US4447471A
Expired / Lapsed
US
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Method of treating thermoplastic surfaces
Assignee: Gould Electronics Inc
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Filing: 1982-12-30
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Granted: 1984-05-08
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Expires: 2002-12-30
Abstract
Abstract Activation of thermoplastics, such as polyphenylene sulfide, polysulfone, and polyether sulfone thermoplastics by subjection thereof to bromine is disclosed. The activation process is carried out at relatively low temperatures, such as below 200° F. and illustratively, may be carried out at room temperatures. The bromine, in the illustrated embodiment, is provided in an aqueous solution with or without acids or halide salts. The halide salts, when utilized, provide control of the activity of the bromine. The process advantageously adapted for activating the thermoplastic material where it is intended that it serve as a substrate for use in accepting copper plating, as in printed circuit board manufacture.
Inventors
- 👤 Ronald A. Putt
- 👤 Alan I. Attia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
44 words
The method of treating the surface of a body formed of polyphenylene sulfide, comprising the step of subjecting the surface to a solution of bromine in an aqueous solution selected from the group consisting of an aqueous chloride solution and an aqueous bromide solution.
Claim 2
Independent Claim
44 words
The method of treating the surface of a body formed of polyphenylene sulfide, comprising the step of subjecting the surface to a solution of bromine in an aqueous solution selected from the group consisting of an aqueous chloride solution and an aqueous bromide solution.
Claim 3
Independent Claim
43 words
The method of treating the surface of a body formed of polysulfone, comprising the step of subjecting the surface to a solution of bromine in an aqueous solution selected from the group consisting of an aqueous chloride solution and an aqueous bromide solution.
Claim 4
Independent Claim
43 words
The method of treating the surface of a body formed of polysulfone, comprising the step of subjecting the surface to a solution of bromine in an aqueous solution selected from the group consisting of an aqueous chloride solution and an aqueous bromide solution.
Claim 5
Independent Claim
81 words
The method of treating the surface of a substrate board body formed of polyphenylene sulfide, comprising the step of subjecting said surface to a solution of bromine in an aqueous solution selected from any one of the group consisting of quaternary ammonium chloride, quaternary ammonium bromide, Group I chloride, Group II chloride, Group III chloride, Group I bromide, Group II bromide, and Group III bromide salt solution to effect a treatment of said surface suitable for said subsequent electroless metal deposition.
Claim 6
Independent Claim
81 words
The method of treating the surface of a substrate board body formed of polyphenylene sulfide, comprising the step of subjecting said surface to a solution of bromine in an aqueous solution selected from any one of the group consisting of quaternary ammonium chloride, quaternary ammonium bromide, Group I chloride, Group II chloride, Group III chloride, Group I bromide, Group II bromide, and Group III bromide salt solution to effect a treatment of said surface suitable for said subsequent electroless metal deposition.
Claim 7
Dependent Claim
44 words
The method of treating the surface of a polyphenylene sulfide body of claim 1 wherein the bromine is present in the amount of approximately 1-50 grams per liter in a solution which is approximately 1-3 molar with respect to the chloride or bromide salts.
Claim 8
Dependent Claim
43 words
The method of treating the surface of a polysulfone body of claim 2 wherein the bromine is present in the amount of approximately 1-50 grams per liter in a solution which is approximately 1-3 molar with respect to the chloride or bromide salts.
Claim 9
Dependent Claim
46 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 wherein the bromine is present in the amount of approximately 1-50 grams per liter in a solution which is approximately 1-3 molar with respect to the chloride or bromide salts.
Claim 10
Dependent Claim
45 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 wherein the bromine is present as a liquid complex in the amount of up to approximately 1000 grams per liter of said liquid complex with the quaternary ammonium salt.
Claim 11
Dependent Claim
36 words
The method of treating the surface of a polyphenylene sulfide body of claim 1 wherein the step of subjecting the surface to said solution is carried out at a temperature of less than approximately 200° F.
Claim 12
Dependent Claim
35 words
The method of treating the surface of a polysulfone body of claim 2 wherein the step of subjecting the surface to said solution is carried out at a temperature of less than approximately 200° F.
Claim 13
Dependent Claim
38 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 wherein the step of subjecting the surface to said solution is carried out at a temperature of less than approximately 200° F.
Claim 14
Dependent Claim
24 words
The method of treating the surface of a polyphenylene sulfide body of claim 1 wherein said treatment of the surface effects an etching thereof.
Claim 15
Dependent Claim
23 words
The method of treating the surface of a polysulfone body of claim 2 wherein said treatment of the surface effects an etching thereof.
Claim 16
Dependent Claim
26 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 wherein said treatment of the surface effects an etching thereof.
Claim 17
Dependent Claim
36 words
The method of treating the surface of a polyphenylene sulfide body of claim 1 including the further step of degreasing said surface prior to the step of subjecting the surface to the aqueous solution of bromide.
Claim 18
Dependent Claim
35 words
The method of treating the surface of a polysulfone body of claim 2 including the further step of degreasing said surface prior to the step of subjecting the surface to the aqueous solution of bromide.
Claim 19
Dependent Claim
38 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 including the further step of degreasing said surface prior to the step of subjecting the surface to the aqueous solution of bromide.
Claim 20
Dependent Claim
29 words
The method of treating the surface of a polyphenylene sulfide body of claim 1 including the further step of depositing a thin layer of electroless copper on said surface.
Claim 21
Dependent Claim
28 words
The method of treating the surface of a polysulfone body of claim 2 including the further step of depositing a thin layer of electroless copper on said surface.
Claim 22
Dependent Claim
31 words
The method of treating the surface of a polyphenylene sulfide substrate board body of claim 3 including the further step of depositing a thin layer of electroless copper on said surface.
References Cited (Backward Citations)
US3489590A
Cited
US3560241A
Cited
US3869303A
Cited
US4125649A
Cited
SU755887A1
Cited
US4339303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |