Selective electroetching of metals
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Blasting Medium U.S. Patenf5,373,047. Dec. 13, 1994 A. S&-m//e and H. Thullen, assignors to Ems-lnventa AG, Switzerland A method of deflashing metal parts comprising applying a particulate reusable blasting medium in a jet stream, said blasting medium comprising a thermoplas- tically processable polymer granulate filled with finely divided metal particles, wherein the metal particles are coated with an adhesion promoter, the metal particles being softer than the metal parts. Thermosetting Powder Coating U.S. Pateni5,373,034. Dec. 13, 1994 Y-H. Chang, ass&nor to Eastman Chemical Co., Kingsport, Term. A semicrystalline polyester plasticizer, consisting essentially of residues of linear diacids and linear diols, wherein the diacids are comprised of at least 90 weight percent of 1,lZdodecanedioic acid, and the diols are. comprised of at least 90 weight percent of residues of 1 ,dhexanediol. Selective Electroplating Machine U.S. Pakrtf5,372,700. Dec. 13, 1994 Y Pilorge and R. Roussd,assignors to framatome Connectors /nfemationa/, Paris la Defense, France Method and apparatus for selective elec- trolytic deposition of a metal, in particular a noble metal such as gold, onto the inside surface of bush-type hollow bodies, in particular connector contact members. Through-Hole Plating Process U.S. Pafent5,373,529. Dec. 20, 1994 J. Hupe and t4! Kronerberg, assignors to Blasberp CbenYachentechnik GmbH, Sokngen, Germany A through-hole plated printed circuit board comprising a substrate having through holes formed therein, said through holes having a metal layer thereon; and a layer of electroconductive synthetic poly- mer formed between the metal layer and the substrate. Method for Determining Coating Quality U.S. Patent 5,373,734. Dec. 20, 1994 H. Shih and M.S. Mekhjian, assignors to FhtC Cop., Chicago A method and apparatus for determining the quality of a coating on a plate, compris- ing measuring the impedance between a reference electrode and the plate; and determining from the measured impedance the quality of the coating. Electroplating Process U.S. Patent5,374,346. Dec. 20, 1994 J.J. Bladon et al., assignors fo Rohm and Haas Co., Philadelphia A process for preparing an article for electroplating, comprising providing an article having metallic surfaces and sur- faces that are electrically nonconductive; coating surfaces of the article with a nonmetallic, semiconductive, liquid perme- able layer, contacting the article with an etchant capable of dissolving the metallic surfaces without removing the semiconduc- tive layer for a time sufficient to dissolve at least the top layer of the metallic surfaces; and contacting with an aqueous spray at a spray pressure of least 100 psi. Selective Eiectroetching of Metals U.S. Pateni5,374,338. Dec. 20, 1994 C. M. 6oyko et al., assignors to /ntemationa/ Business Machines Corp., Am?onk, N. Y A method for selectively electroetching a metal from an electrical device compris- ing immersing in an etching solution; immersing a cathode in the said etching solution; applying an etching potential to a preselected area of the metal; and maintain- ing a passivation potential at the metal to remain unetched, wherein the metal to remain unetched is not electrically con- nected to the preselected area, and wherein the passivation potential does not equal the etching potential. Eiectrocoating Process U.S. Patent5,374,340. Dec. 20, 1994 G. Ottet al., assignors to BASF Lacke + Farben AG, Mnster, Germany A process for coating electrically con- ducting substrates comprising immersing the substrate in an aqueous electrocoating bath containing a resin capable of being cathodically deposited; connecting the sub- strate to a current source to act as a cathode; depositing a film on the substrate by the action of direct current; removing the substrate from the electrocoating bath; and baking the deposited paint film; wherein the electrocoating bath further contains at least 7.5% by weight of a polyoxyalkyle- nepolyamine. Electrodeposition of a Flexible Substrate U.S. Patenf 5,374,344. Dec. 20, 1994 TP. Gall and J. Mcox, ass&ors to Intemaiianal Business Machines Inc., Armonk, IV. Y A method