Electronics Forum: no solder fillets (Page 6 of 66)

QFN PCB Pad no Drain Hole

Electronics Forum | Sat May 18 10:21:09 EDT 2013 | davef

isd.jww: Comments are: * Current thinking has flux volatiles being the major contributor to voiding, not scavanging by via * I have no reason to think that 0.3mm via won't gladly accept solder. Plug them, if that's a concern. * If your concern is ina

no clean flux + wave soldering issue

Electronics Forum | Wed Aug 27 15:49:43 EDT 2008 | grics

I think WML ought to have some photos on how to do this...

no clean flux + wave soldering issue

Electronics Forum | Wed Aug 27 22:54:44 EDT 2008 | omid_juve

what is WML ? can you please explain more

no clean flux + wave soldering issue

Electronics Forum | Thu Aug 28 16:21:23 EDT 2008 | realchunks

Larry, I'm seeing a pattern here of you and fire!?!?! What gives?

QFN PCB Pad no Drain Hole

Electronics Forum | Fri May 17 10:08:47 EDT 2013 | shrikant_borkar

HI, We are facing problem of Dry solder due to QFN Grounding Solder not Drain out in Via hole. also No drain hole on PCBs now we have 15k stock. which is leading to massive Rework. We have Tried by minimizing Ground Square apertures. but no Improvem

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 12:19:13 EDT 1999 | Brian

Hi all, We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. We are producing VGA cards and mother boards for PC's all components to be wave soldered are TH, the S

no clean flux + wave soldering issue

Electronics Forum | Fri Aug 29 14:57:24 EDT 2008 | wavemasterlarry

What, Listen. Everyone know wave solders catch fire from time to time. I've only been a part of these fires a coupel times. Less than the number of fingers on my hands, so I don't think it's any different then anyone elses. Plus I havn't pulled o

QFN PCB Pad no Drain Hole

Electronics Forum | Sun May 19 23:38:57 EDT 2013 | shrikant_borkar

We are EMS. Later revisions and Other models are get Modified. Now we have some remain Stock of Pcbs abd there end also. We have taken trial with Reduction in Apparatuses. But even small amount of solder paste at thermal Pad is causing QFN lift up.

Re: OSP with no clean fluxes

Electronics Forum | Fri Jun 19 19:07:07 EDT 1998 | Earl Moon

Does anyone have wave solder experience using OSP and VOC free no clean flux? Well, Steve you back in action. Yes, it works fine. Earl Moon

QFN PCB Pad no Drain Hole

Electronics Forum | Fri May 17 16:15:50 EDT 2013 | markhoch

Wait.... No drain hole? Well then how are you supposed to get all that pesky solder to pull down off the part??? Have I been doing this wrong for the last 20 years??


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