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 | Fri Apr 29 18:48:03 EDT 2022 | proceng1
Kapton works great, but note that Kapton is about 2.5 mils thick, so if you are placing it near other apertures, you are essentially adding to the thickness of your stencil. I've also used some Kapton near parts that need a bit more paste, like co
Electronics Forum | Wed Aug 25 15:51:58 EDT 1999 | JohnW
| Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products. Cons
Electronics Forum | Fri Aug 27 13:31:47 EDT 1999 | swsng
1.5 FATOR FOR 20MILS QFP REDUCE 2 MILS HEEL AND INCREASE 2MIL AT TOES AT SIDES -1MILS EACH. SWSNG
Electronics Forum | Fri Sep 17 09:44:26 EDT 2004 | davef
We agree with Russ. * Haven't used them in 10+ years. * Size of keepout for the stepped apertures needs to be large. * Manipulating aperure size to manage paste volume for specific components is not difficult.
Electronics Forum | Fri Sep 17 09:55:16 EDT 2004 | soease
Hi russ, thanks for answers, I thought that playing with apertures was the solution if paste is able to lose from the screen with fine pitches. But I'll take in consideration all of your remarks for the next designs to be develloped.
Electronics Forum | Mon Apr 14 17:41:21 EDT 2008 | janz
Hello, That is working for us. If you have a look at the Indium or Cookson recommendation they are very similar. Just make few diffrent patterns of the BGA and find out what is workin for you. Regards Jan
Electronics Forum | Wed Mar 27 16:54:47 EST 2002 | davef
STARTING RANGES * Pressure � 1 pound/inch of blade (metal); 1.6-3 pound/inch (plastic) * Speed - 0.5 to 3 inch per sec [for standard pitch]; 0.5 to 1 inch per sec [for fine pitch] Your paste supplier�s recommendation is a good place to start. * Sepa
Electronics Forum | Mon Apr 09 12:52:00 EDT 2018 | slthomas
We are about to do a second iteration of something we struggled mightily with last time and I'm hoping to at least make a step in the right direction. There are 12 of these parts on the board and virtually all of them required removal and replacemen
Electronics Forum | Wed Feb 20 19:59:10 EST 2008 | pnguyvu
An experienced stencil designer suppose to check gerber data before making stencil it take 5 minutes to do this easily in computer after that analyze components if there's any critical parts in order to modify the aperture at USA STENCILS INC we have
