Doug, Grraham and all other gurus, Many thanks for all your help. I think I am going to test both...new and old...jk (zap, zap) -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Douglas O. Pauls Sent: Thursday, March 09, 2006 9:15 AM To: [log in to unmask] Subject: Re: [TN] SIR spacing Joyce, For the new methods, it is not so much a case of obsolete or insufficient as they are not yet accepted, nor are any of the standards which call out such test methods revised to call out the new methods. So, if you run the new test, you won't have criteria or a specification against which to test. Doug Pauls Joyce Koo <[log in to unmask] COM> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 03/09/2006 08:01 Re: [TN] SIR spacing AM Please respond to [log in to unmask] om Excellent! this is exactly what I am looking for. Jack and Doug, is any possiblity to get access the proposed new test method as "review version"? Hate to run test ($$$) and find out it is "obsolete or insufficient" by gurus (never argue with someone that is superior than me either physically or mentally..;-) jk ps: Doug, you are right, Sandia is a brickwall..either by phone or e-mail.. I guess they finger it out I do not have million $s just look at the phone number..;-( -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Graham Naisbitt Sent: Thursday, March 09, 2006 6:21 AM To: [log in to unmask] Subject: Re: [TN] SIR spacing Hi Joyce There is a new IPC-TM-650 2.6.3.7 spec due to be released soon that introduces a far more relevant test protocol to help characterise a process rather than a single material (e.g. Flux). This includes a recommended bias of 5v based upon a gradient of 25v/mm. The reason for this is based upon science research led by the NPL that showed lower voltage actually increased the effects of electro-chemical migration. The measurement voltage is also recommended to be at 5v with no reverse bias. The purpose is to try and test under conditions that most accurately reflect what your product is doing in real life. Testing using the old standards may well yield unrealistic results. As a further example, no-clean fluxes tested at 85/85 would be volatilised off the surface at this elevated temperature. New recommendations now under consideration are to test no-cleans at 40C/93RH - that way we can better see if there are any ECM issues. The dielectric withstand in CC-830 requires the coating to be tested to TM-650 2.5.7.1 and "there shall be no disruptive discharge evidenced by flash-over (surface discharge), sparkover (air discharge) or breakdown (puncture discharge). The leakage rate shall not exceed 10 microamperes." I hope this helps -- Regards Graham Naisbitt [log in to unmask] GEN3 SYSTEMS LIMITED (Formerly Concoat Systems) Unit B2 Armstrong Mall Southwood Business Park Farnborough, Hampshire GU14 0NR Phone: +44 (0)12 5252 1500 Fax: +44 (0)12 5252 1112 www.gen3systems.com On 8/3/06 19:49, "Joyce Koo" <[log in to unmask]> wrote: > Dear SIR, > could you kindly provide the update info regarding the maximum bias for the > conformal coating SIR test? Is it still 333 V/mm? assume I use read out at > 100 Vdc and bias at 50 Vdc for the B-25A, am I right that bias max is > 333V/mm and read out is at 666V/mm spacing? Thank you very much. > Best regards, > jk > ps. I know Concoat recommend low voltage bias, but the current test method > 650-2.6.3.4 is still high voltage. (50Vdc bias)... by the way, anyone has > table regarding the dielectric withstanding voltage per IPC-CC-830? Many > thanks.) > > --------------------------------------------------- > 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 -----------------------------------------------------