Electronics Forum | Fri Jul 13 18:25:09 EDT 2007 | seankim10
It sounds like more has to do with plating. you may also check out the voiding issue especially if you have new FAB or the supplier. I had problems with a RF chip in QFN package due to insufficient grounding that voiding caused. This ground is often
Electronics Forum | Thu Jul 05 22:56:53 EDT 2007 | gyverlo
Hello Sirs: Recently we are having an issue with environmental stress (high humidity or moisture), so we decide to apply conformal coating on our motherboard to protect via holes. According to IPC-A-610D, spec of thickness for type AR is 0.03~0.13 m
Electronics Forum | Thu Jul 12 16:14:20 EDT 2007 | realchunks
Hi Scott, Hard to tell what kind of problem you really have. I guess you need to describe your process first. What kind of process are you using. Wave solder, reflow solder, etc.. What kind of flux are you using to solder with? Vaccum? What ar
Electronics Forum | Thu Jul 12 20:20:31 EDT 2007 | seankim10
I�m having problem with PCB with 16mil thickness due to warpage. the board convex up in the middle after 1st reflow. It seams the warpage is caused by CTE mismatch between PCB and multiple TSOP's, which are covering ~80% of the bottom side board area
Electronics Forum | Mon Jul 16 16:02:08 EDT 2007 | ck_the_flip
I have zero experience with SN100c, but hey, how much different can it be from Sn63Pb37?! We solder large connectors all the time - sometimes these connectors reside on a ground plane area. We've been able to overcome hole fill issues (on 63/37) th
Electronics Forum | Thu Jul 19 06:43:54 EDT 2007 | allgood
Hi Thanks for the input. Problem is only ever the A12 plastic tip (no damage ever seen on any other tool). I suspect we have not helped by skipping the retrim operation when we have changed a part so we'll do that but also I just discovered setti
Electronics Forum | Thu Jul 19 17:10:43 EDT 2007 | jamyboy
You might want to check the Xwagon bearings. We had the same issue with the TP9-UFP we ordered all the possible parts Xmotors small large, encoder, transducer, couplings etc. over 10K worth of parts. The only thing we didnt order was the actual x-wag
Electronics Forum | Fri Jul 20 07:25:51 EDT 2007 | chrispy1963
If you still have trouble with this problem try calling MyData and ask their opinion. I know this sounds simple and maybe you have tried already, but I have found in the past that there are certain techs who really know their stuff. Glen Gayton in B
Electronics Forum | Mon Jul 23 22:14:36 EDT 2007 | fastek
Sorry guy.........just trying to state the obvious is all. Not an accountant....just an old equipment guy around since the days when thru-hole equipment ruled the earth. But until you get some proper training, no amount of staying late and working
Electronics Forum | Thu Jul 26 10:28:38 EDT 2007 | realchunks
Sounds like our old friend Moonman. He used to rant on this forum about a year ago. He claimed to find a new metal that was never discovered before. One can only assume it is the same old made up stuff he blathered on about here. I like how they
