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US3949121A
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Method of forming a hydrophobic surface
Assignee: AT&T Inc
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Filing: 1973-12-12
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Granted: 1976-04-06
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Expires: 1993-12-12
Abstract
Abstract A method of forming a hydrophobic surface is disclosed. The method comprises coating a substrate surface with a stable aqueous colloidal solution, formed by a controlled hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof. The coated surface is then exposed to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed surface regions hydrophobic.
Inventors
- 👤 John Thomas Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/185; G; G03; G03C; G03C1/00; G03C1/705
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A method of forming a conductive pattern on a nonconductive surface, which comprises: a. coating the surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A, to form a coated surface of hydrophilic character; b. selectively exposing said coated hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1,800A to 3,300A to render regions thereof hydrophobic and to delineate an ink retaining surface pattern corresponding to the conductive pattern; and c. applying a conductive ink to said selectively exposed surface to deposit said conductive ink on said delineated pattern.
Claim 2
Independent Claim
137 words
A method of forming a conductive pattern on a nonconductive surface, which comprises: a. coating the surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A, to form a coated surface of hydrophilic character; b. selectively exposing said coated hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1,800A to 3,300A to render regions thereof hydrophobic and to delineate an ink retaining surface pattern corresponding to the conductive pattern; and c. applying a conductive ink to said selectively exposed surface to deposit said conductive ink on said delineated pattern.
Claim 3
Dependent Claim
40 words
The method as defined in claim 1 wherein said conductive ink comprises activating metal nuclei; and which further comprises: immersing said conductive ink-deposited surface into an electroless bath catalyzed by said activating metal nuclei to deposit an electroless metal thereon.
Claim 4
Dependent Claim
15 words
The method as defined in claim 1 which further comprises electroplating the resulting conductive pattern.
Claim 5
Dependent Claim
167 words
In an improved method of forming a metallic pattern on a dielectric surface comprising the steps of: a. sensitizing the surface with an aqueous sensitizer solution; b. activating the activated surface with an aqueous activating solution; and c. treating the activated surface with an electroless metal deposition solution to deposit an electroless metal thereon, wherein the improvement comprises: a 1 . prior to step (a) coating a surface with a stable aqueous colloidal wetting sol, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A, to form a coated surface of hydrophilic character; and b 1 . prior to step (a) selectively exposing said coated hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render regions thereof hydrophobic and to delineate a hydrophilic surface pattern corresponding to the metallic pattern.
Claim 6
Dependent Claim
167 words
In an improved method of forming a metallic pattern on a dielectric surface comprising the steps of: a. sensitizing the surface with an aqueous sensitizer solution; b. activating the activated surface with an aqueous activating solution; and c. treating the activated surface with an electroless metal deposition solution to deposit an electroless metal thereon, wherein the improvement comprises: a 1 . prior to step (a) coating a surface with a stable aqueous colloidal wetting sol, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A, to form a coated surface of hydrophilic character; and b 1 . prior to step (a) selectively exposing said coated hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render regions thereof hydrophobic and to delineate a hydrophilic surface pattern corresponding to the metallic pattern.
Claim 7
Independent Claim
83 words
A method of rendering at least a portion of a surface hydrophobic which comprises: exposing to a source of ultraviolet radiation, having a wavelength ranging from 1800A to 3300A, at least a portion of the surface coated with a stable aqueous colloidal wetting sol, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A.
Claim 8
Independent Claim
83 words
A method of rendering at least a portion of a surface hydrophobic which comprises: exposing to a source of ultraviolet radiation, having a wavelength ranging from 1800A to 3300A, at least a portion of the surface coated with a stable aqueous colloidal wetting sol, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, said particles having a size within the range of 10A to 10,000A.
References Cited (Backward Citations)
US3562005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |