Electronics Forum | Fri Aug 24 04:58:54 EDT 2007 | gsala
Thank you Davef, by googling 2512 R (plus Lead Free) I found plenty of interesting informations about the subject. What I have seen 2512 R is one of the "hot" smd chip resistor used for several Reliability Test Vehicles or Trials. Seen also availa
Electronics Forum | Wed Nov 07 11:27:28 EST 2007 | patrickbruneel
Grant, Thanks for sharing that experience with us; this comes to show what damage can be done when politicians make laws based on rumors instead of facts. New laws as drastic as removing lead in soft soldering should have been based on scientific e
Electronics Forum | Mon Sep 29 17:45:40 EDT 2008 | dwk
Thanks for all your input. We have investigated 2 options other than the current system. Currently supplying one SSM with N2 via "Canister" system 230L Cryogenic... The options are to increase the reservoir to a fixed 2000L Cryogenic bulk tank syst
Electronics Forum | Sun Sep 13 09:21:26 EDT 2009 | davef
You as, "What data is available showing the long term reliability of the intermetallics of the solder joints?" Alloy||Microstructure Sn-Pb||Lamella or globules Sn-Cu||Sn-matrix, Cu6Sn5 needles or globules Sn-Cu-Sb||Sn-matrix, cuboids of SbSn and Cu6
Electronics Forum | Sun Oct 11 21:19:51 EDT 2009 | fulldrawmike
we have both flexjet and flexhead, we also have the new inline 7 head on some genesis dual beams we just put into operation. If you have a choice in flexjet heads take the inline 7. The flexjet 09 head is very labor intensive, stay away from them, e
Electronics Forum | Mon Sep 10 08:40:21 EDT 2012 | donkudner
After selecting a few ovens based on the mfr's specifications, I plan to send them a thermal "slug" to run in their ovens (a 1/4" thick, high temp fiberglass slab with imbedded thermocouples). Since we are replacing ovens with fixed speed blowers wit
Electronics Forum | Thu Apr 28 01:30:54 EDT 2022 | sophyluo1985
Achieving high reliability and high efficiency in SMT process (Surface Mount Technology) assembly has always been the goal of electronics manufacturers expecting consistency. It depends on the optimization of every detail of the whole process. For SM
Electronics Forum | Thu Apr 28 01:40:14 EDT 2022 | sophyluo1985
Advantages of SPI 1. Reduce defects SPI was first used to reduce defects caused by improperly printed solder paste. Therefore, the primary advantage of SPI is its ability to reduce defects. Defects have always been a major problem when it comes to
Electronics Forum | Mon Aug 27 15:06:29 EDT 2001 | davef
This otta push Wolfgang over the top ... Recommended reading G.G. Harman, Wire Bonding in Microelectronics : Materials, Processes, Reliability, and Yield, 2nd edition, McGraw-Hill Electronic Packaging and Interconnection Series, 1997. G.G. Harman, R
Electronics Forum | Tue Aug 03 17:28:33 EDT 1999 | DLKearns
| | | I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone know