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If you need engineers who can

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conception to start-up, look to

Burns & McDonnell.

As a full-service engineering firm -

and a recognized leader in the metal

finishing/plating shop industry - we

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experience will work with you to

ensure success.

Circle 01 1 on reader informat ion card

ature and for a time effective to volatize the maskant.

COPPER C O A T I N G OF PRINTED CIRCUIT B O A R D S U.S. Patent 5,800,859. Sept. 1, 1998 A.D. Price, Surrey, England and P.T. McGrath, Mission Viego, Calif.

A process for treating a metal sur- face to promote adhesion thereto comprising contacting with an adhe- sion promotion composition compris- ing 0.1 to 20% by weight hydrogen

peroxide, a3~ inorganic acid, an or- ganic corrosion inhibitor, and a sur- faetant to form a microroughened conversion-coated surface, and ad- hering a material to the microrough- ened conversion-coated surface.

ELECTROLESS COPPER P L A T I N G PROCESS U.S. Patent 5,801,100. Sept. 1, 1998 C-Y. Lee arm T-II. Huang, assignors to Industrial Technology Research Institute, Hsinchu, Taiwan

A method for fabricating a copper containing integrated s tructure within an integrated circuit compris- ing providing a substrate layer, forming a nickel containing conduc- tor layer over the substrate layer; and forming upon the nickel con- taining conductor layer a copper con- taining conductor layer, where the copper containing conductor layer is employed within a copper contain- ing integrated circuit inductor struc- ture within the integrated circuit.

STABIL IZED C L E A N I N G SOLVENT U.S. Patent 5,801,136. Sept. 1, 1998 R.G. Henry, assignor to Advanced Chemical Design Inc., Euclid, Ohio

A solvent mix tu re hav ing an ozone depletion factor of less than 0.08, for use in a vapor degreasing system, consisting essentially of 80 to 96.8~ by volume, chlorobro- momethane; about 3.2 to 20.0% of a mixture of stabilizers consisting essentially of nitromethane, 1,2- butylene oxide, and 1,3-dioxolane, the mixture of stabilizers being effective to inhibit the release of bromine into the atmosphere from the chlorobromomethane.

C H R O M i U M - F R E E C O N V E R S I O N C O A T I N G U.S. Patent 5,801,217. Sept. 1, 1998 E.A. Rodzewich et al., assignors to BetzDearbort~ Inc., Trevose, Pa.

A chromium-free conversion coat- ing composition consisting essen- tially of a diglycidyl ether of Bis- phenol A, a silicon compound containing a hydrolyzable group, a fiuoroacid selected from the group consisting of fluorotitanic acid and fluorozirconic acid, and water.

ZERO-VOC A O U E O U S D I S P E R S I O N U.S. Patent 5,801,219. Sept. I, 1998 A.L. Neymark and D.J. Miklos, assignors to Bee Chemical Co., Lansing, Ill.

A neutralized aqueous dispersion of an acid-modified polyolefin and an adduct of a monoepoxide with a polymeric acid.

116 Metal Finishing