and apparatus for fabricating a metallurgically bondable circuitized flexi- ble substrate comprising electroplating a layered gold-tin electroplate onto a fust portion of the surface of the substrate, and a layered nickel-palladium electroplate onto a second portion of the surface of the substrate. Process for Sealing Aluminum Oxide Films U.S. Patent5,374,455. Dec. 20, 1994 P. Pate/ and R.L. RaMi, assignors to San&z Ltd., Me, Switzedacd A process for sealing an aluminum oxide surface, which comprises immersing the surface in an aqueous sealant composition at a temperature of 160-2 12°F. GRIND OUT MORE PROFIT DOLLARS You need quick service and fast delivery of coated-abrasive FLAPWHEELS-we need more customers like you-we need each will deliver high-quality FIAPWHEELS to you faster than your present supplier. Call us today to start realizing the savings possible from lowering your inventory investment. For all your buffing and polishing needs. MANUFACTURING PLANTS North Delta Dr., Jackson, MS HEADQUARTERS OFFICE Pittsburgh, PA 15202 412-761-9902 f 4 FAX: 412-761-6996 I Circle 127 on reader information card Anodic Coating Defects-Their Causes and Cures b A. W. Bruce 168 pages $135.00 This book provides guidelines and examples for troubleshooting defects in anodic coatings. Chapter one outlines an approach to identifying a defect. Each of the remaining 12 chapters covers one group of defects, such as those arising in the etching process described in Chapter 4. Here one finds a photo and description of each defect, for example fine pitting, with a remedy for curing it. A simple and straightforward approach to problem solving. Send Orders to: METAL FINISHING Three University Plaza For faster service, call (201) 487-3700 Hackensack, NJ 07601 or FAX your order to (201) 487-3705 All book orders must he prepaid. NY, NJ and MA residents add appropriate sales tax. Please include $5.00 shipping and handling for delivery of each book via UPS to addresses in the U.S.; $8.00 for each book for Air Parcel Pmr shipment to Canada; and $20.00 for each book for Air Parcel Port shipment to all other countries. 162 METAL FINISHING ?? JUNE 1995
Transcript of Selective electroetching of metals
Blasting Medium U.S. Patenf5,373,047. Dec. 13, 1994 A. S&-m//e and H. Thullen, assignors to Ems-lnventa AG, Switzerland
A method of deflashing metal parts comprising applying a particulate reusable blasting medium in a jet stream, said blasting medium comprising a thermoplas- tically processable polymer granulate filled with finely divided metal particles, wherein the metal particles are coated with an adhesion promoter, the metal particles being softer than the metal parts.
Thermosetting Powder Coating U.S. Pateni5,373,034. Dec. 13, 1994 Y-H. Chang, ass&nor to Eastman Chemical Co., Kingsport, Term.
A semicrystalline polyester plasticizer, consisting essentially of residues of linear diacids and linear diols, wherein the diacids are comprised of at least 90 weight percent of 1 ,lZdodecanedioic acid, and the diols are. comprised of at least 90 weight percent of residues of 1 ,dhexanediol.
Selective Electroplating Machine U.S. Pakrtf5,372,700. Dec. 13, 1994 Y Pilorge and R. Roussd, assignors to framatome Connectors /nfemationa/, Paris la Defense, France
Method and apparatus for selective elec- trolytic deposition of a metal, in particular a noble metal such as gold, onto the inside surface of bush-type hollow bodies, in particular connector contact members.
Through-Hole Plating Process U.S. Pafent5,373,529. Dec. 20, 1994 J. Hupe and t4! Kronerberg, assignors to Blasberp CbenYachentechnik GmbH, Sokngen, Germany
A through-hole plated printed circuit board comprising a substrate having through holes formed therein, said through holes having a metal layer thereon; and a layer of electroconductive synthetic poly-
mer formed between the metal layer and the substrate.
Method for Determining Coating Quality U.S. Patent 5,373,734. Dec. 20, 1994 H. Shih and M.S. Mekhjian, assignors to FhtC Cop., Chicago
A method and apparatus for determining the quality of a coating on a plate, compris- ing measuring the impedance between a reference electrode and the plate; and determining from the measured impedance the quality of the coating.
Electroplating Process U.S. Patent5,374,346. Dec. 20, 1994 J.J. Bladon et al., assignors fo Rohm and Haas Co., Philadelphia
A process for preparing an article for electroplating, comprising providing an article having metallic surfaces and sur- faces that are electrically nonconductive; coating surfaces of the article with a nonmetallic, semiconductive, liquid perme- able layer, contacting the article with an etchant capable of dissolving the metallic surfaces without removing the semiconduc- tive layer for a time sufficient to dissolve at least the top layer of the metallic surfaces; and contacting with an aqueous spray at a spray pressure of least 100 psi.
Selective Eiectroetching of Metals U.S. Pateni5,374,338. Dec. 20, 1994 C. M. 6oyko et al., assignors to /ntemationa/ Business Machines Corp., Am?onk, N. Y
A method for selectively electroetching a metal from an electrical device compris- ing immersing in an etching solution; immersing a cathode in the said etching solution; applying an etching potential to a preselected area of the metal; and maintain- ing a passivation potential at the metal to remain unetched, wherein the metal to
remain unetched is not electrically con- nected to the preselected area, and wherein the passivation potential does not equal the etching potential.
Eiectrocoating Process U.S. Patent5,374,340. Dec. 20, 1994 G. Ott et al., assignors to BASF Lacke + Farben AG, Mnster, Germany
A process for coating electrically con- ducting substrates comprising immersing the substrate in an aqueous electrocoating bath containing a resin capable of being cathodically deposited; connecting the sub- strate to a current source to act as a cathode; depositing a film on the substrate by the action of direct current; removing the substrate from the electrocoating bath; and baking the deposited paint film; wherein the electrocoating bath further contains at least 7.5% by weight of a polyoxyalkyle- nepolyamine.
Electrodeposition of a Flexible Substrate U.S. Patenf 5,374,344. Dec. 20, 1994 TP. Gall and J. Mcox, ass&ors to Intemaiianal Business Machines Inc., Armonk, IV. Y
A method and apparatus for fabricating a metallurgically bondable circuitized flexi- ble substrate comprising electroplating a layered gold-tin electroplate onto a fust portion of the surface of the substrate, and a layered nickel-palladium electroplate onto a second portion of the surface of the substrate.
Process for Sealing Aluminum Oxide Films U.S. Patent5,374,455. Dec. 20, 1994 P. Pate/ and R.L. RaMi, assignors to San&z Ltd., Me, Switzedacd
A process for sealing an aluminum oxide surface, which comprises immersing the surface in an aqueous sealant composition at a temperature of 160-2 12°F.
GRIND OUT MORE PROFIT DOLLARS
You need quick service and fast delivery of coated-abrasive FLAPWHEELS-we need more customers like you-we need each
will deliver high-quality FIAPWHEELS to you faster than your present supplier. Call us today to start
realizing the savings possible from lowering your inventory investment.
For all your buffing and polishing needs.
MANUFACTURING PLANTS
North Delta Dr., Jackson, MS
HEADQUARTERS OFFICE Pittsburgh, PA 15202
412-761-9902 f
4 FAX: 412-761-6996
I
Circle 127 on reader information card
Anodic Coating Defects-Their Causes and Cures b A. W. Bruce
168 pages $135.00 This book provides guidelines and examples for troubleshooting defects in anodic coatings. Chapter one outlines an approach to identifying a defect. Each of the remaining 12 chapters covers one group of defects, such as those arising in the etching process described in Chapter 4. Here one finds a photo and description of each defect, for example fine pitting, with a remedy for curing it. A simple and straightforward approach to problem solving.
Send Orders to:
METAL FINISHING Three University Plaza For faster service, call (201) 487-3700 Hackensack, NJ 07601 or FAX your order to (201) 487-3705
All book orders must he prepaid. NY, NJ and MA residents add appropriate sales tax. Please include $5.00 shipping and handling for delivery of each book via UPS to addresses in the U.S.; $8.00 for each book for Air Parcel Pmr shipment to Canada; and $20.00 for each book for Air Parcel Port shipment to all other countries.
162 METAL FINISHING ?? JUNE 1995
