Cyanide-free gold electroplating bath

of 1 /1
der in the openings of the bask and over the plating base metalli- zation; removing the mask; re- moving the exposed plating base metallization; and reflowing the solder to form the solder bumps on the semiconductor device. PAINT ~ COATING IIIBNO1/IUI U.S. Patent 6,162,776. Dee. 19, 2000 E.T. Marquis and R.E. Baldwin, assignors to Huntsman Petrochemical Corp., Austin, Texas A composition useful as a paint remover comprising dialkyl car- bonate, hydrogen peroxide, and water, wherein 10 to 90% by weight dialkyl carbonate, 0.1 to 20% by weight hydrogen peroxide, and 0.1 to 30% water are present in the composition. ¢m.D cUmmllmS COMPOSITION U.S. Patent 6,162,779. Dec. 19, 2000 P. Miehaud and J-J. Martin, assignors to Elf Atochem, S.A., Paris A nonaqueous composition for cleaning under cold conditions, consisting of, on a weight bases, 70-99% of at least one alkane or at least one cycloalkane end of 1-30% of at least one organic com- pound comprising at least oz~e ke- tone function. CY4NIIMl-lmml |LEClltOPEAllMG BAIlll U.S. Patent 6,165,342. Dec. 26, 2000 W. Kuhn and W. Zilske, assignors to Degussa Hu A cyanide-free electroplating bath for the deposition of gold and gold alloy coatings comprising 0.5 to 30 g/L of gold in the form of a complex of gold and sulfur-con- taining compound; 0 5 to 50 g/L of an alloy metal consisting of silver, copper, indium, cadmium, zinc, tin, bismuth, arsenic, antimony, or mixture thereof; 1 to 200 g/L of a free sulfur-containing com- pound; and 0 to 200 g/L of a con- ductive and buffer salt. IItEMOVAL OF NEAW METALS U.S. Patent 6,165,427. Dec. 26, 2000 J.H. Vera et al., assignors to The Royal Institution for the Advancement of Learning (McGill University), Montreal A method for the removal of solu- ble metaI species consisting of lead, cadmium, zinc, and mix- tures thereof comprising contact- ........... Precious Metal Recovery Heavy Metal Recovery Metal recovery from Acidic Solutions Deionization, Dealkalization, Softening loft Excha~~c!e C:artridge~-, Inexpensive cartridges for quick determination of application feasibility. For complete information on these and other products conlact us at: Sybron Chemicals Inc. Purification Through Innovation Birmingham Rd., Birmingham, NJ 08011 Phone: 609-893-1100 f 800-678-0020 Fax: 609-894-8641 Web: www.sybronchemicals.com Circle 078 on reader card or go to www.thru.to/webconn~--t The only one-component, non-toxic powdered immer- sion nickel strippers on the market. They remove nickel from steel, copper, brass and zinc die-cast. 5 FORMULATIONS • S-9" For removal of nickel from steel = B-929: For copper, brass and zinc die-east base metals • B-? PLUS: The all-pur- pose 'job shop' formula for multiple ~ubstrates B-913: For removal of nickel from aluminum with no etching and no hydrogen embrittlement • B-9 Ni-Fe: For removal of nickel-iron alloy coatings AMORPHA.B TiN-NICKEL STRIPPER A low voltage electrical strip- per which removes tin-nickel, tin-cobalt and other amor- phous coatings from electrolyt- ic nickel base coatings. CUFIX-E COPPER STRIPPER A low voltage electrical copper stripper ,or removal of copper from steel or aluminum withno attack. One-component pow- der. No ammonia, no cyanide, and no nitrates. Waste disposal problems eliminated. Plate out the copper end keep on strip- ping. This could be the last copper stripper bath you will ever have to buy. For more information contact us at: M ETALX, INC. 2600 Rob',/Martin Rd, • Lenoir, NC 2[$645 1-828-758-4997 • I-ax 828-758-5033 ° E-maih coifey@(:onninc.cnm Circle 112 on reader card or go to www.thru,to/webconnect 106 Metal Finishing

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der in the openings of the bask and over the plating base metalli- zation; removing the mask; re- moving the exposed plating base metallization; and reflowing the solder to form the solder bumps on the semiconductor device.

