Electronics Forum | Wed Nov 23 20:12:53 EST 2005 | davef
Search the fine SMTnet Archives for background on BGA void, while you're waiting for others to respond
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 | Tue May 30 15:53:33 EDT 2006 | slthomas
I can't believe I waited 4 days to read this. Freakin' brilliant! SMTGCE's got nuthin' on you, dude.
Electronics Forum | Wed Oct 15 18:00:42 EDT 2008 | davef
While you're waiting for others to reply, look here for a recent thread from the fine SMTnet Archives: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=56867
Electronics Forum | Sat Apr 04 09:41:50 EDT 2009 | davef
While you're waiting for others to replay, search the fine SMTnet Archives, here's an example: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=38918
Electronics Forum | Fri Jul 16 06:22:31 EDT 1999 | Wayne Sanita
Mark, I had the same peoblem. For my stencils i use a 15% reduction for the width of fine pitch leads only, as Earl said follow the 1:1.5 standard. We consider pitches of 32mil and under. We also clean the stencil every other board to ensure no caki
Electronics Forum | Thu Mar 18 18:40:15 EST 1999 | Marc Ruggiero
| | | Hi folks, | | | | | | I am looking for inputs on a long-standing problem encountered in our shop: Bottom-side parts (passives) falling off in the Wave...where the only remnants of the part is a flattened glue dot of proper diameter and volum
Electronics Forum | Sat Dec 04 18:55:38 EST 2004 | Grant
Hi, Yes, all you really need to do is boil the fluid while suspending the PCB above the vapor, so it's quite easy. However I would recommend against dropping the board direct into the vapor cloud, as that would be a very fast warm up, while letting
Electronics Forum | Wed May 04 08:52:42 EDT 2005 | loz
I would imagine you would end up stressing the stencil, as you will be continually contacting the stencil in different places. Also damage one stencil with four images on it, and you will end up waiting for new stencil to arrive. You then have four o
Electronics Forum | Fri Dec 22 07:11:32 EST 2006 | billyd
Wait a second... 10 to 15 mils at toe end. How are you doing that? See, the ones we did have a bit of a time with had no catellations on the outside. So, it's like a BGA in that regard. All your paste goes under the part, so if it's not even, or if i
