US3881049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for depositing copper layers on shaped articles of a polyimide
Assignee: Kalle GmbH and Co KG
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Filing: 1972-12-05
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Granted: 1975-04-29
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Expires: 1992-12-05
Abstract
Abstract This invention relates to a process for depositing a copper layer on a surface of a shaped article of a polyimide, which process comprises A. TREATING THE SURFACE WITH A SOLUTION OF A NOBLE METAL SALT AND A HALOGENATED ALKANOIC ACID, AND THEN DRYING THE SURFACE AT AN ELEVATED TEMPERATURE, B. TREATING THE SURFACE WITH A SOLUTION INCLUDING A REDUCING AGENT BUT WHICH DOES NOT INCLUDE A HALOGENATED ALKANOIC ACID, STEPS (A) AND (B) BEING CARRIED OUT IN EITHER ORDER, AND THEN C. TREATING THE SURFACE WITH A SOLUTION CONTAINING A COPPER SALT AND A REDUCING AGENT.
Inventors
- 👤 Wilhelm Brandt
- 👤 Irmgard Bindrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:58
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/30; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
20 words
A POLYIMIDE FILM HAVING ON ITS SURFACE A COPPER LAYER WHICH CANNOT BE SEPARATED FROM SAID SURFACE BY MECHANICAL MEANS.
Claim 2
Dependent Claim
20 words
A POLYIMIDE FILM HAVING ON ITS SURFACE A COPPER LAYER WHICH CANNOT BE SEPARATED FROM SAID SURFACE BY MECHANICAL MEANS.
Claim 3
Dependent Claim
106 words
A PROCESS FOR DEPOSITING A COPPER LAYER ON A SURFACE OF A SHAPED ARTICLE OF A POLYAMIDE, WHICH PROCESS COMPRISES A. TREATING THE SURFACE WITH A SOLUTION OF A NOBLE METAL SALT AND ABOUT 5 TO 25% BY WEIGHT OF A HALOGENATED ALKANOIC ACID, AND THEN DRYING THE SURFACE AT A TEMPERATURE IN THE RANGE OF ABOU 120*TO 130*C, B. TREATING THE SURFACE WITH A SOLUTION INCLUDING A REDUCING AGENT BUT WHICH DOES NOT INCLUDE A HALOGENATED ALKANOIC ACID, STEPS (A) AND (B) BEING CARRIER OUT IN EITHER ORDER, AND THEN C. TREATING THE SURFACE WITH A SOLUTION CONTAINING A COPPER SALT AND A REDUCING AGENT.
Claim 4
Dependent Claim
106 words
A PROCESS FOR DEPOSITING A COPPER LAYER ON A SURFACE OF A SHAPED ARTICLE OF A POLYAMIDE, WHICH PROCESS COMPRISES A. TREATING THE SURFACE WITH A SOLUTION OF A NOBLE METAL SALT AND ABOUT 5 TO 25% BY WEIGHT OF A HALOGENATED ALKANOIC ACID, AND THEN DRYING THE SURFACE AT A TEMPERATURE IN THE RANGE OF ABOU 120*TO 130*C, B. TREATING THE SURFACE WITH A SOLUTION INCLUDING A REDUCING AGENT BUT WHICH DOES NOT INCLUDE A HALOGENATED ALKANOIC ACID, STEPS (A) AND (B) BEING CARRIER OUT IN EITHER ORDER, AND THEN C. TREATING THE SURFACE WITH A SOLUTION CONTAINING A COPPER SALT AND A REDUCING AGENT.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 2, wherein an aqueous solution of the noble metal salt and the halogenated alkanoic acid is used.
Claim 6
Dependent Claim
19 words
A process as claimed in claim 2, wherein the concentration of the acid is 10 to 15% by weight.
Claim 7
Dependent Claim
22 words
A process as claimed in claim 2, wherein the drying is carried out for a period of from 1 to 3 minutes.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 2, wherein each of the treatment solutions used in steps (a) and (b) contains a wetting agent.
Claim 9
Dependent Claim
23 words
A process as claimed in claim 2, wherein the solution used in step (a) contains about 0.01 to 2% by weight polyvinyl alcohol.
Claim 10
Dependent Claim
30 words
A process as claimed in claim 2, wherein each of the treatments of steps (a) and (b) is carried out for a period of from 10 seconds to 10 minutes.
Claim 11
Dependent Claim
22 words
A process as claimed in claim 2, wherein the surface to be treated has previously been cleaned or subjected to surface hydrolysis.
Claim 12
Dependent Claim
29 words
A process as claimed in claim 2, wherein, after step (c), the thickness of the layer of copper is increased by electrolytic deposition of copper on the existing layer.
Claim 13
Dependent Claim
28 words
A process as claimed in claim 2, wherein the polyimide is a condensation product of at least one aromatic diamine with at least one aromatic tetracarboxylic acid dianhydride.
Claim 14
Dependent Claim
15 words
A process as claimed in claim 2, wherein the shaped article is an injection-molded article.
Claim 15
Dependent Claim
14 words
A process as claimed in claim 2, wherein the shaped article is a film.
Claim 16
Dependent Claim
17 words
A process as claimed in claim 2, wherein the halogenated alkanoic acid is a chlorinated acetic acid.
Claim 17
Dependent Claim
13 words
A process as claimed in claim 14, wherein the acid is trichloracetic acid.
Claim 18
Dependent Claim
20 words
A process as claimed in claim 2, wherein the drying is carried out at a temperature not greater than 150*C.
Claim 19
Dependent Claim
13 words
A process as claimed in claim 16, wherein the temperature is 120*to 130*C.
Claim 20
Dependent Claim
17 words
A process as claimed in claim 2, wherein the reducing agent in step (b) is tin-II chloride.
Claim 21
Dependent Claim
37 words
A process as claimed in claim 18, wherein the solution used in step (b) is an aqueous solution, containing hydrochloric acid, of tin-II chloride, the concentration of the tin-II chloride being between 0.1 and 10% by weight.
Claim 22
Dependent Claim
14 words
A process as claimed in claim 2, wherein the reducing agent is hydrazine hydrate.
Claim 23
Dependent Claim
35 words
A process as claimed in claim 20, wherein the solution used in step (b) is an alkaline aqueous solution of hydrazine hydrate, the concentration of the hydrazine hydrate being between 0.1 and 5% by weight.
Claim 24
Dependent Claim
21 words
A process as claimed in claim 2, wherein the noble metal salt is a salt of platinum, palladium, gold or silver.
Claim 25
Dependent Claim
13 words
A process as claimed in claim 22, wherein the salt is palladium chloride.
Claim 26
Dependent Claim
23 words
A process as claimed in claim 23, wherein the solution used in step (a) contains 0.001 to 5% by weight of palladium chloride.
Claim 27
Dependent Claim
16 words
A process as claimed in claim 24, wherein the concentration is 0.005 to 0.5% by weight.
References Cited (Backward Citations)
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |