US4670351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible printed circuits, prepared by augmentation replacement process
Assignee: Von Roll Isola USA Inc
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Filing: 1986-02-12
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Granted: 1987-06-02
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Expires: 2006-02-12
Abstract
Abstract The present invention provides flexible printed circuits prepared by (i) applying a design on a silicone-impregnated fabric substrate with a printing ink comprising a mixture of (a) a curable silicone composition and (b) an effective amount of at least one finely divided metal powder; (ii) at least partially curing said silicone composition; and (iii) depositing a conductive metal on the surface of said printing ink.
Inventors
- 👤 John J. Keane
- 👤 Thomas P. Wacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:02
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/245; H05K3/246; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/09; H05K1/092; H05K1/095; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12035; Y10T428/12049; Y10T428/24; Y10T428/24802; Y10T428/24926; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
A flexible printed circuit prepared by a method comprising: (i) applying a design on the silicone-impregnated fabric substrate with a printing ink comprising a mixture of (a) a curable silicone composition and (b) an effective amount of at least one finely divided metal powder; (ii) at least partially curing said silicone composition; and (iii) depositing a conductive metal on the surface of said printing ink.
Claim 2
Dependent Claim
65 words
A flexible printed circuit prepared by a method comprising: (i) applying a design on the silicone-impregnated fabric substrate with a printing ink comprising a mixture of (a) a curable silicone composition and (b) an effective amount of at least one finely divided metal powder; (ii) at least partially curing said silicone composition; and (iii) depositing a conductive metal on the surface of said printing ink.
Claim 3
Dependent Claim
15 words
A flexible printed circuit as in claim 1, wherein the substrate is silicone-impregnated glass cloth.
Claim 4
Dependent Claim
25 words
A flexible printed circuit as in claim 1 or 2, wherein the curable silicone composition of the printing ink is an addition curable silicone composition.
Claim 5
Dependent Claim
25 words
A flexible printed circuit as in claim 1 or 2, wherein the curable silicone composition of the printing ink is a heat curable silicone composition.
Claim 6
Dependent Claim
25 words
A flexible printed circuit as in claim 1 or 2, wherein the curable silicone composition of the printing ink is a condensation curable silicone composition.
Claim 7
Dependent Claim
23 words
A flexible printed circuit as in claim 3, wherein the finely divided metal powder has a particle size less than about 50 microns.
Claim 8
Dependent Claim
23 words
A flexible printed circuit as in claim 4, wherein the finely divided metal powder has a particle size less than about 50 microns.
Claim 9
Dependent Claim
23 words
A flexible printed circuit as in claim 5, wherein the finely divided metal powder has a particle size less than about 50 microns.
Claim 10
Dependent Claim
23 words
A flexible printed circuit as in claim 6, wherein the finely divided metal powder is iron, nickel, or zinc or a mixture thereof.
Claim 11
Dependent Claim
23 words
A flexible printed circuit as in claim 7, wherein the finely divided metal powder is iron, nickel, or zinc or a mixture thereof.
Claim 12
Dependent Claim
23 words
A flexible printed circuit as in claim 8, wherein the finely divided metal powder is iron, nickel, or zinc or a mixture thereof.
Claim 13
Dependent Claim
14 words
A flexible printed circuit as in claim 9, wherein the conductive metal is copper.
Claim 14
Dependent Claim
13 words
A flexible circuit as in claim 10, wherein the conductive metal is copper.
Claim 15
Dependent Claim
14 words
A flexible printed circuit as in claim 11, wherein the conductive metal is copper.
Claim 16
Dependent Claim
21 words
A flexible printed circuit as in claim 1, wherein the design is applied to the silicone-impregnated fabric substrate by screen printing.
Claim 17
Dependent Claim
28 words
A flexible printed circuit as in claim 1, wherein the finely divided metal powder is from about 60% to about 80% by volume of the printing ink mixture.
Claim 18
Dependent Claim
26 words
A flexible printed circuit as in claim 1, wherein the conductive metal is deposited on the surface of the printing ink by an augmentation replacement reaction.
Claim 19
Dependent Claim
26 words
A flexible printed circuit as in claim 1, wherein the conductive metal is deposited on the surface of the printing ink by an electroless plating process.
Claim 20
Dependent Claim
25 words
A flexible printed circuit as in claim 1, wherein the conductive metal is deposited on the surface of the printing ink by an electrodeposition process.
Claim 21
Independent Claim
65 words
A method for making a flexible printed circuit, comprising: (i) applying a design on a silicone-impregnated fabric substrate with a printing ink comprising a mixture of (a) a curable silicone composition and (b) an effective amount of at least one finely divided metal powder; (ii) at least partially curing said silicone composition; and (iii) depositing a conductive metal on the surface of said printing ink.
Claim 22
Independent Claim
65 words
A method for making a flexible printed circuit, comprising: (i) applying a design on a silicone-impregnated fabric substrate with a printing ink comprising a mixture of (a) a curable silicone composition and (b) an effective amount of at least one finely divided metal powder; (ii) at least partially curing said silicone composition; and (iii) depositing a conductive metal on the surface of said printing ink.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |