Source: http://www.google.com/patents/US6691912?dq=7565338
Timestamp: 2014-07-11 03:06:06
Document Index: 294764950

Matched Legal Cases: ['art 3', 'art 6', 'art 4', 'art 5', 'art 8', 'art 1', 'art 2']

Patent US6691912 - Methods of avoiding blowhole formation by conditioning through holes and glass - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA composition and method for cleaning and conditioning a non-conductive surface defined by a through hole in a printed circuit board (PCB) is disclosed. The through hole surface is contacted with the composition of the invention to provide a cleaned and conditioned surface. The clean and conditioned...http://www.google.com/patents/US6691912?utm_source=gb-gplus-sharePatent US6691912 - Methods of avoiding blowhole formation by conditioning through holes and glassAdvanced Patent SearchPublication numberUS6691912 B2Publication typeGrantApplication numberUS 10/087,051Publication dateFeb 17, 2004Filing dateMar 1, 2002Priority dateJan 6, 2000Fee statusPaidAlso published asCA2396566A1, CA2396566C, CN1214134C, CN1437661A, DE60044067D1, EP1257694A2, EP1257694A4, EP1257694B1, US6375731, US20020139686, WO2001050821A2, WO2001050821A3Publication number087051, 10087051, US 6691912 B2, US 6691912B2, US-B2-6691912, US6691912 B2, US6691912B2InventorsMichael V. Carano, Frank PolakovicOriginal AssigneeElectrochemicals, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (9), Non-Patent Citations (14), Referenced by (2), Classifications (10), Legal Events (13) External Links: USPTO, USPTO Assignment, EspacenetMethods of avoiding blowhole formation by conditioning through holes and glassUS 6691912 B2Abstract A composition and method for cleaning and conditioning a non-conductive surface defined by a through hole in a printed circuit board (PCB) is disclosed. The through hole surface is contacted with the composition of the invention to provide a cleaned and conditioned surface. The clean and conditioned surface is coated with conductive carbon particles (usually graphite) to provide a carbon-coated surface. The carbon-coated surface is electro plated and then soldered using hot solder. Those surfaces that have been soldered and also treated with the composition of the invention exhibit fewer blow hole problems. The composition of the invention comprises carbonates, binders, and resins, and combinations thereof, that improve the adhesion and coverage of a coating containing graphite to a surface defined by a through hole bore or other substrate. (�Through holes� as used herein refers both to through holes and to vias.)
CROSS-REFERENCE TO RELATED APPLICATIONS This is a divisional of application Ser. No. 09/478,587 filed Jan. 6, 2000, now U.S. Pat. No. 6,375,731. The entire specification and all the claims of U.S. Ser. No. 09/478,587 are hereby incorporated by reference.
BACKGROUND OF THE INVENTION The present invention is directed to printed wiring boards (PWB's) having through holes, or other substrates, made electrically conductive by applying a conductive coating containing carbon, and more particularly graphite. The invention is more particularly directed to methods of avoiding blowhole formation in printed wiring boards by treating their through holes with compositions comprising a pH buffer, binders, binding agents, dispersing agents, and combinations thereof, that improve the adhesion and coverage of a conductive coating containing graphite to a surface defined by at least one through hole bore or other substrate. (�Through holes� as used herein refers both to through holes and to vias.)
