Electronics Forum | Tue Jan 16 21:00:11 EST 2001 | davef
Two good sources of information are: 1 IPC-7525 Stencil Design Guidelines 2 SMTnet fine Archives [once the guys get them back up and running after the conversion is complete]
Electronics Forum | Fri Jul 13 14:56:01 EDT 2001 | stevenamacdonald
One of our board vendors recently switched their stencil design to home plate apertures. Since the change the quality and yield of their PCB's has went south, Could this process change be the cause?
Electronics Forum | Fri Aug 30 17:43:34 EDT 2002 | davef
Search the fine SMTnet Archives to get started. We use 'glue' 'epoxy' 'adhesive' [without the ' of course] interchangeably.
Electronics Forum | Mon Dec 16 13:33:09 EST 2002 | pjc
square apertures provide better paste release than round in most applications. See IPC 7525 Stencil Design Guidelines
Electronics Forum | Thu Mar 27 11:49:18 EST 2003 | kenlchin
In printing,the thickness of solder paste perpendicular to the Squegge direction is always lower 1 mil than that parallel to the Squegge direction,so Insufficient Solder may occur.I think you may slow printing speed or widen appertures to resolve it.
Electronics Forum | Fri Jul 09 09:01:28 EDT 2004 | Richard
Could anybody recommend a good resource(course/book/website) related to Paste-in-hole? In particular, I'm interested in stencil design considerations. Thanks, Richard
Electronics Forum | Wed Mar 02 05:04:36 EST 2005 | ABHI
What is your micro BGA requiremnets? I mean ball dia / height with a 0.5 mm pitch? I can give you the stencil design, if you make known the parameters.
Electronics Forum | Mon Apr 04 09:30:49 EDT 2005 | russ
Andrew, we need a lot more information to help. 1. what is the open caused from? bemt pins, non-wetting, board bowing, or no paste deposited. 2. What is your current stencil design? 3. What does this connector look like and what are the pins? Rus
Electronics Forum | Wed Jul 13 10:47:41 EDT 2005 | Tom
Thanks a lot folks! Seems like 1:1 in generally accepted. However Cookson/Alpha seem to be the only ones complicating homeplates to "roundy" instead of "triangular". I'll do some tests... Thanks again!
Electronics Forum | Wed Jul 13 12:27:40 EDT 2005 | Bob R.
Are you seeing solder balling on your discretes when you print 1:1? Are you washing your boards?
