Electronics Forum: smt glob (Page 1 of 1)

Solder balls

Electronics Forum | Mon May 07 17:59:07 EDT 2001 | davef

One thing I forgot to add about the globs of solder on your bottom side SMT components after wave soldering: The excess solder is likely reducing the reliability of these components, because of the difference in CTE betweeen the ceramic base on the

SMT on boards with COBs

Electronics Forum | Sat Jul 16 07:46:17 EDT 2005 | davef

If you have a glob of epoxy on your board, it will be difficult to stencil you paste on that side. Dispensing paste may be a better choice.

Where can i find Chip-on-board Forum?

Electronics Forum | Tue Jan 09 21:33:49 EST 2007 | davef

Setup Guy Thanks for the compliment. So, COB is not SMT. What is it? What kind of assembly areas do they use to print, place, reflow, and glob-top [or wire bond / encapsulate] COB? Any information you gave give to clairify this is appreciated.

Wire bonding on gold fingers

Electronics Forum | Tue Jul 01 17:38:24 EDT 2003 | jartman

I've faced this several times in the past, and the only real solution is to wirebond before SMT assembly. Everything leaves a residue, and trying to clean a residue off later is basically hopeless. This may require some trickery in your SMT process

Re: Via-in-pad

Electronics Forum | Tue Jan 25 21:59:44 EST 2000 | Dave F

Michael: On reliabiliity, consider that: � IPC-SM-782, "Surface Mount Design And Land Pattern Standard" and IPC-D-279, "Design Guidelines for Reliable Surface Mount Technology Printed Board Assemblies" specifically describe via in pads as "poor des

Where can i find Chip-on-board Forum?

Electronics Forum | Tue Jan 09 22:04:48 EST 2007 | Guest

Set Up Guy, I am not sure if the COB you are refering to means Circuit on Board . If yes, this process also include SMT . Package is a combination of some passive components and bare die. Passives are normally attached thru SMT using solder te

Is more epoxy better?

Electronics Forum | Mon May 21 17:34:22 EDT 2001 | davef

Continuing the line of Michael's, the previous poster, comments ... The more Krispy Kremes, the better. Yeth!!! The more beer, the better. Yeth!!! The more epoxy, the better. Uh, I don think so!!! We look at this from a papa bear, mama bear, bab

Re: Re: VME Assemblies

Electronics Forum | Mon Apr 27 07:37:42 EDT 1998 | Scott Davies

| | I realize this is a SMT forum, but I have another | | problem related to electronics assembly and hope there | | will be someone out there that can save my life (this | | time). | | We build quite a few VME assemblies to which we attach | | a SA

SMT termination visual and solderability issues.

Electronics Forum | Tue Feb 14 13:16:49 EST 2006 | Carol Stirling

CRITICAL DILEMA! Has anyone run into the problem described below and if so, what was the fix (besides not dealing with this Supplier)? Also, we do not have component manufacturing process experience. We are purchasing a surge resistor that function


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