(v) Rewind VCR tape and play the recording on a monitor by advancing in 3 second (�{fraction (1/30)} sec.) intervals. Count the number of holes that were outgassing and the total number of holes. The �Hot Oil Test %� result is calculated as follows:
Hot Oil Test %=[(number of holes that were outgassing)�(total number of holes)]*100. The following examples represent specific but nonlimiting embodiments of the present invention:
*1The �%� values in the �Formulation� column indicate the proportion of the as-sold cleaner/conditioner used in the bath; applies to all Examples. *2Deionized water; applies to all Examples. *3In practice, the working cleaner/conditioner was maintained between the range of 140� F. to 160� F. (60� C.-71� C.); applies to all Examples. EXAMPLE 2 The effect of different cleaning and conditioning agents (�CL/COND�) with and without binders on the degree of coverage achieved with AQUADAG E, sold by Acheson Colloids Company, P.O.box 611757, Port Huron, Mich., Asbury Graphite Mills Inc., Asbury, N.J. was examined. The formulations and resulting observations are set out in Table 3.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3556883Jul 21, 1967Jan 19, 1971Mitsubishi Edogawa Kagaku KkMethod for chemically polishing copper or copper alloyUS5139642Aug 19, 1991Aug 18, 1992Olin CorporationProcess for preparing a nonconductive substrate for electroplatingUS5389270May 17, 1993Feb 14, 1995Electrochemicals, Inc.Composition and process for preparing a non-conductive substrate for electroplatingUS5476580May 3, 1994Dec 19, 1995Electrochemicals Inc.Processes for preparing a non-conductive substrate for electroplatingUS5585427Nov 7, 1994Dec 17, 1996Ppg Industries, Inc.Pigment dispersing additive for coating compositionsUS5690805Jun 7, 1995Nov 25, 1997Electrochemicals Inc.Direct metallization processUS5725807Jun 7, 1995Mar 10, 1998Electrochemicals Inc.Carbon containing composition for electroplatingUS6375731Jan 6, 2000Apr 23, 2002Electrochemicals Inc.Cationic conditioning agent, binder or an anionic dispersant that improve the adhesion of carbon particles and coverage, printed circuit boardWO2001050821A2Nov 16, 2000Jul 12, 2001Electrochemicals IncConditioning of through holes and glassNon-Patent CitationsReference1Acrysol(R) Thickners and Rheology Modifiers-A selection guide WorldWide Rheology Modifiers 5 pages (date unknown).2Acrysol� Thickners and Rheology Modifiers�A selection guide WorldWide Rheology Modifiers 5 pages (date unknown).3Aqualon Sodium Carboxymethylcellulose Physical and Chemical Properties, Hercules 22 pages (date unknown).4Lea, "the Harmfulness of Blowholes in PHT Soldered Assemblies," Circuit World, 16 (4):23-28 (1990).5Lea, et al., "Blowholing in PHR Solder Fillets Moisture and PCB," (Part 3) Circuit World 12(4):26-33 (1986).6Lea, et al., "Blowholing in PHT Solder Fillets Optimising the Soldering," (Parat 7) Circuit World 13(2):42-45 (1987).7Lea, et al., "Blowholing in PHT Solder Fillets The Laminate, The Drilling and Hole Wall Preparation," (Part 6) Circuit World 13(1):43-50 (1986).8Lea, et al., "Blowholing in PHT Solder Fillets The Plated Copper Barrel," (Part 4) Circuit World 13(1):28-34, (1986).9Lea, et al., "Blowholing in PHT Solder Fillets The Role of the Electroless Copper," Part 5) Ciruit World 13(1): 35-42 (1986).10Lea, et al., "Blowholing in PHT Solder Fillets The Scientific Framework Leading to Recommindations for Its Elimination," (Part 8) Circuit World 13(3):11-20 (1987).11Lea, et al., Blowholing in PTH Solder Fillets Assessment of the Problem (Part 1) Circuit World 12(4): 14-19 (1986).12Lea, et al., Blowholing in PTH Solder Fillets The Nature, Origin and Evolution of the Gas (Part 2) Cicuit World 12(4):1-25 (1986).13Resins, Water-Soluble, vol. 20 pp. 207-225 (date unkown).14Xanthan Gum: natural biogum for scientific water control, Kelco Fourth Edition 6 pages (date unknown).