PAINT ~ COATING IIIBNO1/IUI U.S. Patent 6,162,776. Dee. 19, 2000 E.T. Marquis and R.E. Baldwin, assignors to Huntsman Petrochemical Corp., Austin, Texas

A composition useful as a paint remover comprising dialkyl car- bonate, hydrogen peroxide, and water, wherein 10 to 90% by weight dialkyl carbonate, 0.1 to 20% by weight hydrogen peroxide, and 0.1 to 30% water are present in the composition.

¢m.D cUmml lmS COMPOSIT ION U.S. Patent 6,162,779. Dec. 19, 2000 P. Miehaud and J-J. Martin, assignors to Elf Atochem, S.A., Paris

A nonaqueous composition for cleaning under cold conditions, consisting of, on a weight bases, 70-99% of at least one alkane or at least one cycloalkane end of 1-30% of at least one organic com- pound comprising at least oz~e ke- tone function.

CY4NI IM l - lmml | L E C l l t O P E A l l M G BAI l l l U.S. Patent 6,165,342. Dec. 26, 2000 W. Kuhn and W. Zilske, assignors to Degussa Hu

A cyanide-free electroplating bath for the deposition of gold and gold alloy coatings comprising 0.5 to

30 g/L of gold in the form of a complex of gold and sulfur-con- taining compound; 0 5 to 50 g/L of an alloy metal consisting of silver, copper, indium, cadmium, zinc, tin, bismuth, arsenic, antimony, or mixture thereof; 1 to 200 g/L of a free su l fur -conta in ing com- pound; and 0 to 200 g/L of a con- ductive and buffer salt.

I ItEMOVAL OF N E A W METALS U.S. Patent 6,165,427. Dec. 26, 2000 J.H. Vera et al., assignors to The Royal Institution for the Advancement of Learning (McGill University), Montreal

A method for the removal of solu- ble metaI species consisting of lead, cadmium, zinc, and mix- tures thereof comprising contact-

• - ° . . . . . . . . . . .

• Precious Metal Recovery • Heavy Metal Recovery • Metal recovery from Acidic Solutions • Deionization, Dealkalization, Softening

loft Excha~~c!e C:artridge~-,

• Inexpensive cartridges for quick determination of application feasibility.

For complete information on these and other products conlact us at:

S y b r o n C h e m i c a l s I n c . Purification Through Innovation Birmingham Rd., Birmingham, NJ 08011 Phone: 609-893-1100 f 800-678-0020 Fax: 609-894-8641 Web: www.sybronchemicals.com

Circle 078 on reader card or go to www.thru.to/webconn~--t

The only one-component, non-toxic powdered immer- sion nickel strippers on the market. They remove nickel from steel, copper, brass and zinc die-cast.

5 FORMULATIONS

• S-9" For removal of nickel from steel

= B-929: For copper, brass and zinc die-east base metals

• B-? PLUS: The all-pur- pose ' job shop' formula for multiple ~ubstrates

• B-913: For removal of nickel from aluminum with no etching and no hydrogen embrittlement

• B-9 Ni-Fe: For removal of nickel-iron alloy coatings

A M O R P H A . B TiN-NICKEL STRIPPER

A low voltage electrical strip- per which removes tin-nickel, tin-cobalt and other amor- phous coatings from electrolyt- ic nickel base coatings.

CUFIX-E COPPER STRIPPER

A low voltage electrical copper stripper ,or removal of copper from steel or aluminum withno attack. One-component pow- der. No ammonia, no cyanide, and no nitrates. Waste disposal problems eliminated. Plate out the copper end keep on strip- ping. This could be the last copper stripper bath you will ever have to buy.

For more information contact us at:

M E T A L X , I N C . 2600 Rob',/Martin Rd, • Lenoir, NC 2[$645

1-828-758-4997 • I-ax 828-758-5033 ° E-maih coifey@(:onninc.cnm

Circle 112 on reader card or go to www.thru,to/webconnect

106 Metal Finishing