Electronics Forum | Tue Sep 01 10:32:51 EDT 1998 | Ben Salisbury
| We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon bed, mixed resin bed, ca
Electronics Forum | Wed Feb 02 16:36:22 EST 2000 | Mike Konrad
As the manufacturer of the Zero-Ion, I must correct one statement made by Dave F. According to the EMPF report sited in Dave�s response, �Static� based systems actually are more susceptible to carbon Dioxide adsorption than �Dynamic� based systems.
Electronics Forum | Mon Mar 21 09:33:25 EST 2005 | davef
RoHS Substance||RoHS MCV Limits||Typical Testing Approaches Lead||1000 ppm* ||Wet chemical digestion followed by ICP (Inductively coupled plasma) or AAS (atomic absorption) spectroscopy ||||XRF (X-ray fluorescence) spectroscopy Cadmium||100 ppm ||Wet
Electronics Forum | Fri Dec 01 15:37:50 EST 2000 | Dason C
Jim, you may need to look with different paste instead of the cleaning solvent. Please advise what is the paste which you currently using? Beside, when you talking about the board stayed in hot area, is it a drying area or the cleaning zone. If it
Electronics Forum | Mon Dec 18 04:03:30 EST 2006 | greg york
Good solvent wipe will normally show some discoloration of the same colour as resist, but not scientific enough as you cant gauge the amount coming off, ideally none. But is an indicator of the issue. I have been meaning to do a swab with an indicato
Electronics Forum | Sat May 17 09:12:50 EDT 2008 | davef
Lead-free means expensive tin. Tin is an excellent solvent. So, metal parts in contact with molten tin must be expensive enough to resist that nature of tin. To learn more about this: * Search the fine SMTnet Archives * Look here: "Liquid Tin Corrosi
Electronics Forum | Tue Aug 14 21:43:44 EDT 2001 | mugen
Basic understanding, 1) the 2% silver (Ag) gives better shine *joint surface*. 2) Ag improves stength & fatigue resistance of solder joints 3) reduces leech-out of silver from silver-base substrates (eg of such silver-base surface contact: metalli
Electronics Forum | Tue Sep 01 17:18:25 EDT 1998 | Dave F
| | We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon bed, mixed resin bed
Electronics Forum | Wed Nov 19 20:07:05 EST 2008 | davef
First, it's GREAT to have a long-term lurker posting here on SMTnet. Maybe this will encourage other lurkers to join us. [We'll try to be on our best behavior.] Second, while Stephen Pence's explanation of 'equivalence factors' is accurate, your con
Electronics Forum | Sat May 30 18:09:17 EDT 1998 | Earl Moon
| Got handed an assignment for which I'm not totally qualified. Don't expect this forum to had me all the answers. Some answers are obvious as the device types are fairly self explanatory. | As everyone knows, IBM had problems with their ceramic BGA