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7858146Jun 29, 2007Dec 28, 2010Rohm And Haas Electronic Materials Llcforming copper layer on printed circuit boards; desmearing the apertures with sodium hydroxide solution, then non-ionic surfactants to reduce surface tension to enable proper wetting and increase catalyst adsorption on the walls of the through-holesUS20110214851 *May 16, 2011Sep 8, 2011Wah Hong Industrial Corp.Use of a graphite heat-dissipation device including a plating metal layer* Cited by examinerClassifications U.S. Classification228/256, 228/209, 228/214, 228/206International ClassificationH05K3/42, H05K3/34, C25D5/54, C25D7/00Cooperative ClassificationH05K3/424European ClassificationH05K3/42D2Legal EventsDateCodeEventDescriptionSep 12, 2013ASAssignmentEffective date: 20130904Owner name: PNC BANK, PENNSYLVANIAFree format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC.;OMG ELECTRONIC CHEMICALS, LLC;OMG AMERICAS, INC.;AND OTHERS;REEL/FRAME:031208/0876Sep 5, 2013ASAssignmentOwner name: EAGLEPICHER MEDICAL POWER, LLC, TEXASOwner name: OMG AMERICAS, INC., OHIOOwner name: OMG ELECTRONIC CHEMICALS, LLC, MINNESOTAFree format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A.;REEL/FRAME:031169/0976Effective date: 20130903Owner name: OM GROUP, INC., OHIOOwner name: EAGLEPICHER TECHNOLOGIES, LLC, MISSOURIAug 12, 2011ASAssignmentFree format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC., A DELAWARE CORPORATION;COMPUGRAPHICS U.S.A. INC., A DELAWARE CORPORATION;CYANTEK CORPORATION, A DELAWARE CORPORATION;AND OTHERS;REEL/FRAME:026740/0353Effective date: 20110802Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT, TEXASAug 10, 2011FPAYFee paymentYear of fee payment: 8Aug 10, 2011ASAssignmentOwner name: EAGLEPICHER MEDICAL POWER, LLC, A DELAWARE LIMITEDFree format text: PATENT RELEASE AGREEMENT;ASSIGNOR:PNC BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT;REEL/FRAME:026727/0485Owner name: OMG AMERICAS, INC., A OHIO CORPORATION, OHIOEffective date: 20110802Owner name: COMPUGRAPHICS U.S.A. INC., A DELAWARE CORPORATION,Owner name: EAGLEPICHER TECHNOLOGIES, LLC, A DELAWARE LIMITEDOwner name: EPEP HOLDING COMPANY, LLC, A DELAWARE LIMITED LIABOwner name: OMG ENERGY HOLDINGS, INC., A DELAWARE CORPORATION,Owner name: OMG ELECTRONIC CHEMICALS, INC., A DELAWARE LIMITEDOwner name: OM GROUP, INC., A DELAWARE CORPORATION, OHIOAug 11, 2010ASAssignmentFree format text: CHANGE OF NAME;ASSIGNOR:OMG ELECTRONIC CHEMICALS, INC.;REEL/FRAME:024812/0920Effective date: 20100730Owner name: OMG ELECTRONIC CHEMICALS, LLC, NEW JERSEYMar 11, 2010ASAssignmentOwner name: PNC BANK, NATIONAL ASSOCIATION,PENNSYLVANIAFree format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC.;OMG AMERICAS, INC.;OMG ELECTRONIC CHEMICALS, INC. AND OTHERS;US-ASSIGNMENT DATABASE UPDATED:20100312;REEL/FRAME:24066/130Effective date: 