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?
Electronics Forum | Wed Jul 13 14:42:25 EDT 2005 | Bman
I know this is asking a lot, but could you please tell us what WS LF pastes you have looked at? What issues are you seeing with these WS pastes? Thanks
Electronics Forum | Fri Oct 28 09:27:36 EDT 2005 | russ
havfe you tried all paste manufacturers? Dog ears are usually from a little sticking to the aperture walls. this is usually the result of stencil design and or table seperation speed.
Electronics Forum | Thu Dec 08 09:47:46 EST 2005 | slthomas
I'm with Grant on the .005" foil thickness. The key is to keep your aspect ratio (aperture width/foil thickness) over 1.5, laser cut, and I like trapezoidal aps. too.
Electronics Forum | Thu Dec 08 16:00:12 EST 2005 | chunks
Also the zipper pattern will work too. Samir, why are you calling me a man? Last I checked, the only thing hotter than these double D�s were my behind. That�s how we roll in Cali.
Electronics Forum | Fri Dec 09 04:38:11 EST 2005 | Rob
Madam, that's rather forward! By zipper pattern do you mean offsetting the apertures on every other ultra fine pitch qfp pad? Thanks, Rob. (we don't roll in England, we amble)
