Electronics Forum | Wed May 03 21:07:36 EDT 2000 | Eric Chua
Hi Steve, I had face problem before. What I did, add addition process which is screen print that apply adhesive. During thru-hole assemble, the components hold strong by the solder. Try this.
Electronics Forum | Thu Apr 13 21:02:37 EDT 2000 | Mario Carluccio
Can anyone advise me what are the types of contaminants which can be present on a printed circuit board at the very beginning of a SMT line. Of these contaminants, are any of them detrimental to the SMT process (i.e. label application, or solder pas
Electronics Forum | Sat Apr 08 09:32:51 EDT 2000 | Matt
Make sure your screen aperture size is about 80%, and you should not have a problem. Some pastes require a hump profile, to get rid of balls.
Electronics Forum | Fri Mar 03 13:41:43 EST 2000 | pr
Is it o.k. to clean my glue stencils in the same IPA stencil cleaner I use for solder paste? Also if anyone with experience in stenciling glue can lead me away from first time pitfalls I would appreciate that as well. thanks in advance
Electronics Forum | Fri Feb 25 14:41:12 EST 2000 | C.K.
http://www.smtnet.com/electronicsforum/view_message.cfm?message=0007291#7291 * See a past message of mine ! * ...can be found in the archives.
Electronics Forum | Mon Feb 19 11:25:07 EST 2001 | markt
I am currently cleaning solder paste and adhesive stencils and misprinted substrates manually by using IPA, chem wipes, Q-tips, etc. Can you recommend a machine and chemistry that will clean all these applications?
Electronics Forum | Wed Feb 21 22:08:23 EST 2001 | Dave E
Well, the vendor claims the contaminant caused the component failures. So? The only feasible possibilities would be contaminated solder paste, wash water or coating -- or maybe the problem is due to defective resistors?
Electronics Forum | Mon Mar 05 13:08:16 EST 2001 | billschreiber
Hi Roger, Our customers use their Smart Sonic Stencil Cleaners for cleaning SMT and wave pallets. There are two primary protocols used. 1) If you have a large quantity of pallets and they are becoming contaminated rapidly, a dedicated stencil clean
Electronics Forum | Sat Mar 24 16:34:06 EST 2001 | Stefan
Can you increase the placement force on your P&P machine? It should squeeze the solder paste to all sides including the heel.
Electronics Forum | Fri Mar 30 09:08:54 EST 2001 | rtodd
Has anyone heard of an AOI manufacturer by the name of SVS? They may concentrate on solder paste inspection and not 'true' AOI. Any information would be helpful.
