composite electroless plating compositions

2
comprising treating the substrate with an potassium ion, 50 g/L saturation of boric effective amount of a stilbene-based fluo- acid, 30-45 g/L of formate ion, S-30 g/L of rescent brightener to sensitize the substrate bromide ion, and 75-250 ppm of a wetting and thereafter contacting with an elec- agent, the solution being substantially free troless copper plating solution. of ammonium ion. Thickness Measurement Gauge U.S. Pafent5,293,132. Mar. 8, 1994 F.J. Koch, assignor to DeFelsko Corp., Ogdensburg, N.K A gauge for measuring the thickness of a coating on a substrate of an element, comprising a probe assembly for contacting a substrate having a coating; transducer means for providing a usable output in response to the thickness of the coating; and a housing encircling the probe assem- bly. Trivalent Chromium Bath U.S. Pafenf5,294,328. Mar. 15, 1994 G. E. Shahin, assignor to E/f A&hem Nodh America Inc., PhiIadeIphk? An improved solution for electroplating chromium and chromium alloy, comprising an electroplating solution having 5-60 g/L of trivalent chromium ion, 200-300 g/L of Powder Coating System U.S. Patent5,298,037. Mar. 22, 1994 D. Se&r and H. Holler, assignors to Gema Volsfafic AG, St. Gal/en, Switzerland An electrostatic powder spray coating system for car bodies. Pretreatment Process For Tin- Lead Plating U.S. Patent 5296,268. Mar. 22, 1994 R.A. lantosca, assignor to Shipley Co. Inc., Marlbor- ough, Mass. A process for plating a tin-lead alloy on cupreous substrates by displacement plat- ing from an immersion plating solution having a pH varying between 0.0 and 1.5 containing dissolved tin and lead salts, said process comprising pretreatment by contact with a solution containing an acid pH adjustor followed by contact with the immersion plating solution. Cheaper Than Racking Better Than Barrels VIBRATORYPLATING ideal for connectors, diodes, ICs -and other small delicate parts 0 0 ?? Shorter plating time No deformed parts Uniform deposition No racking cost Reduced overplate Automatic & manual production VIBARREL & OSCILLANT units for all production needs _ I Madison Street z East Rutherford, NJ 07073 - Tel: (20 I ) 773-8686 Fax: (20 I) 773-8797 Y Telex: 291470 ECI Circle 018 on reader information card Electroless Copper Plating Bath U.S. Patent 5298,058. Mar. 29, 1994 F. Ma&i and Y Yamemoto, assignors to C. Uyemura 8 Co. LM., Osaka, Japan An electroless copper plating bath com- prising a water-soluble salt of copper, a complexing agent, and a reducing agent consisting of a phosphorous acid or a phosphite, said bath having an acidic pH. Plural-Component Spray Gun U.S. Patent $299,740. Apr. 5, 1994 J.D. Bert, assignor to Binks Manufacturing Co., Frank/in Park, 111. A plural-component mixing and dis- pensing spray gun, comprising a gun body, an airless tip, and means for intermittently feeding streams of reactant liquids. Composite Electroless Plating Compositions U.S. Patent 5,300,330. Apr. 5, 1994 N. Fekfsfein and D. Lindsay, assignors to Surface Techno/ogyInc., Trenton, N.J. An improved electroless plating process including the step of contacting a substrate with a composition comprising a source of Clean paint hangers and hooks the easy way with a Controlled PyrolysiP Furnace. Paint hangers being loaded for furnace cleaning. ?? Eliminates chemical strippers ?? Improves transfer efficiency ?? Pollution-free ?? Lowers labor cost Send us a sample for a FREE test cleaning! OLLUTION 2677 Freewood Drive Dallas, Texas 75220 RODUCTS CO. (214) 358-l 539 Fax (214) 358-3379 Circle 058 on reader information card METAL FINISHING . MARCH 1995 83

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Page 1: Composite electroless plating compositions

comprising treating the substrate with an potassium ion, 50 g/L saturation of boric effective amount of a stilbene-based fluo- acid, 30-45 g/L of formate ion, S-30 g/L of rescent brightener to sensitize the substrate bromide ion, and 75-250 ppm of a wetting and thereafter contacting with an elec- agent, the solution being substantially free troless copper plating solution. of ammonium ion.

Thickness Measurement Gauge U.S. Pafent5,293,132. Mar. 8, 1994 F.J. Koch, assignor to DeFelsko Corp., Ogdensburg, N.K

A gauge for measuring the thickness of a coating on a substrate of an element, comprising a probe assembly for contacting a substrate having a coating; transducer means for providing a usable output in response to the thickness of the coating; and a housing encircling the probe assem- bly.

Trivalent Chromium Bath U.S. Pafenf5,294,328. Mar. 15, 1994 G. E. Shahin, assignor to E/f A&hem Nodh America Inc., PhiIadeIphk?

An improved solution for electroplating chromium and chromium alloy, comprising an electroplating solution having 5-60 g/L of trivalent chromium ion, 200-300 g/L of

Powder Coating System U.S. Patent5,298,037. Mar. 22, 1994 D. Se&r and H. Holler, assignors to Gema Volsfafic AG, St. Gal/en, Switzerland

An electrostatic powder spray coating system for car bodies.

Pretreatment Process For Tin- Lead Plating U.S. Patent 5296,268. Mar. 22, 1994 R.A. lantosca, assignor to Shipley Co. Inc., Marlbor- ough, Mass.

