Electronics Forum | Fri Apr 16 08:20:58 EDT 2004 | Bob L.
We've seen problems with BGA balls breaking at in-circuit test. I did some bend testing and found that our large BGA's can handle amazing stresses at low strain rates but we get brittle fractures at high strain rates, especially with Ni/Au surface f
Electronics Forum | Mon May 24 05:53:24 EDT 2004 | johnwnz
Here's an interesting fact, some pastes just don't wet as well as others!.. there I've said it and now people will complain but that's life. Some pastes are formulated to run in air, some in N2, soem are specifically designed to be more aggressive fo
Electronics Forum | Mon Aug 30 15:41:35 EDT 2004 | Frank
Hi, In 2006 we will need to produce Lead free PCB and for now it's hard to get answer to my questions. I'm from Canada and the PCB vendors we actually have are not ready to produce Lead Free PCB ( HASL Lead Free ). For sure OSP (Entek) is not good
Electronics Forum | Mon Jan 31 16:59:22 EST 2005 | frankracine
Hi Jay, Concerning you PCB, what TG do you expect to use for your lead free process? On my side I have a problem. I order PCB from Canada and from China. My PCB vendor in china is producing a lot of OSP and ENIG PCB, no HASL lead free and in Cana
Electronics Forum | Thu Mar 24 07:06:06 EST 2005 | davef
There's a lot of comparison tables on the web. Here's one: Properties - Summary [A Winlow Circatex] Attribute||Hasl||Immersion Silver||Immersion Tin||Electroless Pd||OSP||Eless Ni / Imm Au Shelf Life (months)||12||12||12||12||12||6 Multiple Reflows
Electronics Forum | Fri Apr 15 10:47:09 EDT 2005 | patrickbruneel
Dhanish, If I understand correct your ICT doesn't detect shorts and only measures capacitive and resistive values. The webbing as Ken mentioned would have a resistance because this is caused by a lack of flux and the web is mainly tin oxide, which w
Electronics Forum | Thu Jul 28 09:47:06 EDT 2005 | fctassembly
Hello Carl, The main reason there is little information on lead free soldering to ENIG is because most of the lead free soldering to date has been Japanese consumer products. To keep costs down, the major surface coating used has been OSP copper. It
Electronics Forum | Tue Aug 09 11:57:11 EDT 2005 | Board House
Hi Ted, I am a Sales Manager for a Circuit board Manufacture in MN. We have seen the Majority of our Customer base switch to Enig do to shelf life issues of silver and Tin. Silver, Tin & OSP all have a shelf life between 6 - 8 Mos. Enig is betwee
Electronics Forum | Mon Mar 13 04:49:59 EST 2006 | Fhail
Hi All, I'm new in PCBA process. Recently in my leadfree production we encountered a missing ring on some of the ring on the board after we ran hem through Wave soldering machine. The board has gone through double reflow prior to the Wave soldering.
Electronics Forum | Tue Mar 14 13:42:45 EST 2006 | patrickbruneel
If the OSP boards have gone through double reflow I assume that you use an aggressive (halide) flux for wave soldering. SAC 305 is known (search the archives) to dissolve copper faster than other lead-free alloys. This together with an aggressive flu
