Have the potential supplier complete IPC-1710 to assess the companies capabilities. Validate the responses to the IPC-1710 via a site survey. Jeffrey Bush Director, Quality Assurance and Technical Support VERMONT CIRCUITS INCORPORATED 76 Technology Drive - POB 1890 Brattleboro, Vermont 05302 Voice - 802.257.4571 ext 21 Fax - 802.257.0011 <http://www.vtcircuits.com/> -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of jose Sent: Monday, March 27, 2006 1:10 PM To: [log in to unmask] Subject: [TN] PCB Manufactrurer Qualification Process Does anyone know about any recommended PCB Manufacturer qualification process? Thanks. Jose R. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting Sent: Monday, March 27, 2006 9:24 AM To: [log in to unmask] Subject: Re: [TN] Lead free solders My 2¢. Are you 100% sure the flux was no clean? That sounds like a water soluble (OA) problem where the flux was not removed. It could also be that the no-clean flux was not properly activated to neutralize the flux. As for eating the copper, I have seen Litz wire eroded away by leaving it in the dip pot for too long. When placed in the pot for about 5 seconds it works perfectly. Phil -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of stephen gregory Sent: Monday, March 27, 2006 12:09 PM To: [log in to unmask] Subject: Re: [TN] Lead free solders Steve, Are you sure that it was the flux? What I have heard is that the copper will dissolve because of the high tin content of lead free solders. This was further illustrated to me when I asked the question about removing insulation and tinning Litz wire. One of the recommendations that was made to me was to use a low tin content solder (70Pb/30Sn) to avoid "necking", or dissolving the copper wire. I have also heard about problems with trying to rework lead free solder joints...small pads will sometimes just disappear. -Steve Gregory- Steve Kelly <[log in to unmask]> wrote: Good Morning, Can any one point me to some papers showing problems with no-clean lead free flux. I just returned from a customer who did some extensive thermal cycling on some parts we soldered with no -clean lead free 96.5% tin, 3% silver, and .5% copper. The flux was so active it started to eat through the copper. Not a pretty sight. Thanks in advance. Steve Kelly Steve Kelly PH: (416) 750-8433 FAX: (416) 750-0016 CELL: (416) 577-8433 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------