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US3898352A Expired / Lapsed US ⏱️ 0.0 years remaining

Plastic plating process and solution therefor

Assignee: Motorola Solutions Inc
•
Filing: 1973-12-26
•
Granted: 1975-08-05
•
Expires: 1993-12-26
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Abstract

Abstract A process for the plating of a non-metallic material, such as polyethylene or polypropylene strip, which includes the step of immersing said material in an alcohol solution containing boron, phosphorous and a metal selected from the group consisting of gold, palladium, rhodium and platinum. The metal film forms adherently on the strip. The solution is prepared by mixing phosphorous pentoxide in an alcohol solvent. The dissolution of the phosphorous pentoxide is exothermic and the temperature of the solution will rise during the reaction. Then, boric anhydride and a salt of gold, palladium, rhodium or platinum is added. The solution appears to strip any contamination while depositing a layer of the gold, platinum, rhodium or palladium onto the surface of the non-metallic part. The process is particularly advantageous for preparing metallized strips for use during semiconductor device assembly.

Inventors

  • 👤 Dervin L Flowers

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 06:07
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 86 words
A PROCESS OF PLATING NON-METALLIC MATERIAL WHICH CONSISTIS OF THE STEP OF COATING THE MATERIAL WITH A COMPLEX SOLUTION CONSISTING ESSENTIALLY OF 1 TO 30 GRAMS PER LITER PHOSPHOROUS PENTOXIDE, 1 TO 60 GRAMS PER LITER BORIC ANHYDRIDE, 0.01 TO 10.0 GRAMS PER LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GOLD, PLATINUM, PALLADIUM AND RHODIUM SALTS AND OXIDE, AND THE BALANCE A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, PROPYL, ISOPROPYL, BUTYL, AND ISOBUTYL ALCOHOL, ETHYLENE GLYCOL, AND TETRAHYDRO FURFURYL ALCOHOL.
Claim 2
Dependent Claim 86 words
A PROCESS OF PLATING NON-METALLIC MATERIAL WHICH CONSISTIS OF THE STEP OF COATING THE MATERIAL WITH A COMPLEX SOLUTION CONSISTING ESSENTIALLY OF 1 TO 30 GRAMS PER LITER PHOSPHOROUS PENTOXIDE, 1 TO 60 GRAMS PER LITER BORIC ANHYDRIDE, 0.01 TO 10.0 GRAMS PER LITER OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF GOLD, PLATINUM, PALLADIUM AND RHODIUM SALTS AND OXIDE, AND THE BALANCE A SOLVENT SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, PROPYL, ISOPROPYL, BUTYL, AND ISOBUTYL ALCOHOL, ETHYLENE GLYCOL, AND TETRAHYDRO FURFURYL ALCOHOL.
Claim 3
Dependent Claim 29 words
In a process as recited in claim 1 wherein said coating step includes immersing a semiconductor device in said complex solution for 1 - 24 hours at room temperature.
Claim 4
Dependent Claim 32 words
In a process as recited in claim 1 wherein said coating step includes covering a surface of a semiconductor device with said complex solution for 1 - 24 hours at room temperature.

References Cited (Backward Citations)

US3458344A Cited
US3463646A Cited
US3770498A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-04 1979-02-03 1979-08-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-04 1983-02-03 1983-08-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-04 1987-02-03 1987-08-05 $7700.00 Window Closed / Lapsed

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