Electronics Forum | Mon Feb 26 09:36:08 EST 2001 | blnorman
ASTM E 443 is a test for sulfur by Oxygen Flask Combustion. Other instruments will detect sulfur (I assume a SEM with EDS capability will pick up the sulfur). We had an addition cure silicone potting compound inhibition problem last year that was t
Electronics Forum | Sun Feb 06 15:26:32 EST 2000 | Carol Zhang
I have a board which contains brass spacers. The spacers will pass through the wave during soldering. I found a silicon-rubber cap that can prevent solder climbing up into the spacer. However, the cap influence the wave flow and reduce the solderabil
Electronics Forum | Wed Jul 21 19:16:53 EDT 1999 | Dreamsniper
Which among the two profiling method is more reliable/accurate in getting the oven thermal profile? a) using a HIGH-TEMP solder wire then soldering the thermocouples onto the profile points of the board (e.g. component lead etc.) b) not soldering t
Electronics Forum | Wed Feb 03 18:40:06 EST 1999 | Earl Moon
| Has anyone use this metal before? | | LOOKING for a process for using this metal. | Any feedback will help. | | Thanks | | Tony A | Yes. Cannot remember it all, but used in microelectronics industry. Germanium was used in diodes early on befor
Electronics Forum | Tue Jun 02 17:36:43 EDT 1998 | Chris Fontaine
| | We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not
Electronics Forum | Tue Apr 02 11:21:46 EST 2002 | BTaylor
davef I assume this question is for my reply and me. We used a dexter\hysol underfill and a Camalot 5700 to dispense.Single line technique next to a small IC with 14 bumps around the perimeter.The conformal coating was applied with a small brush aro
Electronics Forum | Mon Aug 04 10:28:55 EDT 2003 | jseagle
Dave, Where can I get the rubber boots you are talking about? We are going to have to start doing 100% conformal coating of boards for some of our customers in high volume, we currently only do a selective coat. We currently use a silicon coating,
Electronics Forum | Fri Jun 04 14:03:18 EDT 2004 | Frank
I know Juki has the headquarters in NC, but they have a support office in the Silicon Valley with spare parts. I know they go to the NW area quite often from that office. They offer their customers 7-day/24-hour free phone support (including holida
Electronics Forum | Wed Oct 27 13:20:47 EDT 2004 | DavidB
We are producing boards with Alpha 591S RMA No-Clean paste and are coating after SMC with Dow silicone ( toluene solvent based) conformal coating. We have experienced several failures due to soft shorts ( electrochemical migration?) We have also obse
Electronics Forum | Fri Aug 05 12:13:28 EDT 2005 | spommer
As part of our conversion to lead-free, I'm redesigning a pcb that had switch contact patterns screened on the board using carbon ink. On the new board, I plan on using the ENIG process and having the switch contacts be patterns of copper with the n
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