US4933204A
Expired / Lapsed
US
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Method of producing a gold film
Assignee: Boeing North American Inc
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Filing: 1988-09-23
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Granted: 1990-06-12
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Expires: 2008-09-23
Abstract
Abstract A gold(III) acetate is formed by dissolving gold(III) hydroxide in glacial acetic acid. This solution containing gold(III) acetate can be used to form a gold-containing film by heating it above about 60° C. and then casting it to form a film. Gold can be deposited from the film by heating it to about 175° C. to decompose the film. In this manner, a line or pattern of conductive gold can be formed by heating selected portions of the film with a laser.
Inventors
- 👤 Leslie F. Warren, Jr.
- 👤 Patricia H. Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/01; H10W70/05; C; C22; C22B; C22B11/00; C22B11/04; H05; H05K; H05K3/00; H05K3/10; H05K3/105
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A method of producing a gold-containing film, comprising the steps of: dissolving gold(III) hydroxide in glacial acetic acid heated to a temperature of about 60° C.; and casting an amorphous film of the heated solution of gold(III) hydroxide and glacial acetic acid.
Claim 2
Independent Claim
42 words
A method of producing a gold-containing film, comprising the steps of: dissolving gold(III) hydroxide in glacial acetic acid heated to a temperature of about 60° C.; and casting an amorphous film of the heated solution of gold(III) hydroxide and glacial acetic acid.
Claim 3
Independent Claim
55 words
A method of producing a film of gold, comprising the steps of: dissolving gold(III) hydroxide in glacial acetic acid heated to a temperature of about 60° C.; casting an amorphous film of the heated solution of gold(III) hydroxide and glacial acetic acid; and heating the film to a temperature of at least about 177° C.
Claim 4
Independent Claim
55 words
A method of producing a film of gold, comprising the steps of: dissolving gold(III) hydroxide in glacial acetic acid heated to a temperature of about 60° C.; casting an amorphous film of the heated solution of gold(III) hydroxide and glacial acetic acid; and heating the film to a temperature of at least about 177° C.
Claim 5
Dependent Claim
33 words
The method of claim 2, further comprising the step of heating the film to a temperature in the range of about 177° to 260° C., thereby producing a non-coherent film with low conductivity.
Claim 6
Dependent Claim
31 words
The method of claim 2, further comprising the step of heating the film to a temperature of at least about 260° C., thereby producing a coherent and highly conductive gold film.
Claim 7
Independent Claim
104 words
A method of producing a line of gold on a substrate, comprising the steps of: preparing precipitated hydrous gold(III) hydroxide; dissolving the gold(III) hydroxide in glacial acetic acid, thereby producing a solution of gold(III) acetate in glacial acetic acid solvent; heating the solution of gold(III) acetate to a temperature of about 60° C.; casting the heated solution of gold(III) acetate onto a substrate; evaporating excess solvent to form an amorphous film of gold(III) acetate on the substrate; and traversing a line on the film with a laser beam to heat the film to a temperature of at least about 177° C. along the line.
Claim 8
Independent Claim
104 words
A method of producing a line of gold on a substrate, comprising the steps of: preparing precipitated hydrous gold(III) hydroxide; dissolving the gold(III) hydroxide in glacial acetic acid, thereby producing a solution of gold(III) acetate in glacial acetic acid solvent; heating the solution of gold(III) acetate to a temperature of about 60° C.; casting the heated solution of gold(III) acetate onto a substrate; evaporating excess solvent to form an amorphous film of gold(III) acetate on the substrate; and traversing a line on the film with a laser beam to heat the film to a temperature of at least about 177° C. along the line.
Claim 9
Dependent Claim
42 words
The method of claim 5, wherein the step of heating the film with a laser beam comprises heating the film to a temperature of at least about 260° C., thereby forming a coherent and highly conductive line of gold on the substrate.
Claim 10
Dependent Claim
32 words
The method of claim 6, further comprising the step of washing the film with solvent to remove the unheated gold(III) acetate film, thereby leaving only the line of gold on the substrate.
References Cited (Backward Citations)
US3458476A
Cited
US3576620A
Cited
US3778252A
Cited
US4484992A
Cited
US4714627A
Cited
US4615736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |