Electronics Forum | Fri Sep 25 16:47:57 EDT 2009 | esoderberg
0.5mm pitch QFP's are typically mixed with large components on all of my boards. I usually use a 6 mil stencil with a minimum aperture width of 10 mils. Normal aperture size is 10 x 50 which causes shorts about 20% of the time. A recent purchase of
Electronics Forum | Wed Nov 25 01:00:54 EST 2009 | henry_usa_stencils
The design of the opening apertures for the glue stencil and the metal thickness.Its is very important. The Engineer of the stencils supplier have to look into the height of the components and the gap of the 2 leg(pads)and give the assemly house an s
Electronics Forum | Thu Nov 12 20:37:41 EST 2009 | isd_jwendell
I used a clam-shell type for years before switching to the LPKF. The ZelPrint LT300 looks a lot like the LPKF one. I prefer the LPKF or ZelPrint style because they are capable of getting better (more accurate and more consistent) prints when compared
Electronics Forum | Tue Jan 26 10:26:54 EST 2010 | bandjwet
Dear SMTNetters: Based on your experiences is it really necessary to have today's YAG laser-fabricated stencils electropolished? I undertsand that this "requirement" is a carry-over from the days of CO2-fabricated lasers where the hole wall quality
Electronics Forum | Sun Apr 11 01:32:35 EDT 2010 | ravikumarasahitec
Dear SMT stencil User, I am Ravikumar form Asahitec stencil pvt ltd chennai india. We basically manyfacturing of laser cut stencil (step up/down). and also we are trader of Lint free wiping rolls. The origin manufacturing company supplying all kind
Electronics Forum | Sat Aug 21 02:27:21 EDT 2010 | isd_jwendell
The paste you dispense will not solder the same as the one you use with a stencil. The paste for the stencil will have a higher metal content. I was not working with dispensing as small as you are, but after evaluating the cost of the stencil vs. lon
Electronics Forum | Wed Jun 29 14:27:07 EDT 2011 | wrongway
Hello all I have used a couple of types one of them only clamped on two sides and you used a wrench and screwed the bolt down till it was tight ( what is tight) and there was no fram at all around the stencil so people got cut. the second one we us
Electronics Forum | Thu Jul 05 16:19:49 EDT 2012 | jorge_quijano
The PCB has 9 QFNs, distributed arround the whole board, but the ones in the edges are the ones with the problem. My stencil is 0.005" (I use to have a 0.006"), yesterday I realize after talking to my vendor that the stencil is manufactured in 2 step
Electronics Forum | Fri Aug 03 10:18:36 EDT 2012 | pctech
Greetings everyone, I am trying to figure out away to clean our stencils by hand. Unfortunately, we do not have a stencil cleaner due to size and finance of our company. I am using Ionox to clean them daily.But the walls do not come clean. Is this a
