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 | Tue Jun 21 17:30:26 EDT 2011 | semiconjt
> Has anybody have eperience with stepped ( down and up )laser cutted stencils? >> What is manufacturing method of "patchwork" stepped stencils ?? Thanks Jacek Tomaszewski SEMICON Sp.zo.o -Poland
Electronics Forum | Thu Jun 23 10:06:10 EDT 2011 | davef
Leave it to the Eurolanders to come-up with a goofy, confusing name for something simple. Stepped stencils are chemical etched or laser cut. IPC-7525 provides guidelines on designing stepped stencils. Look here http://www.ipc.org/TOC/IPC-7525.pdf
Electronics Forum | Wed Jun 22 11:38:21 EDT 2011 | SBecmpe
I have purchased step up and down stencils for specific situations. What do you mean by "Patchwork"? Is this a rework process?
Electronics Forum | Wed Jun 22 18:52:56 EDT 2011 | semiconjt
tTo explain what I mean...sorry for my bad Engilsh... please find short " patchwork stencil" description from EPP Europe. http://www.epp-online.de/europe/-/article/16537487/15944614/Innovators-of-laser-processing-technology /art_co_INSTANCE_0000/max
Electronics Forum | Fri Oct 25 16:40:06 EDT 2002 | davef
Nor ment as a criticism of anyone, but you really need to become intimate with your stencil supplier. This is not one of those "throw it over the wall" buying relationships, like you can have with buying pencils. View this an opportunity to develop
Electronics Forum | Thu Sep 02 08:06:01 EDT 1999 | Wolfgang Busko
| | I'd like to know the advantages and disadvantages between the two. | | | | Thanks and regards, | | However, I really like aperture reduction best after running the experiment while using .006" thick foils as the practical limit. This really w
Electronics Forum | Tue Feb 26 11:19:31 EST 2013 | anton99
Stephen, That's true and I am going to include the reflow time in our changeovers. That way if its taking to long to change the oven temperature it will show up in our metrics. I agree, if we miss a step in the changeover process our metrics will be
Electronics Forum | Thu Sep 02 07:22:03 EDT 1999 | Earl Moon
| I'd like to know the advantages and disadvantages between the two. | | Thanks and regards, | | Both have their place. When using less fine pitch (.025" +) with fine pitch (.020" or less and BGA's) a .007" thick stencil may be used. This would re
Electronics Forum | Wed Aug 31 10:50:50 EDT 2005 | aj
Grant, We run the exact same process as you described. 5 thou stencil, 1:1 ratio aj
