Electronics Forum | Wed Jun 07 21:07:07 EDT 2000 | Dave F
Ooooops, I messed that up!!!! It should read: Point well taken John. Expanding on epoxies: Novolac is a multifunctional epoxy ... a phenolic resin. Most phenolic resins are made using phenol (P) and formaldehyde (F). They comprise the bulk of
Electronics Forum | Tue Mar 20 15:55:59 EST 2001 | CAL
I only inhale flux with a high IPA content.(joke for those who don't know me) I have seen the inside of duct work for our wave soldering machine............NASTY! DAVE F. is right! Flux contains a lot of bad stuff- Chlorides, Bromides, Flourides,
Electronics Forum | Tue Mar 20 15:59:27 EST 2001 | CAL
I only inhale flux with a high IPA content.(joke for those who don't know me) I have seen the inside of duct work for our wave soldering machine............NASTY! DAVE F. is right! Flux contains a lot of bad stuff- Chlorides, Bromides, Fluorides,
Electronics Forum | Sat Dec 04 09:33:18 EST 1999 | Christopher Lampron
Hello Russ, I believe that the dullness in color of the solder joint is related to the gold finish on the pads. I have had done alot of thru hole soldering of gold pins as well as SMT on gold finish and have seen the condition that you are talking a
Electronics Forum | Fri Aug 20 10:18:32 EDT 1999 | Dennis Fall
I have a layer of electroplated solder (10/90) that appeares to have some sort of contaminent on it. Water will not wet to the layer in some areas. I have tried using 10% HCl in DI as a cleaner as well as 7.5% Fluoboric acid in DI. Neither has tou
Electronics Forum | Fri Sep 14 13:07:06 EDT 2001 | bschreiber
Dave, The saponifier (or any additive) will supply free ions and contaminate the DI water. If no contamination is introduced (very difficult) or if fresh hot DI water is constantly added as in a steam age chamber, the DI water will begin to obtain
Electronics Forum | Tue Dec 04 12:49:49 EST 2001 | bcaler
We use a Hach digital titrator. You can buy a digital titrator kit, hydrochloric acid, phenolphthalein indicator powder pillows, turkey baseter (or some bulbus sucking device) and a couple small measuring cups. We do tests twice per shift (more is
Electronics Forum | Wed May 08 23:48:01 EDT 2002 | ianchan
Hi mates, someone told us to use mild HCL acid 5% to 10% solution and submerge the LCC parts into this solution. hopefully this will clean off the varient copper oxide layer on the LCC leadless terminal wall. after the HCL soak, submerge the parts
Electronics Forum | Thu Apr 10 20:57:03 EDT 2003 | Ray Chartrand
I've also seen "as received" defective devices. A tier 1 EMS I was working with put down an entire shift worth of these devices before it was noticed. Their rework costs were $$$. Just goes to prove that there's no free ticket and when bean counters
Electronics Forum | Tue Jun 29 13:52:32 EDT 2004 | microniks
Where to find detailed information on fluxes? No one seems to know the real difference between Rosin fluxes with colophan, Resin fluxes or synthetic Resin fluxes, No Clean, Low Residues, VOC-Free, Halide-Free, Water Washable with alcohol base, Resin-
