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Direct metallization process
electrolytic refining, comprising holding the cathode plate on which the metal is electrodeposited; and blowing heated air toward the cathode plate and the electrodeposited metal thereon to separate the electrodeposited metal from the cathode plate; wherein the electrodeposited metal is selected from the group consisting of tin, indium, and lead.
Direct Metallization Process U.S. Patent5,376,248. Dec. 27, 1994 J.8. ConrodandG.R.S&Me, assignors to EnthoneOld/ Inc., Msf Haven, Conn.
A method for making a plastic substrate electrically conductive and electrolytically metal plating thereon comprising contacting with a noble metal-containing solution to activate the substrate; treating the activated substrate at a temperature above 65°C with an alkaline post-activator solution, which is substantially free of a reducing agent and is selected from the group consisting of solutions having a pH greater than 12 comprising an effective amount of metal ions, which undergo a disproportionation reaction during the treatment; and solutions having a pH treatment providing
a substrate resistivity of less than about 250 ohms, and greater than 13 comprising a metal ion selected from the group consisting of copper, silver, and bismuth, said treatment providing a substrate resistivity of less than 250 ohms; and electrolytically metal plating the substrate.
being chosen so as to bring the carbonate content after transferring the residual liquor back to the bath, to a carbonate content of 25-45 g/L.
Process for Recovering Zinc Phosphate U.S.PaM5,376,342. Dec. 27, 1994 M.D.Waite,Sfron9svilIa, Ohio
Method of Removing Carbonates From Plating Baths U.S. Pafenf5,376,256. Dec. 27, 1994 R. Leufwyler, Mgenwil, Swirzerland
A single-stage method for removing carbonates from a cyanide containing bath, comprising removing at least part of the bath liquid; stirring and cooling while in the metastable state until crystallization of carbonates occurs; continuing the cooling until an exothermic reaction, which is caused by the liberation of the heat of crystallization, starts at a set temperature; thereafter holding for 2-4 min at OS-1°C below the set temperature; separating the crystallized carbonates, leaving a residual liquor; and transferring the residual liquor back to the bath, the quantity of the part removed and the moment of removing
A process for recovering zinc and phosphate comprising dissolving a sludge comprising zinc, iron, and phosphate in water and phosphoric acid to form a mixture having a pH between 1.5 and 2.4, precipitating iron phosphate, and recovering a liquid comprising zinc and phosphate.
Method of Coating Ridged Plates
U.S. Patent5,376,404. Dec. 27, 1994 M.B. 7hants, Sromma, Sweden
A method for applying a liquid varnish coating over a raised conductor pattern of a printed circuit board, the method comprising providing a roll press including an applicator roll and two nip rolls forming a roll nip for transferring liquid varnish onto a printed circuit board, coating one of the
PaintOverspray and EmissionProblems?
because PCN Ins1wer twice as long as platinized titanium < > niobium is three times more con ductive than titanium, therefore better current distrihution and less power consumption c > pt clad is available in 125 & 250 microinches mesh and solid, single and double sided < > tell us your specification and we fax you quote with drawing . to confirm your need. .
The CG 100 paint overspray collection system and the CPA and PAG paint overspray media have the highest efficiency and lowest resistance of any product of this kind yet developed. For more information call l-990-325 5339. -Cost Effective High QualityCircle004on 74
reader infommtlon card
13708ZWthStreet,Jmaka%NY114~ (718) 4814871 FAX (718) 481-Q85Q
“Dependable Anodes kv Predicting Plating OuaMy ”
. -. .
L9~au CORPORATlOr
Circle 024 on reader InformatIon card
METAL FINISHING . JULY 1995
Direct Metallization Process U.S. Patent5,376,248. Dec. 27, 1994 J.8. ConrodandG.R.S&Me, assignors to EnthoneOld/ Inc., Msf Haven, Conn.
A method for making a plastic substrate electrically conductive and electrolytically metal plating thereon comprising contacting with a noble metal-containing solution to activate the substrate; treating the activated substrate at a temperature above 65°C with an alkaline post-activator solution, which is substantially free of a reducing agent and is selected from the group consisting of solutions having a pH greater than 12 comprising an effective amount of metal ions, which undergo a disproportionation reaction during the treatment; and solutions having a pH treatment providing
a substrate resistivity of less than about 250 ohms, and greater than 13 comprising a metal ion selected from the group consisting of copper, silver, and bismuth, said treatment providing a substrate resistivity of less than 250 ohms; and electrolytically metal plating the substrate.
being chosen so as to bring the carbonate content after transferring the residual liquor back to the bath, to a carbonate content of 25-45 g/L.
Process for Recovering Zinc Phosphate U.S.PaM5,376,342. Dec. 27, 1994 M.D.Waite,Sfron9svilIa, Ohio
Method of Removing Carbonates From Plating Baths U.S. Pafenf5,376,256. Dec. 27, 1994 R. Leufwyler, Mgenwil, Swirzerland
A single-stage method for removing carbonates from a cyanide containing bath, comprising removing at least part of the bath liquid; stirring and cooling while in the metastable state until crystallization of carbonates occurs; continuing the cooling until an exothermic reaction, which is caused by the liberation of the heat of crystallization, starts at a set temperature; thereafter holding for 2-4 min at OS-1°C below the set temperature; separating the crystallized carbonates, leaving a residual liquor; and transferring the residual liquor back to the bath, the quantity of the part removed and the moment of removing
A process for recovering zinc and phosphate comprising dissolving a sludge comprising zinc, iron, and phosphate in water and phosphoric acid to form a mixture having a pH between 1.5 and 2.4, precipitating iron phosphate, and recovering a liquid comprising zinc and phosphate.
Method of Coating Ridged Plates
U.S. Patent5,376,404. Dec. 27, 1994 M.B. 7hants, Sromma, Sweden
A method for applying a liquid varnish coating over a raised conductor pattern of a printed circuit board, the method comprising providing a roll press including an applicator roll and two nip rolls forming a roll nip for transferring liquid varnish onto a printed circuit board, coating one of the
PaintOverspray and EmissionProblems?
because PCN Ins1wer twice as long as platinized titanium < > niobium is three times more con ductive than titanium, therefore better current distrihution and less power consumption c > pt clad is available in 125 & 250 microinches mesh and solid, single and double sided < > tell us your specification and we fax you quote with drawing . to confirm your need. .
The CG 100 paint overspray collection system and the CPA and PAG paint overspray media have the highest efficiency and lowest resistance of any product of this kind yet developed. For more information call l-990-325 5339. -Cost Effective High QualityCircle004on 74
reader infommtlon card
13708ZWthStreet,Jmaka%NY114~ (718) 4814871 FAX (718) 481-Q85Q
“Dependable Anodes kv Predicting Plating OuaMy ”
. -. .
L9~au CORPORATlOr
Circle 024 on reader InformatIon card
METAL FINISHING . JULY 1995