20100308Free format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC.;OMG AMERICAS, INC.;OMG ELECTRONIC CHEMICALS, INC. AND OTHERS;US-ASSIGNMENT DATABASE UPDATED:20100311;REEL/FRAME:24066/130Free format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC.;OMG AMERICAS, INC.;OMG ELECTRONIC CHEMICALS, INC. AND OTHERS;REEL/FRAME:24066/130Free format text: SECURITY AGREEMENT;ASSIGNORS:OM GROUP, INC.;OMG AMERICAS, INC.;OMG ELECTRONIC CHEMICALS, INC.;AND OTHERS;REEL/FRAME:024066/0130Owner name: PNC BANK, NATIONAL ASSOCIATION, PENNSYLVANIAJan 14, 2009ASAssignmentOwner name: OMG ELECTRONIC CHEMICALS, INC., NEW JERSEYFree format text: MERGER;ASSIGNORS:ELECTROCHEMICALS INC.;OMG FIDELITY, INC.;REEL/FRAME:022102/0711Effective date: 20081231Dec 31, 2007ASAssignmentOwner name: ELECTROCHEMICALS, INC., MINNESOTAFree format text: TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS PREVIOUSLY RECORDED AT REEL 015667 FRAME 0177;ASSIGNOR:CREDIT SUISSE FIRST BOSTON, ACTING THROUGH ITS CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT;REEL/FRAME:020299/0637Effective date: 20071231Jun 15, 2007FPAYFee paymentYear of fee payment: 4Aug 10, 2004ASAssignmentOwner name: CREDIT SUISSE FIRST BOSTON, ACTING THROUGH ITS CAYFree format text: SECURITY AGREEMENT;ASSIGNOR:ELECTROCHEMICALS, INC.;REEL/FRAME:015667/0177Effective date: 20040730Free format text: SECURITY AGREEMENT;ASSIGNOR:ELECTROCHEMICALS, INC. /AR;REEL/FRAME:015667/0177Aug 4, 2004ASAssignmentOwner name: ADVANTIS TECHNOLOGIES, INC., GEORGIAOwner name: ALPHAGARY CORPORATION, MASSACHUSETTSOwner name: CHEMICAL SPECIALTIES, INC., NORTH CAROLINAOwner name: COMPUGRAPHICS U.S.A. INC., CALIFORNIAOwner name: CYANTEK CORPORATION, CALIFORNIAOwner name: ELECTROCHEMICALS INC., MINNESOTAOwner name: EXSIL, INC., ARIZONAOwner name: LUREX, INC., MARYLANDFree format text: TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS (PREVIOUSLY RECORDED AT REEL 14289 FRAME 0742);ASSIGNOR:JPMORGAN CHASE BANK, AS ADMINISTRATIVE AGENT;REEL/FRAME:014943/0249Owner name: ROCKWOOD AMERICA INC., NEW JERSEYOwner name: ROCKWOOD PIGMENTS NA, INC., MARYLANDOwner name: ROCKWOOD SPECIALTIES GROUP, INC., NEW JERSEYOwner name: ROCKWOOD SPECIALTIES INC., NEW JERSEYOwner name: ROCKWOOD SPECIALTIES INTERNATIONAL, INC., NEW JERSOwner name: RS FUNDING CORPORATION, MARYLANDOwner name: SOUTHERN CLAY PRODUCTS, INC., TEXASOwner name: SOUTHERN COLOR N.A., INC., GEORGIAFree format text: TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS (PREVIOUSLY RECORDED AT REEL 14289 FRAME 0742);ASSIGNOR:JPMORGAN CHASE BANK, AS ADMINISTRATIVE AGENT;REEL/FRAME:014943/0249Effective date: 20040729Owner name: ROCKWOOD SPECIALTIES INTERNATIONAL, INC. 100 OVERLFree format text: TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS (PREVIOUSLY RECORDED AT REEL 14289 FRAME 0742);ASSIGNOR:JPMORGAN CHASE BANK, AS ADMINISTRATIVE AGENT /AR;REEL/FRAME:014943/0249Jul 31, 2003ASAssignmentOwner name: JPMORGAN CHASE BANK, NEW YORKFree format text: SECURITY AGREEMENT;ASSIGNORS:ROCKWOOD SPECIALTIES INTERNATIONAL, INC.;ROCKWOOD SPECIALTIES GROUP INC.;ALPHAGARY CORPORATION;AND OTHERS;REEL/FRAME:014289/0742Effective date: 20030723Owner name: JPMORGAN CHASE BANK 270 PARK AVENUENEW YORK, NEW YFree format text: SECURITY AGREEMENT;ASSIGNORS:ROCKWOOD SPECIALTIES INTERNATIONAL, INC. /AR;REEL/FRAME:014289/0742RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google