Electronics Forum | Tue Jun 09 07:35:23 EDT 1998 | Steve Gregory
Hi there Gary, Your solder ball problem is very similar the problem I experienced, but I was using a water soluble paste at the time. It started by inspectors telling me that they were seeing cold solder on some SIMM's that we had built regularly. W
Electronics Forum | Mon May 31 21:50:59 EDT 1999 | Dave F
| | I have always thought it to be a good practice to wash SMA's with water soluble paste (WS609) soon after reflow. Is there a time limit as to how long a board should sit after reflow before washing said board? For instance; processing a double-
Electronics Forum | Wed Jan 28 19:39:08 EST 1998 | Steve Gregory
| | What is the lifetime for a typical solder paste ? | | How long can boards be stacked waiting before the paste goes off ? | Lifetime and tack time depends on: | - Manufacturer | - Flux/mixture | - Environmental conditions | Typical lifetime is dep
Electronics Forum | Mon Mar 29 09:33:37 EST 1999 | Chrys Shea
| I require some feed back from any one who knows about using a voc free flux in a nitrogen wave solder machine soldering both through hle and smt componants. | What disadvantages are there when using this flux? | Do you have any contact details with
Electronics Forum | Tue Mar 30 08:11:27 EST 1999 | George Steele
| | I require some feed back from any one who knows about using a voc free flux in a nitrogen wave solder machine soldering both through hle and smt componants. | | What disadvantages are there when using this flux? | | Do you have any contact detail
Electronics Forum | Thu Feb 27 18:07:13 EST 2014 | emesystems
The ISL12020 real time clock comes in a 20 lead DFN, and includes a 32kHz crystal in the package. The terminals of the crystal and oscillator come out to external pads and are highly susceptible to leakage to the neighboring power supply pins. With
Electronics Forum | Sun May 30 18:52:35 EDT 1999 | Graham Naisbitt
| | | | | | I have always thought it to be a good practice to wash SMA's with water soluble paste (WS609) soon after reflow. Is there a time limit as to how long a board should sit after reflow before washing said board? For instance; processing a
Electronics Forum | Fri Nov 13 08:27:43 EST 2009 | herman
Your customer is very unreasonable to demand void-free BGA SJs. Minor voiding is not a condition for rejection per IPC-A-610D, J-STD-001D, or even J-STD-001DS (Space addendum). Having said that, let me tell you that the voiding has little or nothing
Electronics Forum | Wed Jan 27 23:29:28 EST 1999 | parag palshikar
| | i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated tempe
Electronics Forum | Sun Apr 05 18:59:15 EDT 1998 | Graham Naisbitt
Jaqueline There are so many variables in the electronic assembly manufacturing process involving more than 12 different chemistries, that it is impossible to easily identify and determine the nature and reason of such residues. GEC Hirst Research in
