Two considerations to mention are less cost for immersion silver compared to ENIG and from a former process engineer the ability to rework immersion silver. Rework of ENIG never panned out for me personally. The silver can be stripped and re-plated. My $0.02 worth. Russ Burdick >From: Charles McMahon <[log in to unmask]> >Reply-To: "TechNet E-Mail Forum." <[log in to unmask]> >To: [log in to unmask] >Subject: [TN] SURFACE FINISHES >Date: Wed, 5 Dec 2001 11:51:29 -0500 > >TO Tech-Net: > >As an advocate for ENIG for fine pitch designs, I am asking for input on >whether moving towards a silver product >is more efficient a performer at the assembly level. Finishes such as >Alpha Level have been available but have not >replaced the current slate that appears common; ie. white tin or ENIG. > >Question: Are silver finishes more cost effective at the board >fabricator while at the same time being process friendly >at the assembler than ENIG or white tin? HASL is not one that I believe >will be an option much longer due to the >de-leading of the inductry so I have not included that choice. > >I know the list as addressed facets of this issues in the past however >would appreciate any inputs. > >Charlie McMahon. > >--------------------------------------------------------------------------------- >Technet Mail List provided as a free service by IPC using LISTSERV 1.8d >To unsubscribe, send a message to [log in to unmask] with following text in >the BODY (NOT the subject field): SIGNOFF Technet >To temporarily halt delivery of Technet send the following message: SET >Technet NOMAIL >Search previous postings at: www.ipc.org > On-Line Resources & Databases > >E-mail Archives >Please visit IPC web site (http://www.ipc.org/html/forum.htm) for >additional >information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 >ext.5315 >--------------------------------------------------------------------------------- _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------