Electronics Forum | Wed Jan 20 20:29:17 EST 1999 | Tony A
| | Bernie, Steve Gregory approach is the simplest solution. But,If you ever get yourself into a real bind and need an array of holes added and the cost of a new stencil is astronomical. Approach Hamlet at BeamOn. I have seen him add and enlarge hole
Electronics Forum | Wed Feb 22 10:00:58 EST 2006 | dougs
We've just set up a couple of products with 0.5mm pitch uBGA devices on them, i went for 5thou thick, laser cut nickel (to aid paste release) square pads same size as the diameter of the uBGA pads. Or you could go to a 4 thou nickel stencil, better
Electronics Forum | Wed May 22 13:40:24 EDT 2002 | Hussman69
Boy, I step out for a bit and everybody picks on me (just joking). I believe I may have been off base a bit. Checking every bit of your stencil design is very good - I do that too. I calculate LXWXH and reduce or over print where needed, depending
Electronics Forum | Wed Aug 18 17:59:09 EDT 1999 | Mik Horvath
| | Hi, | | I'd like to ask some tips about the merits and shortcomings o | | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | | application? | | The boards contain
Electronics Forum | Wed Aug 18 18:10:33 EDT 1999 | Mik Horvath
| | Hi, | | I'd like to ask some tips about the merits and shortcomings o | | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | | application? | | The boards contain
Electronics Forum | Fri Nov 19 22:48:26 EST 1999 | mark
Steve, your comments from your stencil vendor are very interesting. Any decent laser cutter automatically cuts a trapezoidal aperture. This is just the nature of the cutting. We have a bunch of lasers (and chem-etch). You have to polish your laser cu
Electronics Forum | Wed Nov 20 16:36:41 EST 2002 | davef
Electroformed stencils cost about twice as much as other stencils, but they to have better paste release characteristics than laser cut stencils.
Electronics Forum | Wed Nov 01 12:19:42 EST 2000 | Fraser
Steve, someone somewhere is feeding you a line!! if you increase the draft angle from || to / \ on your laser cut stencil you increase the surface area of the side wall and hence increase the likelyhood of the paste sticking in the aperture. Whats m
Electronics Forum | Tue Oct 06 09:06:35 EDT 1998 | MMurphy
| I am looking for anyone out there that has had experience with stenciling with chipbonder adhesives. I need information on material and stencil design. Go to the Stencil Design Guidelines page under the Technical Information section of the alphas
Electronics Forum | Sun Dec 08 23:40:19 EST 2002 | nonotalent
Hi all, We are currently having problems with > a laser-cut stencil that is electropolished and > nickel plated with 9-mil openings. The paste > does not release well from the apertures. We are > having to wipe after every print. The board is >
