US4832799A
Expired / Lapsed
US
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Process for coating at least one surface of a polyimide sheet with copper
Assignee: Parlex Corp
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Filing: 1987-07-30
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Granted: 1989-05-23
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Expires: 2007-07-30
Abstract
Abstract At least one surface of a polyimide sheet surface is coated with copper in the absence of an adhesive. The polyimide surface is treated with a one phase aqueous solution comprising an alkylene diamine; an alkali metal hydroxide and a water miscible alcohol to render the surface uniformly and substantially completely textured. The treated surface then is treated with a catalyst, coated with cobalt or nickel and then coated with copper. The laminate produced passes the IPC tests for peel strength and solder float.
Inventors
- 👤 Philip D. Knudsen
- 👤 Daniel P. Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; H05K3/10; H05K3/18; H05K3/181; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/0154; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0344; H05K2203/00; H05K2203/12; H05K2203/122; H05K3/02; H05K3/022; Y; Y10; Y10S; Y10S205/00; Y10S205/924; Y10S205/926
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
188 words
A process for coating at least one surface of a polyimide sheet with copper in the absence of an adhesive, said process comprising contacting said sheet with a one-phase solution comprising about 3 to 15 percent by weight of a diamine with the formula H 2 N(CH 2 ) n NH 2 wherein n is an integer between 2 and 6, between about 15-40 percent by weight of an alkali metal hydroxide, between about 10 and 40 percent by weight of a water miscible alcohol and the remainder of the solution water, for a time and at a temperature sufficient to render said surface uniformly and substantially completely textured, treating said surface with a catalyst to create a surface receptive to the electroless deposition of nickel or cobalt, depositing a nickel or cobalt metal layer on said receptive surface by electroless deposition to form a nickel or cobalt coated surface of said sheet, said deposited nickel or cobalt metal layer being electrically conductive, and depositing copper on said nickel or cobalt metal layer by electrolytic deposition to form at least one exposed copper coating on said polyimide sheet.
Claim 2
Dependent Claim
188 words
A process for coating at least one surface of a polyimide sheet with copper in the absence of an adhesive, said process comprising contacting said sheet with a one-phase solution comprising about 3 to 15 percent by weight of a diamine with the formula H 2 N(CH 2 ) n NH 2 wherein n is an integer between 2 and 6, between about 15-40 percent by weight of an alkali metal hydroxide, between about 10 and 40 percent by weight of a water miscible alcohol and the remainder of the solution water, for a time and at a temperature sufficient to render said surface uniformly and substantially completely textured, treating said surface with a catalyst to create a surface receptive to the electroless deposition of nickel or cobalt, depositing a nickel or cobalt metal layer on said receptive surface by electroless deposition to form a nickel or cobalt coated surface of said sheet, said deposited nickel or cobalt metal layer being electrically conductive, and depositing copper on said nickel or cobalt metal layer by electrolytic deposition to form at least one exposed copper coating on said polyimide sheet.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein said diamine is ethylenediamine.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the nickel is electrolessly deposited.
Claim 5
Dependent Claim
9 words
The process of claim 3 wherein diamine is ethylenediamine.
Claim 6
Dependent Claim
16 words
The process of claims 3 or 4 where the initial metal layer is a nickel/boron alloy.
Claim 7
Dependent Claim
16 words
The process of claims 3 or 4 where the initial metal layer is a cobalt/boron alloy.
Claim 8
Dependent Claim
16 words
The process of claims 3 or 4 where the initial metal layer is a nickel/phosphorous alloy.
Claim 9
Dependent Claim
16 words
The process of claims 3 or 4 where the initial metal layer is a cobalt/phosphorous alloy.
Claim 10
Dependent Claim
17 words
The process of claims 3 or 4 where the initial metal layer is an alloy of nickel/cobalt/boron.
Claim 11
Dependent Claim
17 words
The process of claims 3 or 4 where the initial metal layer is an alloy of nickel/cobalt/phosphorous.
Claim 12
Dependent Claim
41 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is coated directly with electrolytically deposited copper without drying between the step of depositing the electroless metal layer and the step of depositing copper.
Claim 13
Dependent Claim
20 words
The process of any one of claims 1, 2, 3 or 4 wherein said alkali metal hydroxide is potassium hydroxide.
Claim 14
Dependent Claim
20 words
The process of any one of claims 1, 2, 3 or 4 wherein said alkali metal hydroxide is sodium hydroxide.
Claim 15
Dependent Claim
26 words
The process of any one of claims 1, 2, 3 or 4 wherein said alkali metal hydroxide is a mixture of potassium hydroxide and sodium hydroxide.
Claim 16
Dependent Claim
17 words
The process of any one of claims 1, 2, 3 or 4 wherein said alcohol is methanol.
Claim 17
Dependent Claim
17 words
The process of any one of claims 1, 2, 3 or 4 wherein said alcohol is ethanol.
Claim 18
Dependent Claim
17 words
The process of any one of claims 1, 2, 3 or 4 wherein said alcohol is isopropanol.
Claim 19
Dependent Claim
17 words
The process of any one of claims 1, 2, 3 or 4 wherein said alcohol is n-propanol.
Claim 20
Dependent Claim
33 words
The process of any one of claims 1, 2, 3 or 4 wherein said alcohol is a mixture of any two alcohols selected from the group consisting of methanol, ethanol, isopropanol and n-propanol.
Claim 21
Dependent Claim
45 words
The process of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and where the metal layer is coated directly with electrolytically deposited copper without drying between the step of depositing electroless metal and the step of depositing copper.
Claim 22
Dependent Claim
45 words
The process of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and where the metal layer is coated directly with electrolytically deposited copper without drying between the step of depositing electroless metal and the step of depositing copper.
Claim 23
Dependent Claim
29 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alkali metal hydroxide is potassium hydroxide.
Claim 24
Dependent Claim
29 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alkali metal hydroxide is potassium hydroxide.
Claim 25
Dependent Claim
29 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alkali metal hydroxide is sodium hydroxide.
Claim 26
Dependent Claim
29 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alkali metal hydroxide is sodium hydroxide.
Claim 27
Dependent Claim
35 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alkali metal hydroxide is a mixture of potassium hydroxide and sodium hydroxide.
Claim 28
Dependent Claim
35 words
The process of any one of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alkali metal hydroxide is a mixture of potassium hydroxide and sodium hydroxide.
Claim 29
Dependent Claim
25 words
The process of anyone of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alcohol is methanol.
Claim 30
Dependent Claim
25 words
The process of anyone of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alcohol is methanol.
Claim 31
Dependent Claim
25 words
The process of anyone of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alcohol is ethanol.
Claim 32
Dependent Claim
25 words
The process of any of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alcohol is ethanol.
Claim 33
Dependent Claim
41 words
The process of anyone of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/boron alloy and the alcohol is a mixture of any two alcohols selected from the group consisting of methanol, ethanol, isopropanol and n-propanol.
Claim 34
Dependent Claim
41 words
The process of anyone of claims 1, 2, 3 or 4 wherein the electroless metal layer is a nickel/cobalt/boron alloy and the alcohol is a mixture of any two alcohols selected from the group consisting of methanol, ethanol, isopropanol and n-propanol.
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |