Electronics Forum | Wed Mar 14 02:04:40 EST 2001 | pjc
zam, each paste mfg. has different "stencil life" times. check w/ your paste mfg's specification for stencil life. also, temp and humidity inside the printer's chamber effects "stencil life" time. we keep ours around 20C @ 50% RH. higher temps and l
Electronics Forum | Fri Apr 13 10:08:48 EDT 2001 | gcs
dgrenier is on the right track. We are a volume shop and with a up back stencil you can keep CFM line going with no down time. DMPO also at our shop have inproved. We also use AOI equipemnt as a process indicator to monitor when stenicls need to be c
Electronics Forum | Thu Jul 20 13:23:30 EDT 2000 | Ross Clunie
Bob We are just starting to look in to this process and have been told that it can't be done using a stencil to print the solder paste onto the PCB (of course it was by an equipment manufacturer trying to sell a paste dispnecer). Is this a far commen
Electronics Forum | Tue Jun 05 20:45:54 EDT 2001 | davef
So, yer lookin' to detect a ~25um glob on the wall of the aperture on yer stencil, eh? Why not wash your stencils before you put them away? That's what we do. Give 'em a quick looksee, then rack 'em, if they're clean. Give 'em anudda looksee befo
Electronics Forum | Thu Jun 07 16:33:22 EDT 2001 | davef
I too know of no product like you desire, but I have a lead for you to follow that might get you further than you're getting now. Call Lumonics [Lumonics, 130 Lombard St, Oxnard, CA 93030 805.485.5559 fax3335 http://www.gsilumonics.com]. They ma
Electronics Forum | Mon Jul 30 18:52:43 EDT 2001 | Brian W.
You did not provide the stencil thickness or your aspect ratio. If your aspect ratio (Aperture width/stencil thickness) is less than 1.5, the paste will not release correctly from the aperture, leaving paste in the aperture. For example, if your pa
Electronics Forum | Tue Oct 12 11:47:51 EDT 1999 | Jose RG
Hi, We are in the process of evaluate our solder paste,incoming inspection over the solder paste, stencil requirments: 1- Is anybody using/requiring 1000 Kcps or more on viscosity to your solder paste provider ? Why ?? 2- Is anybody using step stenc
Electronics Forum | Thu Jun 03 15:00:48 EDT 1999 | Deon Nungaray
.020" pitch spacing. Which have yielded my process excelent results. My main stencil supplier is I-Source in Irvine, CA and has pretty much standardized on 100% lazer cut stencils for competetive pricing. Hope this helps. Deon Nungaray SMT Mfg. Eng
Electronics Forum | Thu May 13 12:58:16 EDT 1999 | Tony
| What is the best way to re-ball a BGA? Who has the best system for doing it? | J.J, BEAM ON technology is the stencil house that has a unique unit that uses stencils to re-ball BGA's, their # is (408) 982-0164. I-Source Technical Services is anot
Electronics Forum | Wed Apr 21 03:10:37 EDT 1999 | Richard Cooper
To all who will be potentially my salvation, I am currently researching Polyimide stencils for possible use and manufacture. If I may be indulged - with due reference to all past enquiries and notes on the subject - can anyone offer an up to date op
