A method for treating a work­piece, including exposed alumi­num metallized surfaces, with analkaline, water-based solutioncontaining an aluminum-contain­ing constituent and a silicon­containing constituent that reactto form an aluminosilicate on theexposed aluminum metallizedsurfaces, the solution assisting inremoval of the residues from theworkpiece.

MOAL REMOVAL CLEANINGPROCESS AND APPARATUSU.S. Patent 5,980,647. Nov. 9, 1999E.D. Buker et al., assignors toInternational Business MachinesCorp., Armond, N.J.

A method of cleaning a workpiececomprising spinning the work­piece about an axis; directing astream of cleaning fluid throughan outlet port at the workpiecewhile moving the outlet port overthe workpiece, the outlet porthaving a traverse rate across theworkpiece; and varying the tra-

verse rate so that the effect of thecleaning fluid on the workpiece isindependent of the radial positionof the outlet port over the work­piece.

CLEANING OF WORKPIECESHAVING ORGANIC RESIDUESU.S. Patent 5,980,648. Nov. 9, 1999R. Adler, assignor to UnionIndustrie Comprimierter GaseGmbH NFG KG, Vienna, Austria

In a process for cleaning work­pieces exhibiting organic resi­dues, comprising introducingcompressed gas under pressureinto a pressure tank loaded withthe workpieces, the improvementwherein a liquefied or supercriti­cal gas is mechanically circulatedwithin the pressure tank duringcleaning of the workpieceswhereby the mechanically circu­lated liquefied or supercritical gasexhibits a circulation velocity andthe circulation velocity of the liq­uefied or supercritical gas is var­ied during said cleaning and

wherein the temperature of theliquefied or supercritical gas inthe pressure tank is maintainedconstant during the cleaning.

PAnERNED ABRASIVE MATERIALU.S. Patent 5,980,678. Nov. 9, 1999N.N. Tselesin, assignor to UltimateAbrasive Systems L.L.C., Atlanta,Ga.

A method for making an abrasivematerial.

POLISHING APPARATUSU.S. Patent 5,980,685. Nov. 9, 1999N. Kimura, assignor to Ebara Corp.,Tokyo

An apparatus for polishing a sur­face of a workpiece, the apparatuscomprising a turntable having apolishing surface; and a top ringhaving a pressing surface forholding a workpiece to be polishedand pressing the workpieceagainst the polishing surface ofthe turntable; wherein at leastone of the surfaces is a curvedsurface.

· P.llonl .5.89U5 \·P>tonl.5.865.\98

HES'MHigh Efficiency System

CATHODE MAGNO ASSEMBLYU.S. Patent 5,980,707. Nov. 9, 1999B. W. Manley, assignor to SierraApplied Sciences Inc., Boulder, Colo.

A magnet assembly for producinga plasma-confining magnetic fieldover the surface of a target com­prising a stationary magnet platehaving a first magnet mountedthereon so that a first pole axis ofthe first magnet is substantiallyperpendicular to said stationarymagnet plate; a moveable magnetplate having a second magnetmounted thereon and a thirdmagnet mounted thereon at a po­sition adjacent the second magnetso that a pole axis of the secondmagnet is substantially perpen­dicular to the moveable magnetplate and so that a pole axis of thethird magnet is substantially par­allel to the moveable magnetplate.

· Eliminates losses from drafts created by overheadventilation. cooling 'ans. open doors etc.

· £IImlnates the need 'or an operator to standover the degreaser.

· Freestanding when machineIs removed for service.

· Can be field mounted toexisting equipment.

· Manual load andunloadstation.

· NESHAP Compliant Desl~n .

· Accepts all currentlyapprov d sohents.

· Primary and ColdTrap·Refrigeration provided byone compressor' .

· Reduces Sohent Consumption• Integral Safely Controls· In te~ral Containment Pan· Finished In att racthe stainless enclosure .1nd

provided with wheels for Installation ease.

Circle 057 on reader information card Circle 006 on reader information card

86 Metal Finishing