Electronics Forum | Mon Nov 24 10:41:29 EST 2003 | ilona
Hi, there is also a German company making odd-shaped component insertion equipment, actually very very suitable for LED placement and soldering in the same process cycle. LED's are held in position until soldering is complete, straight and in the s
Electronics Forum | Tue Mar 20 15:59:15 EDT 2007 | blnorman
We use preprinted labels and laser coding. For PCB we laser mark with CO2 (NdYAG for the aluminum heat spreaders). We either have an epoxy legend to burn out or we burn the solder mask to expose the copper ground plane underneath. Laser is a much
Electronics Forum | Mon Nov 12 09:22:41 EST 2007 | devajj
BTW, The surrounded QFN fine pitch terminals > should have the normal aperture reduction of 7 % > in case of RoHS Senju solder paste. This works > for our Telecom customer. > > The vias in the > ground pad will be somewhat filled with solder >
Electronics Forum | Tue Feb 10 00:57:50 EST 2009 | emmanueldavid
Philip, Pl note that there is one more fabricator from Malasia, whom we found to be up to the mark with Wave Soldering Pallets constructed with Durastone/CDM Durastone. They also offer ESD Protected to match ESD guidelines of Assembly & Photo Sensi
Electronics Forum | Tue Feb 10 01:18:28 EST 2009 | emmanueldavid
Philip, Pl note that there is one more fabricator from Malasia, whom we found to be up to the mark with Wave Soldering Pallets constructed with Durastone/CDM Durastone. They also offer ESD Protected to match ESD guidelines of Assembly & Photo Sensi
Electronics Forum | Mon Mar 08 19:52:54 EST 2004 | Ken
I have processed the following materials in lead free processes: CEM FR1 FR4-120 FR4-140 FR4-170 Each material has different responses to thermal stresses. Issues to consider are: Panel size, smt only, wave only, double sided smt...and smt / wave
Electronics Forum | Tue Mar 13 13:13:39 EST 2001 | cebukid
Not to toot my own horn, but ever since I came on board at my company, wave solder defects have gone down by 35%. This was due mainly to a new flux and a process control system that I implemented back in '99. Now, the metric used was DPMO. How do
Electronics Forum | Thu May 04 10:29:40 EDT 2006 | Chunks
"Bending nozzles" "Changing dwell times" "Navels" (!!!!!!!!!??????????) And probably not taking responsibility when the poop hits the fan cause "you're just an operator". Not knowing your boards, but estimating your time scenario, I'd say you're sol
Electronics Forum | Mon Jun 07 12:22:44 EDT 1999 | Chrys Shea
| I'm encountering a new problem at my new company that I haven't encountered before in my past life - and that's Wave Soldering VIA holes. | | We've been getting a rash of defects that we call in this company, "insufficient solder in VIA hole." The
Electronics Forum | Thu Feb 15 16:58:11 EST 2007 | flipit
Phil, I used to print solder paste on 2" X 2" and 3" X 3" 96% Alumina substrates all the time. I used standard solder printers and stencils. Screens are difficult to use and don't print well. You can use a stencil on a DeHart, CW Price, or AMI Pr
