US4711822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal core printed circuit boards
Assignee: Honeywell International Inc
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Filing: 1986-01-15
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Granted: 1987-12-08
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Expires: 2006-01-15
Abstract
Abstract Disclosed is a method of making a printed circuit board by exposing in a circuit pattern the polymeric surface of a conductive substrate coated with a polymer selected from the group consisting of polyimides, polyamide-imides, polyester-amide-imides, polysulfones, polyphenylene sulfides, and polyphenylene oxides, to an ion beam at an energy of about 50 KeV to about 2 MeV and a fluence of about 1015 to 1018 ions/cm2. The surface is then wet blasted and the portions of the polymeric surface that have been exposed to the ion beam are electrolessly plated with a metal such as nickel or copper. Also disclosed is a coated substrate comprising a metal or conductive surface and an imide polymeric coating on the surface which can be electrophoretically deposited, a portion of which has been exposed to an ion beam.
Inventors
- 👤 Wolfgang J. Choyke
- 👤 Susan Wood
- 👤 Luciano C. Scala
- 👤 Melvin P. Zussman
- 👤 Leslie A. Doggrell
- 👤 Janet S. Lauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K2203/00; H05K2203/13; H05K2203/1333; H05K2203/135; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S430/00; Y10S430/143; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31721
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
101 words
A method of making a printed circuit board comprising: (A) exposing a portion of a polymeric film applied by a conventional technique other than spin coating to an ion beam at an energy of about 50 KeV to about 2 MeV, at a fluence of about 10 15 to about 10 18 ions/cm 2 , where said polymeric film is selected from the group consisting of polyimides, polyamideimides, polyester-amide-imides, polysulfones, polyphenylene sulfides, and polyphenylene oxides; (B) wet blasting said polymeric film; and (C) electrolessly plating, with a metal, the portions of said polymeric film that were exposed to said ion beam.
Claim 2
Independent Claim
101 words
A method of making a printed circuit board comprising: (A) exposing a portion of a polymeric film applied by a conventional technique other than spin coating to an ion beam at an energy of about 50 KeV to about 2 MeV, at a fluence of about 10 15 to about 10 18 ions/cm 2 , where said polymeric film is selected from the group consisting of polyimides, polyamideimides, polyester-amide-imides, polysulfones, polyphenylene sulfides, and polyphenylene oxides; (B) wet blasting said polymeric film; and (C) electrolessly plating, with a metal, the portions of said polymeric film that were exposed to said ion beam.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said polymeric film is a coating on a conductive substrate.
Claim 4
Dependent Claim
12 words
A method according to claim 2 wherein said conductive substrate is aluminum.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein said polymeric film is at least about 0.5 mils thick.
Claim 6
Dependent Claim
19 words
A method according to claim 1 wherein said polymeric film is an electrophoretically deposited coating on a conductive substrate.
Claim 7
Dependent Claim
29 words
A method according to claim 1 wherein said polymeric film is exposed to said ion beam in a circuit pattern obtained by placing a mask over said polymeric coating.
Claim 8
Dependent Claim
28 words
A method according to claim 1 wherein said polymeric film is exposed to said ion beam in a circuit pattern obtained by using a finely focused ion beam.
Claim 9
Dependent Claim
13 words
A method according to claim 1 wherein said ion beam uses argon ions.
Claim 10
Dependent Claim
22 words
A method according to claim 1 wherein said polymeric film is electrolessly coated within seven days after exposure to said ion beam.
Claim 11
Dependent Claim
18 words
A method according to claim 1 wherein said wet blasting lasts from about 5 to about 60 seconds.
Claim 12
Dependent Claim
16 words
A method according to claim 1 wherein said exposed polymeric film is electrolessly plated with copper.
Claim 13
Dependent Claim
19 words
A method according to claim 1 including the additional last step of electrodepositing metal on said electrolessly plated metal.
Claim 14
Dependent Claim
14 words
A method according to claim 1 wherein said polymeric film is an imide-containing polymer.
Claim 15
Dependent Claim
10 words
A product made according to the method of claim 1.
Claim 16
Independent Claim
132 words
A method of making a metal core printed circuit board comprising: (A) electrophoretically coating a metal substrate with a polymer selected from the group consisting of polyimides, polyamide-imides, polyester-amide-imides, and mixtures thereof, to a thickness of about 0.5 to about 5 mils; (B) exposing said polymer on said substrate to an ion beam in a circuit pattern, said ion beam having an energy of about 50 KeV to about 2 MeV and a fluence on said surface of about 10 15 to about 10 18 ions/cm 2 ; (C) wet blasting said polymer on said surface for about 5 to about 60 seconds; and (D) within about seven days after exposing said polymer to said ion beam, electrolessly plating a metal on the portions of said polymer exposed to said ion beam.
Claim 17
Independent Claim
132 words
A method of making a metal core printed circuit board comprising: (A) electrophoretically coating a metal substrate with a polymer selected from the group consisting of polyimides, polyamide-imides, polyester-amide-imides, and mixtures thereof, to a thickness of about 0.5 to about 5 mils; (B) exposing said polymer on said substrate to an ion beam in a circuit pattern, said ion beam having an energy of about 50 KeV to about 2 MeV and a fluence on said surface of about 10 15 to about 10 18 ions/cm 2 ; (C) wet blasting said polymer on said surface for about 5 to about 60 seconds; and (D) within about seven days after exposing said polymer to said ion beam, electrolessly plating a metal on the portions of said polymer exposed to said ion beam.
Claim 18
Dependent Claim
10 words
A produce made according to the method of claim 15.
Claim 19
Dependent Claim
38 words
A coated substrate comprising: (A) a metal substrate; and (B) an imide-containing polymeric coating applied by a conventional technique other than spin coating on said substrate, only a portion of which has been exposed to an ion beam.
Claim 20
Dependent Claim
38 words
A coated substrate comprising: (A) a metal substrate; and (B) an imide-containing polymeric coating applied by a conventional technique other than spin coating on said substrate, only a portion of which has been exposed to an ion beam.
Claim 21
Dependent Claim
31 words
A coated substrate comprising: (A) a conductive surface; and (B) an electrophoretically deposited imide polymeric coating on said surface, only a portion of which has been exposed to an ion beam.
Claim 22
Dependent Claim
31 words
A coated substrate comprising: (A) a conductive surface; and (B) an electrophoretically deposited imide polymeric coating on said surface, only a portion of which has been exposed to an ion beam.
Claim 23
Dependent Claim
43 words
A coated substrate comprising: (A) a conductive surface; and (B) an imide polymeric coating applied by a conventional technique other than spin coating on said surface, only a portion of which has been exposed to an ion beam, then treated by wet blasting.
Claim 24
Dependent Claim
43 words
A coated substrate comprising: (A) a conductive surface; and (B) an imide polymeric coating applied by a conventional technique other than spin coating on said surface, only a portion of which has been exposed to an ion beam, then treated by wet blasting.
Claim 25
Dependent Claim
15 words
A substrate according to claim 19 including a metal coating electrolessly deposited over said portion.
Claim 26
Dependent Claim
12 words
A method according to claim 1 wherein said polymeric film is free-standing.
Claim 27
Dependent Claim
19 words
A coated substrate according to claim 19 wherein said portion exposed to said ion beam forms a circuit pattern.
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |