Electronics Forum | Thu Aug 03 12:51:20 EDT 2006 | Ofer Cohen
I'd appreciate your support in the following issue: A significant batch of PCBs failed on de-lamination. The failure was identified, of course, only after the assembly. There is a big variety of components (BGA 1mm, BGA 0.8 mm, FQPs and other SMT co
Electronics Forum | Thu Aug 03 12:51:59 EDT 2006 | Ofer Cohen
I'd appreciate advise in the following issue: A significant batch of PCBs failed on de-lamination. The failure was identified, of course, only after the assembly. There is a big variety of components (BGA 1mm, BGA 0.8 mm, FQPs and other SMT componen
Electronics Forum | Tue Jan 30 09:26:59 EST 2007 | CK Flip
I think most people don't "get" soldering, and advocate the "more-is-better" approach as if solder were duct tape - you know...the more duct tape you put on something the stronger the bond. Such is NOT the case with soldering. People don't "get" that
Electronics Forum | Tue Jan 30 17:58:49 EST 2007 | flipit
Hi, I would not be too concerned about what the shape of your wirebonding fiducial is. Cross, Square, Diamond, Circle, will all work well for you. I use a "+" and a diamond. Your machine magnification will be great, so don't make the fiducials to
Electronics Forum | Fri May 25 08:06:19 EDT 2007 | davef
Soldering PTFE boards * Exposure to the high temperatures needed for solder reflow poses no problem of loss of peel strength since the exposure times are relatively short. * There are many different types of PTFE based products that may perform diff
Electronics Forum | Tue Aug 21 05:05:52 EDT 2007 | vangogh
Hi All, I would like to get some inputs regarding this.... I have bare PCB which were stored with kapton tape attached on the Au plated pads. These were stored for close to a year. Upon removal of kapton tape, we noticed discolorations on the edges o
Electronics Forum | Tue Nov 20 20:26:54 EST 2007 | davef
Peter: The above link to the the picture of the assembly is broken. Comments are: * Yes, RTV is completely useless for applications like you describe. Epoxy is a much better choice. * Dave G, in an archived thread on SMTnet, talks about using 3M Jet
Electronics Forum | Thu Mar 06 11:48:09 EST 2008 | muse95
Black pad with IAg??? Tarnish is NOT black pad. Tarnish is usually just some silver sulfide on the surface and can also usually be soldered through, by using a little additional, or slightly more agressive, flux, and still make a good quality solder
Electronics Forum | Thu May 01 10:51:09 EDT 2008 | realchunks
You need a paste designed specifically for this. They are available. Most have 2% silver in them and higher temp flux so you can reflow at "no-lead" temps. The silver aids in the intermaetalic bond and the high temp flux allows you to reflow the n
Electronics Forum | Sat Feb 28 06:34:28 EST 2009 | emmanueldavid
Exsydeco, I speculate how You did not look forward to claim Your due Pay Checks for whopping 120 Days !!! It would've been much better if You associated with Local Administrative Bodies in Italy however You was there for long 8 Months and knew what
