Many thanks. Joyce Koo Researcher Materials Interconnect Lab Office: (519) 888-7465 x79945 BlackBerry: (226) 220-4760 [cid:[log in to unmask]] ________________________________ From: Dennis Fritz [mailto:[log in to unmask]] Sent: Wednesday, May 08, 2013 11:06 AM To: [log in to unmask]; Joyce Koo Subject: Re: [TN] immersion gold Joyce, Immersion plating reactions are driven by replacing a metal already on the surfuce with a metal in solution. Metal dissolved Metal plated Process elecroless nickel gold ENIG electroless palladium gold ENEPIG copper electroplate silver Immersion silver copper electropate tin Immersion tin Immersion reactions inherently stop when the plated metal covers the surface of the metal being dissolved. That means that immersion reactions cannot reach the thicknesses you ask That said, electroless reactions occur chemically where the metals plate on themselves and build thickness with time. Elecroless copper, nickel, silver and gold are all known and can build thicknesses that you ask. However, electroless reactions tend to have pretty pure metals (except electroless nickel that co-deposits phosphorus at some 4-12%). Someone else that supplies electroless gold will have to comment about the "hardness" of that deposit. Electroplating can deposit essentially all the common metals and can co-deposit hardners (other metals) with gold with various properties and thicknesses. Denny Fritz -----Original Message----- From: Joyce Koo <[log in to unmask]> To: TechNet <[log in to unmask]> Sent: Wed, May 8, 2013 10:22 am Subject: [TN] immersion gold Joyce Koo Researcher Materials Interconnect Lab Office: (519) 888-7465 79945 BlackBerry: (226) 220-4760 Gurus, Is there any great immersion gold process out there that can do 0.5 micron gold with durability and good hardness? (> 20 micro-inches). I need to up date my knowledge... -being far from plating tank for too long. Many thanks. Best regards, Joyce --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask]<mailto:[log in to unmask]> ______________________________________________________________________ --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________