Electronics Forum | Tue Jan 17 12:06:12 EST 2012 | cobham1
The via's are cracking which then is causing all kinds of problems.
Electronics Forum | Thu Jan 12 14:17:07 EST 2012 | blnorman
How are the vias failing? Barrel crack?
Electronics Forum | Fri Jan 13 13:22:34 EST 2012 | mosborne1
I would recommend that you turn toward your PCB supplier probably China and talk to them. You should always bake your boards if this occurs. If you purchase them form a trusted source you should store them in a McDry until you use them if possible. I
Electronics Forum | Thu Jan 19 12:38:03 EST 2012 | cobham1
I am wondering if the failurs that people see are discovered right away or when the units are out in the field. Reason I ask this follow up question is the units that are having problems are all returns from our customers. Is there a way to check for
Electronics Forum | Wed Jan 11 14:54:36 EST 2012 | cobham1
With a large number of you out there building rigid-flex boards. I am wondering first what kind of profile do you use and what are you peak temps. I ask these questions because we are finding that our boards have a high moisture level and we are also
Electronics Forum | Thu Jan 12 20:11:25 EST 2012 | davef
Isola water pressure. Between a 210°C normal tin lead cycle and a 250°C lead-free assembly cycle, the vapor pressure doubles. Reflow temperature [*C]||Vapor pressure of water [psi] 150||100 200||225 210||260 220||320 230||400 240||480 250||580 300||1
Electronics Forum | Thu Jan 12 13:18:07 EST 2012 | swag
215 to 220 deg.C peak reflow. We bake then store all PCB's in low humidity cabinets (appox. 3% RH) prior to running.
Electronics Forum | Fri May 08 15:12:23 EDT 1998 | Ryan Jennens
I am running boards with gold fingers on a pallet for masking purposes. The pallets worked fine for a while but know the gold fingers are getting solder on them. We have tried everythin: new pallets, cleaning the pallet and board to be sure there
Electronics Forum | Fri Jun 12 08:37:21 EDT 2015 | cgreiner
Check to insure that cut outs in the PCB is not triggering the board sensor on the input of the unit. We had a few boards where the cutout in the board was seen as the end of the board and it would stop several inches from the board stop. We ended
Electronics Forum | Mon Aug 13 08:00:46 EDT 2007 | davef
Are the components that fall from the board solderable? Is the board solderable? Where is the solder for the components that fall from the board [eg, on the pads, on the component]?
