoro-2-propyl]-5-pentadecafluoro-heptyl benzene, 1,4 bis (aminomethyl) cyclohexane and perfluorotetradecane.
Claim 19
Dependent Claim
47 words
The method as defined in claim 13 wherein in step (b) said selectively coated surface is treated with a stable aqueous sol comprising colloidal particles of hydrous oxide of an element selected from the group consisting of Ti, V, Cr, Fe, Sn, Pb, Bi and mixtures thereof.
Claim 20
Dependent Claim
35 words
The method as defined in claim 13 wherein in step (b) said selectively coated surface is treated with a stable aqueous sol comprising colloidal particles of a hydrous oxide of Pd, Pt, Ag and Au.
Claim 21
Dependent Claim
29 words
The method as defined in claim 13 which further comprises rinsing said sol-treated surface with an inert agent to remove excess portions of said sol from said sol-treated surface.
Claim 22
Dependent Claim
40 words
The method as defined in claim 19 which further comprises: when said deposited colloidal particles comprise (a 1 ), exposing said deposited pattern to an activating metal ion to deposit an activating metal thereon to form an activating metal pattern.
Claim 23
Dependent Claim
26 words
The method as defined in claim 20 which further comprises exposing said activating metalpattern to an electroless metal deposition solution to deposit an electroless metal thereon.
Claim 24
Dependent Claim
21 words
The method as defined in claim 21 which further comprises elctroplating said deposited electroless metal pattern to electrodeposit a metal thereon.
Claim 25
Dependent Claim
60 words
The method as defined in claim 19 wherein: said selected species (b 1 ) comprises an activating metal species capable of being reduced to a reduction catalyst in a elctroless metal deposition process; and which further comprises threating said deposited pattern with a suitable reducing species to reduce said activating metal species to said catalyst to form a catalyst pattern.
Claim 26
Dependent Claim
25 words
The method as defined in claim 23 which further comprises exposing said atalyst pattern to an electroless metal deposition solutionto deposit an electroless metal thereon.
Claim 27
Dependent Claim
52 words
The method as defined in claim 19 wherein: said selected species (b 1 ) comprises an activating metal species initially capable of functioning as a reduction catalyst in an electroless metal-deposition process, and which further comprises exposing said deposited pattern to an electroless metal deposition solution to deposit an electroless metal thereon.
Claim 28
Independent Claim
238 words
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: 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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.
Claim 29
Independent Claim
238 words
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: 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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.
Claim 30
Dependent Claim
18 words
The method as defined in claim 26 wherein said colloidophobic material comprises said composition comprising said colloidal silica.
Claim 31
Dependent Claim
25 words
The method as defined in claim 26 wherein said polyfluoroalkyl ester is selected from the group consisting of polyperfluoro octyl methacrylate and polyperfluoro lauryl methacrylate.
Claim 32
Dependent Claim
66 words
The method as defined in claim 26 wherein said perfluoro epoxy resin is selected from the group consisting of (a) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxy-hexafluoro-2-propyl]-5-heptafluoro-propyl benzene and 1,4 bis (aminomethyl) cyclohexane and (b) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxyhexafluoro-2-propyl]-5-penta decafluoro-heptyl benzene, 1,4 bis (aminomethyl) cyclohexane and perfluorotetradecane.
Claim 33
Dependent Claim
48 words
The method as defined in claim 26 where in step (b) said selectively coated surface is treated with a stable aqueous sol comprising colloidal particles of a hydrous oxide of an element selected from the group consisting of Ti, V, Cr, Fe, Sn, Pb, Bi and mixtures thereof.
Claim 34
Dependent Claim
16 words
The method as defined in claim 26 wherein said inert rinsing agent comprises an aqueous solution.
Claim 35
Dependent Claim
249 words
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: 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a species capable of initially functioning as a reduction catalyst in an electroless metal deposition, and (b 1 ) 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.
Claim 36
Dependent Claim
249 words
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: 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a species capable of initially functioning as a reduction catalyst in an electroless metal deposition, and (b 1 ) 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.
Claim 37
Dependent Claim
54 words
The method as defined in claim 32 which further comprises: when said activating metal species comprises (b 1 ), treating said rinsed surface with a suitable reducing agent to form a catalytic pattern corresponding to the selected area; and exposing said catalytic pattern to an electroless plating solution to deposit an electroless metal thereon.
Claim 38
Dependent Claim
34 words
The method as defined in claim 32 which further comprises when said activating metal species comprises (a 1 ), exposing said rinsed surface to an electroless plating solution to deposit an electroless metal thereon.
Claim 39
Dependent Claim
18 words
The method as defined in claim 32 wherein said colloidophobic material comprises said composition comprising said colloidal silica.
Claim 40
Dependent Claim
25 words
The method as defined in claim 32 wherein said polyfluoroalkyl ester is selected from the group consisting of polyperfluoro octyl methacrylate and polyperfluoro lauryl methacrylate.
Claim 41
Dependent Claim
66 words
The method as defined in claim 32 wherein said perfluoro epoxy resin is selected from the group consisting of (a) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxy-hexafluoro-2-propyl]-5-heptafluoro-propyl benzene and 1,4 bis (aminomethyl) cyclohexane and (b) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxyhexafluoro-2-propyl]-5-penta decafluoro-heptyl benzene, 1,4 bis (aminomethyl) cyclohexane and perfluorotetradecane.
Claim 42
Dependent Claim
15 words
The method as defined in claim 32 wherein said inert agent comprises an aqueous solution.
Claim 43
Independent Claim
248 words
A method of selectively rendering a hydrophobic surface hydrophilic, said surface being capable of retaining thereon a colloidal species, 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 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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.
Claim 44
Independent Claim
248 words
A method of selectively rendering a hydrophobic surface hydrophilic, said surface being capable of retaining thereon a colloidal species, 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 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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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.
Claim 45
Dependent Claim
32 words
The method as defined in claim 39 which further comprises treating said sol treated surface with an inert rinsing agent to remove excess portions of said sol from said sol treated surface.
Claim 46
Dependent Claim
15 words
The method as defined in claim 40 wherein said inert reagent comprises an aqueous solution.
Claim 47
Dependent Claim
18 words
The method as defined in claim 39 wherein said colloidophobic material comprises said composition comprising said colloidal silica.
Claim 48
Dependent Claim
25 words
The method as defined in claim 39 wherein said polyfluoroalkyl ester is selected from the group consisting of polyperfluoro octyl methacrylate and polyperfluoro lauryl methacrylate.
Claim 49
Dependent Claim
66 words
The method as defined in claim 39 wherein said perfluoro epoxy resin is selected from the group consisting of (a) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxy-hexafluoro-2-propyl]-5-heptafluoro-propyl benzene and 1,4 bis (aminomethyl) cyclohexane and (b) the reaction product of a reaction mixture comprising the diglycidyl ether of 1,3 bis [2-hydroxyhexafluoro-2-propyl]-5-penta decafluoro-heptyl benzene, 1,4 bis (aminomethyl) cyclohexane and perfluorotetradecane.
Claim 50
Independent Claim
260 words
A method of depositing a metal on a surface, capable of retaining thereon a colloidal species, which comprises: (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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b 1 ) 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.
Claim 51
Independent Claim
260 words
A method of depositing a metal on a surface, capable of retaining thereon a colloidal species, which comprises: (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 R 1 , R 2 , R 3 , R 4 , R 5 and R 6 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 (a 1 ) a colloidal species capable of reducing an activating metal ion to an activating metal, and (b 1 ) 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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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |