Electronics Forum | Fri Mar 04 18:28:21 EST 2011 | hegemon
First, I would inspect for lack of solder bridges from the center slug to the outside leads. I would then look for evidence that the solder paste has reflowed beneath the component, without leaving too much void percentage. Typically we allow up
Electronics Forum | Sat Feb 19 11:40:40 EST 2011 | ravo
Hi everybody, I am here seeking your experience and asking your help, I want to update our SMT production line as I already hace FUJI CP6 and QP242 machines beside GL2 and oven our new product including 60 components 0402 (1mm*0.5mm ) and 2 BGAs w
Electronics Forum | Sat Mar 12 18:32:29 EST 2011 | jlawson
It is pretty hard to wave solder fine pitch parts bad enought with 0.5mm let alone 0.4mm It can be done but need N2 inert wave soldering & need layout design to accommodate this... Iy it is a QFP need to run part 45 deg into wave and if possible in
Electronics Forum | Fri Apr 22 05:01:19 EDT 2011 | azrina
Hi, I am doing my master degree in flux cleaning process for flip chip assemblies and required to establish a new receipt for flux cleaning. currently, i am doing screening process for the parameters involve ; temp,pressure, surfactants, speed and a
Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy
Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble
Electronics Forum | Fri Aug 12 08:13:12 EDT 2011 | rway
The only thing I see that might be a fuse is the green vertical axial leaded component next to the third from the bottom white 4-pin header. It's labeled ?718 or 710. I don't know if this is a resistor or a pico fuse. You can try to ohm it out. An
Electronics Forum | Tue Aug 23 16:48:29 EDT 2011 | jax
assuming Sn05Pb93.5Ag1.5 Without knowing what you are trying to solder, PTH or SMT, the time might not be that far off. Does that time include stripping, cleaning, plating the leads prior to soldering onto the board?... pre-tinning the board as well
Electronics Forum | Wed Sep 07 00:47:53 EDT 2011 | woodsmt
PCB, What is telling you that you have cold solder? You do not give much info. My QA/QC love this term to describe a multiple of issues. They are usally very wrong. If this is a reflow process and it just affects one part? An SSOP is not likley t
Electronics Forum | Tue Sep 13 11:05:38 EDT 2011 | nucleartoast
I worked for Electrovert for 20 years as a machine designer. Our first computer controlled solder machine the Century 2000 used Infra red pyrometers that were very accurate - once you calibrated it against what you wanted to measure. So the aim and s
Electronics Forum | Wed Sep 21 17:53:19 EDT 2011 | action_101
I would like some input on reworking BGA's and the best method. I have reworked BGA's since 1998 using both micro stencils and just flux dipping the parts. I have reworked SN/PB and lead-free (AIM NC258) BGA's for the last 8 yrs. with just flux. I ha
