Electronics Forum | Tue Sep 21 13:24:17 EDT 2004 | GS
Hello, does any one please can tell me if any Standard says how much is the Total Ion Contamination ( ugr/NaCl sqcm equivalent, Br- in particular way) allowed on Connector surface/body ? (ie. DIMM connectors, and similar). Many Thanks in advan
Electronics Forum | Sat Sep 25 03:44:38 EDT 2004 | GS
Thanks Davef, unfotunately in order to keep TIC of PBA inside our customer TIC requirements, we have to pre-wash (DI water only)connectors before assembly. Too high level of Br- continuosly get released by connectors molding compound. Our assemb
Electronics Forum | Wed Sep 22 12:14:12 EDT 2004 | Ethan
Hello all, new guy here. We are a OEM SMT house running a high mix low volume factory with three lines of Fuji machines. We are looking to benchmark our operation from a materials, production and technical capabilities against other SMT houses. We
Electronics Forum | Thu Sep 23 02:52:21 EDT 2004 | johnwnz
olks, got one for you. What is the feeling on reusing SMT components that you have removed from an assembled PCBA? For example, you place your IC's and they are 180 deg out, you have to remove them.... but what about refiting the same devices? Are t
Electronics Forum | Thu Sep 23 13:14:22 EDT 2004 | Bob R.
We're just getting started in lead free, but the solder balling and poor wetting sounds like what we saw in some early experiments where we were investigating whether we needed nitrogen. Without nitrogen inerting we got just the kind of things you'v
Electronics Forum | Thu Sep 23 14:58:50 EDT 2004 | C Lampron
EMS-Engineer, Lead free alloys have a very low wetting creep. You probably will not ever get the same type of weting with a LF as opposed to SN 63/37. The question is if it is acceptable. Lead free solder joints cannot be inspected to the same crite
Electronics Forum | Mon Sep 27 11:30:05 EDT 2004 | grayman
Your problem is easy. Lead free solder is like 63/37 solder paste when it was started. We make things complicated. We believed before that lead free has high melting temp and will not produce good fellet so on.... The only thing you must do is to lo
Electronics Forum | Mon Sep 27 22:25:05 EDT 2004 | KEN
Minimal cost and low melting point??? Have you bought Indium or Bismuth based alloys lately? Tin/Silver, Tin silver coper-X you name it....there are trade-offs (cost / performance). Not all are exactly published or are suitable for all appliations
Electronics Forum | Tue Sep 28 19:54:22 EDT 2004 | KEN
If we are talking about Indium...then you will eventually be paying what everyone else is. The resource is diminishing especially with the application into the display markets. Same with silver. We are comming out of an all time low for silver....
Electronics Forum | Tue Sep 28 21:46:49 EDT 2004 | grayman
yes, in the future prices of China product will increase by 10 - 20 percent, but other may increase double. So still China price will stay competative. I am not for China,in fact most of our local companies went to China already, but hey, lets face
