Electronics Forum | Wed Mar 19 21:01:49 EST 2003 | Rob
I would suggest creating a special reflow profile, heating the board up to 130C about 50 c below eutectic point (183C). Then applying heat to only the BGA, this will prevent thermal shock to surrounding components.
Electronics Forum | Thu Mar 20 14:17:39 EST 2003 | MA/NY DDave
Hi I don't think I will enter this too much except for one of your questions. YES multiple reflows affect reliability. Heck most everything affects reliability. Aggressive Heat cycles or Heat always affects the final MTBF reliability number. The
Electronics Forum | Tue Oct 04 12:49:59 EDT 2005 | patrickbruneel
The amount of times the tin/lead solder can be melted and solidified is unlimited and the heat cycles do not affect the solder characteristics. The only reason for changing the solder pot is when impurities are at or over the maximum levels.
Electronics Forum | Wed May 15 16:07:23 EDT 2013 | rgduval
We've recently acquired a Rayco Aqua Blaster 1250 from an equipment auction. As with a lot of used equipment, it did not come with a manual or documentation. I've finally got a DI system hooked up, and am working on getting the washer going. But,
Electronics Forum | Mon Nov 27 13:36:24 EST 2006 | cyber_wolf
The fluid heats up to 105-110 from the ultrasonics running, and or from the fluid filtering pumps. The rinse temp is always the same as the wash. It is a single tank with a partition welded in between. (One side rinse, and the other side wash) FYI
Electronics Forum | Wed Sep 01 14:58:59 EDT 2004 | Shean Dalton
To address the last sentence of the recent posting, Austin American Technology does have experience with board cleaners as described. More recently AAT developed a cleaning system simliar to your description called the AquaBatch. The AquaBatch was
Electronics Forum | Mon Apr 17 15:39:35 EDT 2023 | tey422
That's depend on how many wash cycles you would need to completely cleans the board within 1 batch. Most of times you would need more than 2 wash cycles (that's already about 30 mins just 2 wash cycles), it can be up to 5 wash cycles alone. Also kee
Electronics Forum | Fri Dec 16 08:00:26 EST 2005 | jax
What you are most likely dealing with: Insufficient Pure Sn layer ( multiple causes ) Because elevated temperatures accelerate the diffusion process, the thickness of the Pure Sn layer will reduce during every thermal cycle... ( bakeing PCBs, S
Electronics Forum | Fri Apr 10 12:23:27 EDT 2015 | utosun
The recommended wash concentration for stencil cleaning with VIGON SC200 is 25% and this should be confirmed using the ZESTRON BA-20 bath analysis kit. Additional cleaning recommendations are: Wash temperature should be approximately 25 degrees C. /
Electronics Forum | Wed Dec 27 20:33:50 EST 2006 | greg york
water alone especially cold is not good enough, how do you check for hasl fluids when most residues left behind after improper cleaning are non ionic. Use 40C saponifier followed by heated rinse then cold rinse then DI rinse followed by dry.Nylon bru
