Electronics Forum | Tue Oct 11 10:49:14 EDT 2005 | jhagve
HI We start to make a product which have a 0.4 mm pitch IC and start having problems with not enough solder printed, to solve this problem we had to increase the manual cleaning, now we are cleaning the stencil every 8 printings, before we was runnin
Electronics Forum | Tue Apr 27 08:13:28 EDT 1999 | wayne sanita
i am trying to design a stencil fixture for manual printing. has anyone done this before or has an idea? thanks
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 Oct 14 10:04:02 EDT 1998 | Dr. Kantesh Doss, Siemens Energy & Automation, Inc.
Sanjay: Keys to successful adhesive printing are: 1. Understanding the flow behavior of the adhesive under constant shear stress 2. Stencil design, i.e. stencil aperture opening 3. PWB Footprint 4. Stencil printing parameters Optimizing all these fac
Electronics Forum | Mon Oct 17 11:16:09 EDT 2005 | slthomas
There are a lot of things that might affect your cleaning efficiency. Paste type (no clean or w/s?), cleaning chemistry, aperture aspect ratio (aperture width/stencil thickness), "linty" wipes, etc. Another thing you need to look at is the frequency
Electronics Forum | Fri Jan 28 19:26:51 EST 2011 | jlawson
Milara has a combined Stencil printer + jet Printing ??? Print and then jet print areas not printed or top up prints.
Electronics Forum | Fri Oct 14 14:09:19 EDT 2005 | bschreiber
Your problem is not the 0.4 pitch. Your problem is the manual cleaning. Manual cleaning will only remove the solder paste from the surface of the stencil. What's more, manual cleaning will force additional contamination into the 0.4 pitch apertures
Electronics Forum | Fri Oct 14 07:56:32 EDT 2005 | davef
On understencil cleaning: * It's a good idea to do this to reduce printing defects, as you say. * We clean dry. * Our cleaning frequency varies acording to product, maybe ranging from 10 to 20 prints, averaging around 12 to 15. * As long as cleaning
Electronics Forum | Tue Feb 02 09:01:34 EST 2021 | denism
The main feature of the step on the stencil is the excess of paste on adjacent components. Clearance between step and fine pitch components must be at least 10 mm. Might better try over printing?
Electronics Forum | Fri Nov 01 00:12:16 EST 2002 | Darby
Ive always preferred "Put another log on the fire" for those emotional moments. Why don't you tell a couple of these purveyors of print that you haven't got a clue. See who is the most helpful in giving you some time and knowledge so that you then ha
