Electronics Forum | Wed Oct 14 13:52:59 EDT 1998 | Bill Schreiber
Dear Sanjay, An important issue involved when stencil printing adhesives vs. solder paste is: How do you clean the stencils after printing? Do you need two machines? Two chemistries? Two waste streams? What are the potential environmental impacts an
Electronics Forum | Wed Mar 27 12:37:12 EST 2002 | jax
Barry, If you are looking to set up a documented process with set parameters you might think about performing a DOE based on the parameters you can control or change. With any measurement device you should be able to log the info gathered so you ca
Electronics Forum | Fri Nov 08 14:58:59 EST 2002 | davef
On the board support issue: DEK and Ovation Products make board support things to get at the issue you describe. Ovation hosted an On-Board Forum on SMTnet a while ago.
Electronics Forum | Wed Nov 13 23:50:23 EST 2002 | iman
we changed our top/bottom clamping system in the Printer, to a side-edge clamping system. This removed the higher paste issue similar to your thread.
Electronics Forum | Sat Nov 23 11:34:52 EST 2002 | mark
There is some superb tooling offered by a company called Transiton Automation, http://www.board-lok.com. There are some different choices, full molded tooing ... a service,... and re-usable fine grid pin array tooling.
Electronics Forum | Thu Feb 13 11:44:08 EST 2003 | vortex
Heraeus Inc. Circuit Materials Div, 24 union hill rd. West Conshohocken, PA 19428 (610) 825-6050
Electronics Forum | Fri Feb 14 17:33:38 EST 2003 | dgjjr
We use Thermoset MA-420 on a pair of Elite 6920 printers. Excellent results. It took some experimentation with aperture sizes and stencil thickness but it works great.
Electronics Forum | Wed Dec 15 09:00:07 EST 2004 | russ
All of the SMT adhesives that I have used are non-conductive by themselves. I assume that the solder joints are formed by wave soldering?
Electronics Forum | Fri Mar 04 13:19:43 EST 2005 | Slow Ride
I would use a spot solder machine. If not, why not spray the mask onto the board? Use a Camalot machine or something similar. Using a stencil over placed components wil yield a thick mask - right? That's why I'd spray.
Electronics Forum | Fri Mar 04 13:22:39 EST 2005 | pr
I believe DEK manufactures stencils that will do this. I'm sure their Apps. engineers could help you with squeegee material etc. good luck, pr
