Electronics Forum | Fri Jun 02 08:50:47 EDT 2006 | russ
Hmmm interesting, we utilize 5 mil stencils and print to same height as you and do not experience these failures. May I ask what paste you are using and what the spacings are of your pad design? But anyhow, if it works it works.
Electronics Forum | Tue Jun 06 17:00:36 EDT 2006 | pjc
Be carefull of the effect on other components with a 7mil stencil, like fine-pitch devices will bridge more, excess solder.
Electronics Forum | Fri Jun 09 17:45:05 EDT 2006 | mika
We have some problem with the Pb-free SOIC's at the UIC GSM2 on the Flexjet head camera; (seem to remember this from before, but I can't find it on this forum). The Pb-free small SOIC:s are reflecting the light differently than leaded parts and are
Electronics Forum | Sat Jul 14 01:59:22 EDT 2007 | nurquhar
You can get laser cut stencils in mylar 3 or 4 mil plastic sheet. This company will cut one for you form $25 for a 4 sq inch mask. See http://www.smtstencil.com/. Apparently there good for one-off to small bactch production. Neil
Electronics Forum | Wed Oct 04 16:18:06 EDT 2006 | cw
My Peak ~ 228-230C (customer wants to see this temperature). solder ball size - 20mil diameter Please advise ASAP. Thanks a lot!!!
Electronics Forum | Thu Dec 07 18:13:13 EST 2006 | russ
Just had anopther thought, what type of parts are you using on this board? You may want to try a thin stencil like 5 mil or so this may help you. also can this "tilt" be from a movement during reflow? Russ
Electronics Forum | Thu Dec 21 21:09:58 EST 2006 | MFG CAVEMAN
Ditto what Russ said. We are doing the same with the same results. We also will add 10-15mils to the toe end of the pads to have some chance at forming a toe fillet. MFG'r recommended padstacks are not to be trusted. We only process with no-clean
Electronics Forum | Thu Feb 08 15:47:08 EST 2007 | realchunks
We use 1 to 1 aperture on a 6 mil stencil, no problems. Do not over print unless your board resist allows you too.
Electronics Forum | Tue Mar 27 09:05:44 EDT 2007 | jerry
We lost the video processor module for the downward looking camera. twice in 6 months... We dont get 15 mil with quad but are looking for a machine that will. Jerry
Electronics Forum | Tue Apr 17 17:30:09 EDT 2007 | jaimebc
Our experience with leaded paste and SAC305, for 0402's, has been positive with the following stencil designs: 1.- 5 mil thickness. 2.- Home plate design. Hope it helps.
