Electronics Forum | Tue Feb 19 13:00:25 EST 2019 | slthomas
Everything rob said makes perfect sense. That said, do you have a robust, infallible paste management system? ;) Have you tried multiple tubes and multiple date codes of paste and had the same results? Is it stored properly (on the tip, assuming i
Electronics Forum | Mon Mar 11 12:58:31 EDT 2024 | denism
Hi Dima, A past job used a PSE 300 from KOLB for 10 years. With proper maintenance, no problems were found. DST InJet was used in another production. As far as I know, there were no problems either. DST also has an interesting option, such as measuri
Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef
Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c
Electronics Forum | Wed Jul 19 09:21:54 EDT 2006 | Chunks
That's like asking who's Mom is the best Mom. Your main goal in choosing a screen printer is based on several things: Size for your boards. Speed of your line. Board layout in ref to edge clearance / use of breakaways. Post inspection 2D/3D of paste
Electronics Forum | Mon Feb 19 11:45:09 EST 2001 | sallyt
We are using a �spray� type stencil cleaner and hot DI water to clean water washable solder paste. I want to use the stencil cleaner to also clean misprinted PCBs. However, we consistently find solder balls on side A of a double-sided misprint. We
Electronics Forum | Fri Apr 13 14:08:53 EDT 2001 | CAL
Proper setup and cleaning of stencil helps ensure repeatable printing performance. Cleaning processes need to be compatible with materials used in the manufacturing of stencils and solder paste. IPC 7525 should also help you out. We here would Inspe
Electronics Forum | Sun Mar 30 21:20:48 EST 2003 | Dreamsniper
Yes, I come from a land down under...currently participating in an unnecessary war in IRAQ! But what about paste replenishment on both heads? Wastage? Damage to stencil problems if any? Maintenance? etc... thanks for all your info but I think I nee
Electronics Forum | Thu Aug 08 10:58:18 EDT 2002 | Tom Gervascio
I'm interested in sharing any information on bumping of LAnd Grid Array (i.e. QFN) packages. due to PCB contraints, it's not possible to stencil paste onto sites for QFNs. That lead to a lot of experimentation with bumping of 6 mm QFN packages.In sum
Electronics Forum | Sat Nov 11 22:43:50 EST 2006 | KEN
Hey Sr. Tech. Before you get crazy with changing the process or chemistry I would first verify you are using the correct mix ratio. A refractometer can be a useful tool in these cases. I have seen this in the past where the maintenance technician
Electronics Forum | Mon Apr 09 20:13:01 EDT 2001 | davef
First, some people wait a lifetime for ... ;-) Second, how do you guys measure the stencil aperture clog? What do you think of the Magnaplancil from Fendelaz? It�s a double fyv-blue-green CO2 laser refract-defractometer. ;-) Third, do you really
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