Electronics Forum | Thu May 10 19:22:06 EDT 2007 | joeherz
We have a board that requires a .015 - .035" finished lead length which requires us to do mass lead trimming. To this point we've performed this activity on parts with straight leads. We're looking at going to an axial auto-insertion process (outso
Electronics Forum | Wed May 30 14:14:31 EDT 2007 | jeremyl
We are making a socketed version of the boards, but it forces some compromises that will degrade performance. In talking to people (although admittedly most are rework vendors) the consensus is that with this small a part you pretty much need visio
Electronics Forum | Fri May 25 00:31:07 EDT 2007 | Mike Konrad
Never use a water softener for defluxing. They add sodium to the water which is bad for boards. The white residue may be flux. If that's the case, either the dishwasher is not powerful enough or the wash water is not hot enough. Another possibili
Electronics Forum | Fri May 25 13:24:38 EDT 2007 | mfgengr
I had a similar problem a long time ago. I eventually traced the problem to undercured solder resist. The flux was reacting with what was left of the uncured resist, leaving a white residue. We could not even hand scrub this off. The solution was to
Electronics Forum | Sat Jun 09 07:59:14 EDT 2007 | davef
A keypad overlay is used to adapt one basic keypad design to a variety of applications. The overlay is positioned on top of the key board to match functions on the overlay with buttons on the keypad. The user selects a function on the by pressing t
Electronics Forum | Wed Jun 13 08:24:30 EDT 2007 | davef
Most often, when people talk about a dishwasher, here on SMTnet, they're talking about a batch cleaner, not a dishwasher from Sears, or someplace like that. For limited applications, a home use dishwasher will do a perfectly adequate job of cleaning
Electronics Forum | Wed Jun 13 12:45:32 EDT 2007 | rgduval
We use an older industrial dish washer to clean our boards, and it works out pretty well. Economical, at least. I'd like to upgrade to an in-line, but it's not in the budget, yet. We've got ours piped with de-ionized water, and a hot water heater
Electronics Forum | Fri Jun 22 03:11:53 EDT 2007 | vlazern
Our Heller oven is functioning well. However, we see defects from the oven, such as shifted coil inductor components, and missing chip components from time to time. When we re-scan the board at the AOI, the defect was not present at that stage,hence
Electronics Forum | Fri Jun 29 09:51:27 EDT 2007 | bjrap3
I have never had a problem with any other BGA's that I reworked. I recently found out that the BGA that we are trying to rework is made poorly and warps automatically from the heat. There is nothing that we could do to prevent this. Also the board
Electronics Forum | Mon Jul 16 12:03:42 EDT 2007 | davef
We're aware of no industy acceptance standard for max moisture content of a board. For more on moisture levels, get a copy of: "Removing Moisture from Electronic Components and Assemblies", CS Leech, Jr, Circuits Assembly, May 1994. The article disc