A process for plating a tin-lead alloy on cupreous substrates by displacement plat- ing from an immersion plating solution having a pH varying between 0.0 and 1.5 containing dissolved tin and lead salts, said process comprising pretreatment by contact with a solution containing an acid pH adjustor followed by contact with the immersion plating solution.

Cheaper Than Racking Better Than Barrels

VIBRATORY PLATING ideal for connectors, diodes, ICs -and other small delicate parts

0

0

??

Shorter plating time

No deformed parts

Uniform deposition

No racking cost

Reduced overplate

Automatic & manual production

VIBARREL & OSCILLANT units for all production needs

_ I Madison Street z East Rutherford, NJ 07073 - Tel: (20 I ) 773-8686

Fax: (20 I) 773-8797 Y Telex: 291470 ECI

Circle 018 on reader information card

Electroless Copper Plating Bath U.S. Patent 5298,058. Mar. 29, 1994 F. Ma&i and Y Yamemoto, assignors to C. Uyemura 8 Co. LM., Osaka, Japan

An electroless copper plating bath com- prising a water-soluble salt of copper, a complexing agent, and a reducing agent consisting of a phosphorous acid or a phosphite, said bath having an acidic pH.

Plural-Component Spray Gun U.S. Patent $299,740. Apr. 5, 1994 J.D. Bert, assignor to Binks Manufacturing Co., Frank/in Park, 111.

A plural-component mixing and dis- pensing spray gun, comprising a gun body, an airless tip, and means for intermittently feeding streams of reactant liquids.

Composite Electroless Plating Compositions U.S. Patent 5,300,330. Apr. 5, 1994 N. Fekfsfein and D. Lindsay, assignors to Surface Techno/ogy Inc., Trenton, N.J.

An improved electroless plating process including the step of contacting a substrate with a composition comprising a source of

Clean paint hangers and hooks the easy way with a

Controlled PyrolysiP Furnace.

Paint hangers being loaded for furnace cleaning.

??Eliminates chemical strippers ?? Improves transfer efficiency ?? Pollution-free ?? Lowers labor cost

Send us a sample for a FREE test cleaning!

OLLUTION 2677 Freewood Drive Dallas, Texas 75220

RODUCTS CO. (214) 358-l 539

Fax (214) 358-3379

Circle 058 on reader information card

METAL FINISHING . MARCH 1995 83

Page 2: Composite electroless plating compositions

metal salt, an electroless reducing agent, a complexing agent, an electroless plating stabilizer, and a particulate matter stabi- lizer, said particulate matter stabilizer com- prising an admixture of a nonionic com- pound along with a member selected from the group of an anionic compound, a cationic compound, and an amphoteric compound and mixtures thereof.

Electroless Plating of Aramid Surfaces U.S. Patent 5,302,415. Apr. 12, 1994 V Gabara ef al, assignors to E.I. Do Poti de Nemoufs and Co., Wmington, De/.

In a process for electrolessly plating aramid fibers with a durable metal coating comprising the steps of contacting the fibers to be plated with an activation solution, rinsing the fibers, and immersing the fibers in a solution of metal cations to be plated, the improvement comprising contacting with an aqueous solution con- sisting of 80-90% sulfuric acid for 2-60 set at a temperature in the range from lO- 1OOT; and washing the acid-contacted fibers with water until substantially all of the acid is removed before contacting with the sensitizing solution.

Immersion Tln-Lead Plating Bath U.S. Patent 5,302,256. Apr. 12, 1994 T Miura et al., assignors to LeaRonal Japan Inc., Tokyo

An immersion tin-lead alloy plating bath having a basic composition comprising at least one organic sulfonic acid selected from the group consisting of an alkane sulfonic acid, an alkanol sulfonic acid, and an aromatic sulfonic acid, divalent tin and lead salts of the organic sulfonic acid or acids, and thiourea as a chelating agent and further containing at least one of thiocyanic acid, and derivative thereof as an additive.

Cyanide-Free Plating Solutions U.S. Patent 5,302,276. Apr. 12, 1994 F.I. Nobel et al, assignors to LeaRonal Inc., Freeport, N.Y

A solution for use in electroplating, which comprises at least one monovalent metal of copper, silver, gold or combina- tions thereof in an amount of between OS-100 g/L complexed by a thiosulfate ion and wherein the thiosulfate ion and metal ion or ions are present in a molar ratio of 1: 1 to 3: 1 and a stabilizer of an organic

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ALTRASEAL=’ ORGANICS Water based dlp - spin 81 spray coating

sulfinate compound in an amount of at least about 2-15 g/L to stabilize the thiosulfate ion when the solution is operated at an acidic pH between 4 and 6.

Plural-Component External-Mix Spray Gun U.S. Patent 5,303,865. Apr. 19, 1994 J. Sert, assignor to Bnks Manufadwing Co., Franklin Pa&, 111.

A plural-component spraying device comprising a fluid tip having an orifice; means for pressure delivery of a first liquid to the fluid tip; an injector nozzle having an orifice; and means for delivering a second liquid to the injector nozzle.

Zinc-Nickel-Phosphorus Electroless Coatlng U.S. F’atent5,304,403. Apr. 19, 1994 M. Schlesinger and D.D. Snyder, assignors to General Motors Corp., Defroif

A method for electrolessly depositing a sacrificial, corrosion-protective zinc-based alloy coating onto a clean or chemically etched metal substrate, by forming a depo- sition solution comprising a zinc salt and a nickel salt each in an amount sufficient to

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84 METAL FINISHING . MARCH 1995