Electronics Forum | Wed Oct 21 10:18:00 EDT 2009 | stepheniii
Make sure the ground pad is reduced on the stencil and window paned. The solder on the thermal pad can lift the part up, especially if it traps gas. 360-380C does sound insane. I would believe a manufacturer saying 360-380F before I could believe
Electronics Forum | Wed Nov 04 03:33:04 EST 2009 | valeo
Hi Davef, I have already checked the SMTnet archives but unfortunetly I didn't find answers regarding mechanical behviour specifications of component glued on substrat. This king of soldering process is new for us. For example, the specification f
Electronics Forum | Wed Dec 23 14:05:13 EST 2009 | spitkis2
Thanks for the replies. I haven't soldered to a chrome plated pad in the past and have my doubts so thought I'd ask here. Our customer supplied the material and for some reason decided to change the plating to chrome. We only found out about this
Electronics Forum | Wed Jan 06 09:38:59 EST 2010 | lynn_norman
Via failure could be caused by cracks in the barrel, or thin plating, or fractures in the traces leading to the vias, . X-ray analysis could pick up a fractured trace and cross-sectioning of the vias could pick up the cracks and thin plating. Secon
Electronics Forum | Tue Jan 12 02:37:43 EST 2010 | graceytiu07
Hello Lyn, I am experiencing same scenario. There were flux residues on the board. My solder is a no-clean paste. These units fail only when it undergoes 85 deg C and 85 RH. But during room temp, the functionality is OK. Do you have a report that su
Electronics Forum | Sun Jan 31 18:05:30 EST 2010 | davef
Questions are: * What kind of oil is this? Where did it come from? * In olden days, we used to pour oil on the wave solder pot to limit dross formation and loosen-up the solder. Miss that stuff, sigh. * Is there oil under the BGA? It's surface ten
Electronics Forum | Tue Feb 02 09:31:20 EST 2010 | markhoch
I just realized that I should've been more specific. (My question was certainly open ended) I'm concerned with Wave Soldering a Metal Body, Two-Leaded Crystal Oscillator such as this: http://www.citizencrystal.com/images/pdf/m-hcm49.pdf Any thoughts
Electronics Forum | Tue Feb 23 12:56:03 EST 2010 | vleasher
Is there any harm in washing SMT soldered with NoClean paste? The PCA has some large thru-hole connectors that we would prefer to do as water soluble on out selective solder but the SMT consists of LGA's and other low parts that we would not be able
Electronics Forum | Fri Mar 05 21:38:29 EST 2010 | 89jeong
Hello Guys. Many thanks for your interest in this matter. I believe we can solver this. The affected part is Photo coupler and has the same metallization. FYI, i attached another picture. You can compare the solder fillet of leads. The affected posit
Electronics Forum | Tue Mar 30 17:52:15 EDT 2010 | cusackmusic
They are very finiky. If you have good solder paste, and a slight down pressure, to make sure the LED is "stuck" to the board, you should be able to place it. Pick it up on the center of the flat, NOT the lens. Even with the vacuum turned off, t
