Electronics Forum | Mon Apr 28 16:36:11 EDT 2003 | razor
Component: Termination (barrier) NI, 120/3.0 um Solder Plate (outer) 90% Sn, 10% Pb, 120/3.0 um Solder: Multicore CR39, 95.5%Sn/3.8%Ag/.7%Cu @ 6mil Flex PCB: Cu, Ni, Au .2m to .5m Thanks
Electronics Forum | Thu May 08 10:16:17 EDT 2003 | davef
Observations are: * Center most lead of the fuse on the top right of the assembly looks like it has excellent solder flow, but this is PTH. From the amount of solder, it must have been wave or hand soldered. * Center most lead of the fuse on the bot
Electronics Forum | Mon May 12 23:28:33 EDT 2003 | dehlers
To the best of my knowledge and experience the 2 % Ag component is not for embrittlement but rather to reduce gold scavenging caused by the propensity for tin to react with the gold. I have seen eutectic tin/lead actually disolve gold wire after a f
Electronics Forum | Thu May 15 03:14:33 EDT 2003 | Hon Choi
Dear all, Not sure if you have this experience, but we've been seeing shorts on the BGA's from a widely known supplier "i". These shorts can not be found on the X-Ray, and when we remove the BGA, the component is ok. We peeled a few BGA's off, and
Electronics Forum | Thu May 22 18:47:12 EDT 2003 | russ
I would assume we are talking about a radial leaded electrolytic cap? We use Electronic grade RTV (Dow corning 3145). It sticks good and can be removed if necessary. It is also pliable so you don't have to worry about CTE or other stresses that may
Electronics Forum | Thu May 29 07:06:36 EDT 2003 | stefwitt
Phil, as a rule of thumb, measuring machines (such as Zeiss, View and others) should be ten times more accurate, than the placement machine, in order to provide measuring values (CPK). AOI are meant to detect missing and wrong components, but not mea
Electronics Forum | Mon Jun 02 14:53:52 EDT 2003 | scottefiske
We are currently looking at a CS-400D component > locator with automatic cut & clinch from contax > ltd .Anyone who has had good or bad experiences > with this type of equipment and are prepared to > share,it would be much appreciated. Are you b
Electronics Forum | Wed Jun 11 17:16:12 EDT 2003 | MA/NY DDave
Hi I had to poke around awhile to see what you meant. I think you were at an advanced level where IF he knew the MSL ratings of his devices he should constrain his profile within the component mfgs tests for exposure to various profiles, or at leas
Electronics Forum | Mon Jun 09 17:41:45 EDT 2003 | davef
Welcome. You have selected a fascinating area to work. "What is delta temperature? Depends on what someone is talking about. Here's some possibilities: * In process equipment definition, the difference in temperature from one side of conveyor to
Electronics Forum | Thu May 06 17:17:59 EDT 2004 | Bruce
I am glad this thread is still alive as I have a concern. I have just entered the wave soldering business after many years in smt. After wave I am getting icicles or flags on my component leeds. My temps seem to be all with in spec as does my NC flux
