Electronics Forum | Fri Aug 29 10:18:31 EDT 2008 | rrpowers
We saw this one time when we were trying to develop some lead-free product. It ended up being copper migration. Some of the pads had a brown discoloration and those that did would not wet very well. Your elemental analysis would have shown if ther
Electronics Forum | Tue Sep 09 11:15:49 EDT 2008 | vladig
I wish i saw at least one problem posted here being solved by the "knob turning" technique
Electronics Forum | Sun Sep 28 07:44:57 EDT 2008 | engr
I was talking with a friend of mine the other day about component footprint verses component body size. He said the footprint is the body size, it this true? I always saw them as being different.
Electronics Forum | Wed Oct 01 10:30:33 EDT 2008 | stepheniii
Be sure to peel the potatoes. I saw a guy use a potato to purify gold on the TV show Rough Science. Seriously though I would think SAC305 to SN100C wouldn't be as bad as eutectic to leadfree.
Electronics Forum | Wed Nov 05 13:17:58 EST 2008 | mrmaint
Take a look at your profile. Early on in the development of our leadfree process we saw excessive voids on BGA'S. We tweeked our reflow profile and were able to bring our voids down to about 9% or less. Also found that some paste mfgs. worked better
Electronics Forum | Wed Nov 19 14:08:55 EST 2008 | stepheniii
TI was leadfree before ROHS. I saw TI solderability issues over 10 years ago. The leads have paladium and need higher reflow temperatures.
Electronics Forum | Wed Feb 18 22:20:05 EST 2009 | LH Ng
Hi All, Does anyone know if there is any standard equipment capable for Ceramic/Alumina based PCB depenaling (cut into odd shape)? I am aware of diamond saw cutter, but it only limit to straight line cut. Thanks. LH
Electronics Forum | Tue Sep 22 08:53:37 EDT 2009 | stepheniii
The only time I ever saw problems with stenciling glue was when one know it all operator was using IPA to clean the stencil. He didn't seem to be able to understand that alcohol was a curing agent for that particular glue. But other than that, as l
Electronics Forum | Tue Sep 29 06:14:15 EDT 2009 | Sean
Hi Davef, This photo taken on field returned board. Previously, we never saw such thing..Perhaps, this could be escapee to the field. Anyway, what is the potential root cause at each stage of the process? Thanks, Sean
Electronics Forum | Mon Mar 22 04:14:36 EDT 2010 | mun4o
Sorry,I saw 'ShoRate' gauge at the back of the machine.Yes, when fluxer working, the ball moving.But from fluxer head flow only air.
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