to Advanced Micro Devices Inc.,Sunnyvale, Calif.

A method for electroplating a sub­strate comprising immersing acontact for positioning the sub­strate into an electrolyte solution;applying a first current amount tothe contact for plating only thecontact with a metal layer; posi­tioning the substrate with theplated contact in the electrolytesolution; and applying a secondcurrent amount to the substratefor forming a metal layer on thesubstrate.

PIIOCas ......ITALUZlN8IUCTIIOPOUSHIN8 BATHSU.S. Patent 5,882,500. Mar. 16, 1999R. Abedian et al., assignors toPoligrat GmbH, Munich, Germany

A process for removing Fe(lI!)from a liquid composition com­prising phosphoric acid, sulfuricacid, and Fe(lII) ions comprisingproviding an electrolysis cell hav­ing an anodic region and a ca­thodic region separated from one

MEXICO

another by a partition formed of amaterial with a pore size between0.5 and 10 j.Lm and capable offorming in situ a metal ion-imped­ing diaphragm when a direct cur­rent is applied across the cell;feeding the liquid composition tothe cathodic region; applying di­rect current across the cellthereby reducing the Fe(lIl) ionsto Fe(l!) ions and forming in thecathodic region a precipitate ofFeS04; and removing the precipi­tate from the cathodic region.

APPARATUS POR IIIIIOVlN8MITAL COMPOUNDS ....WAS'nWATIIIU.S. Patent 5,882,513. Mar. 16, 1999S.M. Stevenson, McMurray, Pa,

An apparatus for removing metalcompounds from wastewater com­prising means for simultaneouslyadjusting the pH, aerating, andagitating the wastewater all inte­grated into a single reaction tank;means for adding a polymeric floc­culating agent to the water; ro-

tary drum thickener means forseparating supernate water; beltfilter press means for removingadditional water; means fortransporting the additional waterto a polishing pond; and means forremoving water from the polish­ing pond.

PAIlII' IIIICOVIIII_ MITHODU.S. Patent 5,882,522. Mar. 16, 1999K. Matsumoto et al., assignors toAsahi Kasei Kogyo KK and ShintoPaint Co. Ltd., both of Japan

A method. for recovering paintscomprising placing a receiver ofatleast one of an ultrafiltrationmembrane and a microfiltrationmembrane in a spray coatingbooth for receiving oversprayedpaint and passing at least one ofwater and organic solventthrough the membrane from oneside thereof to the other sidethereof, and receiving and recov­ering the oversprayed paint at theother side of the membrane.

• planning to move or expandmetal finishing operations Innorthern Mexico?

• looking for a WWT systemssupplier who can provide tumkey crossborder support?

• Call PiSCO today... ask forBob Eklund... alllnquines arekept stnctly confidential.

DIICO D1llCOM1XPO BeIl_ Z8nIgaa SUr 1300l.outI'Itlte, KY 40014 Edlllclo KM»~1NllIuncIOmM.OlIIll ~. C.P. MOllO

Toll'.........1...2••

Il1dllstrlcll WastewaterTrcatmcnt Systcms

Circle 018 on reader information card

82

Modern ElectroplatingIry F. Lowenheim

801 pages $180.00

This is the third edition of this valuable textbook. Numerousauthorities have contributed summaries on principles of plating andmetal finishin~. controL maintenance, deposit properties, and trou­bleshootin~. A worthwhile reference.

Send Orders to:

METAL RNISHING660 White Plains Rd.

Tarrytown, NY 10591·5153For faster service, call (914) 333-2578or FAX your order to (914) 333-2570

All hook orde" lIIust llt' prep.id. 1'1,'"'' illChll1r S5.00 shippilll\ .lId h.",lIillg for <lrlivery of chhook vi.1 I IPS ill th,· I IS., SI0.00 lor e.ll'h hook ,hipped expr.., to C.n.d.; .nd S20.00 for chbook ,hipprcl expre" to .•11 otllt'r mumri...

Metal Finishing