Electronics Forum | Thu May 07 08:11:58 EDT 2009 | davef
We don't have a good answer for you, but we do have several thoughts on the issue: * First, tin in your solder or solderability protection is going to diffuse into the copper trace or pad on the board naturally. You can stop that by using a protectiv
Electronics Forum | Wed May 27 14:29:25 EDT 2009 | jax
Universal use to sell a a device, machine mountable, that could place this connector. I am not sure if they still sell it... It has been 3-4 years since I saw it in action. The upgrade would force the boards stops to remain in the Up position while
Electronics Forum | Mon Jun 01 11:38:28 EDT 2009 | operator
So would the proper technique be as follows: 1. Grounded operator picks up PCB from ESD rack and attaches a 1meg(wrist strap cord)shunt to ground to a grounding surface on the pcb. 2. operator sprays conformal coating onto pcb using a spr
Electronics Forum | Tue Jun 09 13:16:18 EDT 2009 | jack100
We are looking at feasibility concerns of using a QFN 16 from Motorola. I have a couple of questions regarding their recommended PCB design guidelines. 1) Does anyone know why they would recommend coming out of the pads with a narrow trace (.1mm wid
Electronics Forum | Tue Sep 01 02:57:42 EDT 2009 | d0min0
davef As for the repair : - with hot air blower it is not possible (you can melt, but it will not wet) - with standard iron - no problem to repair (no additional material is needed) isd.jwendell yes, the profile is checked on those places (same si
Electronics Forum | Tue Oct 27 13:56:36 EDT 2009 | julie331975
I work for a CEM. We are having some quality issues with some pcb's that came from China. (I know, big surprise) Can anyone with pcb manufacturing experience look at some pictures I have and give me an opinion as to what could go wrong in the pcb man
Electronics Forum | Tue Nov 24 10:03:45 EST 2009 | andrzej
Actully none couse we glue them. Please see attached file - there are red dots marking glue placment. I understand you want to check if there is any sense in gluing components. I`ll ask one more time - Is anoyne who reworked SMDs with SAC305 where
Electronics Forum | Wed Jan 06 01:43:27 EST 2010 | oddbudman
Hello, we have recently had some products returned (they were installed and operating in the field for around 2 months before they were returned). After looking at the boards it seems the vias have failed. We now have 2 pc pcbs with the same Via fa
Electronics Forum | Wed Mar 03 01:48:57 EST 2010 | 89jeong
Hello Sir. Our customer asked me why the solder did not cover the surface of the potocopuler lead. There are 2 ea of photocopuler on pcb and the leads are totally 8ea. But only one is showing this problem. When i reviewed the reflow profile, there
Electronics Forum | Fri Mar 05 02:59:59 EST 2010 | grahamcooper22
Hi, Do you have a picture on one of these leads where the solder has covered the lead ? As this is a gull wing device I wouldn't expect solder to cover it. I expect to see a toe fillet / wetting around the sides of the lead and a heel fillet. If your
.gif)
