Electronics Forum | Fri May 28 17:44:51 EDT 1999 | Glenn Robertson
| I discovered that we have some gold plated (30 mico in.) through hole connectors which were Paste In Hole soldered (60 sec at reflow) on a HASL PCB. Do we have an embrittlement reliability issue? The calculated volume % of gold in the joints is abo
Electronics Forum | Wed Sep 09 21:20:26 EDT 1998 | Simon Ting
hi, 1206 capacitor with silver/palladium termination is mounted onto a ceramics substrates. Bonding is achieved through conductive epoxy. We discovered that the epoxy cracked and this caused missing capacitor. We had tried different grade of epoxy,
Electronics Forum | Thu Sep 10 09:47:15 EDT 1998 | Earl Moon
| hi, | 1206 capacitor with silver/palladium termination is mounted onto a ceramics substrates. Bonding is achieved through conductive epoxy. | We discovered that the epoxy cracked and this caused missing capacitor. We had tried different grade of e
Electronics Forum | Thu May 07 21:36:26 EDT 1998 | Dave
| We just purchased Mitron/GR Software's CB97. | We have Universal's 4790 and Contact's 3AV machines. | Both these machines part libraries are in binary format | and their respective software packages cannot export out | into ASCII. | Has anyone out
Electronics Forum | Mon May 11 13:34:16 EDT 1998 | Peter
| | We just purchased Mitron/GR Software's CB97. | | We have Universal's 4790 and Contact's 3AV machines. | | Both these machines part libraries are in binary format | | and their respective software packages cannot export out | | into ASCII. | | Has
Electronics Forum | Fri Mar 20 12:30:45 EST 1998 | Bill Schreiber
Smart Sonic introduces the first "No Risk" Guarantee for SMT Stencil Cleaners. No more shopping for a machine from one vendor, a chemical from another vendor and waste treatment process from a third vendor. Only to discover when the process fa
Electronics Forum | Sun Dec 09 22:54:20 EST 2001 | dburr
It sound you have already discovered to root cause, flux entrapment in the via holes. Short of changing the desing, here are sone suggestions. The main thing is you have to dry out the via holes of the wet flux. Some things to try are: slow down t
Electronics Forum | Tue Mar 05 20:00:47 EST 2002 | rwilliams
I have recently been handed all responsibility of our Reflow Ovens. Upon my inspection, I discovered that any possible device on the ovens that you would think would require calibration, has a sticker indicating no calibration required. The practice
Electronics Forum | Thu Sep 19 02:45:33 EDT 2002 | bugsjoe
Thank you ur reply Dave. Let me explain our COB workflow: 1. unpack PCB (FR4,LPI,HASL)(the thickness of gold and nickel we can't be find)(No SMT before) 2. clean the pcb by rubber 3. blow the pcb by di-ionic gun 4. attach die by adhesive gel 5. cure
Electronics Forum | Thu Nov 07 12:51:09 EST 2002 | slthomas
This is embarassing. I've used ipa (actually "70/30 rubbing" alcohol) to clean these for a better view (this is a no-clean), and found the above described anomaly to be intact. So, I assumed it was something in the solder itself. Well, today I us
