Silver plating in printed circuit board manufacture

Silver plating in printed circuit board manufacture

backing having a major surface; a plurality of abrasive particles; a binder, which adheres the plurality of abrasive particles to the major surface of...

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backing having a major surface; a plurality of abrasive particles; a binder, which adheres the plurality of abrasive particles to the major surface of the backing; and an antiloading component. ROLLER MOLTEN

SUPPORT METAL

DEVICE PLATING

IN BATH

U.S. Patent 5,954,880. Sept. 21, 1999 A. Aoki et al., assignors to NSK Ltd., Tokyo and Sumitomo Metal Industries, Ltd., Osaka

A roller support device in a molten metal plating bath comprising a roller disposed in the molten metal plating bath; a shaft projecting from a central portion of an end side of the roller and extending axially and concentrically with the roller; at least one rolling bearing assembly.

COMPOSITION REMOVAL

FOR

COATING

U.S. Patent 5,954,890. Sept. 21, 1999 P.E. Smith et al., assignors to Eldorado Chemical Co. Inc., San Antonio

A method of rendering a polymeric coating on a surface softened to release at about ambient temperature comprising applying a composition consisting of hydrogen peroxide or organic peroxide, benzyl alcohol, N-methyl pyrrolidone, water, a corrosion inhibitor, and a thickener; the composition having a pH of 6.5 to 11.0. ZINC

PHOSPHATE

COATlNG

U.S. Patent 5,954,892. Sept. 21, 1999 E.M. Musing0 and C.R. Ike, assignors to Bulk Chemicals Inc., Reading, Pa.

A method for forming a zinc phos-

phate coating on a metal surface comprising contacting with a bath comprising an aqueous solution of zinc, phosphate, nitrate, nickel, a compound containing a group IV-B element, and a fluosurfactant. SILVER CIRCUIT

PLATING BOARD

IN PRINTED MANUFACTURE

U.S. Patent 5,955,141. Sept. 21, 1999 A.M. Soutar and P.T. McGrath, assignors to Alpha Metals Inc., Jersey City, N. J.

A process for forming a silver coating on a surface of a first metal having a first electropositivity less than an electropositivity of silver comprising contacting the surface of the first metal with an aqueous composition comprising silver ions and a complexing

DOES YOUR POWDER Boom DO

BACKFLIPS?

SCR (Thyristor) Sin&

I

STANDARD and 3-chase

Power

Supplies

FEATURES inour.

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BACKFLIPS.

Benefits: . Coats small parts in a variety of situations . Economical operation . Self-contained www.deimco.com l Compact design

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Also available from Aldonex Manual Variable Transformer Control Motorized Variable Transformer Control Tapswitch Control Stand alone Periodic Reverse Modular Assemblies Microprocessor Control

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INC.

2917.19 St. Charles Rd. Fax (708) 547-5738 Phone: (70X) 547.5663 P.O. Box 148 Bellwood, IL 60104 r-mail: [email protected] www.aldonex.com

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agent that is a multidentate ligand, the aqueous composition having a pH of 2 to 12, to form a coating of silver on the surface of the first metal, wherein the aqueous composition is free of ammonium ions, thiosulphate ions, and combinations thereof. TESTING MATERIALS ELECTROLESS PLATING U.S. Patent 5,955,150.

FOR

USE

IN

Sept. 21, 1999 S. Lal, assignor to Lucent Technologies Inc., Murray Hill, N. J.

A method for determining the suitability of a first concentration of material for use in an electroless plating bath comprising dissolving solder mask material and leaching impurities from the solder mask material to form a test bath; placing the test bath in a

voltammetric cell having at least three electrodes; supplying an increasing DC voltage so as to cause anodic current at the surface of the third electrode; measuring the anodic current resulting from the DC voltage; recording the anodic current resulting from the DC voltage and producing a first profile of the current as a function of the supplied voltage; and comparing the first profile with a second profile obtained from a second test bath having components of a known purity. CLEANING

COMPOSINON

U.S. Patent 5,955,410. Sept. 21, 1999 J.A. Dingess and F.A. Osmanski, assignors to Safety-Kleen, Elgin, Ill.

A composition for removing encrusted residues from metallic

surfaces and including, in combination, solvents for dissolving various organic deposits, the composition consisting essentially of between 5 and 20% by volume of a propylene glycol based solvent consisting of propylene glycol methyl ether, a propylene glycol methyl ether acetate, or combinations thereof; between 10 and 30% of N-methylpyrrolidone; between 1 and 10% by volume of monoethanolamine; between 1 and 20% of water; between 5 and 15% of a fatty acid blend including at least 60% by volume of acid; and between 10 and 70% of a high boiling aromatic hydrocarbon solvent having a flash point of between 40 and 105°C. POWDER

COATING

COMPOSITION

mGALVANOTECH

GALVANOTECH IS A WORLD-WIDE LEADER IN THE DESIGN AND MANUFACTURE OF ELECTROPLATING EQUIPMENT. OUR SERVICES INCLUDE: The design and manufacture OJ? l

Single and multi-strand reel-to-reel selective plating modules for wheel plating, control depth, stripe y“lL”‘~,

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plating plating,

machines with spot plating, brush

We manufacture and design masking products from rubber, plastic, metal and the most common adhesive tapes used in painting, powder coating and plating.

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well as specially designed modules to meet all special plating needs. l

Product handling equipment including: accumulators; reelers and dereelers; power contacts.

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MASKING

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202 E. Highland Pkwy., RoselIe, NJ 07203 908-241-3900 l Fax 908-241-4262 Email: [email protected] Circle 94

026 on reader

information

card

Ask for our new catalog and free samples. Circle

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information

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Finishing