Electronics Forum | Tue Dec 05 08:23:14 EST 2006 | davef
How about a stepped stencil? Not ideal but ... As far as overprinting goes, try: http://www4.uic.com/wcms/WCMS2.nsf/index/Resources_44.html
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 | Fri Dec 08 11:30:19 EST 2006 | ganoi
We discussed about applying 2 dots of glue on either sides of the LED body, but have yet to try it out. Other discussions include conductive adhesive, using fixturing with weight, different stencil aperature design, hand soldering.
Electronics Forum | Fri Dec 15 07:37:07 EST 2006 | realchunks
Try changing blades. If still a problem, move job to another printer and cross feed to your existing line. If all else fails, try buying a new stencil. You could get new by Monday.
Electronics Forum | Mon Jan 08 03:47:47 EST 2007 | tk380514
as someone had said before, check you stencil and have it redesigned. I design our stencils for my factory and have inproved quality in BGA , QFP and 0603 case sizes. we did have 1 prototype series that used 0403 chips btu we had brand new feeders an
Electronics Forum | Fri Jan 19 14:32:35 EST 2007 | Mike Hunt
What pitch IC? Perhaps a nickel stencil will work. Are your board FR4? Warping the board could play a major factor in solder shorting.
Electronics Forum | Tue Jan 23 12:56:36 EST 2007 | CK
Here's a good thread: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=3026&#Message12325
Electronics Forum | Tue Jan 23 13:15:44 EST 2007 | stepheniii
Shouldn't the top of the board be at the exact same height as the top of the side clamps? Why are the clamps holding the stencil up off the board?
Electronics Forum | Mon Feb 05 17:39:53 EST 2007 | flipit
Remember, deionized water is very corosive. If the water is too deionized, 10 mega ohm, it will leach the ions from exposed metals. I had a stencil cleaner where the welds completely dissolved. The stainless steel tank was fine but the welds were
Electronics Forum | Wed Feb 14 11:00:55 EST 2007 | CK the Flip
Rob, just curious how did you overcome this through stencil design? Did you play around with foil thickness and aperture geometry?
